From f4e0ad2e53d9ce34ec34f2840124e9b084577066 Mon Sep 17 00:00:00 2001
From: kpango <kpango@vdaas.org>
Date: Fri, 5 Feb 2021 13:09:28 +0900
Subject: [PATCH 01/22] refactor net connection

Signed-off-by: kpango <kpango@vdaas.org>
---
 internal/config/meta.go                       |  8 +-
 internal/config/tcp.go                        |  3 +
 internal/db/nosql/cassandra/cassandra.go      |  5 ++
 .../db/nosql/cassandra/cassandra_mock_test.go |  5 ++
 internal/db/nosql/cassandra/option.go         |  4 +-
 internal/db/nosql/cassandra/option_test.go    |  3 +-
 internal/net/grpc/client.go                   |  6 ++
 internal/net/grpc/option.go                   |  1 +
 internal/net/grpc/pool/pool.go                | 12 +--
 internal/net/net.go                           | 14 +++-
 internal/net/tcp/dialer.go                    | 74 ++++++++++++++++---
 internal/net/tcp/option.go                    | 27 ++++++-
 internal/servers/server/server.go             | 28 ++++---
 13 files changed, 157 insertions(+), 33 deletions(-)

diff --git a/internal/config/meta.go b/internal/config/meta.go
index 726cc0e0fa..df27812d4a 100644
--- a/internal/config/meta.go
+++ b/internal/config/meta.go
@@ -17,7 +17,11 @@
 // Package config providers configuration type and load configuration logic
 package config
 
-import "fmt"
+import (
+	"strconv"
+
+	"github.com/vdaas/vald/internal/net"
+)
 
 type Meta struct {
 	Host                      string      `json:"host" yaml:"host"`
@@ -39,7 +43,7 @@ func (m *Meta) Bind() *Meta {
 		m.Client = newGRPCClientConfig()
 	}
 	if len(m.Host) != 0 {
-		m.Client.Addrs = append(m.Client.Addrs, fmt.Sprintf("%s:%d", m.Host, m.Port))
+		m.Client.Addrs = append(m.Client.Addrs, net.JoinHostPort(m.Host, strconv.FormatInt(int64(m.Port), 10)))
 	}
 	return m
 }
diff --git a/internal/config/tcp.go b/internal/config/tcp.go
index c825f087d2..b36f37a1cc 100644
--- a/internal/config/tcp.go
+++ b/internal/config/tcp.go
@@ -32,6 +32,7 @@ type TCP struct {
 type Dialer struct {
 	Timeout          string `yaml:"timeout" json:"timeout"`
 	KeepAlive        string `yaml:"keep_alive" json:"keep_alive"`
+	FallbackDelay    string `yaml:"fallback_delay" json:"fallback_delay"`
 	DualStackEnabled bool   `yaml:"dual_stack_enabled" json:"dual_stack_enabled"`
 }
 
@@ -50,6 +51,7 @@ func (d *DNS) Bind() *DNS {
 func (d *Dialer) Bind() *Dialer {
 	d.Timeout = GetActualValue(d.Timeout)
 	d.KeepAlive = GetActualValue(d.KeepAlive)
+	d.FallbackDelay = GetActualValue(d.FallbackDelay)
 	return d
 }
 
@@ -84,6 +86,7 @@ func (t *TCP) Opts() []tcp.DialerOption {
 		opts = append(opts,
 			tcp.WithDialerKeepAlive(t.Dialer.KeepAlive),
 			tcp.WithDialerTimeout(t.Dialer.Timeout),
+			tcp.WithDialerFallbackDelay(t.Dialer.FallbackDelay),
 		)
 		if t.Dialer.DualStackEnabled {
 			opts = append(opts,
diff --git a/internal/db/nosql/cassandra/cassandra.go b/internal/db/nosql/cassandra/cassandra.go
index 43d39d735b..6e2ea67257 100644
--- a/internal/db/nosql/cassandra/cassandra.go
+++ b/internal/db/nosql/cassandra/cassandra.go
@@ -27,6 +27,7 @@ import (
 	"github.com/scylladb/gocqlx/qb"
 	"github.com/vdaas/vald/internal/errors"
 	"github.com/vdaas/vald/internal/log"
+	"github.com/vdaas/vald/internal/net/tcp"
 )
 
 var (
@@ -156,6 +157,7 @@ type (
 		connectObserver          ConnectObserver
 		frameHeaderObserver      FrameHeaderObserver
 		defaultIdempotence       bool
+		rawDialer                tcp.Dialer
 		dialer                   gocql.Dialer
 		writeCoalesceWaitTime    time.Duration
 
@@ -305,6 +307,9 @@ func (c *client) Open(ctx context.Context) (err error) {
 		log.Debugf("failed to create session %#v", c)
 		return errors.ErrCassandraFailedToCreateSession(err, c.hosts, c.port, c.cqlVersion)
 	}
+	if c.rawDialer != nil {
+		c.rawDialer.StartDialerCache(ctx)
+	}
 	return nil
 }
 
diff --git a/internal/db/nosql/cassandra/cassandra_mock_test.go b/internal/db/nosql/cassandra/cassandra_mock_test.go
index b03757a7f6..564211ac55 100644
--- a/internal/db/nosql/cassandra/cassandra_mock_test.go
+++ b/internal/db/nosql/cassandra/cassandra_mock_test.go
@@ -34,6 +34,11 @@ func (dm *DialerMock) DialContext(ctx context.Context, network, addr string) (ne
 	return dm.DialContextFunc(ctx, network, addr)
 }
 
+func (dm *DialerMock) GetDialer() func(ctx context.Context, network, addr string) (net.Conn, error) {
+	return dm.DialContextFunc
+}
+func (dm *DialerMock) StartDialerCache(ctx context.Context) {}
+
 func TestMockClusterConfig_CreateSession(t *testing.T) {
 	t.Parallel()
 	type fields struct {
diff --git a/internal/db/nosql/cassandra/option.go b/internal/db/nosql/cassandra/option.go
index e7eda57b89..150d652445 100644
--- a/internal/db/nosql/cassandra/option.go
+++ b/internal/db/nosql/cassandra/option.go
@@ -25,6 +25,7 @@ import (
 
 	"github.com/gocql/gocql"
 	"github.com/vdaas/vald/internal/errors"
+	"github.com/vdaas/vald/internal/net/tcp"
 	"github.com/vdaas/vald/internal/timeutil"
 )
 
@@ -79,11 +80,12 @@ func WithHosts(hosts ...string) Option {
 }
 
 // WithDialer returns the option to set the dialer.
-func WithDialer(der gocql.Dialer) Option {
+func WithDialer(der tcp.Dialer) Option {
 	return func(c *client) error {
 		if der == nil {
 			return errors.NewErrInvalidOption("dialer", der)
 		}
+		c.rawDialer = der
 		c.dialer = der
 		return nil
 	}
diff --git a/internal/db/nosql/cassandra/option_test.go b/internal/db/nosql/cassandra/option_test.go
index 874b2f56ad..e8fe3aaf00 100644
--- a/internal/db/nosql/cassandra/option_test.go
+++ b/internal/db/nosql/cassandra/option_test.go
@@ -26,6 +26,7 @@ import (
 
 	"github.com/gocql/gocql"
 	"github.com/vdaas/vald/internal/errors"
+	"github.com/vdaas/vald/internal/net/tcp"
 	"github.com/vdaas/vald/internal/test/comparator"
 	"go.uber.org/goleak"
 )
@@ -147,7 +148,7 @@ func TestWithHosts(t *testing.T) {
 func TestWithDialer(t *testing.T) {
 	type T = client
 	type args struct {
-		der gocql.Dialer
+		der tcp.Dialer
 	}
 	type want struct {
 		obj *T
diff --git a/internal/net/grpc/client.go b/internal/net/grpc/client.go
index bd7de25ab9..a80584ca22 100644
--- a/internal/net/grpc/client.go
+++ b/internal/net/grpc/client.go
@@ -30,6 +30,7 @@ import (
 	"github.com/vdaas/vald/internal/errors"
 	"github.com/vdaas/vald/internal/log"
 	"github.com/vdaas/vald/internal/net/grpc/pool"
+	"github.com/vdaas/vald/internal/net/tcp"
 	"github.com/vdaas/vald/internal/observability/trace"
 	"github.com/vdaas/vald/internal/safety"
 	"github.com/vdaas/vald/internal/singleflight"
@@ -93,6 +94,7 @@ type gRPCClient struct {
 	conns               grpcConns
 	hcDur               time.Duration
 	prDur               time.Duration
+	dialer              tcp.Dialer
 	enablePoolRebalance bool
 	resolveDNS          bool
 	dopts               []DialOption
@@ -138,6 +140,10 @@ func (g *gRPCClient) StartConnectionMonitor(ctx context.Context) (<-chan error,
 		return nil, errors.ErrGRPCTargetAddrNotFound
 	}
 
+	if g.dialer != nil {
+		g.dialer.StartDialerCache(ctx)
+	}
+
 	ech := make(chan error, len(addrs))
 	for _, addr := range addrs {
 		if len(addr) != 0 {
diff --git a/internal/net/grpc/option.go b/internal/net/grpc/option.go
index b5aa7df8a4..fdb07e18aa 100644
--- a/internal/net/grpc/option.go
+++ b/internal/net/grpc/option.go
@@ -322,6 +322,7 @@ func WithKeepaliveParams(t, to string, permitWithoutStream bool) Option {
 func WithDialer(der tcp.Dialer) Option {
 	return func(g *gRPCClient) {
 		if der != nil {
+			g.dialer = der
 			g.dopts = append(g.dopts,
 				grpc.WithContextDialer(func(ctx context.Context, addr string) (net.Conn, error) {
 					return der.GetDialer()(ctx, "tcp", addr)
diff --git a/internal/net/grpc/pool/pool.go b/internal/net/grpc/pool/pool.go
index 0287ca0906..1e329f64b7 100644
--- a/internal/net/grpc/pool/pool.go
+++ b/internal/net/grpc/pool/pool.go
@@ -21,6 +21,7 @@ import (
 	"context"
 	"fmt"
 	"sort"
+	"strconv"
 	"strings"
 	"sync/atomic"
 	"time"
@@ -97,7 +98,7 @@ func New(ctx context.Context, opts ...Option) (c Conn, err error) {
 		if err != nil {
 			return nil, err
 		}
-		p.addr = fmt.Sprintf("%s:%d", p.host, p.port)
+		p.addr = net.JoinHostPort(p.host, strconv.FormatInt(int64(p.port), 10))
 	}
 
 	conn, err := grpc.DialContext(ctx, p.addr, p.dopts...)
@@ -107,7 +108,7 @@ func New(ctx context.Context, opts ...Option) (c Conn, err error) {
 		if err != nil {
 			return nil, err
 		}
-		p.addr = fmt.Sprintf("%s:%d", p.host, p.port)
+		p.addr = net.JoinHostPort(p.host, strconv.FormatInt(int64(p.port), 10))
 	}
 	if conn != nil {
 		err = conn.Close()
@@ -144,7 +145,7 @@ func (p *pool) Connect(ctx context.Context) (c Conn, err error) {
 		default:
 			var (
 				conn   *ClientConn
-				addr   = fmt.Sprintf("%s:%d", ips[i%len(ips)], p.port)
+				addr   = net.JoinHostPort(ips[i%len(ips)], strconv.FormatInt(int64(p.port), 10))
 				pc, ok = p.load(i)
 			)
 			if ok && pc != nil && pc.addr == addr && isHealthy(pc.conn) {
@@ -387,7 +388,7 @@ func (p *pool) lookupIPAddr(ctx context.Context) (ips []string, err error) {
 			ipStr = fmt.Sprintf("[%s]", ipStr)
 		}
 		var conn net.Conn
-		addr := fmt.Sprintf("%s:%d", ipStr, p.port)
+		addr := net.JoinHostPort(ipStr, strconv.FormatInt(int64(p.port), 10))
 		if net.DefaultResolver.Dial != nil {
 			ctx, cancel := context.WithTimeout(ctx, time.Millisecond*10)
 			conn, err = net.DefaultResolver.Dial(ctx, network, addr)
@@ -470,7 +471,8 @@ func (p *pool) scanGRPCPort(ctx context.Context) (err error) {
 func isGRPCPort(ctx context.Context, host string, port uint16) bool {
 	ctx, cancel := context.WithTimeout(ctx, time.Millisecond*5)
 	defer cancel()
-	conn, err := grpc.DialContext(ctx, fmt.Sprintf("%s:%d", host, port),
+	conn, err := grpc.DialContext(ctx,
+		net.JoinHostPort(host, strconv.FormatInt(int64(port), 10)),
 		grpc.WithInsecure(),
 		grpc.WithBlock(),
 	)
diff --git a/internal/net/net.go b/internal/net/net.go
index 3637597b39..658c0753fa 100644
--- a/internal/net/net.go
+++ b/internal/net/net.go
@@ -19,7 +19,6 @@ package net
 
 import (
 	"context"
-	"fmt"
 	"net"
 	"strconv"
 	"strings"
@@ -29,6 +28,7 @@ import (
 	"github.com/vdaas/vald/internal/errgroup"
 	"github.com/vdaas/vald/internal/errors"
 	"github.com/vdaas/vald/internal/log"
+	"github.com/vdaas/vald/internal/safety"
 )
 
 const (
@@ -97,6 +97,11 @@ func IsIPv4(addr string) bool {
 	return net.ParseIP(addr) != nil && strings.Count(addr, ":") < 2
 }
 
+// JoinHostPort joins the host/IP address and the port number,
+func JoinHostPort(host, port string) string {
+	return net.JoinHostPort(host, port)
+}
+
 // SplitHostPort splits the address, and return the host/IP address and the port number,
 // and any error occurred.
 // If it is the loopback address, it will return the loopback address and corresponding port number.
@@ -136,14 +141,15 @@ func ScanPorts(ctx context.Context, start, end uint16, host string) (ports []uin
 
 	var mu sync.Mutex
 
+	var der net.Dialer
 	for i := start; i >= start && i <= end; i++ {
 		port := i
-		eg.Go(func() error {
+		eg.Go(safety.RecoverFunc(func() error {
 			select {
 			case <-egctx.Done():
 				return egctx.Err()
 			default:
-				conn, err := net.Dial("tcp", fmt.Sprintf("%s:%d", host, port))
+				conn, err := der.DialContext(ctx, "tcp", JoinHostPort(host, strconv.FormatInt(int64(port), 10)))
 				if err != nil {
 					log.Warn(err)
 					return nil
@@ -158,7 +164,7 @@ func ScanPorts(ctx context.Context, start, end uint16, host string) (ports []uin
 				}
 				return nil
 			}
-		})
+		}))
 	}
 
 	if err = eg.Wait(); err != nil {
diff --git a/internal/net/tcp/dialer.go b/internal/net/tcp/dialer.go
index ad3b611f7e..2529d632de 100644
--- a/internal/net/tcp/dialer.go
+++ b/internal/net/tcp/dialer.go
@@ -26,6 +26,7 @@ import (
 	"time"
 
 	"github.com/vdaas/vald/internal/cache"
+	"github.com/vdaas/vald/internal/errgroup"
 	"github.com/vdaas/vald/internal/errors"
 	"github.com/vdaas/vald/internal/log"
 	"github.com/vdaas/vald/internal/net"
@@ -49,16 +50,18 @@ type dialer struct {
 	dnsCacheExpiration    time.Duration
 	dialerTimeout         time.Duration
 	dialerKeepAlive       time.Duration
+	dialerFallbackDelay   time.Duration
 	dialerDualStack       bool
 	addrs                 sync.Map
 	der                   *net.Dialer
 	dialer                func(ctx context.Context, network, addr string) (net.Conn, error)
+	eg                    errgroup.Group
 }
 
 type addrInfo struct {
 	addr string
 	host string
-	port uint16
+	port string
 	isIP bool
 }
 
@@ -90,10 +93,11 @@ func NewDialer(opts ...DialerOption) (der Dialer, err error) {
 	}
 
 	d.der = &net.Dialer{
-		Timeout:   d.dialerTimeout,
-		KeepAlive: d.dialerKeepAlive,
-		DualStack: d.dialerDualStack,
-		Control:   Control,
+		Timeout:       d.dialerTimeout,
+		KeepAlive:     d.dialerKeepAlive,
+		DualStack:     d.dialerDualStack,
+		FallbackDelay: d.dialerFallbackDelay,
+		Control:       Control,
 	}
 
 	d.dialer = d.dial
@@ -166,16 +170,18 @@ func (d *dialer) DialContext(ctx context.Context, network, address string) (net.
 func (d *dialer) cachedDialer(dctx context.Context, network, addr string) (conn net.Conn, err error) {
 	var (
 		host string
-		port uint16
+		port string
 		isIP bool
 	)
 	ai, ok := d.addrs.Load(addr)
 	if !ok {
-		host, port, isIP, err = net.Parse(addr)
+		var nport uint16
+		host, nport, isIP, err = net.Parse(addr)
 		if err != nil {
 			d.addrs.Delete(addr)
 			return nil, err
 		}
+		port = strconv.FormatUint(uint64(nport), 10)
 		d.addrs.Store(addr, &addrInfo{
 			host: host,
 			port: port,
@@ -194,10 +200,11 @@ func (d *dialer) cachedDialer(dctx context.Context, network, addr string) (conn
 	if d.dnsCache && !isIP {
 		if dc, err := d.lookup(dctx, host); err == nil {
 			for i := uint32(0); i < dc.Len(); i++ {
-				hostIP := dc.IP() + ":" + strconv.FormatUint(uint64(port), 10)
+				hostIP := net.JoinHostPort(dc.IP(), port)
 				if conn, err := d.dial(dctx, network, hostIP); err == nil {
 					return conn, nil
 				}
+				log.Debugf("failed to dial connection to %s\terror: %v", hostIP, err)
 			}
 			d.cache.Delete(host)
 		}
@@ -206,6 +213,7 @@ func (d *dialer) cachedDialer(dctx context.Context, network, addr string) (conn
 }
 
 func (d *dialer) dial(ctx context.Context, network, addr string) (conn net.Conn, err error) {
+	log.Debugf("%s connection dialing to addr %s", network, addr)
 	conn, err = d.der.DialContext(ctx, network, addr)
 	if err != nil {
 		defer func(conn net.Conn) {
@@ -221,16 +229,62 @@ func (d *dialer) dial(ctx context.Context, network, addr string) (conn net.Conn,
 	}
 
 	if d.tlsConfig != nil {
-		return tls.Client(conn, d.tlsConfig), nil
+		return d.tlsHandshake(ctx, conn, addr)
 	}
+
 	return conn, nil
 }
 
+func (d *dialer) tlsHandshake(ctx context.Context, conn net.Conn, addr string) (tconn *tls.Conn, err error) {
+	tctx, cancel := context.WithTimeout(ctx, d.der.Timeout)
+	defer cancel()
+	if d.tlsConfig.ServerName == "" {
+		var host string
+		host, _, err = net.SplitHostPort(addr)
+		if err != nil {
+			d.tlsConfig.ServerName = host
+		}
+	}
+	tconn = tls.Client(conn, d.tlsConfig)
+	ech := make(chan error)
+	d.eg.Go(safety.RecoverFunc(func() error {
+		select {
+		case <-tctx.Done():
+		case ech <- tconn.Handshake(): // wait for tls handshake connection
+		}
+		return nil
+	}))
+	select {
+	case <-tctx.Done():
+		err = tctx.Err()
+	case err = <-ech:
+		if err != nil {
+			terr := tctx.Err()
+			if terr != nil {
+				err = terr
+			}
+		}
+	}
+	if err != nil {
+		defer func(conn net.Conn) {
+			if conn != nil {
+				if err != nil {
+					err = errors.Wrap(conn.Close(), err.Error())
+					return
+				}
+				err = conn.Close()
+			}
+		}(conn)
+		return nil, err
+	}
+	return tconn, nil
+}
+
 func (d *dialer) cacheExpireHook(ctx context.Context, addr string) {
 	if err := safety.RecoverFunc(func() (err error) {
 		_, err = d.lookup(ctx, addr)
 		return
 	})(); err != nil {
-		log.Errorf("DNS cacheExpireHook error occurred: %v", err)
+		log.Errorf("DNS cacheExpireHook error occurred: %v\taddr:\t%s", err, addr)
 	}
 }
diff --git a/internal/net/tcp/option.go b/internal/net/tcp/option.go
index b8004f0099..4f8de66704 100644
--- a/internal/net/tcp/option.go
+++ b/internal/net/tcp/option.go
@@ -22,6 +22,7 @@ import (
 	"time"
 
 	"github.com/vdaas/vald/internal/cache"
+	"github.com/vdaas/vald/internal/errgroup"
 	"github.com/vdaas/vald/internal/timeutil"
 )
 
@@ -30,9 +31,11 @@ type DialerOption func(*dialer)
 
 var defaultDialerOptions = []DialerOption{
 	WithDialerKeepAlive("30s"),
-	WithDialerTimeout("30s"),
+	WithDialerTimeout("0s"),
+	WithDialerFallbackDelay("300ms"),
 	WithEnableDialerDualStack(),
 	WithDisableDNSCache(),
+	WithErrGroup(errgroup.Get()),
 }
 
 // WithCache returns the functional option to set the cache.
@@ -105,6 +108,20 @@ func WithDialerKeepAlive(dur string) DialerOption {
 	}
 }
 
+// WithDialerFallbackDelay returns the functional option to set the DialerFallbackDelay.
+func WithDialerFallbackDelay(dur string) DialerOption {
+	return func(d *dialer) {
+		if dur == "" {
+			return
+		}
+		pd, err := timeutil.Parse(dur)
+		if err != nil {
+			pd = time.Millisecond * 300
+		}
+		d.dialerFallbackDelay = pd
+	}
+}
+
 // WithTLS returns the functional option to set the DialerTLS.
 func WithTLS(cfg *tls.Config) DialerOption {
 	return func(d *dialer) {
@@ -139,3 +156,11 @@ func WithDisableDialerDualStack() DialerOption {
 		d.dialerDualStack = false
 	}
 }
+
+func WithErrGroup(eg errgroup.Group) DialerOption {
+	return func(d *dialer) {
+		if eg != nil {
+			d.eg = eg
+		}
+	}
+}
diff --git a/internal/servers/server/server.go b/internal/servers/server/server.go
index 9201b17807..0ba861b002 100644
--- a/internal/servers/server/server.go
+++ b/internal/servers/server/server.go
@@ -20,8 +20,8 @@ package server
 import (
 	"context"
 	"crypto/tls"
-	"fmt"
 	"net/http"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -228,7 +228,7 @@ func (s *server) ListenAndServe(ctx context.Context, ech chan<- error) (err erro
 			}
 		}
 
-		l, err := s.lc.Listen(ctx, "tcp", fmt.Sprintf("%s:%d", s.host, s.port))
+		l, err := s.lc.Listen(ctx, "tcp", net.JoinHostPort(s.host, strconv.FormatUint(uint64(s.port), 10)))
 		if err != nil {
 			return err
 		}
@@ -251,7 +251,7 @@ func (s *server) ListenAndServe(ctx context.Context, ech chan<- error) (err erro
 					s.mu.Unlock()
 				}
 
-				log.Infof("%s server %s starting on %s:%d", s.mode.String(), s.name, s.host, s.port)
+				log.Infof("%s server %s starting on %s://%s", s.mode.String(), s.name, l.Addr().Network(), l.Addr().String())
 
 				switch s.mode {
 				case REST, GQL:
@@ -301,19 +301,29 @@ func (s *server) Shutdown(ctx context.Context) (rerr error) {
 			log.Infof("server %s executing preStopFunc", s.name)
 			err = s.preStopFunc()
 			if err != nil {
-				ech <- err
+				select {
+				case <-ctx.Done():
+				case ech <- nil:
+				}
 			}
 			close(ech)
 			s.wg.Done()
-			return err
+			select {
+			case <-ctx.Done():
+			case ech <- nil:
+			}
+			return nil
 		}))
 		tctx, cancel := context.WithTimeout(ctx, s.pwt)
 		defer cancel()
-		<-tctx.Done()
-		err := <-ech
-		if err != nil {
-			rerr = err
+		select {
+		case <-tctx.Done():
+		case err := <-ech:
+			if err != nil {
+				rerr = err
+			}
 		}
+
 	} else {
 		tctx, cancel := context.WithTimeout(ctx, s.pwt)
 		defer cancel()

From 47cef3f8631e529971afb31a558b42df5a8e44b6 Mon Sep 17 00:00:00 2001
From: kpango <kpango@vdaas.org>
Date: Fri, 5 Feb 2021 17:26:58 +0900
Subject: [PATCH 02/22] close unclosed channel

Signed-off-by: kpango <kpango@vdaas.org>
---
 go.mod                     |  8 ++++----
 go.sum                     | 25 ++++++++++++++-----------
 internal/net/tcp/dialer.go |  3 ++-
 3 files changed, 20 insertions(+), 16 deletions(-)

diff --git a/go.mod b/go.mod
index 229f0b4502..6055afd3f9 100755
--- a/go.mod
+++ b/go.mod
@@ -5,7 +5,7 @@ go 1.15
 replace (
 	cloud.google.com/go => cloud.google.com/go v0.76.0
 	github.com/Azure/go-autorest => github.com/Azure/go-autorest v14.2.0+incompatible
-	github.com/aws/aws-sdk-go => github.com/aws/aws-sdk-go v1.37.3
+	github.com/aws/aws-sdk-go => github.com/aws/aws-sdk-go v1.37.5
 	github.com/boltdb/bolt => github.com/boltdb/bolt v1.3.1
 	github.com/chzyer/logex => github.com/chzyer/logex v1.1.11-0.20170329064859-445be9e134b2
 	github.com/coreos/etcd => go.etcd.io/etcd v3.3.25+incompatible
@@ -45,7 +45,7 @@ require (
 	github.com/cespare/xxhash/v2 v2.1.1
 	github.com/envoyproxy/protoc-gen-validate v0.1.0
 	github.com/fsnotify/fsnotify v1.4.9
-	github.com/go-redis/redis/v8 v8.4.11
+	github.com/go-redis/redis/v8 v8.5.0
 	github.com/go-sql-driver/mysql v1.5.0
 	github.com/gocql/gocql v0.0.0-20200131111108-92af2e088537
 	github.com/gocraft/dbr/v2 v2.7.1
@@ -78,8 +78,8 @@ require (
 	golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c
 	gonum.org/v1/hdf5 v0.0.0-20200504100616-496fefe91614
 	gonum.org/v1/plot v0.8.1
-	google.golang.org/api v0.38.0
-	google.golang.org/genproto v0.0.0-20210203152818-3206188e46ba
+	google.golang.org/api v0.39.0
+	google.golang.org/genproto v0.0.0-20210204154452-deb828366460
 	google.golang.org/grpc v1.35.0
 	gopkg.in/yaml.v2 v2.4.0
 	k8s.io/api v0.20.2
diff --git a/go.sum b/go.sum
index ad612284bf..fd14bb2841 100644
--- a/go.sum
+++ b/go.sum
@@ -60,8 +60,8 @@ github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hC
 github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
 github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
 github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY=
-github.com/aws/aws-sdk-go v1.37.3 h1:1f0groABc4AuapskpHf6EBRaG2tqw0Sx3ebCMwfp1Ys=
-github.com/aws/aws-sdk-go v1.37.3/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
+github.com/aws/aws-sdk-go v1.37.5 h1:9zJ1aXRk1gLSWEeaMXa7Hbv1pIM915T2tpaIJi0+mkA=
+github.com/aws/aws-sdk-go v1.37.5/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
@@ -164,8 +164,8 @@ github.com/go-openapi/swag v0.19.5 h1:lTz6Ys4CmqqCQmZPBlbQENR1/GucA2bzYTE12Pw4tF
 github.com/go-openapi/swag v0.19.5/go.mod h1:POnQmlKehdgb5mhVOsnJFsivZCEZ/vjK9gh66Z9tfKk=
 github.com/go-redis/redis v6.15.2+incompatible h1:9SpNVG76gr6InJGxoZ6IuuxaCOQwDAhzyXg+Bs+0Sb4=
 github.com/go-redis/redis v6.15.2+incompatible/go.mod h1:NAIEuMOZ/fxfXJIrKDQDz8wamY7mA7PouImQ2Jvg6kA=
-github.com/go-redis/redis/v8 v8.4.11 h1:t2lToev01VTrqYQcv+QFbxtGgcf64K+VUMgf9Ap6A/E=
-github.com/go-redis/redis/v8 v8.4.11/go.mod h1:d5yY/TlkQyYBSBHnXUmnf1OrHbyQere5JV4dLKwvXmo=
+github.com/go-redis/redis/v8 v8.5.0 h1:L3r1Q3I5WOUdXZGCP6g44EruKh0u3n6co5Hl5xWkdGA=
+github.com/go-redis/redis/v8 v8.5.0/go.mod h1:YmEcgBDttjnkbMzDAhDtQxY9yVA7jMN6PCR5HeMvqFE=
 github.com/go-sql-driver/mysql v1.5.0 h1:ozyZYNQW3x3HtqT1jira07DN2PArx2v7/mN66gGcHOs=
 github.com/go-sql-driver/mysql v1.5.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
@@ -379,8 +379,8 @@ github.com/onsi/ginkgo v1.8.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+W
 github.com/onsi/ginkgo v1.11.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
 github.com/onsi/ginkgo v1.12.1/go.mod h1:zj2OWP4+oCPe1qIXoGWkgMRwljMUYCdkwsT2108oapk=
 github.com/onsi/ginkgo v1.14.1/go.mod h1:iSB4RoI2tjJc9BBv4NKIKWKya62Rps+oPG/Lv9klQyY=
-github.com/onsi/ginkgo v1.14.2 h1:8mVmC9kjFFmA8H4pKMUhcblgifdkOIXPvbhN1T36q1M=
-github.com/onsi/ginkgo v1.14.2/go.mod h1:iSB4RoI2tjJc9BBv4NKIKWKya62Rps+oPG/Lv9klQyY=
+github.com/onsi/ginkgo v1.15.0 h1:1V1NfVQR87RtWAgp1lv9JZJ5Jap+XFGKPi00andXGi4=
+github.com/onsi/ginkgo v1.15.0/go.mod h1:hF8qUzuuC8DJGygJH3726JnCZX4MYbRB8yFfISqnKUg=
 github.com/onsi/gomega v0.0.0-20170829124025-dcabb60a477c/go.mod h1:C1qb7wdrVGGVU+Z6iS04AVkA3Q65CEZX59MT0QO5uiA=
 github.com/onsi/gomega v1.4.3/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
 github.com/onsi/gomega v1.5.0/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
@@ -388,8 +388,8 @@ github.com/onsi/gomega v1.7.0/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1Cpa
 github.com/onsi/gomega v1.7.1/go.mod h1:XdKZgCCFLUoM/7CFJVPcG8C1xQ1AJ0vpAezJrB7JYyY=
 github.com/onsi/gomega v1.10.1/go.mod h1:iN09h71vgCQne3DLsj+A5owkum+a2tYe+TOCB1ybHNo=
 github.com/onsi/gomega v1.10.2/go.mod h1:iN09h71vgCQne3DLsj+A5owkum+a2tYe+TOCB1ybHNo=
-github.com/onsi/gomega v1.10.4 h1:NiTx7EEvBzu9sFOD1zORteLSt3o8gnlvZZwSE9TnY9U=
-github.com/onsi/gomega v1.10.4/go.mod h1:g/HbgYopi++010VEqkFgJHKC09uJiW9UkXvMUuKHUCQ=
+github.com/onsi/gomega v1.10.5 h1:7n6FEkpFmfCoo2t+YYqXH0evK+a9ICQz0xcAy9dYcaQ=
+github.com/onsi/gomega v1.10.5/go.mod h1:gza4q3jKQJijlu05nKWRCW/GavJumGt8aNRxWg7mt48=
 github.com/opentracing/opentracing-go v1.1.0/go.mod h1:UkNAQd3GIcIGf0SeVgPpRdFStlNbqXla1AfSYxPUl2o=
 github.com/pascaldekloe/goe v0.0.0-20180627143212-57f6aae5913c/go.mod h1:lzWF7FIEvWOWxwDKqyGYQf6ZUaNfKdP144TG7ZOy1lc=
 github.com/pelletier/go-toml v1.2.0/go.mod h1:5z9KED0ma1S8pY6P1sdut58dfprrGBbd/94hg7ilaic=
@@ -678,6 +678,7 @@ golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20201112073958-5cba982894dd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210104204734-6f8348627aad/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210112080510-489259a85091/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c h1:VwygUrnw9jn88c4u8GD3rZQbqrP/tgas88tPUbBxQrk=
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -737,6 +738,7 @@ golang.org/x/tools v0.0.0-20200522201501-cb1345f3a375/go.mod h1:EkVYQZoAsY45+roY
 golang.org/x/tools v0.0.0-20200616133436-c1934b75d054/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20200618134242-20370b0cb4b2/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
+golang.org/x/tools v0.0.0-20201224043029-2b0845dc783e/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.0.0-20210105154028-b0ab187a4818/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.1.0 h1:po9/4sTYwZU9lPhi1tOrb4hCv3qrhiQ77LZfGa2OjwY=
@@ -772,8 +774,9 @@ google.golang.org/api v0.22.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/
 google.golang.org/api v0.24.0/go.mod h1:lIXQywCXRcnZPGlsd8NbLnOjtAoL6em04bJ9+z0MncE=
 google.golang.org/api v0.28.0/go.mod h1:lIXQywCXRcnZPGlsd8NbLnOjtAoL6em04bJ9+z0MncE=
 google.golang.org/api v0.29.0/go.mod h1:Lcubydp8VUV7KeIHD9z2Bys/sm/vGKnG1UHuDBSrHWM=
-google.golang.org/api v0.38.0 h1:vDyWk6eup8eQAidaZ31sNWIn8tZEL8qpbtGkBD4ytQo=
 google.golang.org/api v0.38.0/go.mod h1:fYKFpnQN0DsDSKRVRcQSDQNtqWPfM9i+zNPxepjRCQ8=
+google.golang.org/api v0.39.0 h1:zHCTXf0NeDdKTgcSQpT+ZflWAqHsEp1GmdpxW09f3YM=
+google.golang.org/api v0.39.0/go.mod h1:fYKFpnQN0DsDSKRVRcQSDQNtqWPfM9i+zNPxepjRCQ8=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.6.2/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
@@ -807,8 +810,8 @@ google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154/go.mod h1:FWY/as6D
 google.golang.org/genproto v0.0.0-20201110150050-8816d57aaa9a/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20201214200347-8c77b98c765d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20210202153253-cf70463f6119/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20210203152818-3206188e46ba h1:np3A9jnmE/eMtrOwwvUycmQ1XoLyj5nqZ41bAyYLqJ0=
-google.golang.org/genproto v0.0.0-20210203152818-3206188e46ba/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20210204154452-deb828366460 h1:pvsg2TgyP8bWrYqyL10tbNHu5KypD5DWJPrCjaTkwZA=
+google.golang.org/genproto v0.0.0-20210204154452-deb828366460/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v1.35.0 h1:TwIQcH3es+MojMVojxxfQ3l3OF2KzlRxML2xZq0kRo8=
 google.golang.org/grpc v1.35.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
 google.golang.org/protobuf v1.25.0 h1:Ejskq+SyPohKW+1uil0JJMtmHCgJPJ/qWTxr8qp+R4c=
diff --git a/internal/net/tcp/dialer.go b/internal/net/tcp/dialer.go
index 2529d632de..55862fe97d 100644
--- a/internal/net/tcp/dialer.go
+++ b/internal/net/tcp/dialer.go
@@ -248,6 +248,7 @@ func (d *dialer) tlsHandshake(ctx context.Context, conn net.Conn, addr string) (
 	tconn = tls.Client(conn, d.tlsConfig)
 	ech := make(chan error)
 	d.eg.Go(safety.RecoverFunc(func() error {
+		defer close(ech)
 		select {
 		case <-tctx.Done():
 		case ech <- tconn.Handshake(): // wait for tls handshake connection
@@ -256,7 +257,7 @@ func (d *dialer) tlsHandshake(ctx context.Context, conn net.Conn, addr string) (
 	}))
 	select {
 	case <-tctx.Done():
-		err = tctx.Err()
+		err = tctx.Err() // if Handshake timeout we should cancel rawconnection
 	case err = <-ech:
 		if err != nil {
 			terr := tctx.Err()

From e659767f0fe8aed0fb29b76839e0427c2588dd82 Mon Sep 17 00:00:00 2001
From: kpango <kpango@vdaas.org>
Date: Fri, 5 Feb 2021 17:33:22 +0900
Subject: [PATCH 03/22] fix

Signed-off-by: kpango <kpango@vdaas.org>
---
 internal/servers/server/server.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/internal/servers/server/server.go b/internal/servers/server/server.go
index 0ba861b002..2d07b6fbe3 100644
--- a/internal/servers/server/server.go
+++ b/internal/servers/server/server.go
@@ -298,6 +298,7 @@ func (s *server) Shutdown(ctx context.Context) (rerr error) {
 		ech := make(chan error, 1)
 		s.wg.Add(1)
 		s.eg.Go(safety.RecoverFunc(func() (err error) {
+			defer close(ech)
 			log.Infof("server %s executing preStopFunc", s.name)
 			err = s.preStopFunc()
 			if err != nil {
@@ -306,7 +307,6 @@ func (s *server) Shutdown(ctx context.Context) (rerr error) {
 				case ech <- nil:
 				}
 			}
-			close(ech)
 			s.wg.Done()
 			select {
 			case <-ctx.Done():

From 1c68e4ebba2e43ea1591a31f79b705ac7a3fa4e2 Mon Sep 17 00:00:00 2001
From: kpango <kpango@vdaas.org>
Date: Sat, 6 Feb 2021 05:32:13 +0900
Subject: [PATCH 04/22] fix failing test & add insecure option for user

Signed-off-by: kpango <kpango@vdaas.org>
---
 charts/vald/templates/_helpers.tpl         |   3 +
 charts/vald/values.yaml                    | 173 +++++++++++++++++----
 go.mod                                     |   4 +-
 go.sum                                     |   8 +-
 internal/config/tls.go                     |   4 +
 internal/config/tls_test.go                |   2 +
 internal/db/nosql/cassandra/conviction.go  |   2 +-
 internal/db/nosql/cassandra/option_test.go |   3 +-
 internal/net/tcp/dialer.go                 |  35 ++++-
 internal/net/tcp/dialer_test.go            |  56 ++++---
 internal/safety/safety.go                  |   2 +-
 internal/tls/option.go                     |   8 +
 internal/tls/option_test.go                |  75 +++++++++
 internal/tls/tls.go                        |  41 ++---
 pkg/gateway/meta/handler/grpc/handler.go   |   2 +-
 15 files changed, 326 insertions(+), 92 deletions(-)

diff --git a/charts/vald/templates/_helpers.tpl b/charts/vald/templates/_helpers.tpl
index ecfe92ecb5..670e7b2032 100755
--- a/charts/vald/templates/_helpers.tpl
+++ b/charts/vald/templates/_helpers.tpl
@@ -456,6 +456,7 @@ tls:
   cert: {{ default .default.tls.cert .Values.tls.cert | quote }}
   key: {{ default .default.tls.key .Values.tls.key | quote }}
   ca: {{ default .default.tls.ca .Values.tls.ca | quote }}
+  insecure_skip_verify: {{ default .default.tls.insecure_skip_verify .Values.tls.insecure_skip_verify }}
   {{- else }}
   {{- toYaml .default.tls | nindent 2 }}
   {{- end }}
@@ -551,6 +552,7 @@ dial_option:
       cert: {{ default .default.dial_option.tcp.tls.cert .Values.dial_option.tcp.tls.cert | quote }}
       key: {{ default .default.dial_option.tcp.tls.key .Values.dial_option.tcp.tls.key | quote }}
       ca: {{ default .default.dial_option.tcp.tls.ca .Values.dial_option.tcp.tls.ca | quote }}
+      insecure_skip_verify: {{ default .default.dial_option.tcp.tls.insecure_skip_verify .Values.dial_option.tcp.tls.insecure_skip_verify }}
       {{- else }}
       {{- toYaml .default.dial_option.tcp.tls | nindent 6 }}
       {{- end }}
@@ -574,6 +576,7 @@ tls:
   cert: {{ default .default.tls.cert .Values.tls.cert | quote }}
   key: {{ default .default.tls.key .Values.tls.key | quote }}
   ca: {{ default .default.tls.ca .Values.tls.ca | quote }}
+  insecure_skip_verify: {{ default .default.tls.insecure_skip_verify .Values.tls.insecure_skip_verify }}
   {{- else }}
   {{- toYaml .default.tls | nindent 2 }}
   {{- end }}
diff --git a/charts/vald/values.yaml b/charts/vald/values.yaml
index 5f3044aa4b..83ed45d3ae 100644
--- a/charts/vald/values.yaml
+++ b/charts/vald/values.yaml
@@ -408,6 +408,9 @@ defaults:
       # @schema {"name": "defaults.server_config.tls.ca", "type": "string"}
       # defaults.server_config.tls.ca -- TLS ca path
       ca: /path/to/ca
+      # @schema {"name": "defaults.server_config.tls.insecure_skip_verify", "type": "boolean"}
+      # defaults.server_config.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
+      insecure_skip_verify: false
   # @schema {"name": "defaults.grpc", "type": "object"}
   grpc:
     # @schema {"name": "defaults.grpc.client", "type": "object", "anchor": "grpc.client"}
@@ -539,14 +542,21 @@ defaults:
             dual_stack_enabled: true
           # @schema {"name": "defaults.grpc.client.dial_option.tcp.tls", "alias": "tls"}
           tls:
-            # defaults.grpc.client.dial_option.tcp.tls.enabled -- gRPC client TCP TLS enabled
+            # @schema {"name": "defaults.grpc.client.dial_option.tcp.tls.enabled", "type": "boolean"}
+            # defaults.grpc.client.dial_option.tcp.tls.enabled -- TLS enabled
             enabled: false
-            # defaults.grpc.client.dial_option.tcp.tls.cert -- gRPC client TCP TLS cert path
+            # @schema {"name": "defaults.grpc.client.dial_option.tcp.tls.cert", "type": "string"}
+            # defaults.grpc.client.dial_option.tcp.tls.cert -- TLS cert path
             cert: /path/to/cert
-            # defaults.grpc.client.dial_option.tcp.tls.key -- gRPC client TCP TLS key path
+            # @schema {"name": "defaults.grpc.client.dial_option.tcp.tls.key", "type": "string"}
+            # defaults.grpc.client.dial_option.tcp.tls.key -- TLS key path
             key: /path/to/key
-            # defaults.grpc.client.dial_option.tcp.tls.ca -- gRPC client TCP TLS ca path
+            # @schema {"name": "defaults.grpc.client.dial_option.tcp.tls.ca", "type": "string"}
+            # defaults.grpc.client.dial_option.tcp.tls.ca -- TLS ca path
             ca: /path/to/ca
+            # @schema {"name": "defaults.grpc.client.dial_option.tcp.tls.insecure_skip_verify", "type": "boolean"}
+            # defaults.grpc.client.dial_option.tcp.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
+            insecure_skip_verify: false
         # @schema {"name": "defaults.grpc.client.dial_option.keep_alive", "type": "object"}
         keep_alive:
           # @schema {"name": "defaults.grpc.client.dial_option.keep_alive.time", "type": "string"}
@@ -560,14 +570,21 @@ defaults:
           permit_without_stream: false
       # @schema {"name": "defaults.grpc.client.tls", "alias": "tls"}
       tls:
-        # defaults.grpc.client.tls.enabled -- gRPC client TLS enabled
+        # @schema {"name": "defaults.grpc.client.tls.enabled", "type": "boolean"}
+        # defaults.grpc.client.tls.enabled -- TLS enabled
         enabled: false
-        # defaults.grpc.client.tls.cert -- gRPC client TLS cert path
+        # @schema {"name": "defaults.grpc.client.tls.cert", "type": "string"}
+        # defaults.grpc.client.tls.cert -- TLS cert path
         cert: /path/to/cert
-        # defaults.grpc.client.tls.key -- gRPC client TLS key path
+        # @schema {"name": "defaults.grpc.client.tls.key", "type": "string"}
+        # defaults.grpc.client.tls.key -- TLS key path
         key: /path/to/key
-        # defaults.grpc.client.tls.ca -- gRPC client TLS ca path
+        # @schema {"name": "defaults.grpc.client.tls.ca", "type": "string"}
+        # defaults.grpc.client.tls.ca -- TLS ca path
         ca: /path/to/ca
+        # @schema {"name": "defaults.grpc.client.tls.insecure_skip_verify", "type": "boolean"}
+        # defaults.grpc.client.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
+        insecure_skip_verify: false
   # @schema {"name": "defaults.observability", "type": "object", "anchor": "observability"}
   observability:
     # @schema {"name": "defaults.observability.enabled", "type": "boolean"}
@@ -2607,15 +2624,23 @@ agent:
             keep_alive: 5m
             # agent.sidecar.config.client.tcp.dialer.dual_stack_enabled -- HTTP client TCP dialer dual stack enabled
             dual_stack_enabled: false
+          # @schema {"name": "agent.sidecar.config.client.tls", "alias": "tls"}
           tls:
-            # agent.sidecar.config.client.tcp.tls.enabled -- HTTP client TCP TLS enabled
+            # @schema {"name": "agent.sidecar.config.client.tls.enabled", "type": "boolean"}
+            # agent.sidecar.config.client.tls.enabled -- TLS enabled
             enabled: false
-            # agent.sidecar.config.client.tcp.tls.cert -- HTTP client TCP TLS cert path
+            # @schema {"name": "agent.sidecar.config.client.tls.cert", "type": "string"}
+            # agent.sidecar.config.client.tls.cert -- TLS cert path
             cert: /path/to/cert
-            # agent.sidecar.config.client.tcp.tls.key -- HTTP client TCP TLS key path
+            # @schema {"name": "agent.sidecar.config.client.tls.key", "type": "string"}
+            # agent.sidecar.config.client.tls.key -- TLS key path
             key: /path/to/key
-            # agent.sidecar.config.client.tcp.tls.ca -- HTTP client TCP TLS ca path
+            # @schema {"name": "agent.sidecar.config.client.tls.ca", "type": "string"}
+            # agent.sidecar.config.client.tls.ca -- TLS ca path
             ca: /path/to/ca
+            # @schema {"name": "agent.sidecar.config.client.tls.insecure_skip_verify", "type": "boolean"}
+            # agent.sidecar.config.client.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
+            insecure_skip_verify: false
         # @schema {"name": "agent.sidecar.config.client.transport", "type": "object"}
         transport:
           # @schema {"name": "agent.sidecar.config.client.transport.round_tripper", "type": "object"}
@@ -3405,14 +3430,21 @@ manager:
         max_idle_conns: 100
         # @schema {"name": "manager.backup.mysql.config.tls", "alias": "tls"}
         tls:
+          # @schema {"name": "manager.backup.mysql.config.tls.enabled", "type": "boolean"}
           # manager.backup.mysql.config.tls.enabled -- TLS enabled
           enabled: false
-          # manager.backup.mysql.config.tls.cert -- path to TLS cert
+          # @schema {"name": "manager.backup.mysql.config.tls.cert", "type": "string"}
+          # manager.backup.mysql.config.tls.cert -- TLS cert path
           cert: /path/to/cert
-          # manager.backup.mysql.config.tls.key -- path to TLS key
+          # @schema {"name": "manager.backup.mysql.config.tls.key", "type": "string"}
+          # manager.backup.mysql.config.tls.key -- TLS key path
           key: /path/to/key
-          # manager.backup.mysql.config.tls.ca -- path to TLS ca
+          # @schema {"name": "manager.backup.mysql.config.tls.ca", "type": "string"}
+          # manager.backup.mysql.config.tls.ca -- TLS ca path
           ca: /path/to/ca
+          # @schema {"name": "manager.backup.mysql.config.tls.insecure_skip_verify", "type": "boolean"}
+          # manager.backup.mysql.config.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
+          insecure_skip_verify: false
         # @schema {"name": "manager.backup.mysql.config.tls", "alias": "tcp"}
         tcp:
           dns:
@@ -3429,15 +3461,23 @@ manager:
             keep_alive: 5m
             # manager.backup.mysql.config.tcp.dialer.dual_stack_enabled -- TCP dialer dual stack enabled
             dual_stack_enabled: false
+          # @schema {"name": "manager.backup.mysql.config.tcp.tls", "alias": "tls"}
           tls:
-            # manager.backup.mysql.config.tcp.tls.enabled -- TCP TLS enabled
+            # @schema {"name": "manager.backup.mysql.config.tcp.tls.enabled", "type": "boolean"}
+            # manager.backup.mysql.config.tcp.tls.enabled -- TLS enabled
             enabled: false
-            # manager.backup.mysql.config.tcp.tls.cert -- path to TCP TLS cert
+            # @schema {"name": "manager.backup.mysql.config.tcp.tls.cert", "type": "string"}
+            # manager.backup.mysql.config.tcp.tls.cert -- TLS cert path
             cert: /path/to/cert
-            # manager.backup.mysql.config.tcp.tls.key -- path to TCP TLS key
+            # @schema {"name": "manager.backup.mysql.config.tcp.tls.key", "type": "string"}
+            # manager.backup.mysql.config.tcp.tls.key -- TLS key path
             key: /path/to/key
-            # manager.backup.mysql.config.tcp.tls.ca -- path to TCP TLS ca
+            # @schema {"name": "manager.backup.mysql.config.tcp.tls.ca", "type": "string"}
+            # manager.backup.mysql.config.tcp.tls.ca -- TLS ca path
             ca: /path/to/ca
+            # @schema {"name": "manager.backup.mysql.config.tcp.tls.insecure_skip_verify", "type": "boolean"}
+            # manager.backup.mysql.config.tcp.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
+            insecure_skip_verify: false
     # @schema {"name": "manager.backup.cassandra", "type": "object", "anchor": "cassandra"}
     cassandra:
       # @schema {"name": "manager.backup.cassandra.enabled", "type": "boolean"}
@@ -3520,15 +3560,22 @@ manager:
         page_size: 5000
         # @schema {"name": "manager.backup.cassandra.config.tls", "alias": "tls"}
         tls:
+          # @schema {"name": "manager.backup.cassandra.config.tls.enabled", "type": "boolean"}
           # manager.backup.cassandra.config.tls.enabled -- TLS enabled
           enabled: false
-          # manager.backup.cassandra.config.tls.cert -- path to TLS cert
+          # @schema {"name": "manager.backup.cassandra.config.tls.cert", "type": "string"}
+          # manager.backup.cassandra.config.tls.cert -- TLS cert path
           cert: /path/to/cert
-          # manager.backup.cassandra.config.tls.key -- path to TLS key
+          # @schema {"name": "manager.backup.cassandra.config.tls.key", "type": "string"}
+          # manager.backup.cassandra.config.tls.key -- TLS key path
           key: /path/to/key
-          # manager.backup.cassandra.config.tls.ca -- path to TLS ca
+          # @schema {"name": "manager.backup.cassandra.config.tls.ca", "type": "string"}
+          # manager.backup.cassandra.config.tls.ca -- TLS ca path
           ca: /path/to/ca
-        # @schema {"name": "manager.backup.cassandra.config.tcp", "alias": "tcp"}
+          # @schema {"name": "manager.backup.cassandra.config.tls.insecure_skip_verify", "type": "boolean"}
+          # manager.backup.cassandra.config.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
+          insecure_skip_verify: false
+        # @schema {"name": "manager.backup.cassandra.config.tls", "alias": "tcp"}
         tcp:
           dns:
             # manager.backup.cassandra.config.tcp.dns.cache_enabled -- TCP DNS cache enabled
@@ -3544,6 +3591,23 @@ manager:
             keep_alive: 10m
             # manager.backup.cassandra.config.tcp.dialer.dual_stack_enabled -- TCP dialer dual stack enabled
             dual_stack_enabled: false
+          # @schema {"name": "manager.backup.cassandra.config.tcp.tls", "alias": "tls"}
+          tls:
+            # @schema {"name": "manager.backup.cassandra.config.tcp.tls.enabled", "type": "boolean"}
+            # manager.backup.cassandra.config.tcp.tls.enabled -- TLS enabled
+            enabled: false
+            # @schema {"name": "manager.backup.cassandra.config.tcp.tls.cert", "type": "string"}
+            # manager.backup.cassandra.config.tcp.tls.cert -- TLS cert path
+            cert: /path/to/cert
+            # @schema {"name": "manager.backup.cassandra.config.tcp.tls.key", "type": "string"}
+            # manager.backup.cassandra.config.tcp.tls.key -- TLS key path
+            key: /path/to/key
+            # @schema {"name": "manager.backup.cassandra.config.tcp.tls.ca", "type": "string"}
+            # manager.backup.cassandra.config.tcp.tls.ca -- TLS ca path
+            ca: /path/to/ca
+            # @schema {"name": "manager.backup.cassandra.config.tcp.tls.insecure_skip_verify", "type": "boolean"}
+            # manager.backup.cassandra.config.tcp.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
+            insecure_skip_verify: false
         # @schema {"name": "manager.backup.cassandra.config.enable_host_verification", "type": "boolean"}
         # manager.backup.cassandra.config.enable_host_verification -- host verification enabled
         enable_host_verification: false
@@ -4137,15 +4201,22 @@ meta:
       route_randomly: true
       # @schema {"name": "meta.redis.config.tls", "alias": "tls"}
       tls:
+        # @schema {"name": "meta.redis.config.tls.enabled", "type": "boolean"}
         # meta.redis.config.tls.enabled -- TLS enabled
         enabled: false
-        # meta.redis.config.tls.cert -- path to TLS cert
+        # @schema {"name": "meta.redis.config.tls.cert", "type": "string"}
+        # meta.redis.config.tls.cert -- TLS cert path
         cert: /path/to/cert
-        # meta.redis.config.tls.key -- path to TLS key
+        # @schema {"name": "meta.redis.config.tls.key", "type": "string"}
+        # meta.redis.config.tls.key -- TLS key path
         key: /path/to/key
-        # meta.redis.config.tls.ca -- path to TLS ca
+        # @schema {"name": "meta.redis.config.tls.ca", "type": "string"}
+        # meta.redis.config.tls.ca -- TLS ca path
         ca: /path/to/ca
-      # @schema {"name": "meta.redis.config.tcp", "alias": "tcp"}
+        # @schema {"name": "meta.redis.config.tls.insecure_skip_verify", "type": "boolean"}
+        # meta.redis.config.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
+        insecure_skip_verify: false
+      # @schema {"name": "meta.redis.config.tls", "alias": "tcp"}
       tcp:
         dns:
           # meta.redis.config.tcp.dns.cache_enabled -- TCP DNS cache enabled
@@ -4161,15 +4232,23 @@ meta:
           keep_alive: 5m
           # meta.redis.config.tcp.dialer.dual_stack_enabled -- TCP dialer dual stack enabled
           dual_stack_enabled: false
+        # @schema {"name": "meta.redis.config.tcp.tls", "alias": "tls"}
         tls:
-          # meta.redis.config.tcp.tls.enabled -- TCP TLS enabled
+          # @schema {"name": "meta.redis.config.tcp.tls.enabled", "type": "boolean"}
+          # meta.redis.config.tcp.tls.enabled -- TLS enabled
           enabled: false
-          # meta.redis.config.tcp.tls.cert -- path to TCP TLS cert
+          # @schema {"name": "meta.redis.config.tcp.tls.cert", "type": "string"}
+          # meta.redis.config.tcp.tls.cert -- TLS cert path
           cert: /path/to/cert
-          # meta.redis.config.tcp.tls.key -- path to TCP TLS key
+          # @schema {"name": "meta.redis.config.tcp.tls.key", "type": "string"}
+          # meta.redis.config.tcp.tls.key -- TLS key path
           key: /path/to/key
-          # meta.redis.config.tcp.tls.ca -- path to TCP TLS ca
+          # @schema {"name": "meta.redis.config.tcp.tls.ca", "type": "string"}
+          # meta.redis.config.tcp.tls.ca -- TLS ca path
           ca: /path/to/ca
+          # @schema {"name": "meta.redis.config.tcp.tls.insecure_skip_verify", "type": "boolean"}
+          # meta.redis.config.tcp.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
+          insecure_skip_verify: false
       # @schema {"name": "meta.redis.config.kv_prefix", "type": "string"}
       # meta.redis.config.kv_prefix -- KV prefix
       kv_prefix: ""
@@ -4234,15 +4313,24 @@ meta:
       max_routing_key_info: 1000
       # meta.cassandra.config.page_size -- page size
       page_size: 5000
+      # @schema {"name": "meta.cassandra.config.tls", "alias": "tls"}
       tls:
+        # @schema {"name": "meta.cassandra.config.tls.enabled", "type": "boolean"}
         # meta.cassandra.config.tls.enabled -- TLS enabled
         enabled: false
-        # meta.cassandra.config.tls.cert -- path to TLS cert
+        # @schema {"name": "meta.cassandra.config.tls.cert", "type": "string"}
+        # meta.cassandra.config.tls.cert -- TLS cert path
         cert: /path/to/cert
-        # meta.cassandra.config.tls.key -- path to TLS key
+        # @schema {"name": "meta.cassandra.config.tls.key", "type": "string"}
+        # meta.cassandra.config.tls.key -- TLS key path
         key: /path/to/key
-        # meta.cassandra.config.tls.ca -- path to TLS ca
+        # @schema {"name": "meta.cassandra.config.tls.ca", "type": "string"}
+        # meta.cassandra.config.tls.ca -- TLS ca path
         ca: /path/to/ca
+        # @schema {"name": "meta.cassandra.config.tls.insecure_skip_verify", "type": "boolean"}
+        # meta.cassandra.config.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
+        insecure_skip_verify: false
+      # @schema {"name": "meta.cassandra.config.tls", "alias": "tcp"}
       tcp:
         dns:
           # meta.cassandra.config.tcp.dns.cache_enabled -- TCP DNS cache enabled
@@ -4258,6 +4346,23 @@ meta:
           keep_alive: 10m
           # meta.cassandra.config.tcp.dialer.dual_stack_enabled -- TCP dialer dual stack enabled
           dual_stack_enabled: false
+        # @schema {"name": "meta.cassandra.config.tcp.tls", "alias": "tls"}
+        tls:
+          # @schema {"name": "meta.cassandra.config.tcp.tls.enabled", "type": "boolean"}
+          # meta.cassandra.config.tcp.tls.enabled -- TLS enabled
+          enabled: false
+          # @schema {"name": "meta.cassandra.config.tcp.tls.cert", "type": "string"}
+          # meta.cassandra.config.tcp.tls.cert -- TLS cert path
+          cert: /path/to/cert
+          # @schema {"name": "meta.cassandra.config.tcp.tls.key", "type": "string"}
+          # meta.cassandra.config.tcp.tls.key -- TLS key path
+          key: /path/to/key
+          # @schema {"name": "meta.cassandra.config.tcp.tls.ca", "type": "string"}
+          # meta.cassandra.config.tcp.tls.ca -- TLS ca path
+          ca: /path/to/ca
+          # @schema {"name": "meta.cassandra.config.tcp.tls.insecure_skip_verify", "type": "boolean"}
+          # meta.cassandra.config.tcp.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
+          insecure_skip_verify: false
       # meta.cassandra.config.enable_host_verification -- host verification enabled
       enable_host_verification: false
       # meta.cassandra.config.default_timestamp -- default timestamp enabled
diff --git a/go.mod b/go.mod
index 6055afd3f9..9c9b8e666f 100755
--- a/go.mod
+++ b/go.mod
@@ -5,7 +5,7 @@ go 1.15
 replace (
 	cloud.google.com/go => cloud.google.com/go v0.76.0
 	github.com/Azure/go-autorest => github.com/Azure/go-autorest v14.2.0+incompatible
-	github.com/aws/aws-sdk-go => github.com/aws/aws-sdk-go v1.37.5
+	github.com/aws/aws-sdk-go => github.com/aws/aws-sdk-go v1.37.6
 	github.com/boltdb/bolt => github.com/boltdb/bolt v1.3.1
 	github.com/chzyer/logex => github.com/chzyer/logex v1.1.11-0.20170329064859-445be9e134b2
 	github.com/coreos/etcd => go.etcd.io/etcd v3.3.25+incompatible
@@ -21,7 +21,7 @@ replace (
 	github.com/gophercloud/gophercloud => github.com/gophercloud/gophercloud v0.15.0
 	github.com/gorilla/websocket => github.com/gorilla/websocket v1.4.2
 	github.com/hailocab/go-hostpool => github.com/monzo/go-hostpool v0.0.0-20200724120130-287edbb29340
-	github.com/klauspost/compress => github.com/klauspost/compress v1.11.8-0.20210203154158-6c96f3e2a592
+	github.com/klauspost/compress => github.com/klauspost/compress v1.11.8-0.20210205131735-b5cd74455ec9
 	github.com/tensorflow/tensorflow => github.com/tensorflow/tensorflow v2.1.2+incompatible
 	golang.org/x/crypto => golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad
 	google.golang.org/grpc => google.golang.org/grpc v1.35.0
diff --git a/go.sum b/go.sum
index fd14bb2841..32bdfc9e39 100644
--- a/go.sum
+++ b/go.sum
@@ -60,8 +60,8 @@ github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hC
 github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
 github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
 github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY=
-github.com/aws/aws-sdk-go v1.37.5 h1:9zJ1aXRk1gLSWEeaMXa7Hbv1pIM915T2tpaIJi0+mkA=
-github.com/aws/aws-sdk-go v1.37.5/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
+github.com/aws/aws-sdk-go v1.37.6 h1:SWYjRvyZw6DJc3pkZfRWVRD/5wiTDuwOkyb89AAkEBY=
+github.com/aws/aws-sdk-go v1.37.6/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
@@ -296,8 +296,8 @@ github.com/jung-kurt/gofpdf v1.16.2 h1:jgbatWHfRlPYiK85qgevsZTHviWXKwB1TTiKdz5Pt
 github.com/jung-kurt/gofpdf v1.16.2/go.mod h1:1hl7y57EsiPAkLbOwzpzqgx1A30nQCk/YmFV8S2vmK0=
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
-github.com/klauspost/compress v1.11.8-0.20210203154158-6c96f3e2a592 h1:NmvlF3t5svvdvoaViVoVWQf1Lj1yZK/uIsoAFUmnlEA=
-github.com/klauspost/compress v1.11.8-0.20210203154158-6c96f3e2a592/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdYsUV+/s2qKfXs=
+github.com/klauspost/compress v1.11.8-0.20210205131735-b5cd74455ec9 h1:OAhCmjDqWViQo/ZB+YeKShJ4DFrkmVRWRUGgzzJLs28=
+github.com/klauspost/compress v1.11.8-0.20210205131735-b5cd74455ec9/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdYsUV+/s2qKfXs=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/konsorten/go-windows-terminal-sequences v1.0.3 h1:CE8S1cTafDpPvMhIxNJKvHsGVBgn1xWYf1NbHQhywc8=
 github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
diff --git a/internal/config/tls.go b/internal/config/tls.go
index 20531e2313..ace45089fb 100644
--- a/internal/config/tls.go
+++ b/internal/config/tls.go
@@ -32,6 +32,9 @@ type TLS struct {
 
 	// CA represent the CA certificate environment variable key used to start server.
 	CA string `yaml:"ca" json:"ca"`
+
+	// InsecureSkipVerify represent enable/disable skip SSL certificate verification
+	InsecureSkipVerify bool `yaml:"insecure_skip_verify" json:"insecure_skip_verify"`
 }
 
 // Bind returns TLS object whose every value except Enabled is field value of environment value.
@@ -48,5 +51,6 @@ func (t *TLS) Opts() []tls.Option {
 		tls.WithCa(t.CA),
 		tls.WithCert(t.Cert),
 		tls.WithKey(t.Key),
+		tls.WithInsecureSkipVerify(t.InsecureSkipVerify),
 	}
 }
diff --git a/internal/config/tls_test.go b/internal/config/tls_test.go
index 4dff891df0..0f441a2ff8 100644
--- a/internal/config/tls_test.go
+++ b/internal/config/tls_test.go
@@ -179,6 +179,7 @@ func TestTLS_Opts(t *testing.T) {
 					tls.WithCa("ca"),
 					tls.WithCert("cert"),
 					tls.WithKey("key"),
+					tls.WithInsecureSkipVerify(false),
 				},
 			},
 		},
@@ -189,6 +190,7 @@ func TestTLS_Opts(t *testing.T) {
 					tls.WithCa(""),
 					tls.WithCert(""),
 					tls.WithKey(""),
+					tls.WithInsecureSkipVerify(false),
 				},
 			},
 		},
diff --git a/internal/db/nosql/cassandra/conviction.go b/internal/db/nosql/cassandra/conviction.go
index aa6f336ebc..ff1e57675e 100644
--- a/internal/db/nosql/cassandra/conviction.go
+++ b/internal/db/nosql/cassandra/conviction.go
@@ -37,5 +37,5 @@ func (c *convictionPolicy) AddFailure(err error, host *gocql.HostInfo) bool {
 
 // Reset clears the conviction state.
 func (c *convictionPolicy) Reset(host *gocql.HostInfo) {
-	log.Info("cassandra host %s reset detected\t%s", host.HostnameAndPort(), host.String())
+	log.Infof("cassandra host %s reset detected\t%s", host.HostnameAndPort(), host.String())
 }
diff --git a/internal/db/nosql/cassandra/option_test.go b/internal/db/nosql/cassandra/option_test.go
index e8fe3aaf00..9dc5c28484 100644
--- a/internal/db/nosql/cassandra/option_test.go
+++ b/internal/db/nosql/cassandra/option_test.go
@@ -182,7 +182,8 @@ func TestWithDialer(t *testing.T) {
 				},
 				want: want{
 					obj: &T{
-						dialer: dm,
+						dialer:    dm,
+						rawDialer: dm,
 					},
 				},
 			}
diff --git a/internal/net/tcp/dialer.go b/internal/net/tcp/dialer.go
index 55862fe97d..e732709285 100644
--- a/internal/net/tcp/dialer.go
+++ b/internal/net/tcp/dialer.go
@@ -201,7 +201,8 @@ func (d *dialer) cachedDialer(dctx context.Context, network, addr string) (conn
 		if dc, err := d.lookup(dctx, host); err == nil {
 			for i := uint32(0); i < dc.Len(); i++ {
 				hostIP := net.JoinHostPort(dc.IP(), port)
-				if conn, err := d.dial(dctx, network, hostIP); err == nil {
+				conn, err := d.dial(dctx, network, hostIP)
+				if err == nil && conn != nil {
 					return conn, nil
 				}
 				log.Debugf("failed to dial connection to %s\terror: %v", hostIP, err)
@@ -235,18 +236,28 @@ func (d *dialer) dial(ctx context.Context, network, addr string) (conn net.Conn,
 	return conn, nil
 }
 
-func (d *dialer) tlsHandshake(ctx context.Context, conn net.Conn, addr string) (tconn *tls.Conn, err error) {
-	tctx, cancel := context.WithTimeout(ctx, d.der.Timeout)
-	defer cancel()
+func (d *dialer) tlsHandshake(ctx context.Context, conn net.Conn, addr string) (*tls.Conn, error) {
+	var err error
 	if d.tlsConfig.ServerName == "" {
 		var host string
 		host, _, err = net.SplitHostPort(addr)
-		if err != nil {
+		if err == nil {
 			d.tlsConfig.ServerName = host
 		}
 	}
-	tconn = tls.Client(conn, d.tlsConfig)
+	tconn := tls.Client(conn, d.tlsConfig)
 	ech := make(chan error)
+	if d.eg == nil {
+		d.eg = errgroup.Get()
+	}
+	var tctx context.Context
+	if d.der.Timeout > 0 {
+		var cancel context.CancelFunc
+		tctx, cancel = context.WithTimeout(ctx, d.der.Timeout)
+		defer cancel()
+	} else {
+		tctx = ctx
+	}
 	d.eg.Go(safety.RecoverFunc(func() error {
 		defer close(ech)
 		select {
@@ -278,6 +289,16 @@ func (d *dialer) tlsHandshake(ctx context.Context, conn net.Conn, addr string) (
 		}(conn)
 		return nil, err
 	}
+	log.Debugf("tls handshake addr %s succeed from %s://%s to %s://%s,\tconnectionstate: [ Version:%s, ServerName: %s, HandshakeComplete: %v, DidResume: %v, NegotiatedProtocol: %s ]",
+		addr,
+		tconn.LocalAddr().Network(), tconn.LocalAddr().String(),
+		tconn.RemoteAddr().Network(), tconn.RemoteAddr().String(),
+		tconn.ConnectionState().Version,
+		tconn.ConnectionState().ServerName,
+		tconn.ConnectionState().HandshakeComplete,
+		tconn.ConnectionState().DidResume,
+		tconn.ConnectionState().NegotiatedProtocol,
+	)
 	return tconn, nil
 }
 
@@ -286,6 +307,6 @@ func (d *dialer) cacheExpireHook(ctx context.Context, addr string) {
 		_, err = d.lookup(ctx, addr)
 		return
 	})(); err != nil {
-		log.Errorf("DNS cacheExpireHook error occurred: %v\taddr:\t%s", err, addr)
+		log.Errorf("dns cacheExpireHook error occurred: %v\taddr:\t%s", err, addr)
 	}
 }
diff --git a/internal/net/tcp/dialer_test.go b/internal/net/tcp/dialer_test.go
index b9b361951b..953a91b89d 100644
--- a/internal/net/tcp/dialer_test.go
+++ b/internal/net/tcp/dialer_test.go
@@ -19,7 +19,6 @@ package tcp
 
 import (
 	"context"
-	"crypto/tls"
 	stderrors "errors"
 	"fmt"
 	"io/ioutil"
@@ -38,9 +37,11 @@ import (
 	"github.com/google/go-cmp/cmp/cmpopts"
 	"github.com/vdaas/vald/internal/cache"
 	"github.com/vdaas/vald/internal/cache/gache"
+	"github.com/vdaas/vald/internal/errgroup"
 	"github.com/vdaas/vald/internal/errors"
 	"github.com/vdaas/vald/internal/log"
 	"github.com/vdaas/vald/internal/net"
+	"github.com/vdaas/vald/internal/tls"
 	"go.uber.org/goleak"
 )
 
@@ -263,7 +264,7 @@ func TestNewDialer(t *testing.T) {
 		got := gotDer.(*dialer)
 		opts := []cmp.Option{
 			cmp.AllowUnexported(*want),
-			cmpopts.IgnoreFields(*want, "dialer", "der", "addrs"),
+			cmpopts.IgnoreFields(*want, "dialer", "der", "addrs", "eg"),
 			cmp.Comparer(func(x, y cache.Cache) bool {
 				if x == nil && y == nil {
 					return true
@@ -289,10 +290,11 @@ func TestNewDialer(t *testing.T) {
 	tests := []test{
 		func() test {
 			d := &net.Dialer{
-				Timeout:   time.Second * 30,
-				KeepAlive: time.Second * 30,
-				DualStack: true,
-				Control:   Control,
+				Timeout:       0,
+				KeepAlive:     time.Second * 30,
+				FallbackDelay: time.Millisecond * 300,
+				DualStack:     true,
+				Control:       Control,
 			}
 			d.Resolver = &net.Resolver{
 				PreferGo: false,
@@ -303,11 +305,13 @@ func TestNewDialer(t *testing.T) {
 				name: "returns dialer when option is empty",
 				want: want{
 					wantDer: &dialer{
-						dialerKeepAlive: time.Second * 30,
-						dialerTimeout:   time.Second * 30,
-						dialerDualStack: true,
-						der:             d,
-						dialer:          d.DialContext,
+						dialerKeepAlive:     time.Second * 30,
+						dialerTimeout:       0,
+						dialerFallbackDelay: time.Millisecond * 300,
+						dialerDualStack:     true,
+						der:                 d,
+						dialer:              d.DialContext,
+						eg:                  errgroup.Get(),
 					},
 				},
 			}
@@ -339,7 +343,8 @@ func TestNewDialer(t *testing.T) {
 				want: want{
 					wantDer: &dialer{
 						dialerKeepAlive:       time.Second * 30,
-						dialerTimeout:         time.Second * 30,
+						dialerTimeout:         0,
+						dialerFallbackDelay:   time.Millisecond * 300,
 						dnsRefreshDuration:    time.Second * 5,
 						dnsCacheExpiration:    time.Second * 10,
 						dnsRefreshDurationStr: "5s",
@@ -974,7 +979,7 @@ func Test_dialer_cachedDialer(t *testing.T) {
 			args: args{
 				dctx:    context.Background(),
 				network: "tcp",
-				addr:    "google.com:80",
+				addr:    "google.com:443",
 			},
 			fields: fields{
 				der: &net.Dialer{
@@ -1075,25 +1080,27 @@ func Test_dialer_cachedDialer(t *testing.T) {
 			srv := httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 				w.WriteHeader(200)
 			}))
-
 			host, port, _ := net.SplitHostPort(srv.URL[len("https://"):])
 
-			addr := "invalid_ip"
-
+			addr := host + ":" + strconv.FormatUint(uint64(port), 10)
 			// set the hostname 'invalid_ip' to the host name of the cache with the test server ip address
-			cache, _ := cache.New()
+			cache, err := cache.New()
+			if err != nil {
+				t.Error(err)
+			}
 			cache.Set(addr, &dialerCache{
 				ips: []string{
 					host,
 				},
 			})
+			tcfg, _ := tls.NewClientConfig(tls.WithInsecureSkipVerify(true))
 
 			return test{
 				name: "return cached ip tls connection",
 				args: args{
 					dctx:    context.Background(),
 					network: "tcp",
-					addr:    addr + ":" + strconv.FormatUint(uint64(port), 10),
+					addr:    addr,
 				},
 				fields: fields{
 					der: &net.Dialer{
@@ -1101,13 +1108,14 @@ func Test_dialer_cachedDialer(t *testing.T) {
 							PreferGo: false,
 						},
 					},
-					cache:     cache,
-					dnsCache:  true,
-					tlsConfig: new(tls.Config),
+					cache:    cache,
+					dnsCache: true,
+					// tlsConfig: srv.Config.TLSConfig,
+					tlsConfig: tcfg,
 				},
 				checkFunc: func(d *dialer, w want, gotConn net.Conn, err error) error {
 					if err != nil {
-						return errors.New("err is not nil")
+						return errors.Wrap(err, "err is not nil")
 					}
 					if gotConn == nil {
 						return errors.New("conn is nil")
@@ -1396,6 +1404,7 @@ func Test_dialer_cachedDialer(t *testing.T) {
 				dialerDualStack:       test.fields.dialerDualStack,
 				der:                   test.fields.der,
 				dialer:                test.fields.dialer,
+				eg:                    errgroup.Get(),
 			}
 
 			gotConn, gotErr := d.cachedDialer(test.args.dctx, test.args.network, test.args.addr)
@@ -1460,7 +1469,7 @@ func Test_dialer_dial(t *testing.T) {
 			args: args{
 				ctx:     context.Background(),
 				network: "tcp",
-				addr:    "google.com:80",
+				addr:    "google.com:443",
 			},
 			fields: fields{
 				tlsConfig: new(tls.Config),
@@ -1600,6 +1609,7 @@ func Test_dialer_dial(t *testing.T) {
 			d := &dialer{
 				tlsConfig: test.fields.tlsConfig,
 				der:       test.fields.der,
+				eg:        errgroup.Get(),
 			}
 
 			got, err := d.dial(test.args.ctx, test.args.network, test.args.addr)
diff --git a/internal/safety/safety.go b/internal/safety/safety.go
index 010c90a3fb..e9f8121cf3 100644
--- a/internal/safety/safety.go
+++ b/internal/safety/safety.go
@@ -39,7 +39,7 @@ func recoverFunc(fn func() error, withPanic bool) func() error {
 		defer func() {
 			if r := recover(); r != nil {
 				stack := string(debug.Stack())
-				log.Warn("recovered: %+v\nstacktrace:\n%s", r, stack)
+				log.Warnf("recovered: %+v\nstacktrace:\n%s", r, stack)
 				switch x := r.(type) {
 				case runtime.Error:
 					err = errors.ErrRuntimeError(err, x)
diff --git a/internal/tls/option.go b/internal/tls/option.go
index 8c63a6b2dd..06b07e11cb 100644
--- a/internal/tls/option.go
+++ b/internal/tls/option.go
@@ -23,6 +23,7 @@ type Option func(*credentials) error
 
 var defaultOptions = func() []Option {
 	return []Option{
+		WithInsecureSkipVerify(false),
 		WithTLSConfig(&tls.Config{
 			MinVersion: tls.VersionTLS12,
 			NextProtos: []string{
@@ -96,3 +97,10 @@ func WithTLSConfig(cfg *tls.Config) Option {
 		return nil
 	}
 }
+
+func WithInsecureSkipVerify(insecure bool) Option {
+	return func(c *credentials) error {
+		c.insecure = insecure
+		return nil
+	}
+}
diff --git a/internal/tls/option_test.go b/internal/tls/option_test.go
index 880844112a..e0d18098e4 100644
--- a/internal/tls/option_test.go
+++ b/internal/tls/option_test.go
@@ -325,3 +325,78 @@ func TestWithTLSConfig(t *testing.T) {
 		})
 	}
 }
+
+func TestWithInsecureSkipVerify(t *testing.T) {
+	type T = credentials
+	type args struct {
+		insecure bool
+	}
+	type want struct {
+		obj *T
+		err error
+	}
+	type test struct {
+		name       string
+		args       args
+		want       want
+		checkFunc  func(want, *T, error) error
+		beforeFunc func(args)
+		afterFunc  func(args)
+	}
+
+	defaultCheckFunc := func(w want, obj *T, err error) error {
+		if !errors.Is(err, w.err) {
+			return errors.Errorf("got_error: \"%#v\",\n\t\t\t\twant: \"%#v\"", err, w.err)
+		}
+		if !reflect.DeepEqual(obj, w.obj) {
+			return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", obj, w.obj)
+		}
+		return nil
+	}
+	tests := []test{
+		{
+			name: "InsecureSkipVerify is true",
+			args: args{
+				insecure: true,
+			},
+			want: want{
+				obj: &T{
+					insecure: true,
+				},
+			},
+		},
+		{
+			name: "InsecureSkipVerify is false",
+			args: args{
+				insecure: false,
+			},
+			want: want{
+				obj: &T{
+					insecure: false,
+				},
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(tt *testing.T) {
+			defer goleak.VerifyNone(tt, goleakIgnoreOptions...)
+			if test.beforeFunc != nil {
+				test.beforeFunc(test.args)
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc(test.args)
+			}
+
+			if test.checkFunc == nil {
+				test.checkFunc = defaultCheckFunc
+			}
+
+			got := WithInsecureSkipVerify(test.args.insecure)
+			obj := new(T)
+			if err := test.checkFunc(test.want, obj, got(obj)); err != nil {
+				tt.Errorf("error = %v", err)
+			}
+		})
+	}
+}
diff --git a/internal/tls/tls.go b/internal/tls/tls.go
index a76fda3104..38ed1e47f9 100644
--- a/internal/tls/tls.go
+++ b/internal/tls/tls.go
@@ -29,10 +29,11 @@ import (
 type Config = tls.Config
 
 type credentials struct {
-	cfg  *tls.Config
-	cert string
-	key  string
-	ca   string
+	cfg      *tls.Config
+	cert     string
+	key      string
+	ca       string
+	insecure bool
 }
 
 // NewTLSConfig returns a *tls.Config struct or error
@@ -40,13 +41,9 @@ type credentials struct {
 // This function initialize TLS configuration, for example the CA certificate and key to start TLS server.
 // Server and CA Certificate, and private key will read from a file from the file path definied in environment variable.
 func New(opts ...Option) (*Config, error) {
-	var err error
-	c := new(credentials)
-
-	for _, opt := range append(defaultOptions(), opts...) {
-		if err := opt(c); err != nil {
-			return nil, errors.ErrOptionFailed(err, reflect.ValueOf(opt))
-		}
+	c, err := newCredential(opts...)
+	if err != nil {
+		return nil, err
 	}
 
 	if c.cert == "" || c.key == "" {
@@ -72,13 +69,9 @@ func New(opts ...Option) (*Config, error) {
 }
 
 func NewClientConfig(opts ...Option) (*Config, error) {
-	var err error
-	c := new(credentials)
-
-	for _, opt := range append(defaultOptions(), opts...) {
-		if err := opt(c); err != nil {
-			return nil, errors.ErrOptionFailed(err, reflect.ValueOf(opt))
-		}
+	c, err := newCredential(opts...)
+	if err != nil {
+		return nil, err
 	}
 
 	if c.ca != "" {
@@ -118,3 +111,15 @@ func NewX509CertPool(path string) (pool *x509.CertPool, err error) {
 	}
 	return pool, err
 }
+
+func newCredential(opts ...Option) (c *credentials, err error) {
+	c = new(credentials)
+
+	for _, opt := range append(defaultOptions(), opts...) {
+		if err := opt(c); err != nil {
+			return nil, errors.ErrOptionFailed(err, reflect.ValueOf(opt))
+		}
+	}
+	c.cfg.InsecureSkipVerify = c.insecure
+	return c, nil
+}
diff --git a/pkg/gateway/meta/handler/grpc/handler.go b/pkg/gateway/meta/handler/grpc/handler.go
index e4ccaeb7aa..06dd18b2c2 100644
--- a/pkg/gateway/meta/handler/grpc/handler.go
+++ b/pkg/gateway/meta/handler/grpc/handler.go
@@ -169,7 +169,7 @@ func (s *server) SearchByID(ctx context.Context, req *payload.Search_IDRequest)
 				Owner:        errdetails.ValdResourceOwner,
 				Description:  err.Error(),
 			}, info.Get())
-		log.Error("SearchByID API failed to process request uuids:\t%v\terror:\t%s", meta, err.Error())
+		log.Errorf("SearchByID API failed to process request uuids:\t%v\terror:\t%s", meta, err.Error())
 		if span != nil {
 			span.SetStatus(trace.StatusCodeNotFound(err.Error()))
 		}

From 58d6c073a26d640212865a6cf797996baa199a75 Mon Sep 17 00:00:00 2001
From: kpango <kpango@vdaas.org>
Date: Sat, 6 Feb 2021 06:58:45 +0900
Subject: [PATCH 05/22] bugfix

Signed-off-by: kpango <kpango@vdaas.org>
---
 internal/k8s/reconciler.go                 |  12 ++
 pkg/agent/core/ngt/handler/grpc/handler.go |   2 +-
 pkg/gateway/backup/handler/grpc/handler.go |   2 +-
 pkg/gateway/filter/handler/grpc/handler.go | 175 ++++++++++++++++++---
 pkg/gateway/lb/handler/grpc/handler.go     |   2 +-
 pkg/gateway/meta/handler/grpc/handler.go   |   2 +-
 6 files changed, 165 insertions(+), 30 deletions(-)

diff --git a/internal/k8s/reconciler.go b/internal/k8s/reconciler.go
index bdb25a116c..a5deb7549b 100644
--- a/internal/k8s/reconciler.go
+++ b/internal/k8s/reconciler.go
@@ -32,6 +32,11 @@ import (
 	"sigs.k8s.io/controller-runtime/pkg/manager"
 	"sigs.k8s.io/controller-runtime/pkg/reconcile"
 	"sigs.k8s.io/controller-runtime/pkg/source"
+
+	"k8s.io/client-go/rest"
+
+	"sigs.k8s.io/controller-runtime/pkg/cache"
+	"sigs.k8s.io/controller-runtime/pkg/client"
 )
 
 type Controller interface {
@@ -72,6 +77,13 @@ func New(opts ...Option) (cl Controller, err error) {
 		if cfg == nil {
 			return nil, errors.ErrInvalidReconcilerConfig
 		}
+		cb := manager.NewClientBuilder()
+		rc := &rest.Config{}
+		cc, err := cache.New(rc, cache.Options{})
+		if err != nil {
+			return nil, err
+		}
+		cb.Build(cc, rc, client.Options{})
 		c.mgr, err = manager.New(
 			cfg,
 			manager.Options{
diff --git a/pkg/agent/core/ngt/handler/grpc/handler.go b/pkg/agent/core/ngt/handler/grpc/handler.go
index 7a3263e287..6f1ee39723 100644
--- a/pkg/agent/core/ngt/handler/grpc/handler.go
+++ b/pkg/agent/core/ngt/handler/grpc/handler.go
@@ -990,7 +990,7 @@ func (s *server) StreamGetObject(stream vald.Object_StreamGetObjectServer) (err
 		}
 	}()
 	err = grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
-		func() interface{} { return new(payload.Object_ID) },
+		func() interface{} { return new(payload.Object_VectorRequest) },
 		func(ctx context.Context, data interface{}) (interface{}, error) {
 			req := data.(*payload.Object_VectorRequest)
 			ctx, sspan := trace.StartSpan(ctx, apiName+".StreamGetObject/id-"+req.GetId().GetId())
diff --git a/pkg/gateway/backup/handler/grpc/handler.go b/pkg/gateway/backup/handler/grpc/handler.go
index 6b4913e6d0..b5bb642b2b 100644
--- a/pkg/gateway/backup/handler/grpc/handler.go
+++ b/pkg/gateway/backup/handler/grpc/handler.go
@@ -1492,7 +1492,7 @@ func (s *server) StreamGetObject(stream vald.Object_StreamGetObjectServer) (err
 		}
 	}()
 	err = grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
-		func() interface{} { return new(payload.Object_ID) },
+		func() interface{} { return new(payload.Object_VectorRequest) },
 		func(ctx context.Context, data interface{}) (interface{}, error) {
 			req := data.(*payload.Object_VectorRequest)
 			ctx, sspan := trace.StartSpan(ctx, apiName+".StreamGetObject/id-"+req.GetId().GetId())
diff --git a/pkg/gateway/filter/handler/grpc/handler.go b/pkg/gateway/filter/handler/grpc/handler.go
index 5968ed08f7..014fce8165 100644
--- a/pkg/gateway/filter/handler/grpc/handler.go
+++ b/pkg/gateway/filter/handler/grpc/handler.go
@@ -157,7 +157,7 @@ func (s *server) StreamSearchObject(stream vald.Filter_StreamSearchObjectServer)
 		}
 	}()
 	return grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
-		func() interface{} { return new(payload.Search_IDRequest) },
+		func() interface{} { return new(payload.Search_ObjectRequest) },
 		func(ctx context.Context, data interface{}) (interface{}, error) {
 			res, err := s.SearchObject(ctx, data.(*payload.Search_ObjectRequest))
 			if err != nil {
@@ -226,9 +226,10 @@ func (s *server) StreamInsertObject(stream vald.Filter_StreamInsertObjectServer)
 		}
 	}()
 	return grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
-		func() interface{} { return new(payload.Search_IDRequest) },
+		func() interface{} { return new(payload.Insert_ObjectRequest) },
 		func(ctx context.Context, data interface{}) (interface{}, error) {
-			loc, err := s.InsertObject(ctx, data.(*payload.Insert_ObjectRequest))
+			req := data.(*payload.Insert_ObjectRequest)
+			loc, err := s.InsertObject(ctx, req)
 			if err != nil {
 				st, ok := status.FromError(err)
 				if !ok {
@@ -341,7 +342,7 @@ func (s *server) StreamUpdateObject(stream vald.Filter_StreamUpdateObjectServer)
 		}
 	}()
 	return grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
-		func() interface{} { return new(payload.Search_IDRequest) },
+		func() interface{} { return new(payload.Update_ObjectRequest) },
 		func(ctx context.Context, data interface{}) (interface{}, error) {
 			loc, err := s.UpdateObject(ctx, data.(*payload.Update_ObjectRequest))
 			if err != nil {
@@ -455,7 +456,7 @@ func (s *server) StreamUpsertObject(stream vald.Filter_StreamUpsertObjectServer)
 		}
 	}()
 	return grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
-		func() interface{} { return new(payload.Search_IDRequest) },
+		func() interface{} { return new(payload.Upsert_ObjectRequest) },
 		func(ctx context.Context, data interface{}) (interface{}, error) {
 			loc, err := s.UpsertObject(ctx, data.(*payload.Upsert_ObjectRequest))
 			if err != nil {
@@ -618,14 +619,14 @@ func (s *server) SearchByID(ctx context.Context, req *payload.Search_IDRequest)
 	return res, nil
 }
 
-func (s *server) StreamSearch(stream vald.Search_StreamSearchServer) error {
+func (s *server) StreamSearch(stream vald.Search_StreamSearchServer) (err error) {
 	ctx, span := trace.StartSpan(stream.Context(), apiName+".StreamSearch")
 	defer func() {
 		if span != nil {
 			span.End()
 		}
 	}()
-	return grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
+	err = grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
 		func() interface{} { return new(payload.Search_Request) },
 		func(ctx context.Context, data interface{}) (interface{}, error) {
 			res, err := s.Search(ctx, data.(*payload.Search_Request))
@@ -647,25 +648,44 @@ func (s *server) StreamSearch(stream vald.Search_StreamSearchServer) error {
 				},
 			}, nil
 		})
+
+	if err != nil {
+		if span != nil {
+			span.SetStatus(trace.StatusCodeInternal(err.Error()))
+		}
+		log.Error(err)
+		return err
+	}
+	return nil
 }
 
-func (s *server) StreamSearchByID(stream vald.Search_StreamSearchByIDServer) error {
+func (s *server) StreamSearchByID(stream vald.Search_StreamSearchByIDServer) (err error) {
 	ctx, span := trace.StartSpan(stream.Context(), apiName+".StreamSearchByID")
 	defer func() {
 		if span != nil {
 			span.End()
 		}
 	}()
-	return grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
+	err = grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
 		func() interface{} { return new(payload.Search_IDRequest) },
 		func(ctx context.Context, data interface{}) (interface{}, error) {
-			res, err := s.SearchByID(ctx, data.(*payload.Search_IDRequest))
+			req := data.(*payload.Search_IDRequest)
+			ctx, sspan := trace.StartSpan(ctx, apiName+".StreamSearchByID/id-"+req.GetId())
+			defer func() {
+				if sspan != nil {
+					sspan.End()
+				}
+			}()
+			res, err := s.SearchByID(ctx, req)
 			if err != nil {
 				st, ok := status.FromError(err)
 				if !ok {
 					st = status.New(codes.Internal, errors.Wrap(err, "failed to parse grpc status from error").Error())
 					err = errors.Wrap(st.Err(), err.Error())
 				}
+				if sspan != nil {
+					sspan.SetStatus(trace.StatusCodeInternal(err.Error()))
+				}
 				return &payload.Search_StreamResponse{
 					Payload: &payload.Search_StreamResponse_Status{
 						Status: st.Proto(),
@@ -678,6 +698,14 @@ func (s *server) StreamSearchByID(stream vald.Search_StreamSearchByIDServer) err
 				},
 			}, nil
 		})
+	if err != nil {
+		if span != nil {
+			span.SetStatus(trace.StatusCodeInternal(err.Error()))
+		}
+		log.Error(err)
+		return err
+	}
+	return nil
 }
 
 func (s *server) MultiSearch(ctx context.Context, reqs *payload.Search_MultiRequest) (res *payload.Search_Responses, errs error) {
@@ -834,23 +862,33 @@ func (s *server) Insert(ctx context.Context, req *payload.Insert_Request) (loc *
 	return loc, nil
 }
 
-func (s *server) StreamInsert(stream vald.Insert_StreamInsertServer) error {
+func (s *server) StreamInsert(stream vald.Insert_StreamInsertServer) (err error) {
 	ctx, span := trace.StartSpan(stream.Context(), apiName+".StreamInsert")
 	defer func() {
 		if span != nil {
 			span.End()
 		}
 	}()
-	return grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
+	err = grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
 		func() interface{} { return new(payload.Insert_Request) },
 		func(ctx context.Context, data interface{}) (interface{}, error) {
-			res, err := s.Insert(ctx, data.(*payload.Insert_Request))
+			req := data.(*payload.Insert_Request)
+			ctx, sspan := trace.StartSpan(ctx, apiName+".StreamInsert/id-"+req.GetVector().GetId())
+			defer func() {
+				if sspan != nil {
+					sspan.End()
+				}
+			}()
+			res, err := s.Insert(ctx, req)
 			if err != nil {
 				st, ok := status.FromError(err)
 				if !ok {
 					st = status.New(codes.Internal, errors.Wrap(err, "failed to parse grpc status from error").Error())
 					err = errors.Wrap(st.Err(), err.Error())
 				}
+				if sspan != nil {
+					sspan.SetStatus(trace.StatusCodeInternal(err.Error()))
+				}
 				return &payload.Object_StreamLocation{
 					Payload: &payload.Object_StreamLocation_Status{
 						Status: st.Proto(),
@@ -863,6 +901,15 @@ func (s *server) StreamInsert(stream vald.Insert_StreamInsertServer) error {
 				},
 			}, nil
 		})
+
+	if err != nil {
+		if span != nil {
+			span.SetStatus(trace.StatusCodeInternal(err.Error()))
+		}
+		log.Error(err)
+		return err
+	}
+	return nil
 }
 
 func (s *server) MultiInsert(ctx context.Context, reqs *payload.Insert_MultiRequest) (locs *payload.Object_Locations, errs error) {
@@ -975,23 +1022,33 @@ func (s *server) Update(ctx context.Context, req *payload.Update_Request) (loc *
 	return loc, nil
 }
 
-func (s *server) StreamUpdate(stream vald.Update_StreamUpdateServer) error {
+func (s *server) StreamUpdate(stream vald.Update_StreamUpdateServer) (err error) {
 	ctx, span := trace.StartSpan(stream.Context(), apiName+".StreamUpdate")
 	defer func() {
 		if span != nil {
 			span.End()
 		}
 	}()
-	return grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
+	err = grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
 		func() interface{} { return new(payload.Update_Request) },
 		func(ctx context.Context, data interface{}) (interface{}, error) {
-			res, err := s.Update(ctx, data.(*payload.Update_Request))
+			req := data.(*payload.Update_Request)
+			ctx, sspan := trace.StartSpan(ctx, apiName+".StreamUpdate/id-"+req.GetVector().GetId())
+			defer func() {
+				if sspan != nil {
+					sspan.End()
+				}
+			}()
+			res, err := s.Update(ctx, req)
 			if err != nil {
 				st, ok := status.FromError(err)
 				if !ok {
 					st = status.New(codes.Internal, errors.Wrap(err, "failed to parse grpc status from error").Error())
 					err = errors.Wrap(st.Err(), err.Error())
 				}
+				if sspan != nil {
+					sspan.SetStatus(trace.StatusCodeInternal(err.Error()))
+				}
 				return &payload.Object_StreamLocation{
 					Payload: &payload.Object_StreamLocation_Status{
 						Status: st.Proto(),
@@ -1004,6 +1061,15 @@ func (s *server) StreamUpdate(stream vald.Update_StreamUpdateServer) error {
 				},
 			}, nil
 		})
+
+	if err != nil {
+		if span != nil {
+			span.SetStatus(trace.StatusCodeInternal(err.Error()))
+		}
+		log.Error(err)
+		return err
+	}
+	return nil
 }
 
 func (s *server) MultiUpdate(ctx context.Context, reqs *payload.Update_MultiRequest) (locs *payload.Object_Locations, errs error) {
@@ -1116,23 +1182,33 @@ func (s *server) Upsert(ctx context.Context, req *payload.Upsert_Request) (loc *
 	return loc, nil
 }
 
-func (s *server) StreamUpsert(stream vald.Upsert_StreamUpsertServer) error {
+func (s *server) StreamUpsert(stream vald.Upsert_StreamUpsertServer) (err error) {
 	ctx, span := trace.StartSpan(stream.Context(), apiName+".StreamUpsert")
 	defer func() {
 		if span != nil {
 			span.End()
 		}
 	}()
-	return grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
+	err = grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
 		func() interface{} { return new(payload.Upsert_Request) },
 		func(ctx context.Context, data interface{}) (interface{}, error) {
-			res, err := s.Upsert(ctx, data.(*payload.Upsert_Request))
+			req := data.(*payload.Upsert_Request)
+			ctx, sspan := trace.StartSpan(ctx, apiName+".StreamUpsert/id-"+req.GetVector().GetId())
+			defer func() {
+				if sspan != nil {
+					sspan.End()
+				}
+			}()
+			res, err := s.Upsert(ctx, req)
 			if err != nil {
 				st, ok := status.FromError(err)
 				if !ok {
 					st = status.New(codes.Internal, errors.Wrap(err, "failed to parse grpc status from error").Error())
 					err = errors.Wrap(st.Err(), err.Error())
 				}
+				if sspan != nil {
+					sspan.SetStatus(trace.StatusCodeInternal(err.Error()))
+				}
 				return &payload.Object_StreamLocation{
 					Payload: &payload.Object_StreamLocation_Status{
 						Status: st.Proto(),
@@ -1145,6 +1221,15 @@ func (s *server) StreamUpsert(stream vald.Upsert_StreamUpsertServer) error {
 				},
 			}, nil
 		})
+
+	if err != nil {
+		if span != nil {
+			span.SetStatus(trace.StatusCodeInternal(err.Error()))
+		}
+		log.Error(err)
+		return err
+	}
+	return nil
 }
 
 func (s *server) MultiUpsert(ctx context.Context, reqs *payload.Upsert_MultiRequest) (locs *payload.Object_Locations, errs error) {
@@ -1201,23 +1286,33 @@ func (s *server) Remove(ctx context.Context, req *payload.Remove_Request) (loc *
 	return s.gateway.Remove(ctx, req, s.copts...)
 }
 
-func (s *server) StreamRemove(stream vald.Remove_StreamRemoveServer) error {
+func (s *server) StreamRemove(stream vald.Remove_StreamRemoveServer) (err error) {
 	ctx, span := trace.StartSpan(stream.Context(), apiName+".StreamRemove")
 	defer func() {
 		if span != nil {
 			span.End()
 		}
 	}()
-	return grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
+	err = grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
 		func() interface{} { return new(payload.Remove_Request) },
 		func(ctx context.Context, data interface{}) (interface{}, error) {
-			res, err := s.Remove(ctx, data.(*payload.Remove_Request))
+			req := data.(*payload.Remove_Request)
+			ctx, sspan := trace.StartSpan(ctx, apiName+".StreamRemove/id-"+req.GetId().GetId())
+			defer func() {
+				if sspan != nil {
+					sspan.End()
+				}
+			}()
+			res, err := s.Remove(ctx, req)
 			if err != nil {
 				st, ok := status.FromError(err)
 				if !ok {
 					st = status.New(codes.Internal, errors.Wrap(err, "failed to parse grpc status from error").Error())
 					err = errors.Wrap(st.Err(), err.Error())
 				}
+				if sspan != nil {
+					sspan.SetStatus(trace.StatusCodeInternal(err.Error()))
+				}
 				return &payload.Object_StreamLocation{
 					Payload: &payload.Object_StreamLocation_Status{
 						Status: st.Proto(),
@@ -1230,6 +1325,15 @@ func (s *server) StreamRemove(stream vald.Remove_StreamRemoveServer) error {
 				},
 			}, nil
 		})
+
+	if err != nil {
+		if span != nil {
+			span.SetStatus(trace.StatusCodeInternal(err.Error()))
+		}
+		log.Error(err)
+		return err
+	}
+	return nil
 }
 
 func (s *server) MultiRemove(ctx context.Context, reqs *payload.Remove_MultiRequest) (locs *payload.Object_Locations, errs error) {
@@ -1309,23 +1413,33 @@ func (s *server) GetObject(ctx context.Context, req *payload.Object_VectorReques
 	return vec, nil
 }
 
-func (s *server) StreamGetObject(stream vald.Object_StreamGetObjectServer) error {
+func (s *server) StreamGetObject(stream vald.Object_StreamGetObjectServer) (err error) {
 	ctx, span := trace.StartSpan(stream.Context(), apiName+".StreamGetObject")
 	defer func() {
 		if span != nil {
 			span.End()
 		}
 	}()
-	return grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
-		func() interface{} { return new(payload.Object_ID) },
+	err = grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
+		func() interface{} { return new(payload.Object_VectorRequest) },
 		func(ctx context.Context, data interface{}) (interface{}, error) {
-			res, err := s.GetObject(ctx, data.(*payload.Object_VectorRequest))
+			req := data.(*payload.Object_VectorRequest)
+			ctx, sspan := trace.StartSpan(ctx, apiName+".StreamGetObject/id-"+req.GetId().GetId())
+			defer func() {
+				if sspan != nil {
+					sspan.End()
+				}
+			}()
+			res, err := s.GetObject(ctx, req)
 			if err != nil {
 				st, ok := status.FromError(err)
 				if !ok {
 					st = status.New(codes.Internal, errors.Wrap(err, "failed to parse grpc status from error").Error())
 					err = errors.Wrap(st.Err(), err.Error())
 				}
+				if sspan != nil {
+					sspan.SetStatus(trace.StatusCodeInternal(err.Error()))
+				}
 				return &payload.Object_StreamVector{
 					Payload: &payload.Object_StreamVector_Status{
 						Status: st.Proto(),
@@ -1338,4 +1452,13 @@ func (s *server) StreamGetObject(stream vald.Object_StreamGetObjectServer) error
 				},
 			}, nil
 		})
+
+	if err != nil {
+		if span != nil {
+			span.SetStatus(trace.StatusCodeInternal(err.Error()))
+		}
+		log.Error(err)
+		return err
+	}
+	return nil
 }
diff --git a/pkg/gateway/lb/handler/grpc/handler.go b/pkg/gateway/lb/handler/grpc/handler.go
index 2ffff14b38..6f1fa513fc 100644
--- a/pkg/gateway/lb/handler/grpc/handler.go
+++ b/pkg/gateway/lb/handler/grpc/handler.go
@@ -1827,7 +1827,7 @@ func (s *server) StreamGetObject(stream vald.Object_StreamGetObjectServer) (err
 		}
 	}()
 	err = grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
-		func() interface{} { return new(payload.Object_ID) },
+		func() interface{} { return new(payload.Object_VectorRequest) },
 		func(ctx context.Context, data interface{}) (interface{}, error) {
 			req := data.(*payload.Object_VectorRequest)
 			ctx, sspan := trace.StartSpan(ctx, apiName+".StreamGetObject/id-"+req.GetId().GetId())
diff --git a/pkg/gateway/meta/handler/grpc/handler.go b/pkg/gateway/meta/handler/grpc/handler.go
index 06dd18b2c2..fabf0b064f 100644
--- a/pkg/gateway/meta/handler/grpc/handler.go
+++ b/pkg/gateway/meta/handler/grpc/handler.go
@@ -1571,7 +1571,7 @@ func (s *server) StreamGetObject(stream vald.Object_StreamGetObjectServer) (err
 		}
 	}()
 	err = grpc.BidirectionalStream(ctx, stream, s.streamConcurrency,
-		func() interface{} { return new(payload.Object_ID) },
+		func() interface{} { return new(payload.Object_VectorRequest) },
 		func(ctx context.Context, data interface{}) (interface{}, error) {
 			req := data.(*payload.Object_VectorRequest)
 			ctx, sspan := trace.StartSpan(ctx, apiName+".StreamGetObject/id-"+req.GetId().GetId())

From ccb25cbd1b2f6b18e4b3b9d9c5c33d0fd0794bc1 Mon Sep 17 00:00:00 2001
From: kpango <kpango@vdaas.org>
Date: Sat, 6 Feb 2021 07:38:55 +0900
Subject: [PATCH 06/22] add custom connection dialer to k8s

Signed-off-by: kpango <kpango@vdaas.org>
---
 charts/vald/values.schema.json           |  2 +-
 charts/vald/values.yaml                  | 33 ++++++++++++++++++++++++
 internal/config/discoverer.go            |  6 +++++
 internal/k8s/option.go                   | 10 +++++++
 internal/k8s/reconciler.go               | 21 ++++++++++-----
 internal/net/tcp/dialer.go               |  5 +++-
 k8s/agent/configmap.yaml                 |  1 +
 k8s/discoverer/configmap.yaml            | 16 ++++++++++++
 k8s/discoverer/deployment.yaml           |  2 +-
 k8s/gateway/backup/configmap.yaml        |  5 ++++
 k8s/gateway/backup/deployment.yaml       |  2 +-
 k8s/gateway/lb/configmap.yaml            |  5 ++++
 k8s/gateway/lb/deployment.yaml           |  2 +-
 k8s/gateway/meta/configmap.yaml          |  5 ++++
 k8s/gateway/meta/deployment.yaml         |  2 +-
 k8s/manager/backup/configmap.yaml        |  3 +++
 k8s/manager/backup/deployment.yaml       |  2 +-
 k8s/manager/compressor/configmap.yaml    |  5 ++++
 k8s/manager/compressor/deployment.yaml   |  2 +-
 k8s/manager/index/configmap.yaml         |  5 ++++
 k8s/manager/index/deployment.yaml        |  2 +-
 k8s/meta/configmap.yaml                  |  3 +++
 k8s/meta/deployment.yaml                 |  2 +-
 pkg/discoverer/k8s/service/discover.go   |  3 +++
 pkg/discoverer/k8s/service/option.go     | 10 +++++++
 pkg/discoverer/k8s/usecase/discovered.go | 11 ++++++++
 26 files changed, 149 insertions(+), 16 deletions(-)

diff --git a/charts/vald/values.schema.json b/charts/vald/values.schema.json
index a2e7865413..bba3e6ced3 100644
--- a/charts/vald/values.schema.json
+++ b/charts/vald/values.schema.json
@@ -1 +1 @@
-{"$schema":"http://json-schema.org/draft-07/schema#","title":"Values","type":"object","properties":{"agent":{"type":"object","properties":{"affinity":{"type":"object","properties":{"nodeAffinity":{"type":"object","properties":{"preferredDuringSchedulingIgnoredDuringExecution":{"type":"array","items":{"type":"object"}},"requiredDuringSchedulingIgnoredDuringExecution":{"type":"object","properties":{"nodeSelectorTerms":{"type":"array","items":{"type":"object"}}}}}},"podAffinity":{"type":"object","properties":{"preferredDuringSchedulingIgnoredDuringExecution":{"type":"array","items":{"type":"object"}},"requiredDuringSchedulingIgnoredDuringExecution":{"type":"array","items":{"type":"object"}}}},"podAntiAffinity":{"type":"object","properties":{"preferredDuringSchedulingIgnoredDuringExecution":{"type":"array","items":{"type":"object"}},"requiredDuringSchedulingIgnoredDuringExecution":{"type":"array","items":{"type":"object"}}}}}},"annotations":{"type":"object"},"enabled":{"type":"boolean"},"env":{"type":"array","items":{"type":"object"}},"externalTrafficPolicy":{"type":"string"},"hpa":{"type":"object","properties":{"enabled":{"type":"boolean"},"targetCPUUtilizationPercentage":{"type":"integer"}}},"image":{"type":"object","properties":{"pullPolicy":{"type":"string","enum":["Always","Never","IfNotPresent"]},"repository":{"type":"string"},"tag":{"type":"string"}}},"initContainers":{"type":"array","items":{"type":"object"}},"kind":{"type":"string","enum":["StatefulSet","Deployment","DaemonSet"]},"logging":{"type":"object","properties":{"format":{"type":"string","enum":["raw","json"]},"level":{"type":"string","enum":["debug","info","warn","error","fatal"]},"logger":{"type":"string","enum":["glg"]}}},"maxReplicas":{"type":"integer","minimum":0},"maxUnavailable":{"type":"string"},"minReplicas":{"type":"integer","minimum":0},"name":{"type":"string"},"ngt":{"type":"object","properties":{"auto_create_index_pool_size":{"type":"integer"},"auto_index_check_duration":{"type":"string"},"auto_index_duration_limit":{"type":"string"},"auto_index_length":{"type":"integer"},"auto_save_index_duration":{"type":"string"},"bulk_insert_chunk_size":{"type":"integer"},"creation_edge_size":{"type":"integer"},"default_epsilon":{"type":"number"},"default_pool_size":{"type":"integer"},"default_radius":{"type":"number"},"dimension":{"type":"integer","minimum":1},"distance_type":{"type":"string","enum":["l1","l2","angle","hamming","cos","cosine","normalizedangle","normalizedcosine","jaccard"]},"enable_in_memory_mode":{"type":"boolean"},"enable_proactive_gc":{"type":"boolean"},"index_path":{"type":"string"},"initial_delay_max_duration":{"type":"string"},"load_index_timeout_factor":{"type":"string"},"max_load_index_timeout":{"type":"string"},"min_load_index_timeout":{"type":"string"},"object_type":{"type":"string","enum":["float","uint8"]},"search_edge_size":{"type":"integer"}}},"nodeName":{"type":"string"},"nodeSelector":{"type":"object"},"observability":{"type":"object","properties":{"collector":{"type":"object","properties":{"duration":{"type":"string"},"metrics":{"type":"object","properties":{"enable_cgo":{"type":"boolean"},"enable_goroutine":{"type":"boolean"},"enable_memory":{"type":"boolean"},"enable_version_info":{"type":"boolean"},"version_info_labels":{"type":"array","items":{"type":"string","enum":["vald_version","server_name","git_commit","build_time","go_version","go_os","go_arch","cgo_enabled","ngt_version","build_cpu_info_flags"]}}}}}},"enabled":{"type":"boolean"},"jaeger":{"type":"object","properties":{"agent_endpoint":{"type":"string"},"buffer_max_count":{"type":"integer"},"collector_endpoint":{"type":"string"},"enabled":{"type":"boolean"},"password":{"type":"string"},"service_name":{"type":"string"},"username":{"type":"string"}}},"prometheus":{"type":"object","properties":{"enabled":{"type":"boolean"},"endpoint":{"type":"string"},"namespace":{"type":"string"}}},"stackdriver":{"type":"object","properties":{"client":{"type":"object","properties":{"api_key":{"type":"string"},"audiences":{"type":"array","items":{"type":"string"}},"authentication_enabled":{"type":"boolean"},"credentials_file":{"type":"string"},"credentials_json":{"type":"string"},"endpoint":{"type":"string"},"quota_project":{"type":"string"},"request_reason":{"type":"string"},"scopes":{"type":"array","items":{"type":"string"}},"telemetry_enabled":{"type":"boolean"},"user_agent":{"type":"string"}}},"exporter":{"type":"object","properties":{"bundle_count_threshold":{"type":"integer"},"bundle_delay_threshold":{"type":"string"},"location":{"type":"string"},"metric_prefix":{"type":"string"},"monitoring_enabled":{"type":"boolean"},"number_of_workers":{"type":"integer"},"reporting_interval":{"type":"string"},"skip_cmd":{"type":"boolean"},"timeout":{"type":"string"},"trace_spans_buffer_max_bytes":{"type":"integer"},"tracing_enabled":{"type":"boolean"}}},"profiler":{"type":"object","properties":{"alloc_force_gc":{"type":"boolean"},"alloc_profiling":{"type":"boolean"},"api_addr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:{"type":"string"}},"authentication_enabled":{"type":"boolean"},"credentials_file":{"type":"string"},"credentials_json":{"type":"string"},"endpoint":{"type":"string"},"quota_project":{"type":"string"},"request_reason":{"type":"string"},"scopes":{"type":"array","items":{"type":"string"}},"telemetry_enabled":{"type":"boolean"},"user_agent":{"type":"string"}}},"exporter":{"type":"object","properties":{"bundle_count_threshold":{"type":"integer"},"bundle_delay_threshold":{"type":"string"},"location":{"type":"string"},"metric_prefix":{"type":"string"},"monitoring_enabled":{"type":"boolean"},"number_of_workers":{"type":"integer"},"reporting_interval":{"type":"string"},"skip_cmd":{"type":"boolean"},"timeout":{"type":"string"},"trace_spans_buffer_max_bytes":{"type":"integer"},"tracing_enabled":{"type":"boolean"}}},"profiler":{"type":"object","properties":{"alloc_force_gc":{"type":"boolean"},"alloc_profiling":{"type":"boolean"},"api_addr":{"type":"string"},"cpu_profiling":{"type":"boolean"},"debug_logging":{"type":"boolean"},"enabled":{"type":"boolean"},"goroutine_profiling":{"type":"boolean"},"heap_profiling":{"type":"boolean"},"instance":{"type":"string"},"mutex_profiling":{"type":"boolean"},"service":{"type":"string"},"service_version":{"type":"string"},"zone":{"type":"string"}}},"project_id":{"type":"string"}}},"trace":{"type":"object","properties":{"enabled":{"type":"boolean"},"sampling_rate":{"type":"number"}}}}},"podAnnotations":{"type":"object"},"podPriority":{"type":"object","properties":{"enabled":{"type":"boolean"},"value":{"type":"integer"}}},"podSecurityContext":{"type":"object"},"progressDeadlineSeconds":{"type":"integer"},"redis":{"type":"object","properties":{"config":{"type":"object","properties":{"addrs":{"type":"array","items":{"type":"string"}},"db":{"type":"integer"},"dial_timeout":{"type":"string"},"idle_check_frequency":{"type":"string"},"idle_timeout":{"type":"string"},"key_pref":{"type":"string"},"kv_prefix":{"type":"string"},"max_conn_age":{"type":"string"},"max_redirects":{"type":"integer"},"max_retries":{"type":"integer"},"max_retry_backoff":{"type":"string"},"min_idle_conns":{"type":"integer"},"min_retry_backoff":{"type":"string"},"network":{"type":"string"},"password":{"type":"string"},"pool_size":{"type":"integer"},"pool_timeout":{"type":"string"},"prefix_delimiter":{"type":"string"},"read_only":{"type":"boolean"},"read_timeout":{"type":"string"},"route_by_latency":{"type":"boolean"},"route_randomly":{"type":"boolean"},"sentinel_master_name":{"type":"string"},"sentinel_password":{"type":"string"},"tcp":{"type":"object","properties":{"ca":{"type":"string"},"cert":{"type":"string"},"enabled":{"type":"boolean"},"insecure_skip_verify":{"type":"boolean"},"key":{"type":"string"}}},"tls":{"type":"object","properties":{"ca":{"type":"string"},"cert":{"type":"string"},"enabled":{"type":"boolean"},"insecure_skip_verify":{"type":"boolean"},"key":{"type":"string"}}},"vk_prefix":{"type":"string"},"write_timeout":{"type":"string"}}},"enabled":{"type":"boolean"}}},"resources":{"type":"object","properties":{"limits":{"type":"object"},"requests":{"type":"object"}}},"revisionHistoryLimit":{"type":"integer","minimum":0},"rollingUpdate":{"type":"object","properties":{"maxSurge":{"type":"string"},"maxUnavailable":{"type":"string"}}},"securityContext":{"type":"object"},"server_config":{"type":"object","properties":{"full_shutdown_duration":{"type":"string"},"healths":{"type":"object","properties":{"liveness":{"type":"object","properties":{"enabled":{"type":"boolean"},"host":{"type":"string"},"livenessProbe":{"type":"object","properties":{"failureThreshold":{"type":"integer"},"httpGet":{"type":"object","properties":{"path":{"type":"string"},"port":{"type":"string"},"scheme":{"type":"string"}}},"initialDelaySeconds":{"type":"integer"},"periodSeconds":{"type":"integer"},"successThreshold":{"type":"integer"},"timetoutSeconds":{"type":"integer"}}},"port":{"type":"integer","maximum":65535,"minimum":0},"server":{"type":"object","properties":{"http":{"type":"object","properties":{"handler_timeout":{"type":"string"},"idle_timeout":{"type":"string"},"read_header_timeout":{"type":"string"},"read_timeout":{"type":"string"},"shutdown_duration":{"type":"string"},"write_timeout":{"type":"string"}}},"mode":{"type":"string"},"probe_wait_time":{"type":"string"}}},"servicePort":{"type":"integer","maximum":65535,"minimum":0}}},"readiness":{"type":"object","properties":{"enabled":{"type":"boolean"},"host":{"type":"string"},"port":{"type":"integer","maximum":65535,"minimum":0},"readinessProbe":{"type":"object","properties":{"failureThreshold":{"type":"integer"},"httpGet":{"type":"object","properties":{"path":{"type":"string"},"port":{"type":"string"},"scheme":{"type":"string"}}},"initialDelaySeconds":{"type":"integer"},"periodSeconds":{"type":"integer"},"successThreshold":{"type":"integer"},"timeoutSeconds":{"type":"integer"}}},"server":{"type":"object","properties":{"http":{"type":"object","properties":{"handler_timeout":{"type":"string"},"idle_timeout":{"type":"string"},"read_header_timeout":{"type":"string"},"read_timeout":{"type":"string"},"shutdown_duration":{"type":"string"},"write_timeout":{"type":"string"}}},"mode":{"type":"string"},"probe_wait_time":{"type":"string"}}},"servicePort":{"type":"integer","maximum":65535,"minimum":0}}}}},"metrics":{"type":"object","properties":{"pprof":{"type":"object","properties":{"enabled":{"type":"boolean"},"host":{"type":"string"},"port":{"type":"integer","maximum":65535,"minimum":0},"server":{"type":"object","properties":{"http":{"type":"object","properties":{"handler_timeout":{"type":"string"},"idle_timeout":{"type":"string"},"read_header_timeout":{"type":"string"},"read_timeout":{"type":"string"},"shutdown_duration":{"type":"string"},"write_timeout":{"type":"string"}}},"mode":{"type":"string"},"probe_wait_time":{"type":"string"}}},"servicePort":{"type":"integer","maximum":65535,"minimum":0}}},"prometheus":{"type":"object","properties":{"enabled":{"type":"boolean"},"host":{"type":"string"},"port":{"type":"integer","maximum":65535,"minimum":0},"server":{"type":"object","properties":{"http":{"type":"object","properties":{"handler_timeout":{"type":"string"},"idle_timeout":{"type":"string"},"read_header_timeout":{"type":"string"},"read_timeout":{"type":"string"},"shutdown_duration":{"type":"string"},"write_timeout":{"type":"string"}}},"mode":{"type":"string"},"probe_wait_time":{"type":"string"}}},"servicePort":{"type":"integer","maximum":65535,"minimum":0}}}}},"servers":{"type":"object","properties":{"grpc":{"type":"object","properties":{"enabled":{"type":"boolean"},"host":{"type":"string"},"port":{"type":"integer","maximum":65535,"minimum":0},"server":{"type":"object","properties":{"grpc":{"type":"object","properties":{"bidirectional_stream_concurrency":{"type":"integer"},"connection_timeout":{"type":"string"},"header_table_size":{"type":"integer"},"initial_conn_window_size":{"type":"integer"},"initial_window_size":{"type":"integer"},"interceptors":{"type":"array","items":{"type":"string","enum":["RecoverInterceptor","AccessLogInterceptor","TracePayloadInterceptor"]}},"keepalive":{"type":"object","properties":{"max_conn_age":{"type":"string"},"max_conn_age_grace":{"type":"string"},"max_conn_idle":{"type":"string"},"time":{"type":"string"},"timeout":{"type":"string"}}},"max_header_list_size":{"type":"integer"},"max_receive_message_size":{"type":"integer"},"max_send_message_size":{"type":"integer"},"read_buffer_size":{"type":"integer"},"write_buffer_size":{"type":"integer"}}},"mode":{"type":"string"},"probe_wait_time":{"type":"string"},"restart":{"type":"boolean"}}},"servicePort":{"type":"integer","maximum":65535,"minimum":0}}},"rest":{"type":"object","properties":{"enabled":{"type":"boolean"},"host":{"type":"string"},"port":{"type":"integer","maximum":65535,"minimum":0},"server":{"type":"object","properties":{"handler_timeout":{"type":"string"},"http":{"type":"object"},"idle_timeout":{"type":"string"},"mode":{"type":"string"},"probe_wait_time":{"type":"string"},"read_header_timeout":{"type":"string"},"read_timeout":{"type":"string"},"shutdown_duration":{"type":"string"},"write_timeout":{"type":"string"}}},"servicePort":{"type":"integer","maximum":65535,"minimum":0}}}}},"tls":{"type":"object","properties":{"ca":{"type":"string"},"cert":{"type":"string"},"enabled":{"type":"boolean"},"insecure_skip_verify":{"type":"boolean"},"key":{"type":"string"}}}}},"service":{"type":"object","properties":{"annotations":{"type":"object"},"labels":{"type":"object"}}},"serviceType":{"type":"string","enum":["ClusterIP","LoadBalancer","NodePort"]},"terminationGracePeriodSeconds":{"type":"integer","minimum":0},"time_zone":{"type":"string"},"tolerations":{"type":"array","items":{"type":"object"}},"topologySpreadConstraints":{"type":"array","items":{"type":"object"}},"version":{"type":"string","pattern":"^v[0-9]+\\.[0-9]+\\.[0-9]$"},"volumeMounts":{"type":"array","items":{"type":"object"}},"volumes":{"type":"array","items":{"type":"object"}}}}}}
diff --git a/charts/vald/values.yaml b/charts/vald/values.yaml
index 83ed45d3ae..6605d0cd89 100644
--- a/charts/vald/values.yaml
+++ b/charts/vald/values.yaml
@@ -2912,6 +2912,39 @@ discoverer:
     # @schema {"name": "discoverer.discoverer.discovery_duration", "type": "string"}
     # discoverer.discoverer.discovery_duration -- duration to discovery
     discovery_duration: 3s
+    # @schema {"name": "discoverer.discoverer.tls", "alias": "tcp"}
+    tcp:
+      dns:
+        # discoverer.discoverer.tcp.dns.cache_enabled -- TCP DNS cache enabled
+        cache_enabled: true
+        # discoverer.discoverer.tcp.dns.refresh_duration -- TCP DNS cache refresh duration
+        refresh_duration: 5m
+        # discoverer.discoverer.tcp.dns.cache_expiration -- TCP DNS cache expiration
+        cache_expiration: 24h
+      dialer:
+        # discoverer.discoverer.tcp.dialer.timeout -- TCP dialer timeout
+        timeout: 30s
+        # discoverer.discoverer.tcp.dialer.keep_alive -- TCP dialer keep alive
+        keep_alive: 10m
+        # discoverer.discoverer.tcp.dialer.dual_stack_enabled -- TCP dialer dual stack enabled
+        dual_stack_enabled: false
+      # @schema {"name": "discoverer.discoverer.tcp.tls", "alias": "tls"}
+      tls:
+        # @schema {"name": "discoverer.discoverer.tcp.tls.enabled", "type": "boolean"}
+        # discoverer.discoverer.tcp.tls.enabled -- TLS enabled
+        enabled: false
+        # @schema {"name": "discoverer.discoverer.tcp.tls.cert", "type": "string"}
+        # discoverer.discoverer.tcp.tls.cert -- TLS cert path
+        cert: /path/to/cert
+        # @schema {"name": "discoverer.discoverer.tcp.tls.key", "type": "string"}
+        # discoverer.discoverer.tcp.tls.key -- TLS key path
+        key: /path/to/key
+        # @schema {"name": "discoverer.discoverer.tcp.tls.ca", "type": "string"}
+        # discoverer.discoverer.tcp.tls.ca -- TLS ca path
+        ca: /path/to/ca
+        # @schema {"name": "discoverer.discoverer.tcp.tls.insecure_skip_verify", "type": "boolean"}
+        # discoverer.discoverer.tcp.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
+        insecure_skip_verify: false
   # @schema {"name": "discoverer.clusterRole", "type": "object"}
   clusterRole:
     # @schema {"name": "discoverer.clusterRole.enabled", "type": "boolean"}
diff --git a/internal/config/discoverer.go b/internal/config/discoverer.go
index 26b16f1191..ca83422962 100644
--- a/internal/config/discoverer.go
+++ b/internal/config/discoverer.go
@@ -21,12 +21,18 @@ type Discoverer struct {
 	Name              string `json:"name" yaml:"name"`
 	Namespace         string `json:"namespace" yaml:"namespace"`
 	DiscoveryDuration string `json:"discovery_duration" yaml:"discovery_duration"`
+	TCP               *TCP   `json:"tcp" yaml:"tcp"`
 }
 
 func (d *Discoverer) Bind() *Discoverer {
 	d.Name = GetActualValue(d.Name)
 	d.Namespace = GetActualValue(d.Namespace)
 	d.DiscoveryDuration = GetActualValue(d.DiscoveryDuration)
+	if d.TCP != nil {
+		d.TCP.Bind()
+	} else {
+		d.TCP = new(TCP)
+	}
 	return d
 }
 
diff --git a/internal/k8s/option.go b/internal/k8s/option.go
index b346cfb183..ba5a8ab94e 100644
--- a/internal/k8s/option.go
+++ b/internal/k8s/option.go
@@ -19,6 +19,7 @@ package k8s
 
 import (
 	"github.com/vdaas/vald/internal/errgroup"
+	"github.com/vdaas/vald/internal/net/tcp"
 	"sigs.k8s.io/controller-runtime/pkg/manager"
 )
 
@@ -81,3 +82,12 @@ func WithDisableLeaderElection() Option {
 		return nil
 	}
 }
+
+func WithDialer(der tcp.Dialer) Option {
+	return func(c *controller) error {
+		if der != nil {
+			c.der = der
+		}
+		return nil
+	}
+}
diff --git a/internal/k8s/reconciler.go b/internal/k8s/reconciler.go
index a5deb7549b..7fb8905e69 100644
--- a/internal/k8s/reconciler.go
+++ b/internal/k8s/reconciler.go
@@ -23,20 +23,18 @@ import (
 
 	"github.com/vdaas/vald/internal/errgroup"
 	"github.com/vdaas/vald/internal/errors"
+	"github.com/vdaas/vald/internal/net/tcp"
 	"github.com/vdaas/vald/internal/safety"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/rest"
 	"sigs.k8s.io/controller-runtime/pkg/builder"
+	"sigs.k8s.io/controller-runtime/pkg/cache"
 	"sigs.k8s.io/controller-runtime/pkg/client"
 	"sigs.k8s.io/controller-runtime/pkg/client/config"
 	"sigs.k8s.io/controller-runtime/pkg/handler"
 	"sigs.k8s.io/controller-runtime/pkg/manager"
 	"sigs.k8s.io/controller-runtime/pkg/reconcile"
 	"sigs.k8s.io/controller-runtime/pkg/source"
-
-	"k8s.io/client-go/rest"
-
-	"sigs.k8s.io/controller-runtime/pkg/cache"
-	"sigs.k8s.io/controller-runtime/pkg/client"
 )
 
 type Controller interface {
@@ -58,6 +56,7 @@ type controller struct {
 	leaderElection bool
 	mgr            manager.Manager
 	rcs            []ResourceController
+	der            tcp.Dialer
 }
 
 func New(opts ...Option) (cl Controller, err error) {
@@ -78,7 +77,15 @@ func New(opts ...Option) (cl Controller, err error) {
 			return nil, errors.ErrInvalidReconcilerConfig
 		}
 		cb := manager.NewClientBuilder()
-		rc := &rest.Config{}
+		if c.der == nil {
+			c.der, err = tcp.NewDialer()
+			if err != nil {
+				return nil, err
+			}
+		}
+		rc := &rest.Config{
+			Dial: c.der.GetDialer(),
+		}
 		cc, err := cache.New(rc, cache.Options{})
 		if err != nil {
 			return nil, err
@@ -90,6 +97,7 @@ func New(opts ...Option) (cl Controller, err error) {
 				Scheme:             runtime.NewScheme(),
 				LeaderElection:     c.leaderElection,
 				MetricsBindAddress: c.merticsAddr,
+				ClientBuilder:      cb,
 			},
 		)
 		if err != nil {
@@ -126,6 +134,7 @@ func New(opts ...Option) (cl Controller, err error) {
 }
 
 func (c *controller) Start(ctx context.Context) (<-chan error, error) {
+	c.der.StartDialerCache(ctx)
 	ech := make(chan error, 1)
 	c.eg.Go(safety.RecoverFunc(func() error {
 		defer close(ech)
diff --git a/internal/net/tcp/dialer.go b/internal/net/tcp/dialer.go
index e732709285..712430ece1 100644
--- a/internal/net/tcp/dialer.go
+++ b/internal/net/tcp/dialer.go
@@ -43,6 +43,7 @@ type Dialer interface {
 type dialer struct {
 	cache                 cache.Cache
 	dnsCache              bool
+	dnsCachedOnce         sync.Once
 	tlsConfig             *tls.Config
 	dnsRefreshDurationStr string
 	dnsCacheExpirationStr string
@@ -156,7 +157,9 @@ func (d *dialer) lookup(ctx context.Context, host string) (*dialerCache, error)
 // StartDialerCache starts the dialer cache to expire the cache automatically.
 func (d *dialer) StartDialerCache(ctx context.Context) {
 	if d.dnsCache && d.cache != nil {
-		d.cache.Start(ctx)
+		d.dnsCachedOnce.Do(func() {
+			d.cache.Start(ctx)
+		})
 	}
 }
 
diff --git a/k8s/agent/configmap.yaml b/k8s/agent/configmap.yaml
index b2ca297b49..85c6f2b6c3 100644
--- a/k8s/agent/configmap.yaml
+++ b/k8s/agent/configmap.yaml
@@ -96,6 +96,7 @@ data:
         ca: /path/to/ca
         cert: /path/to/cert
         enabled: false
+        insecure_skip_verify: false
         key: /path/to/key
     observability:
       enabled: false
diff --git a/k8s/discoverer/configmap.yaml b/k8s/discoverer/configmap.yaml
index 03660c02dc..1cc2c4c8c1 100644
--- a/k8s/discoverer/configmap.yaml
+++ b/k8s/discoverer/configmap.yaml
@@ -109,6 +109,7 @@ data:
         ca: /path/to/ca
         cert: /path/to/cert
         enabled: false
+        insecure_skip_verify: false
         key: /path/to/key
     observability:
       enabled: false
@@ -187,3 +188,18 @@ data:
       discovery_duration: 3s
       name: ""
       namespace: _MY_POD_NAMESPACE_
+      tcp:
+        dialer:
+          dual_stack_enabled: false
+          keep_alive: 10m
+          timeout: 30s
+        dns:
+          cache_enabled: true
+          cache_expiration: 24h
+          refresh_duration: 5m
+        tls:
+          ca: /path/to/ca
+          cert: /path/to/cert
+          enabled: false
+          insecure_skip_verify: false
+          key: /path/to/key
diff --git a/k8s/discoverer/deployment.yaml b/k8s/discoverer/deployment.yaml
index d72b892754..e2c4f671b6 100644
--- a/k8s/discoverer/deployment.yaml
+++ b/k8s/discoverer/deployment.yaml
@@ -47,7 +47,7 @@ spec:
         app.kubernetes.io/instance: RELEASE-NAME
         app.kubernetes.io/component: discoverer
       annotations:
-        checksum/configmap: 3136e5175f02a3054fb086e2410e5d68904917048d0c6108f9477190ae661438
+        checksum/configmap: c05d484d2f3fe26b686558c5bb9daed8ea26d997875df8d20a73a5f1d15a148f
         profefe.com/enable: "true"
         profefe.com/port: "6060"
         profefe.com/service: vald-discoverer
diff --git a/k8s/gateway/backup/configmap.yaml b/k8s/gateway/backup/configmap.yaml
index 210cac770e..ab4acf1184 100644
--- a/k8s/gateway/backup/configmap.yaml
+++ b/k8s/gateway/backup/configmap.yaml
@@ -109,6 +109,7 @@ data:
         ca: /path/to/ca
         cert: /path/to/cert
         enabled: false
+        insecure_skip_verify: false
         key: /path/to/key
     observability:
       enabled: false
@@ -235,6 +236,7 @@ data:
             ca: /path/to/ca
             cert: /path/to/cert
             enabled: false
+            insecure_skip_verify: false
             key: /path/to/key
         timeout: ""
         write_buffer_size: 0
@@ -242,6 +244,7 @@ data:
         ca: /path/to/ca
         cert: /path/to/cert
         enabled: false
+        insecure_skip_verify: false
         key: /path/to/key
     backup:
       addrs:
@@ -295,6 +298,7 @@ data:
             ca: /path/to/ca
             cert: /path/to/cert
             enabled: false
+            insecure_skip_verify: false
             key: /path/to/key
         timeout: ""
         write_buffer_size: 0
@@ -302,4 +306,5 @@ data:
         ca: /path/to/ca
         cert: /path/to/cert
         enabled: false
+        insecure_skip_verify: false
         key: /path/to/key
diff --git a/k8s/gateway/backup/deployment.yaml b/k8s/gateway/backup/deployment.yaml
index 6e6463bffa..b3b0058e95 100644
--- a/k8s/gateway/backup/deployment.yaml
+++ b/k8s/gateway/backup/deployment.yaml
@@ -46,7 +46,7 @@ spec:
         app.kubernetes.io/instance: RELEASE-NAME
         app.kubernetes.io/component: gateway
       annotations:
-        checksum/configmap: fcdaf1f2c5cab57482f5c0d718ce6d037a997cac8beeb264fbeb70285edd098f
+        checksum/configmap: e0880baa51c21ac7efd4419d339170d94082b5b7b7ed8f43f4845175a3963c72
     spec:
       initContainers:
         - name: wait-for-manager-compressor
diff --git a/k8s/gateway/lb/configmap.yaml b/k8s/gateway/lb/configmap.yaml
index f43026d943..1f23b445d3 100644
--- a/k8s/gateway/lb/configmap.yaml
+++ b/k8s/gateway/lb/configmap.yaml
@@ -109,6 +109,7 @@ data:
         ca: /path/to/ca
         cert: /path/to/cert
         enabled: false
+        insecure_skip_verify: false
         key: /path/to/key
     observability:
       enabled: false
@@ -244,6 +245,7 @@ data:
                 ca: /path/to/ca
                 cert: /path/to/cert
                 enabled: false
+                insecure_skip_verify: false
                 key: /path/to/key
             timeout: ""
             write_buffer_size: 0
@@ -251,6 +253,7 @@ data:
             ca: /path/to/ca
             cert: /path/to/cert
             enabled: false
+            insecure_skip_verify: false
             key: /path/to/key
         agent_client_options:
           addrs: []
@@ -303,6 +306,7 @@ data:
                 ca: /path/to/ca
                 cert: /path/to/cert
                 enabled: false
+                insecure_skip_verify: false
                 key: /path/to/key
             timeout: ""
             write_buffer_size: 0
@@ -310,4 +314,5 @@ data:
             ca: /path/to/ca
             cert: /path/to/cert
             enabled: false
+            insecure_skip_verify: false
             key: /path/to/key
diff --git a/k8s/gateway/lb/deployment.yaml b/k8s/gateway/lb/deployment.yaml
index 1f7904d089..6f7f5182df 100644
--- a/k8s/gateway/lb/deployment.yaml
+++ b/k8s/gateway/lb/deployment.yaml
@@ -46,7 +46,7 @@ spec:
         app.kubernetes.io/instance: RELEASE-NAME
         app.kubernetes.io/component: gateway
       annotations:
-        checksum/configmap: d717646102fc21606e695d8612a0a71794da8baefada3df368077278e2b5a861
+        checksum/configmap: 85d524cf7a34e9d425a1ea355ee84cdf750e0617f4597ccb82460d0a3a785fbb
     spec:
       initContainers:
         - name: wait-for-discoverer
diff --git a/k8s/gateway/meta/configmap.yaml b/k8s/gateway/meta/configmap.yaml
index e9954a59ef..748e262716 100644
--- a/k8s/gateway/meta/configmap.yaml
+++ b/k8s/gateway/meta/configmap.yaml
@@ -109,6 +109,7 @@ data:
         ca: /path/to/ca
         cert: /path/to/cert
         enabled: false
+        insecure_skip_verify: false
         key: /path/to/key
     observability:
       enabled: false
@@ -235,6 +236,7 @@ data:
             ca: /path/to/ca
             cert: /path/to/cert
             enabled: false
+            insecure_skip_verify: false
             key: /path/to/key
         timeout: ""
         write_buffer_size: 0
@@ -242,6 +244,7 @@ data:
         ca: /path/to/ca
         cert: /path/to/cert
         enabled: false
+        insecure_skip_verify: false
         key: /path/to/key
     meta:
       client:
@@ -296,6 +299,7 @@ data:
               ca: /path/to/ca
               cert: /path/to/cert
               enabled: false
+              insecure_skip_verify: false
               key: /path/to/key
           timeout: ""
           write_buffer_size: 0
@@ -303,6 +307,7 @@ data:
           ca: /path/to/ca
           cert: /path/to/cert
           enabled: false
+          insecure_skip_verify: false
           key: /path/to/key
       enable_cache: true
       cache_expiration: 30m
diff --git a/k8s/gateway/meta/deployment.yaml b/k8s/gateway/meta/deployment.yaml
index c90b48e29b..cbb664884c 100644
--- a/k8s/gateway/meta/deployment.yaml
+++ b/k8s/gateway/meta/deployment.yaml
@@ -46,7 +46,7 @@ spec:
         app.kubernetes.io/instance: RELEASE-NAME
         app.kubernetes.io/component: gateway
       annotations:
-        checksum/configmap: c43e69b614c58ccb41d743c57293cbc08cf2bac8ce586b5942ba06a4e714964c
+        checksum/configmap: 13b81813ae4eed5cae1f646c230f12d76cd66fdda2d0f3aa4a8b98537382719e
     spec:
       initContainers:
         - name: wait-for-meta
diff --git a/k8s/manager/backup/configmap.yaml b/k8s/manager/backup/configmap.yaml
index db0cf6d691..d92b099ee9 100644
--- a/k8s/manager/backup/configmap.yaml
+++ b/k8s/manager/backup/configmap.yaml
@@ -109,6 +109,7 @@ data:
         ca: /path/to/ca
         cert: /path/to/cert
         enabled: false
+        insecure_skip_verify: false
         key: /path/to/key
     observability:
       enabled: false
@@ -205,10 +206,12 @@ data:
           ca: /path/to/ca
           cert: /path/to/cert
           enabled: false
+          insecure_skip_verify: false
           key: /path/to/key
       tls:
         ca: /path/to/ca
         cert: /path/to/cert
         enabled: false
+        insecure_skip_verify: false
         key: /path/to/key
       user: root
diff --git a/k8s/manager/backup/deployment.yaml b/k8s/manager/backup/deployment.yaml
index a26b11227b..557f7a0b3b 100644
--- a/k8s/manager/backup/deployment.yaml
+++ b/k8s/manager/backup/deployment.yaml
@@ -46,7 +46,7 @@ spec:
         app.kubernetes.io/instance: RELEASE-NAME
         app.kubernetes.io/component: manager-backup
       annotations:
-        checksum/configmap: e5f1e9e2f264c3413bf3cafc44bb23bc80ffcd6f9926c4330fff29730953ad59
+        checksum/configmap: 23d491a5e00548eb1abbf34fc2ae936b132353f21614b8408e3893296925e8da
         profefe.com/enable: "true"
         profefe.com/port: "6060"
         profefe.com/service: vald-manager-backup
diff --git a/k8s/manager/compressor/configmap.yaml b/k8s/manager/compressor/configmap.yaml
index e01a47d133..81374492ef 100644
--- a/k8s/manager/compressor/configmap.yaml
+++ b/k8s/manager/compressor/configmap.yaml
@@ -109,6 +109,7 @@ data:
         ca: /path/to/ca
         cert: /path/to/cert
         enabled: false
+        insecure_skip_verify: false
         key: /path/to/key
     observability:
       enabled: false
@@ -236,6 +237,7 @@ data:
               ca: /path/to/ca
               cert: /path/to/cert
               enabled: false
+              insecure_skip_verify: false
               key: /path/to/key
           timeout: ""
           write_buffer_size: 0
@@ -243,6 +245,7 @@ data:
           ca: /path/to/ca
           cert: /path/to/cert
           enabled: false
+          insecure_skip_verify: false
           key: /path/to/key
     compressor:
       compress_algorithm: "zstd"
@@ -305,6 +308,7 @@ data:
                 ca: /path/to/ca
                 cert: /path/to/cert
                 enabled: false
+                insecure_skip_verify: false
                 key: /path/to/key
             timeout: ""
             write_buffer_size: 0
@@ -312,4 +316,5 @@ data:
             ca: /path/to/ca
             cert: /path/to/cert
             enabled: false
+            insecure_skip_verify: false
             key: /path/to/key
diff --git a/k8s/manager/compressor/deployment.yaml b/k8s/manager/compressor/deployment.yaml
index 23c4a59563..e1a35f3e0d 100644
--- a/k8s/manager/compressor/deployment.yaml
+++ b/k8s/manager/compressor/deployment.yaml
@@ -46,7 +46,7 @@ spec:
         app.kubernetes.io/instance: RELEASE-NAME
         app.kubernetes.io/component: manager-compressor
       annotations:
-        checksum/configmap: 34d0e12d847e74fb2bc73a40f897e536a514059972be1e652376bbb363454925
+        checksum/configmap: efd969af65e1ba7f80d850b058c635317159d1f521f3271ee9961cf0f073fd93
         profefe.com/enable: "true"
         profefe.com/port: "6060"
         profefe.com/service: vald-manager-compressor
diff --git a/k8s/manager/index/configmap.yaml b/k8s/manager/index/configmap.yaml
index 14bf2ba314..8511cd2892 100644
--- a/k8s/manager/index/configmap.yaml
+++ b/k8s/manager/index/configmap.yaml
@@ -109,6 +109,7 @@ data:
         ca: /path/to/ca
         cert: /path/to/cert
         enabled: false
+        insecure_skip_verify: false
         key: /path/to/key
     observability:
       enabled: false
@@ -243,6 +244,7 @@ data:
                 ca: /path/to/ca
                 cert: /path/to/cert
                 enabled: false
+                insecure_skip_verify: false
                 key: /path/to/key
             timeout: ""
             write_buffer_size: 0
@@ -250,6 +252,7 @@ data:
             ca: /path/to/ca
             cert: /path/to/cert
             enabled: false
+            insecure_skip_verify: false
             key: /path/to/key
         agent_client_options:
           addrs: []
@@ -300,6 +303,7 @@ data:
                 ca: /path/to/ca
                 cert: /path/to/cert
                 enabled: false
+                insecure_skip_verify: false
                 key: /path/to/key
             keep_alive:
               permit_without_stream: false
@@ -309,6 +313,7 @@ data:
             ca: /path/to/ca
             cert: /path/to/cert
             enabled: false
+            insecure_skip_verify: false
             key: /path/to/key
       concurrency: 1
       auto_index_duration_limit: 30m
diff --git a/k8s/manager/index/deployment.yaml b/k8s/manager/index/deployment.yaml
index 74f21aacbe..e925da978b 100644
--- a/k8s/manager/index/deployment.yaml
+++ b/k8s/manager/index/deployment.yaml
@@ -47,7 +47,7 @@ spec:
         app.kubernetes.io/instance: RELEASE-NAME
         app.kubernetes.io/component: manager-index
       annotations:
-        checksum/configmap: ac64bd9a791ac1c7741062b7744bd0290642fbdbe36acc540ed83f8aef1ab4d5
+        checksum/configmap: 54c2dc549b942289930a9e84d32982e1013095ac12e6f98e5d2c4065a3463d2c
         profefe.com/enable: "true"
         profefe.com/port: "6060"
         profefe.com/service: vald-manager-index
diff --git a/k8s/meta/configmap.yaml b/k8s/meta/configmap.yaml
index 221dc21e64..a4ad89676c 100644
--- a/k8s/meta/configmap.yaml
+++ b/k8s/meta/configmap.yaml
@@ -109,6 +109,7 @@ data:
         ca: /path/to/ca
         cert: /path/to/cert
         enabled: false
+        insecure_skip_verify: false
         key: /path/to/key
     observability:
       enabled: false
@@ -222,11 +223,13 @@ data:
           ca: /path/to/ca
           cert: /path/to/cert
           enabled: false
+          insecure_skip_verify: false
           key: /path/to/key
       tls:
         ca: /path/to/ca
         cert: /path/to/cert
         enabled: false
+        insecure_skip_verify: false
         key: /path/to/key
       vk_prefix: ""
       write_timeout: 3s
diff --git a/k8s/meta/deployment.yaml b/k8s/meta/deployment.yaml
index b0b96d6edb..52f64c5b44 100644
--- a/k8s/meta/deployment.yaml
+++ b/k8s/meta/deployment.yaml
@@ -46,7 +46,7 @@ spec:
         app.kubernetes.io/instance: RELEASE-NAME
         app.kubernetes.io/component: meta
       annotations:
-        checksum/configmap: 0b9be93c5188425d93c0e81d1cb453c0e43be1092b6736e47b4473d802a3d1bc
+        checksum/configmap: a3ac23ba594e2b6aa951b14022790cae8effa2e6338aab1ea3f56d1a00c2242f
         profefe.com/enable: "true"
         profefe.com/port: "6060"
         profefe.com/service: vald-meta
diff --git a/pkg/discoverer/k8s/service/discover.go b/pkg/discoverer/k8s/service/discover.go
index cb84c56621..4535b95aea 100644
--- a/pkg/discoverer/k8s/service/discover.go
+++ b/pkg/discoverer/k8s/service/discover.go
@@ -34,6 +34,7 @@ import (
 	"github.com/vdaas/vald/internal/k8s/node"
 	"github.com/vdaas/vald/internal/k8s/pod"
 	"github.com/vdaas/vald/internal/log"
+	"github.com/vdaas/vald/internal/net/tcp"
 	"github.com/vdaas/vald/internal/safety"
 )
 
@@ -57,6 +58,7 @@ type discoverer struct {
 	namespace       string
 	name            string
 	csd             time.Duration
+	der             tcp.Dialer
 	eg              errgroup.Group
 }
 
@@ -170,6 +172,7 @@ func (d *discoverer) Start(ctx context.Context) (<-chan error, error) {
 	ech := make(chan error, 2)
 	d.eg.Go(safety.RecoverFunc(func() (err error) {
 		defer close(ech)
+		d.der.StartDialerCache(ctx)
 		dt := time.NewTicker(d.csd)
 		defer dt.Stop()
 		for {
diff --git a/pkg/discoverer/k8s/service/option.go b/pkg/discoverer/k8s/service/option.go
index 24891ef652..1ec3122733 100644
--- a/pkg/discoverer/k8s/service/option.go
+++ b/pkg/discoverer/k8s/service/option.go
@@ -21,6 +21,7 @@ import (
 	"time"
 
 	"github.com/vdaas/vald/internal/errgroup"
+	"github.com/vdaas/vald/internal/net/tcp"
 	"github.com/vdaas/vald/internal/timeutil"
 )
 
@@ -31,6 +32,15 @@ var defaultOptions = []Option{
 	WithErrGroup(errgroup.Get()),
 }
 
+func WithDialer(der tcp.Dialer) Option {
+	return func(d *discoverer) error {
+		if der != nil {
+			d.der = der
+		}
+		return nil
+	}
+}
+
 func WithName(name string) Option {
 	return func(d *discoverer) error {
 		if len(name) != 0 {
diff --git a/pkg/discoverer/k8s/usecase/discovered.go b/pkg/discoverer/k8s/usecase/discovered.go
index a589c09b86..8b23361c4b 100644
--- a/pkg/discoverer/k8s/usecase/discovered.go
+++ b/pkg/discoverer/k8s/usecase/discovered.go
@@ -24,6 +24,7 @@ import (
 	"github.com/vdaas/vald/internal/errgroup"
 	"github.com/vdaas/vald/internal/net/grpc"
 	"github.com/vdaas/vald/internal/net/grpc/metric"
+	"github.com/vdaas/vald/internal/net/tcp"
 	"github.com/vdaas/vald/internal/observability"
 	"github.com/vdaas/vald/internal/runner"
 	"github.com/vdaas/vald/internal/safety"
@@ -43,13 +44,21 @@ type run struct {
 	h             handler.DiscovererServer
 	server        starter.Server
 	observability observability.Observability
+	der           tcp.Dialer
 }
 
 func New(cfg *config.Data) (r runner.Runner, err error) {
 	eg := errgroup.Get()
+	der, err := tcp.NewDialer(cfg.Discoverer.TCP.Opts()...)
+	if err != nil {
+		return nil, err
+	}
 	dsc, err := service.New(
 		service.WithDiscoverDuration(cfg.Discoverer.DiscoveryDuration),
 		service.WithErrGroup(eg),
+		service.WithName(cfg.Discoverer.Name),
+		service.WithNamespace(cfg.Discoverer.Namespace),
+		service.WithDialer(der),
 	)
 	if err != nil {
 		return nil, err
@@ -115,6 +124,7 @@ func New(cfg *config.Data) (r runner.Runner, err error) {
 	}
 
 	return &run{
+		der:           der,
 		eg:            eg,
 		cfg:           cfg,
 		dsc:           dsc,
@@ -125,6 +135,7 @@ func New(cfg *config.Data) (r runner.Runner, err error) {
 }
 
 func (r *run) PreStart(ctx context.Context) error {
+	r.der.StartDialerCache(ctx)
 	if r.observability != nil {
 		return r.observability.PreStart(ctx)
 	}

From 8abb1a0c133161197be475b03fd68217cf63700b Mon Sep 17 00:00:00 2001
From: kpango <kpango@vdaas.org>
Date: Sat, 6 Feb 2021 08:36:50 +0900
Subject: [PATCH 07/22] fix

Signed-off-by: kpango <kpango@vdaas.org>
---
 cmd/discoverer/k8s/sample.yaml           | 25 +++++++++++++++++++-----
 internal/k8s/reconciler.go               | 23 +++++-----------------
 internal/net/tcp/dialer.go               |  9 +++++++--
 internal/net/tcp/dialer_test.go          |  2 +-
 pkg/discoverer/k8s/service/discover.go   |  1 +
 pkg/discoverer/k8s/usecase/discovered.go |  6 +++++-
 6 files changed, 39 insertions(+), 27 deletions(-)

diff --git a/cmd/discoverer/k8s/sample.yaml b/cmd/discoverer/k8s/sample.yaml
index b8f19ba5fb..f43773a63b 100644
--- a/cmd/discoverer/k8s/sample.yaml
+++ b/cmd/discoverer/k8s/sample.yaml
@@ -13,26 +13,25 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-
----
 version: v0.0.0
 time_zone: JST
 logging:
   format: raw
-  level: debug
+  level: info
   logger: glg
 server_config:
   servers:
     - name: grpc
       host: 0.0.0.0
-      port: 8081
+      port: 8082
       grpc:
         bidirectional_stream_concurrency: 20
         connection_timeout: ""
         header_table_size: 0
         initial_conn_window_size: 0
         initial_window_size: 0
-        interceptors: []
+        interceptors:
+          - RecoverInterceptor
         keepalive:
           max_conn_age: ""
           max_conn_age_grace: ""
@@ -82,6 +81,7 @@ server_config:
     ca: /path/to/ca
     cert: /path/to/cert
     enabled: false
+    insecure_skip_verify: false
     key: /path/to/key
 observability:
   enabled: false
@@ -160,3 +160,18 @@ discoverer:
   discovery_duration: 3s
   name: ""
   namespace: _MY_POD_NAMESPACE_
+  tcp:
+    dialer:
+      dual_stack_enabled: false
+      keep_alive: 10m
+      timeout: 30s
+    dns:
+      cache_enabled: true
+      cache_expiration: 24h
+      refresh_duration: 5m
+    tls:
+      enabled: false
+      ca: /path/to/ca
+      cert: /path/to/cert
+      key: /path/to/key
+      insecure_skip_verify: false
diff --git a/internal/k8s/reconciler.go b/internal/k8s/reconciler.go
index 7fb8905e69..e4e20b351b 100644
--- a/internal/k8s/reconciler.go
+++ b/internal/k8s/reconciler.go
@@ -26,9 +26,7 @@ import (
 	"github.com/vdaas/vald/internal/net/tcp"
 	"github.com/vdaas/vald/internal/safety"
 	"k8s.io/apimachinery/pkg/runtime"
-	"k8s.io/client-go/rest"
 	"sigs.k8s.io/controller-runtime/pkg/builder"
-	"sigs.k8s.io/controller-runtime/pkg/cache"
 	"sigs.k8s.io/controller-runtime/pkg/client"
 	"sigs.k8s.io/controller-runtime/pkg/client/config"
 	"sigs.k8s.io/controller-runtime/pkg/handler"
@@ -76,28 +74,15 @@ func New(opts ...Option) (cl Controller, err error) {
 		if cfg == nil {
 			return nil, errors.ErrInvalidReconcilerConfig
 		}
-		cb := manager.NewClientBuilder()
-		if c.der == nil {
-			c.der, err = tcp.NewDialer()
-			if err != nil {
-				return nil, err
-			}
-		}
-		rc := &rest.Config{
-			Dial: c.der.GetDialer(),
+		if c.der != nil {
+			cfg.Dial = c.der.GetDialer()
 		}
-		cc, err := cache.New(rc, cache.Options{})
-		if err != nil {
-			return nil, err
-		}
-		cb.Build(cc, rc, client.Options{})
 		c.mgr, err = manager.New(
 			cfg,
 			manager.Options{
 				Scheme:             runtime.NewScheme(),
 				LeaderElection:     c.leaderElection,
 				MetricsBindAddress: c.merticsAddr,
-				ClientBuilder:      cb,
 			},
 		)
 		if err != nil {
@@ -134,7 +119,9 @@ func New(opts ...Option) (cl Controller, err error) {
 }
 
 func (c *controller) Start(ctx context.Context) (<-chan error, error) {
-	c.der.StartDialerCache(ctx)
+	if c.der != nil {
+		c.der.StartDialerCache(ctx)
+	}
 	ech := make(chan error, 1)
 	c.eg.Go(safety.RecoverFunc(func() error {
 		defer close(ech)
diff --git a/internal/net/tcp/dialer.go b/internal/net/tcp/dialer.go
index 712430ece1..7c5bae16f2 100644
--- a/internal/net/tcp/dialer.go
+++ b/internal/net/tcp/dialer.go
@@ -150,6 +150,7 @@ func (d *dialer) lookup(ctx context.Context, host string) (*dialerCache, error)
 		dc.ips = append(dc.ips, ip.String())
 	}
 
+	log.Infof("lookup succeed %v", dc.ips)
 	d.cache.Set(host, dc)
 	return dc, nil
 }
@@ -235,7 +236,11 @@ func (d *dialer) dial(ctx context.Context, network, addr string) (conn net.Conn,
 	if d.tlsConfig != nil {
 		return d.tlsHandshake(ctx, conn, addr)
 	}
-
+	log.Infof("connected to addr %s succeed from %s://%s to %s://%s",
+		addr,
+		conn.LocalAddr().Network(), conn.LocalAddr().String(),
+		conn.RemoteAddr().Network(), conn.RemoteAddr().String(),
+	)
 	return conn, nil
 }
 
@@ -292,7 +297,7 @@ func (d *dialer) tlsHandshake(ctx context.Context, conn net.Conn, addr string) (
 		}(conn)
 		return nil, err
 	}
-	log.Debugf("tls handshake addr %s succeed from %s://%s to %s://%s,\tconnectionstate: [ Version:%s, ServerName: %s, HandshakeComplete: %v, DidResume: %v, NegotiatedProtocol: %s ]",
+	log.Infof("tls handshake addr %s succeed from %s://%s to %s://%s,\tconnectionstate: [ Version:%s, ServerName: %s, HandshakeComplete: %v, DidResume: %v, NegotiatedProtocol: %s ]",
 		addr,
 		tconn.LocalAddr().Network(), tconn.LocalAddr().String(),
 		tconn.RemoteAddr().Network(), tconn.RemoteAddr().String(),
diff --git a/internal/net/tcp/dialer_test.go b/internal/net/tcp/dialer_test.go
index 953a91b89d..9d3fd71cf2 100644
--- a/internal/net/tcp/dialer_test.go
+++ b/internal/net/tcp/dialer_test.go
@@ -264,7 +264,7 @@ func TestNewDialer(t *testing.T) {
 		got := gotDer.(*dialer)
 		opts := []cmp.Option{
 			cmp.AllowUnexported(*want),
-			cmpopts.IgnoreFields(*want, "dialer", "der", "addrs", "eg"),
+			cmpopts.IgnoreFields(*want, "dialer", "der", "addrs", "eg", "dnsCachedOnce"),
 			cmp.Comparer(func(x, y cache.Cache) bool {
 				if x == nil && y == nil {
 					return true
diff --git a/pkg/discoverer/k8s/service/discover.go b/pkg/discoverer/k8s/service/discover.go
index 4535b95aea..84578cc303 100644
--- a/pkg/discoverer/k8s/service/discover.go
+++ b/pkg/discoverer/k8s/service/discover.go
@@ -74,6 +74,7 @@ func New(opts ...Option) (dsc Discoverer, err error) {
 	d.podsByName.Store(make(map[string][]*payload.Info_Pod))
 	d.nodeByName.Store(make(map[string]*payload.Info_Node))
 	d.ctrl, err = k8s.New(
+		k8s.WithDialer(d.der),
 		k8s.WithControllerName("vald k8s agent discoverer"),
 		k8s.WithDisableLeaderElection(),
 		k8s.WithResourceController(mnode.New(
diff --git a/pkg/discoverer/k8s/usecase/discovered.go b/pkg/discoverer/k8s/usecase/discovered.go
index 8b23361c4b..f7d0fb1cdd 100644
--- a/pkg/discoverer/k8s/usecase/discovered.go
+++ b/pkg/discoverer/k8s/usecase/discovered.go
@@ -22,6 +22,7 @@ import (
 	"github.com/vdaas/vald/apis/grpc/v1/discoverer"
 	iconf "github.com/vdaas/vald/internal/config"
 	"github.com/vdaas/vald/internal/errgroup"
+	"github.com/vdaas/vald/internal/log"
 	"github.com/vdaas/vald/internal/net/grpc"
 	"github.com/vdaas/vald/internal/net/grpc/metric"
 	"github.com/vdaas/vald/internal/net/tcp"
@@ -51,6 +52,7 @@ func New(cfg *config.Data) (r runner.Runner, err error) {
 	eg := errgroup.Get()
 	der, err := tcp.NewDialer(cfg.Discoverer.TCP.Opts()...)
 	if err != nil {
+		log.Error(err)
 		return nil, err
 	}
 	dsc, err := service.New(
@@ -135,7 +137,9 @@ func New(cfg *config.Data) (r runner.Runner, err error) {
 }
 
 func (r *run) PreStart(ctx context.Context) error {
-	r.der.StartDialerCache(ctx)
+	if r.der != nil {
+		r.der.StartDialerCache(ctx)
+	}
 	if r.observability != nil {
 		return r.observability.PreStart(ctx)
 	}

From ab422a446e3e995b17c51a34ec2a5d66e701a23b Mon Sep 17 00:00:00 2001
From: kpango <kpango@vdaas.org>
Date: Sat, 6 Feb 2021 09:03:28 +0900
Subject: [PATCH 08/22] fix e2e test conparator for v1 API

Signed-off-by: kpango <kpango@vdaas.org>
---
 tests/e2e/crud_test.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tests/e2e/crud_test.go b/tests/e2e/crud_test.go
index fb6a3079ee..2b9067f71f 100644
--- a/tests/e2e/crud_test.go
+++ b/tests/e2e/crud_test.go
@@ -561,10 +561,10 @@ func TestE2EGetObject(t *testing.T) {
 					t.Errorf("an error returned:\terror: %v\tcode: %d\tmessage: %s\tdetails: %s", err, err.GetCode(), err.GetMessage(), errdetails.Serialize(err.GetDetails()))
 				}
 			} else {
-				if !reflect.DeepEqual(res.GetVector(), ds.train[resp.GetId()]) {
+				if !reflect.DeepEqual(res.GetVector().GetVector(), ds.train[resp.GetId()]) {
 					t.Errorf(
 						"result: %#v, expected: %#v",
-						res.GetVector(),
+						res.GetVector().GetVector(),
 						ds.train[resp.GetId()],
 					)
 				}

From 91c5c20c86d4535efea96887aa6ded052dd9d92c Mon Sep 17 00:00:00 2001
From: kpango <kpango@vdaas.org>
Date: Sat, 6 Feb 2021 09:18:33 +0900
Subject: [PATCH 09/22] fix

Signed-off-by: kpango <kpango@vdaas.org>
---
 internal/errors/net.go     | 4 ++++
 internal/net/tcp/dialer.go | 4 +++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/internal/errors/net.go b/internal/errors/net.go
index 1a146601e7..497e24764f 100644
--- a/internal/errors/net.go
+++ b/internal/errors/net.go
@@ -36,4 +36,8 @@ var (
 	ErrNoPortAvailable = func(host string, start, end uint16) error {
 		return Errorf("no port available for Host: %s\tbetween %d ~ %d", host, start, end)
 	}
+
+	ErrLookupIPAddrNotFound = func(host string)error{
+		return Errorf("failed to lookup ip addrs for host: %s", host)
+	}
 )
diff --git a/internal/net/tcp/dialer.go b/internal/net/tcp/dialer.go
index 7c5bae16f2..cc758856ce 100644
--- a/internal/net/tcp/dialer.go
+++ b/internal/net/tcp/dialer.go
@@ -142,6 +142,9 @@ func (d *dialer) lookup(ctx context.Context, host string) (*dialerCache, error)
 	if err != nil {
 		return nil, err
 	}
+	if len(r) == 0{
+		return nil, errors.ErrLookupIPAddrNotFound(host)
+	}
 
 	dc := &dialerCache{
 		ips: make([]string, 0, len(r)),
@@ -150,7 +153,6 @@ func (d *dialer) lookup(ctx context.Context, host string) (*dialerCache, error)
 		dc.ips = append(dc.ips, ip.String())
 	}
 
-	log.Infof("lookup succeed %v", dc.ips)
 	d.cache.Set(host, dc)
 	return dc, nil
 }

From f63c78d69478f1539a813211bdb716af20af12cc Mon Sep 17 00:00:00 2001
From: kpango <kpango@vdaas.org>
Date: Sat, 6 Feb 2021 09:26:02 +0900
Subject: [PATCH 10/22] fix

Signed-off-by: kpango <kpango@vdaas.org>
---
 internal/errors/net.go          | 2 +-
 internal/net/tcp/dialer.go      | 5 ++++-
 internal/net/tcp/dialer_test.go | 7 ++++++-
 3 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/internal/errors/net.go b/internal/errors/net.go
index 497e24764f..7fcd4bf18a 100644
--- a/internal/errors/net.go
+++ b/internal/errors/net.go
@@ -37,7 +37,7 @@ var (
 		return Errorf("no port available for Host: %s\tbetween %d ~ %d", host, start, end)
 	}
 
-	ErrLookupIPAddrNotFound = func(host string)error{
+	ErrLookupIPAddrNotFound = func(host string) error {
 		return Errorf("failed to lookup ip addrs for host: %s", host)
 	}
 )
diff --git a/internal/net/tcp/dialer.go b/internal/net/tcp/dialer.go
index cc758856ce..4c06d70277 100644
--- a/internal/net/tcp/dialer.go
+++ b/internal/net/tcp/dialer.go
@@ -142,17 +142,20 @@ func (d *dialer) lookup(ctx context.Context, host string) (*dialerCache, error)
 	if err != nil {
 		return nil, err
 	}
-	if len(r) == 0{
+
+	if len(r) == 0 {
 		return nil, errors.ErrLookupIPAddrNotFound(host)
 	}
 
 	dc := &dialerCache{
 		ips: make([]string, 0, len(r)),
 	}
+
 	for _, ip := range r {
 		dc.ips = append(dc.ips, ip.String())
 	}
 
+	log.Infof("lookup succeed %v", dc.ips)
 	d.cache.Set(host, dc)
 	return dc, nil
 }
diff --git a/internal/net/tcp/dialer_test.go b/internal/net/tcp/dialer_test.go
index 9d3fd71cf2..41872e213d 100644
--- a/internal/net/tcp/dialer_test.go
+++ b/internal/net/tcp/dialer_test.go
@@ -26,6 +26,7 @@ import (
 	stdnet "net"
 	"net/http"
 	"net/http/httptest"
+	"os"
 	"reflect"
 	"strconv"
 	"strings"
@@ -51,6 +52,11 @@ var goleakIgnoreOptions = []goleak.Option{
 	goleak.IgnoreTopFunction("net._C2func_getaddrinfo"),
 }
 
+func TestMain(m *testing.M) {
+	log.Init()
+	os.Exit(m.Run())
+}
+
 func Test_dialerCache_IP(t *testing.T) {
 	type fields struct {
 		ips []string
@@ -796,7 +802,6 @@ func Test_dialer_StartDialerCache(t *testing.T) {
 		}(),
 	}
 
-	log.Init()
 	for _, test := range tests {
 		t.Run(test.name, func(tt *testing.T) {
 			defer goleak.VerifyNone(tt, goleakIgnoreOptions...)

From b480b955aff5d451600806ce85069e94712b1e17 Mon Sep 17 00:00:00 2001
From: kpango <kpango@vdaas.org>
Date: Mon, 8 Feb 2021 11:45:14 +0900
Subject: [PATCH 11/22] fix useless schema annotation for helm charts

Signed-off-by: kpango <kpango@vdaas.org>
---
 charts/vald/values.yaml | 76 +++--------------------------------------
 1 file changed, 5 insertions(+), 71 deletions(-)

diff --git a/charts/vald/values.yaml b/charts/vald/values.yaml
index 6605d0cd89..b6010c211b 100644
--- a/charts/vald/values.yaml
+++ b/charts/vald/values.yaml
@@ -542,19 +542,14 @@ defaults:
             dual_stack_enabled: true
           # @schema {"name": "defaults.grpc.client.dial_option.tcp.tls", "alias": "tls"}
           tls:
-            # @schema {"name": "defaults.grpc.client.dial_option.tcp.tls.enabled", "type": "boolean"}
             # defaults.grpc.client.dial_option.tcp.tls.enabled -- TLS enabled
             enabled: false
-            # @schema {"name": "defaults.grpc.client.dial_option.tcp.tls.cert", "type": "string"}
             # defaults.grpc.client.dial_option.tcp.tls.cert -- TLS cert path
             cert: /path/to/cert
-            # @schema {"name": "defaults.grpc.client.dial_option.tcp.tls.key", "type": "string"}
             # defaults.grpc.client.dial_option.tcp.tls.key -- TLS key path
             key: /path/to/key
-            # @schema {"name": "defaults.grpc.client.dial_option.tcp.tls.ca", "type": "string"}
             # defaults.grpc.client.dial_option.tcp.tls.ca -- TLS ca path
             ca: /path/to/ca
-            # @schema {"name": "defaults.grpc.client.dial_option.tcp.tls.insecure_skip_verify", "type": "boolean"}
             # defaults.grpc.client.dial_option.tcp.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
             insecure_skip_verify: false
         # @schema {"name": "defaults.grpc.client.dial_option.keep_alive", "type": "object"}
@@ -570,19 +565,14 @@ defaults:
           permit_without_stream: false
       # @schema {"name": "defaults.grpc.client.tls", "alias": "tls"}
       tls:
-        # @schema {"name": "defaults.grpc.client.tls.enabled", "type": "boolean"}
         # defaults.grpc.client.tls.enabled -- TLS enabled
         enabled: false
-        # @schema {"name": "defaults.grpc.client.tls.cert", "type": "string"}
         # defaults.grpc.client.tls.cert -- TLS cert path
         cert: /path/to/cert
-        # @schema {"name": "defaults.grpc.client.tls.key", "type": "string"}
         # defaults.grpc.client.tls.key -- TLS key path
         key: /path/to/key
-        # @schema {"name": "defaults.grpc.client.tls.ca", "type": "string"}
         # defaults.grpc.client.tls.ca -- TLS ca path
         ca: /path/to/ca
-        # @schema {"name": "defaults.grpc.client.tls.insecure_skip_verify", "type": "boolean"}
         # defaults.grpc.client.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
         insecure_skip_verify: false
   # @schema {"name": "defaults.observability", "type": "object", "anchor": "observability"}
@@ -2624,21 +2614,15 @@ agent:
             keep_alive: 5m
             # agent.sidecar.config.client.tcp.dialer.dual_stack_enabled -- HTTP client TCP dialer dual stack enabled
             dual_stack_enabled: false
-          # @schema {"name": "agent.sidecar.config.client.tls", "alias": "tls"}
           tls:
-            # @schema {"name": "agent.sidecar.config.client.tls.enabled", "type": "boolean"}
             # agent.sidecar.config.client.tls.enabled -- TLS enabled
             enabled: false
-            # @schema {"name": "agent.sidecar.config.client.tls.cert", "type": "string"}
             # agent.sidecar.config.client.tls.cert -- TLS cert path
             cert: /path/to/cert
-            # @schema {"name": "agent.sidecar.config.client.tls.key", "type": "string"}
             # agent.sidecar.config.client.tls.key -- TLS key path
             key: /path/to/key
-            # @schema {"name": "agent.sidecar.config.client.tls.ca", "type": "string"}
             # agent.sidecar.config.client.tls.ca -- TLS ca path
             ca: /path/to/ca
-            # @schema {"name": "agent.sidecar.config.client.tls.insecure_skip_verify", "type": "boolean"}
             # agent.sidecar.config.client.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
             insecure_skip_verify: false
         # @schema {"name": "agent.sidecar.config.client.transport", "type": "object"}
@@ -2912,7 +2896,7 @@ discoverer:
     # @schema {"name": "discoverer.discoverer.discovery_duration", "type": "string"}
     # discoverer.discoverer.discovery_duration -- duration to discovery
     discovery_duration: 3s
-    # @schema {"name": "discoverer.discoverer.tls", "alias": "tcp"}
+    # @schema {"name": "discoverer.discoverer.tcp", "alias": "tcp"}
     tcp:
       dns:
         # discoverer.discoverer.tcp.dns.cache_enabled -- TCP DNS cache enabled
@@ -2928,21 +2912,15 @@ discoverer:
         keep_alive: 10m
         # discoverer.discoverer.tcp.dialer.dual_stack_enabled -- TCP dialer dual stack enabled
         dual_stack_enabled: false
-      # @schema {"name": "discoverer.discoverer.tcp.tls", "alias": "tls"}
       tls:
-        # @schema {"name": "discoverer.discoverer.tcp.tls.enabled", "type": "boolean"}
         # discoverer.discoverer.tcp.tls.enabled -- TLS enabled
         enabled: false
-        # @schema {"name": "discoverer.discoverer.tcp.tls.cert", "type": "string"}
         # discoverer.discoverer.tcp.tls.cert -- TLS cert path
         cert: /path/to/cert
-        # @schema {"name": "discoverer.discoverer.tcp.tls.key", "type": "string"}
         # discoverer.discoverer.tcp.tls.key -- TLS key path
         key: /path/to/key
-        # @schema {"name": "discoverer.discoverer.tcp.tls.ca", "type": "string"}
         # discoverer.discoverer.tcp.tls.ca -- TLS ca path
         ca: /path/to/ca
-        # @schema {"name": "discoverer.discoverer.tcp.tls.insecure_skip_verify", "type": "boolean"}
         # discoverer.discoverer.tcp.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
         insecure_skip_verify: false
   # @schema {"name": "discoverer.clusterRole", "type": "object"}
@@ -3463,22 +3441,17 @@ manager:
         max_idle_conns: 100
         # @schema {"name": "manager.backup.mysql.config.tls", "alias": "tls"}
         tls:
-          # @schema {"name": "manager.backup.mysql.config.tls.enabled", "type": "boolean"}
           # manager.backup.mysql.config.tls.enabled -- TLS enabled
           enabled: false
-          # @schema {"name": "manager.backup.mysql.config.tls.cert", "type": "string"}
           # manager.backup.mysql.config.tls.cert -- TLS cert path
           cert: /path/to/cert
-          # @schema {"name": "manager.backup.mysql.config.tls.key", "type": "string"}
           # manager.backup.mysql.config.tls.key -- TLS key path
           key: /path/to/key
-          # @schema {"name": "manager.backup.mysql.config.tls.ca", "type": "string"}
           # manager.backup.mysql.config.tls.ca -- TLS ca path
           ca: /path/to/ca
-          # @schema {"name": "manager.backup.mysql.config.tls.insecure_skip_verify", "type": "boolean"}
           # manager.backup.mysql.config.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
           insecure_skip_verify: false
-        # @schema {"name": "manager.backup.mysql.config.tls", "alias": "tcp"}
+        # @schema {"name": "manager.backup.mysql.config.tcp", "alias": "tcp"}
         tcp:
           dns:
             # manager.backup.mysql.config.tcp.dns.cache_enabled -- TCP DNS cache enabled
@@ -3494,21 +3467,15 @@ manager:
             keep_alive: 5m
             # manager.backup.mysql.config.tcp.dialer.dual_stack_enabled -- TCP dialer dual stack enabled
             dual_stack_enabled: false
-          # @schema {"name": "manager.backup.mysql.config.tcp.tls", "alias": "tls"}
           tls:
-            # @schema {"name": "manager.backup.mysql.config.tcp.tls.enabled", "type": "boolean"}
             # manager.backup.mysql.config.tcp.tls.enabled -- TLS enabled
             enabled: false
-            # @schema {"name": "manager.backup.mysql.config.tcp.tls.cert", "type": "string"}
             # manager.backup.mysql.config.tcp.tls.cert -- TLS cert path
             cert: /path/to/cert
-            # @schema {"name": "manager.backup.mysql.config.tcp.tls.key", "type": "string"}
             # manager.backup.mysql.config.tcp.tls.key -- TLS key path
             key: /path/to/key
-            # @schema {"name": "manager.backup.mysql.config.tcp.tls.ca", "type": "string"}
             # manager.backup.mysql.config.tcp.tls.ca -- TLS ca path
             ca: /path/to/ca
-            # @schema {"name": "manager.backup.mysql.config.tcp.tls.insecure_skip_verify", "type": "boolean"}
             # manager.backup.mysql.config.tcp.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
             insecure_skip_verify: false
     # @schema {"name": "manager.backup.cassandra", "type": "object", "anchor": "cassandra"}
@@ -3593,22 +3560,17 @@ manager:
         page_size: 5000
         # @schema {"name": "manager.backup.cassandra.config.tls", "alias": "tls"}
         tls:
-          # @schema {"name": "manager.backup.cassandra.config.tls.enabled", "type": "boolean"}
           # manager.backup.cassandra.config.tls.enabled -- TLS enabled
           enabled: false
-          # @schema {"name": "manager.backup.cassandra.config.tls.cert", "type": "string"}
           # manager.backup.cassandra.config.tls.cert -- TLS cert path
           cert: /path/to/cert
-          # @schema {"name": "manager.backup.cassandra.config.tls.key", "type": "string"}
           # manager.backup.cassandra.config.tls.key -- TLS key path
           key: /path/to/key
-          # @schema {"name": "manager.backup.cassandra.config.tls.ca", "type": "string"}
           # manager.backup.cassandra.config.tls.ca -- TLS ca path
           ca: /path/to/ca
-          # @schema {"name": "manager.backup.cassandra.config.tls.insecure_skip_verify", "type": "boolean"}
           # manager.backup.cassandra.config.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
           insecure_skip_verify: false
-        # @schema {"name": "manager.backup.cassandra.config.tls", "alias": "tcp"}
+        # @schema {"name": "manager.backup.cassandra.config.tcp", "alias": "tcp"}
         tcp:
           dns:
             # manager.backup.cassandra.config.tcp.dns.cache_enabled -- TCP DNS cache enabled
@@ -3624,21 +3586,15 @@ manager:
             keep_alive: 10m
             # manager.backup.cassandra.config.tcp.dialer.dual_stack_enabled -- TCP dialer dual stack enabled
             dual_stack_enabled: false
-          # @schema {"name": "manager.backup.cassandra.config.tcp.tls", "alias": "tls"}
           tls:
-            # @schema {"name": "manager.backup.cassandra.config.tcp.tls.enabled", "type": "boolean"}
             # manager.backup.cassandra.config.tcp.tls.enabled -- TLS enabled
             enabled: false
-            # @schema {"name": "manager.backup.cassandra.config.tcp.tls.cert", "type": "string"}
             # manager.backup.cassandra.config.tcp.tls.cert -- TLS cert path
             cert: /path/to/cert
-            # @schema {"name": "manager.backup.cassandra.config.tcp.tls.key", "type": "string"}
             # manager.backup.cassandra.config.tcp.tls.key -- TLS key path
             key: /path/to/key
-            # @schema {"name": "manager.backup.cassandra.config.tcp.tls.ca", "type": "string"}
             # manager.backup.cassandra.config.tcp.tls.ca -- TLS ca path
             ca: /path/to/ca
-            # @schema {"name": "manager.backup.cassandra.config.tcp.tls.insecure_skip_verify", "type": "boolean"}
             # manager.backup.cassandra.config.tcp.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
             insecure_skip_verify: false
         # @schema {"name": "manager.backup.cassandra.config.enable_host_verification", "type": "boolean"}
@@ -4234,22 +4190,17 @@ meta:
       route_randomly: true
       # @schema {"name": "meta.redis.config.tls", "alias": "tls"}
       tls:
-        # @schema {"name": "meta.redis.config.tls.enabled", "type": "boolean"}
         # meta.redis.config.tls.enabled -- TLS enabled
         enabled: false
-        # @schema {"name": "meta.redis.config.tls.cert", "type": "string"}
         # meta.redis.config.tls.cert -- TLS cert path
         cert: /path/to/cert
-        # @schema {"name": "meta.redis.config.tls.key", "type": "string"}
         # meta.redis.config.tls.key -- TLS key path
         key: /path/to/key
-        # @schema {"name": "meta.redis.config.tls.ca", "type": "string"}
         # meta.redis.config.tls.ca -- TLS ca path
         ca: /path/to/ca
-        # @schema {"name": "meta.redis.config.tls.insecure_skip_verify", "type": "boolean"}
         # meta.redis.config.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
         insecure_skip_verify: false
-      # @schema {"name": "meta.redis.config.tls", "alias": "tcp"}
+      # @schema {"name": "meta.redis.config.tcp", "alias": "tcp"}
       tcp:
         dns:
           # meta.redis.config.tcp.dns.cache_enabled -- TCP DNS cache enabled
@@ -4265,21 +4216,15 @@ meta:
           keep_alive: 5m
           # meta.redis.config.tcp.dialer.dual_stack_enabled -- TCP dialer dual stack enabled
           dual_stack_enabled: false
-        # @schema {"name": "meta.redis.config.tcp.tls", "alias": "tls"}
         tls:
-          # @schema {"name": "meta.redis.config.tcp.tls.enabled", "type": "boolean"}
           # meta.redis.config.tcp.tls.enabled -- TLS enabled
           enabled: false
-          # @schema {"name": "meta.redis.config.tcp.tls.cert", "type": "string"}
           # meta.redis.config.tcp.tls.cert -- TLS cert path
           cert: /path/to/cert
-          # @schema {"name": "meta.redis.config.tcp.tls.key", "type": "string"}
           # meta.redis.config.tcp.tls.key -- TLS key path
           key: /path/to/key
-          # @schema {"name": "meta.redis.config.tcp.tls.ca", "type": "string"}
           # meta.redis.config.tcp.tls.ca -- TLS ca path
           ca: /path/to/ca
-          # @schema {"name": "meta.redis.config.tcp.tls.insecure_skip_verify", "type": "boolean"}
           # meta.redis.config.tcp.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
           insecure_skip_verify: false
       # @schema {"name": "meta.redis.config.kv_prefix", "type": "string"}
@@ -4348,22 +4293,17 @@ meta:
       page_size: 5000
       # @schema {"name": "meta.cassandra.config.tls", "alias": "tls"}
       tls:
-        # @schema {"name": "meta.cassandra.config.tls.enabled", "type": "boolean"}
         # meta.cassandra.config.tls.enabled -- TLS enabled
         enabled: false
-        # @schema {"name": "meta.cassandra.config.tls.cert", "type": "string"}
         # meta.cassandra.config.tls.cert -- TLS cert path
         cert: /path/to/cert
-        # @schema {"name": "meta.cassandra.config.tls.key", "type": "string"}
         # meta.cassandra.config.tls.key -- TLS key path
         key: /path/to/key
-        # @schema {"name": "meta.cassandra.config.tls.ca", "type": "string"}
         # meta.cassandra.config.tls.ca -- TLS ca path
         ca: /path/to/ca
-        # @schema {"name": "meta.cassandra.config.tls.insecure_skip_verify", "type": "boolean"}
         # meta.cassandra.config.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
         insecure_skip_verify: false
-      # @schema {"name": "meta.cassandra.config.tls", "alias": "tcp"}
+      # @schema {"name": "meta.cassandra.config.tcp", "alias": "tcp"}
       tcp:
         dns:
           # meta.cassandra.config.tcp.dns.cache_enabled -- TCP DNS cache enabled
@@ -4379,21 +4319,15 @@ meta:
           keep_alive: 10m
           # meta.cassandra.config.tcp.dialer.dual_stack_enabled -- TCP dialer dual stack enabled
           dual_stack_enabled: false
-        # @schema {"name": "meta.cassandra.config.tcp.tls", "alias": "tls"}
         tls:
-          # @schema {"name": "meta.cassandra.config.tcp.tls.enabled", "type": "boolean"}
           # meta.cassandra.config.tcp.tls.enabled -- TLS enabled
           enabled: false
-          # @schema {"name": "meta.cassandra.config.tcp.tls.cert", "type": "string"}
           # meta.cassandra.config.tcp.tls.cert -- TLS cert path
           cert: /path/to/cert
-          # @schema {"name": "meta.cassandra.config.tcp.tls.key", "type": "string"}
           # meta.cassandra.config.tcp.tls.key -- TLS key path
           key: /path/to/key
-          # @schema {"name": "meta.cassandra.config.tcp.tls.ca", "type": "string"}
           # meta.cassandra.config.tcp.tls.ca -- TLS ca path
           ca: /path/to/ca
-          # @schema {"name": "meta.cassandra.config.tcp.tls.insecure_skip_verify", "type": "boolean"}
           # meta.cassandra.config.tcp.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
           insecure_skip_verify: false
       # meta.cassandra.config.enable_host_verification -- host verification enabled

From 02f575ab0572f545e922478cda800067ec945d46 Mon Sep 17 00:00:00 2001
From: kpango <kpango@vdaas.org>
Date: Mon, 8 Feb 2021 20:20:43 +0900
Subject: [PATCH 12/22] change CreateIndex precondition failure log level to
 Warn from Error & downgrade NGT version to 1.12.3 due to the memory
 instability

Signed-off-by: kpango <kpango@vdaas.org>
---
 pkg/agent/core/ngt/handler/grpc/handler.go | 2 +-
 versions/NGT_VERSION                       | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkg/agent/core/ngt/handler/grpc/handler.go b/pkg/agent/core/ngt/handler/grpc/handler.go
index 6f1ee39723..1742fcb90e 100644
--- a/pkg/agent/core/ngt/handler/grpc/handler.go
+++ b/pkg/agent/core/ngt/handler/grpc/handler.go
@@ -1061,7 +1061,7 @@ func (s *server) CreateIndex(ctx context.Context, c *payload.Control_CreateIndex
 						},
 					},
 				}, info.Get())
-			log.Error(err)
+			log.Warn(err)
 			if span != nil {
 				span.SetStatus(trace.StatusCodeFailedPrecondition(err.Error()))
 			}
diff --git a/versions/NGT_VERSION b/versions/NGT_VERSION
index b50dd27dd9..81f363239f 100644
--- a/versions/NGT_VERSION
+++ b/versions/NGT_VERSION
@@ -1 +1 @@
-1.13.1
+1.12.3

From b5ab14e93af72bfd2c1d78f20662f81443d2e6f3 Mon Sep 17 00:00:00 2001
From: kpango <kpango@vdaas.org>
Date: Tue, 9 Feb 2021 11:43:24 +0900
Subject: [PATCH 13/22] add generated test & update helm schema

Signed-off-by: kpango <kpango@vdaas.org>
---
 charts/vald/values.schema.json                |   2 +-
 go.mod                                        |   6 +-
 go.sum                                        |  12 +-
 .../v1/client/compressor/client_test.go       |  76 +++
 internal/errors/errors_test.go                | 111 ++--
 internal/k8s/option_test.go                   | 118 +++++
 .../net/grpc/errdetails/errdetails_test.go    | 492 ++++++++++++++++++
 internal/net/grpc/types/types_test.go         | 102 ++++
 internal/net/net_test.go                      |  76 +++
 internal/net/tcp/dialer_test.go               | 158 ++++++
 internal/net/tcp/option_test.go               | 235 +++++++++
 internal/tls/tls_test.go                      |  77 +++
 k8s/gateway/backup/priorityclass.yaml         |   2 +-
 k8s/gateway/lb/priorityclass.yaml             |   2 +-
 k8s/gateway/meta/priorityclass.yaml           |   2 +-
 pkg/discoverer/k8s/service/option_test.go     | 118 +++++
 pkg/gateway/lb/service/gateway_test.go        |  90 ++++
 pkg/gateway/meta/service/meta_test.go         |  92 ++++
 18 files changed, 1702 insertions(+), 69 deletions(-)
 create mode 100644 internal/net/grpc/errdetails/errdetails_test.go
 create mode 100644 internal/net/grpc/types/types_test.go

diff --git a/charts/vald/values.schema.json b/charts/vald/values.schema.json
index bc38788c4d..7a139f3875 100644
--- a/charts/vald/values.schema.json
+++ b/charts/vald/values.schema.json
@@ -1 +1 @@
-{"$schema":"http://json-schema.org/draft-07/schema#","title":"Values","type":"object","properties":{"agent":{"type":"object","properties":{"affinity":{"type":"object","properties":{"nodeAffinity":{"type":"object","properties":{"preferredDuringSchedulingIgnoredDuringExecution":{"type":"array","items":{"type":"object"}},"requiredDuringSchedulingIgnoredDuringExecution":{"type":"object","properties":{"nodeSelectorTerms":{"type":"array","items":{"type":"object"}}}}}},"podAffinity":{"type":"object","properties":{"preferredDuringSchedulingIgnoredDuringExecution":{"type":"array","items":{"type":"object"}},"requiredDuringSchedulingIgnoredDuringExecution":{"type":"array","items":{"type":"object"}}}},"podAntiAffinity":{"type":"object","properties":{"preferredDuringSchedulingIgnoredDuringExecution":{"type":"array","items":{"type":"object"}},"requiredDuringSchedulingIgnoredDuringExecution":{"type":"array","items":{"type":"object"}}}}}},"annotations":{"type":"object"},"enabled":{"type":"boolean"},"env":{"type":"array","items":{"type":"object"}},"externalTrafficPolicy":{"type":"string"},"hpa":{"type":"object","properties":{"enabled":{"type":"boolean"},"targetCPUUtilizationPercentage":{"type":"integer"}}},"image":{"type":"object","properties":{"pullPolicy":{"type":"string","enum":["Always","Never","IfNotPresent"]},"repository":{"type":"string"},"tag":{"type":"string"}}},"initContainers":{"type":"array","items":{"type":"object"}},"kind":{"type":"string","enum":["StatefulSet","Deployment","DaemonSet"]},"logging":{"type":"object","properties":{"format":{"type":"string","enum":["raw","json"]},"level":{"type":"string","enum":["debug","info","warn","error","fatal"]},"logger":{"type":"string","enum":["glg","zap"]}}},"maxReplicas":{"type":"integer","minimum":0},"maxUnavailable":{"type":"string"},"minReplicas":{"type":"integer","minimum":0},"name":{"type":"string"},"ngt":{"type":"object","properties":{"auto_create_index_pool_size":{"type":"integer"},"auto_index_check_duration":{"type":"string"},"auto_index_duration_limit":{"type":"string"},"auto_index_length":{"type":"integer"},"auto_save_index_duration":{"type":"string"},"bulk_insert_chunk_size":{"type":"integer"},"creation_edge_size":{"type":"integer"},"default_epsilon":{"type":"number"},"default_pool_size":{"type":"integer"},"default_radius":{"type":"number"},"dimension":{"type":"integer","minimum":1},"distance_type":{"type":"string","enum":["l1","l2","angle","hamming","cos","cosine","normalizedangle","normalizedcosine","jaccard"]},"enable_in_memory_mode":{"type":"boolean"},"enable_proactive_gc":{"type":"boolean"},"index_path":{"type":"string"},"initial_delay_max_duration":{"type":"string"},"load_index_timeout_factor":{"type":"string"},"max_load_index_timeout":{"type":"string"},"min_load_index_timeout":{"type":"string"},"object_type":{"type":"string","enum":["float","uint8"]},"search_edge_size":{"type":"integer"}}},"nodeName":{"type":"string"},"nodeSelector":{"type":"object"},"observability":{"type":"object","properties":{"collector":{"type":"object","properties":{"duration":{"type":"string"},"metrics":{"type":"object","properties":{"enable_cgo":{"type":"boolean"},"enable_goroutine":{"type":"boolean"},"enable_memory":{"type":"boolean"},"enable_version_info":{"type":"boolean"},"version_info_labels":{"type":"array","items":{"type":"string","enum":["vald_version","server_name","git_commit","build_time","go_version","go_os","go_arch","cgo_enabled","ngt_version","build_cpu_info_flags"]}}}}}},"enabled":{"type":"boolean"},"jaeger":{"type":"object","properties":{"agent_endpoint":{"type":"string"},"buffer_max_count":{"type":"integer"},"collector_endpoint":{"type":"string"},"enabled":{"type":"boolean"},"password":{"type":"string"},"service_name":{"type":"string"},"username":{"type":"string"}}},"prometheus":{"type":"object","properties":{"enabled":{"type":"boolean"},"endpoint":{"type":"string"},"namespace":{"type":"string"}}},"stackdriver":{"type":"object","properties":{"client":{"type":"object","properties":{"api_key":{"type":"string"},"audiences":{"type":"array","items":{"type":"string"}},"authentication_enabled":{"type":"boolean"},"credentials_file":{"type":"string"},"credentials_json":{"type":"string"},"endpoint":{"type":"string"},"quota_project":{"type":"string"},"request_reason":{"type":"string"},"scopes":{"type":"array","items":{"type":"string"}},"telemetry_enabled":{"type":"boolean"},"user_agent":{"type":"string"}}},"exporter":{"type":"object","properties":{"bundle_count_threshold":{"type":"integer"},"bundle_delay_threshold":{"type":"string"},"location":{"type":"string"},"metric_prefix":{"type":"string"},"monitoring_enabled":{"type":"boolean"},"number_of_workers":{"type":"integer"},"reporting_interval":{"type":"string"},"skip_cmd":{"type":"boolean"},"timeout":{"type":"string"},"trace_spans_buffer_max_bytes":{"type":"integer"},"tracing_enabled":{"type":"boolean"}}},"profiler":{"type":"object","properties":{"alloc_force_gc":{"type":"boolean"},"alloc_profiling":{"type":"boolean"},"ap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diff --git a/go.mod b/go.mod
index 9c9b8e666f..5147e9dd4a 100755
--- a/go.mod
+++ b/go.mod
@@ -5,7 +5,7 @@ go 1.15
 replace (
 	cloud.google.com/go => cloud.google.com/go v0.76.0
 	github.com/Azure/go-autorest => github.com/Azure/go-autorest v14.2.0+incompatible
-	github.com/aws/aws-sdk-go => github.com/aws/aws-sdk-go v1.37.6
+	github.com/aws/aws-sdk-go => github.com/aws/aws-sdk-go v1.37.7
 	github.com/boltdb/bolt => github.com/boltdb/bolt v1.3.1
 	github.com/chzyer/logex => github.com/chzyer/logex v1.1.11-0.20170329064859-445be9e134b2
 	github.com/coreos/etcd => go.etcd.io/etcd v3.3.25+incompatible
@@ -16,7 +16,7 @@ replace (
 	github.com/gogo/googleapis => github.com/gogo/googleapis v1.4.0
 	github.com/gogo/protobuf => github.com/gogo/protobuf v1.3.2
 	github.com/google/go-cmp => github.com/google/go-cmp v0.5.4
-	github.com/google/pprof => github.com/google/pprof v0.0.0-20210125172800-10e9aeb4a998
+	github.com/google/pprof => github.com/google/pprof v0.0.0-20210208152844-1612e9be7af6
 	github.com/googleapis/gnostic => github.com/googleapis/gnostic v0.5.4
 	github.com/gophercloud/gophercloud => github.com/gophercloud/gophercloud v0.15.0
 	github.com/gorilla/websocket => github.com/gorilla/websocket v1.4.2
@@ -79,7 +79,7 @@ require (
 	gonum.org/v1/hdf5 v0.0.0-20200504100616-496fefe91614
 	gonum.org/v1/plot v0.8.1
 	google.golang.org/api v0.39.0
-	google.golang.org/genproto v0.0.0-20210204154452-deb828366460
+	google.golang.org/genproto v0.0.0-20210207032614-bba0dbe2a9ea
 	google.golang.org/grpc v1.35.0
 	gopkg.in/yaml.v2 v2.4.0
 	k8s.io/api v0.20.2
diff --git a/go.sum b/go.sum
index 32bdfc9e39..7ff9ee225a 100644
--- a/go.sum
+++ b/go.sum
@@ -60,8 +60,8 @@ github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hC
 github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
 github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
 github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY=
-github.com/aws/aws-sdk-go v1.37.6 h1:SWYjRvyZw6DJc3pkZfRWVRD/5wiTDuwOkyb89AAkEBY=
-github.com/aws/aws-sdk-go v1.37.6/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
+github.com/aws/aws-sdk-go v1.37.7 h1:vfald/ssuWaA2HgJ9DrieVVXVE9eD0Kly/9kl0hofbE=
+github.com/aws/aws-sdk-go v1.37.7/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
@@ -218,8 +218,8 @@ github.com/google/gofuzz v1.2.0 h1:xRy4A+RhZaiKjJ1bPfwQ8sedCA+YS2YcCHW6ec7JMi0=
 github.com/google/gofuzz v1.2.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/martian/v3 v3.1.0 h1:wCKgOCHuUEVfsaQLpPSJb7VdYCdTVZQAuOdYm1yc/60=
 github.com/google/martian/v3 v3.1.0/go.mod h1:y5Zk1BBys9G+gd6Jrk0W3cC1+ELVxBWuIGO+w/tUAp0=
-github.com/google/pprof v0.0.0-20210125172800-10e9aeb4a998 h1:ruQkWz0PK91vTVrWtzAgv3VqTMgIN1FAIvwWr5MY+GQ=
-github.com/google/pprof v0.0.0-20210125172800-10e9aeb4a998/go.mod h1:kpwsk12EmLew5upagYY7GY0pfYCcupk39gWOCRROcvE=
+github.com/google/pprof v0.0.0-20210208152844-1612e9be7af6 h1:38TDCVodvyooskjOFh+Ve8EY37rS8ZNzEIPHMWZaY/Y=
+github.com/google/pprof v0.0.0-20210208152844-1612e9be7af6/go.mod h1:kpwsk12EmLew5upagYY7GY0pfYCcupk39gWOCRROcvE=
 github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm40UhjYkI=
 github.com/google/uuid v1.0.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
@@ -810,8 +810,8 @@ google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154/go.mod h1:FWY/as6D
 google.golang.org/genproto v0.0.0-20201110150050-8816d57aaa9a/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20201214200347-8c77b98c765d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20210202153253-cf70463f6119/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20210204154452-deb828366460 h1:pvsg2TgyP8bWrYqyL10tbNHu5KypD5DWJPrCjaTkwZA=
-google.golang.org/genproto v0.0.0-20210204154452-deb828366460/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20210207032614-bba0dbe2a9ea h1:N98SvVh7Hdle2lgUVFuIkf0B3u29CUakMUQa7Hwz8Wc=
+google.golang.org/genproto v0.0.0-20210207032614-bba0dbe2a9ea/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v1.35.0 h1:TwIQcH3es+MojMVojxxfQ3l3OF2KzlRxML2xZq0kRo8=
 google.golang.org/grpc v1.35.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
 google.golang.org/protobuf v1.25.0 h1:Ejskq+SyPohKW+1uil0JJMtmHCgJPJ/qWTxr8qp+R4c=
diff --git a/internal/client/v1/client/compressor/client_test.go b/internal/client/v1/client/compressor/client_test.go
index 4347379180..416bca6a1b 100644
--- a/internal/client/v1/client/compressor/client_test.go
+++ b/internal/client/v1/client/compressor/client_test.go
@@ -1000,3 +1000,79 @@ func Test_client_RemoveIPs(t *testing.T) {
 		})
 	}
 }
+
+func Test_client_GRPCClient(t *testing.T) {
+	t.Parallel()
+	type fields struct {
+		client grpc.Client
+	}
+	type want struct {
+		want grpc.Client
+	}
+	type test struct {
+		name       string
+		fields     fields
+		want       want
+		checkFunc  func(want, grpc.Client) error
+		beforeFunc func()
+		afterFunc  func()
+	}
+	defaultCheckFunc := func(w want, got grpc.Client) error {
+		if !reflect.DeepEqual(got, w.want) {
+			return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", got, w.want)
+		}
+		return nil
+	}
+	tests := []test{
+		// TODO test cases
+		/*
+		   {
+		       name: "test_case_1",
+		       fields: fields {
+		           client: nil,
+		       },
+		       want: want{},
+		       checkFunc: defaultCheckFunc,
+		   },
+		*/
+
+		// TODO test cases
+		/*
+		   func() test {
+		       return test {
+		           name: "test_case_2",
+		           fields: fields {
+		           client: nil,
+		           },
+		           want: want{},
+		           checkFunc: defaultCheckFunc,
+		       }
+		   }(),
+		*/
+	}
+
+	for _, tc := range tests {
+		test := tc
+		t.Run(test.name, func(tt *testing.T) {
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, goleak.IgnoreCurrent())
+			if test.beforeFunc != nil {
+				test.beforeFunc()
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc()
+			}
+			if test.checkFunc == nil {
+				test.checkFunc = defaultCheckFunc
+			}
+			c := &client{
+				client: test.fields.client,
+			}
+
+			got := c.GRPCClient()
+			if err := test.checkFunc(test.want, got); err != nil {
+				tt.Errorf("error = %v", err)
+			}
+		})
+	}
+}
diff --git a/internal/errors/errors_test.go b/internal/errors/errors_test.go
index c424dc4df1..22d13dbf16 100644
--- a/internal/errors/errors_test.go
+++ b/internal/errors/errors_test.go
@@ -16,7 +16,6 @@
 package errors
 
 import (
-	"errors"
 	"fmt"
 	"math"
 	"reflect"
@@ -46,7 +45,7 @@ func TestErrTimeoutParseFailed(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			wantErr := errors.New("invalid timeout value: 10hours\t:timeout parse error out put failed")
+			wantErr := New("invalid timeout value: 10hours\t:timeout parse error out put failed")
 			return test{
 				name: "return an ErrTimeoutParseFailed error when timeout is not empty.",
 				args: args{
@@ -58,7 +57,7 @@ func TestErrTimeoutParseFailed(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := errors.New("invalid timeout value: \t:timeout parse error out put failed")
+			wantErr := New("invalid timeout value: \t:timeout parse error out put failed")
 			return test{
 				name: "return an ErrTimeoutParseFailed error when timeout is empty.",
 				args: args{
@@ -114,7 +113,7 @@ func TestErrServerNotFound(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			wantErr := errors.New("server gateway.vald.svc.cluster.local not found")
+			wantErr := New("server gateway.vald.svc.cluster.local not found")
 			return test{
 				name: "return an ErrServerNotFound error when the name is not empty.",
 				args: args{
@@ -126,7 +125,7 @@ func TestErrServerNotFound(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := errors.New("server  not found")
+			wantErr := New("server  not found")
 			return test{
 				name: "return an ErrServerNotFound error when the name is empty.",
 				args: args{
@@ -183,11 +182,11 @@ func TestErrOptionFailed(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			wantErr := errors.New("failed to setup option :\tfmt.Println: option failed error")
+			wantErr := New("failed to setup option :\tfmt.Println: option failed error")
 			return test{
 				name: "return an ErrOptionFailed error when err and ref are not empty.",
 				args: args{
-					err: errors.New("option failed error"),
+					err: New("option failed error"),
 					ref: func() reflect.Value {
 						var i interface{} = fmt.Println
 						return reflect.ValueOf(i)
@@ -199,7 +198,7 @@ func TestErrOptionFailed(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := errors.New("failed to setup option :\t")
+			wantErr := New("failed to setup option :\t")
 			return test{
 				name: "return an ErrOptionFailed error when err is empty and ref is zero value.",
 				args: args{
@@ -214,11 +213,11 @@ func TestErrOptionFailed(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := errors.New("failed to setup option :\t: option failed error")
+			wantErr := New("failed to setup option :\t: option failed error")
 			return test{
 				name: "return an ErrOptionFailed error when err is not empty and ref is nil.",
 				args: args{
-					err: errors.New("option failed error"),
+					err: New("option failed error"),
 				},
 				want: want{
 					wantErr,
@@ -226,7 +225,7 @@ func TestErrOptionFailed(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := errors.New("failed to setup option :\t")
+			wantErr := New("failed to setup option :\t")
 			return test{
 				name: "return an ErrOptionFailed error when err is empty and ref is <invalid reflect.Value>.",
 				args: args{
@@ -282,11 +281,11 @@ func TestErrArgumentPraseFailed(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			wantErr := errors.New("argument parse failed: argument parse error")
+			wantErr := New("argument parse failed: argument parse error")
 			return test{
 				name: "return an ErrArgumentParseFailed error when err is not empty.",
 				args: args{
-					err: errors.New("argument parse error"),
+					err: New("argument parse error"),
 				},
 				want: want{
 					wantErr,
@@ -294,7 +293,7 @@ func TestErrArgumentPraseFailed(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := errors.New("argument parse failed")
+			wantErr := New("argument parse failed")
 			return test{
 				name: "return an ErrArgumentParseFailed error when err is empty.",
 				args: args{},
@@ -348,11 +347,11 @@ func TestErrBackoffTimeout(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			wantErr := errors.New("backoff timeout by limitation: backoff is timeout")
+			wantErr := New("backoff timeout by limitation: backoff is timeout")
 			return test{
 				name: "return an ErrBackoffTimeout error when err is not empty.",
 				args: args{
-					err: errors.New("backoff is timeout"),
+					err: New("backoff is timeout"),
 				},
 				want: want{
 					wantErr,
@@ -360,7 +359,7 @@ func TestErrBackoffTimeout(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := errors.New("backoff timeout by limitation")
+			wantErr := New("backoff timeout by limitation")
 			return test{
 				name: "return an ErrBackoffTimeout error when err is empty.",
 				args: args{},
@@ -515,11 +514,11 @@ func TestErrLoggingRetry(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			wantErr := errors.New("failed to output fmt.Println logs, retrying...: logging retry")
+			wantErr := New("failed to output fmt.Println logs, retrying...: logging retry")
 			return test{
 				name: "return an ErrLoggingRetry error when err and ref are not empty.",
 				args: args{
-					err: errors.New("logging retry"),
+					err: New("logging retry"),
 					ref: func() reflect.Value {
 						var i interface{} = fmt.Println
 						return reflect.ValueOf(i)
@@ -531,11 +530,11 @@ func TestErrLoggingRetry(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := errors.New("failed to output  logs, retrying...: logging retry")
+			wantErr := New("failed to output  logs, retrying...: logging retry")
 			return test{
 				name: "return an ErrLoggingRetry error when err is not empty and ref is nil.",
 				args: args{
-					err: errors.New("logging retry"),
+					err: New("logging retry"),
 				},
 				want: want{
 					wantErr,
@@ -543,7 +542,7 @@ func TestErrLoggingRetry(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := errors.New("failed to output  logs, retrying...")
+			wantErr := New("failed to output  logs, retrying...")
 			return test{
 				name: "return an ErrLoggingRetry error when err is empty and ref is zero value.",
 				args: args{
@@ -558,7 +557,7 @@ func TestErrLoggingRetry(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := errors.New("failed to output  logs, retrying...")
+			wantErr := New("failed to output  logs, retrying...")
 			return test{
 				name: "return an ErrLoggingRetry error when err is empty and ref is <invalid reflect.Value>.",
 				args: args{
@@ -615,11 +614,11 @@ func TestErrLoggingFailed(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			wantErr := errors.New("failed to output fmt.Println logs: logging retry")
+			wantErr := New("failed to output fmt.Println logs: logging retry")
 			return test{
 				name: "return an ErrLoggingFailed error when err and ref are not empty.",
 				args: args{
-					err: errors.New("logging retry"),
+					err: New("logging retry"),
 					ref: func() reflect.Value {
 						var i interface{} = fmt.Println
 						return reflect.ValueOf(i)
@@ -631,11 +630,11 @@ func TestErrLoggingFailed(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := errors.New("failed to output  logs: logging retry")
+			wantErr := New("failed to output  logs: logging retry")
 			return test{
 				name: "return an ErrLoggingFailed error when err is not empty and ref is nil.",
 				args: args{
-					err: errors.New("logging retry"),
+					err: New("logging retry"),
 				},
 				want: want{
 					wantErr,
@@ -643,7 +642,7 @@ func TestErrLoggingFailed(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := errors.New("failed to output  logs")
+			wantErr := New("failed to output  logs")
 			return test{
 				name: "return an ErrLoggingFailed error when err is empty and ref is zero value.",
 				args: args{
@@ -658,7 +657,7 @@ func TestErrLoggingFailed(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := errors.New("failed to output  logs")
+			wantErr := New("failed to output  logs")
 			return test{
 				name: "return an ErrLoggingFailed error when err is empty and ref is <invalid reflect,Value>.",
 				args: args{
@@ -714,7 +713,7 @@ func TestNew(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			wantErr := errors.New("error is occurred")
+			wantErr := New("error is occurred")
 			return test{
 				name: "return a New error when msg is not empty.",
 				args: args{
@@ -782,7 +781,7 @@ func TestWrap(t *testing.T) {
 			return test{
 				name: "return an error when err and msg are not empty.",
 				args: args{
-					err: errors.New("err"),
+					err: New("err"),
 					msg: "error is occurred",
 				},
 				want: want{
@@ -791,11 +790,11 @@ func TestWrap(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := errors.New("err")
+			wantErr := New("err")
 			return test{
 				name: "return an error when err is not empty and msg is empty.",
 				args: args{
-					err: errors.New("err"),
+					err: New("err"),
 				},
 				want: want{
 					wantErr,
@@ -803,7 +802,7 @@ func TestWrap(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := errors.New("error is occurred")
+			wantErr := New("error is occurred")
 			return test{
 				name: "return an error when err is empty and msg is not empty.",
 				args: args{
@@ -868,7 +867,7 @@ func TestWrapf(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			err := errors.New("err: ")
+			err := New("err: ")
 			format := "error is occurred: %v"
 			val := []interface{}{
 				"timeout error",
@@ -887,7 +886,7 @@ func TestWrapf(t *testing.T) {
 			}
 		}(),
 		func() test {
-			err := errors.New("err: ")
+			err := New("err: ")
 			format := "error is occurred: %v : %v"
 			val := []interface{}{
 				"invalid time_duration",
@@ -907,7 +906,7 @@ func TestWrapf(t *testing.T) {
 			}
 		}(),
 		func() test {
-			err := errors.New("err: ")
+			err := New("err: ")
 			val := []interface{}{
 				"invalid time_duration",
 				10,
@@ -925,7 +924,7 @@ func TestWrapf(t *testing.T) {
 			}
 		}(),
 		func() test {
-			err := errors.New("err: ")
+			err := New("err: ")
 			format := "error is occurred: %v : %v"
 			wantErr := err
 			return test{
@@ -940,7 +939,7 @@ func TestWrapf(t *testing.T) {
 			}
 		}(),
 		func() test {
-			err := errors.New("err: ")
+			err := New("err: ")
 			wantErr := err
 			return test{
 				name: "return an error when err is not empty and format and args are empty.",
@@ -972,7 +971,7 @@ func TestWrapf(t *testing.T) {
 		}(),
 		func() test {
 			format := "error is occurred: %v : %v"
-			wantErr := errors.New(format)
+			wantErr := New(format)
 			return test{
 				name: "return an error when err and args are empty and format is not empty.",
 				args: args{
@@ -1066,11 +1065,11 @@ func TestCause(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			wantErr := errors.Unwrap(Wrap(errors.New("err"), "invalid parameter"))
+			wantErr := Unwrap(Wrap(New("err"), "invalid parameter"))
 			return test{
 				name: "return an unwrapped error when err is not empty.",
 				args: args{
-					err: Wrap(errors.New("err"), "invalid parameter"),
+					err: Wrap(New("err"), "invalid parameter"),
 				},
 				want: want{
 					wantErr,
@@ -1129,7 +1128,7 @@ func TestUnwarp(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			wantErr := errors.New("err")
+			wantErr := New("err")
 			err := fmt.Errorf("%s: %w", "error occurs", wantErr)
 			return test{
 				name: "return an unwrapped error when err is not empty.",
@@ -1355,15 +1354,15 @@ func TestIs(t *testing.T) {
 		{
 			name: "return false when target is nil.",
 			args: args{
-				err: errors.New("invalid parameter"),
+				err: New("invalid parameter"),
 			},
 			want: want{},
 		},
 		{
 			name: "return true when err is same comparable errors type and same error as target.",
 			args: args{
-				err:    errors.New("invalid parameter"),
-				target: errors.New("invalid parameter"),
+				err:    New("invalid parameter"),
+				target: New("invalid parameter"),
 			},
 			want: want{
 				true,
@@ -1372,15 +1371,15 @@ func TestIs(t *testing.T) {
 		{
 			name: "return false when err is same comparable errors type and differ error as target.",
 			args: args{
-				err:    errors.New(""),
-				target: errors.New("err is occurred"),
+				err:    New(""),
+				target: New("err is occurred"),
 			},
 			want: want{},
 		},
 		{
 			name: "return true when err is comparable error and target is uncomparable error and both err msg is same.",
 			args: args{
-				err: errors.New("err is occurred"),
+				err: New("err is occurred"),
 				target: uncomparableErr{
 					[]interErr{
 						{
@@ -1396,7 +1395,7 @@ func TestIs(t *testing.T) {
 		{
 			name: "return false when err is comparable error and target is uncomparable error and both err msg is not same.",
 			args: args{
-				err: errors.New("err is occurred"),
+				err: New("err is occurred"),
 				target: uncomparableErr{
 					[]interErr{
 						{
@@ -1411,7 +1410,7 @@ func TestIs(t *testing.T) {
 			name: "return true when err is wrapped comparable error and target is uncomparable error and err.err.Error() and target msg are same.",
 			args: args{
 				err: wrapErr{
-					err: errors.New("invalid parameter"),
+					err: New("invalid parameter"),
 				},
 				target: uncomparableErr{
 					[]interErr{
@@ -1429,7 +1428,7 @@ func TestIs(t *testing.T) {
 			name: "return false when err is wrapped comparable error and target is uncomparable error and err.err.Error() and target msg are not same.",
 			args: args{
 				err: wrapErr{
-					err: errors.New("err is occurred"),
+					err: New("err is occurred"),
 				},
 				target: uncomparableErr{
 					[]interErr{
@@ -1445,7 +1444,7 @@ func TestIs(t *testing.T) {
 			name: "return false when err is comparable error with Is() implemented and target is uncomparable error and target msg is empty.",
 			args: args{
 				err: isErr{
-					err: errors.New("err is occurred"),
+					err: New("err is occurred"),
 				},
 				target: uncomparableErr{},
 			},
@@ -1455,7 +1454,7 @@ func TestIs(t *testing.T) {
 			name: "return true when err is comparable error with Is() implemented and target is uncomparable error and target msg is not empty.",
 			args: args{
 				err: isErr{
-					err: errors.New("err is occurred"),
+					err: New("err is occurred"),
 				},
 				target: uncomparableErr{
 					[]interErr{
@@ -1517,8 +1516,8 @@ func TestAs(t *testing.T) {
 		{
 			name: "return true when err and target is not empty.",
 			args: args{
-				err:    errors.New("err"),
-				target: errors.New("err is occurred"),
+				err:    New("err"),
+				target: New("err is occurred"),
 			},
 			want: want{
 				true,
diff --git a/internal/k8s/option_test.go b/internal/k8s/option_test.go
index f4db769793..16cb56cea5 100644
--- a/internal/k8s/option_test.go
+++ b/internal/k8s/option_test.go
@@ -21,6 +21,7 @@ import (
 	"testing"
 
 	"github.com/vdaas/vald/internal/errgroup"
+	"github.com/vdaas/vald/internal/net/tcp"
 	"go.uber.org/goleak"
 	"sigs.k8s.io/controller-runtime/pkg/manager"
 )
@@ -823,3 +824,120 @@ func TestWithDisableLeaderElection(t *testing.T) {
 		})
 	}
 }
+
+func TestWithDialer(t *testing.T) {
+	t.Parallel()
+	// Change interface type to the type of object you are testing
+	type T = interface{}
+	type args struct {
+		der tcp.Dialer
+	}
+	type want struct {
+		obj *T
+		// Uncomment this line if the option returns an error, otherwise delete it
+		// err error
+	}
+	type test struct {
+		name string
+		args args
+		want want
+		// Use the first line if the option returns an error. otherwise use the second line
+		// checkFunc  func(want, *T, error) error
+		// checkFunc  func(want, *T) error
+		beforeFunc func(args)
+		afterFunc  func(args)
+	}
+
+	// Uncomment this block if the option returns an error, otherwise delete it
+	/*
+	   defaultCheckFunc := func(w want, obj *T, err error) error {
+	       if !errors.Is(err, w.err) {
+	           return errors.Errorf("got_error: \"%#v\",\n\t\t\t\twant: \"%#v\"", err, w.err)
+	       }
+	       if !reflect.DeepEqual(obj, w.obj) {
+	           return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", obj, w.obj)
+	       }
+	       return nil
+	   }
+	*/
+
+	// Uncomment this block if the option do not returns an error, otherwise delete it
+	/*
+	   defaultCheckFunc := func(w want, obj *T) error {
+	       if !reflect.DeepEqual(obj, w.obj) {
+	           return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", obj, w.obj)
+	       }
+	       return nil
+	   }
+	*/
+
+	tests := []test{
+		// TODO test cases
+		/*
+		   {
+		       name: "test_case_1",
+		       args: args {
+		           der: nil,
+		       },
+		       want: want {
+		           obj: new(T),
+		       },
+		   },
+		*/
+
+		// TODO test cases
+		/*
+		   func() test {
+		       return test {
+		           name: "test_case_2",
+		           args: args {
+		           der: nil,
+		           },
+		           want: want {
+		               obj: new(T),
+		           },
+		       }
+		   }(),
+		*/
+	}
+
+	for _, tc := range tests {
+		test := tc
+		t.Run(test.name, func(tt *testing.T) {
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, goleak.IgnoreCurrent())
+			if test.beforeFunc != nil {
+				test.beforeFunc(test.args)
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc(test.args)
+			}
+
+			// Uncomment this block if the option returns an error, otherwise delete it
+			/*
+			   if test.checkFunc == nil {
+			       test.checkFunc = defaultCheckFunc
+			   }
+
+			   got := WithDialer(test.args.der)
+			   obj := new(T)
+			   if err := test.checkFunc(test.want, obj, got(obj)); err != nil {
+			       tt.Errorf("error = %v", err)
+			   }
+			*/
+
+			// Uncomment this block if the option do not return an error, otherwise delete it
+			/*
+			   if test.checkFunc == nil {
+			       test.checkFunc = defaultCheckFunc
+			   }
+			   got := WithDialer(test.args.der)
+			   obj := new(T)
+			   got(obj)
+			   if err := test.checkFunc(test.want, obj); err != nil {
+			       tt.Errorf("error = %v", err)
+			   }
+			*/
+		})
+	}
+}
diff --git a/internal/net/grpc/errdetails/errdetails_test.go b/internal/net/grpc/errdetails/errdetails_test.go
new file mode 100644
index 0000000000..f65e586179
--- /dev/null
+++ b/internal/net/grpc/errdetails/errdetails_test.go
@@ -0,0 +1,492 @@
+//
+// Copyright (C) 2019-2021 vdaas.org vald team <vald@vdaas.org>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+// Package errdetails provides error detail for grpc status
+package errdetails
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/vdaas/vald/internal/errors"
+	"github.com/vdaas/vald/internal/net/grpc/types"
+	"go.uber.org/goleak"
+)
+
+func TestErrorDetails_String(t *testing.T) {
+	t.Parallel()
+	type fields struct {
+		Code    int32
+		Message string
+		Error   error
+		Details []*ErrorDetails
+	}
+	type want struct {
+		want string
+	}
+	type test struct {
+		name       string
+		fields     fields
+		want       want
+		checkFunc  func(want, string) error
+		beforeFunc func()
+		afterFunc  func()
+	}
+	defaultCheckFunc := func(w want, got string) error {
+		if !reflect.DeepEqual(got, w.want) {
+			return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", got, w.want)
+		}
+		return nil
+	}
+	tests := []test{
+		// TODO test cases
+		/*
+		   {
+		       name: "test_case_1",
+		       fields: fields {
+		           Code: 0,
+		           Message: "",
+		           Error: nil,
+		           Details: nil,
+		       },
+		       want: want{},
+		       checkFunc: defaultCheckFunc,
+		   },
+		*/
+
+		// TODO test cases
+		/*
+		   func() test {
+		       return test {
+		           name: "test_case_2",
+		           fields: fields {
+		           Code: 0,
+		           Message: "",
+		           Error: nil,
+		           Details: nil,
+		           },
+		           want: want{},
+		           checkFunc: defaultCheckFunc,
+		       }
+		   }(),
+		*/
+	}
+
+	for _, tc := range tests {
+		test := tc
+		t.Run(test.name, func(tt *testing.T) {
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, goleak.IgnoreCurrent())
+			if test.beforeFunc != nil {
+				test.beforeFunc()
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc()
+			}
+			if test.checkFunc == nil {
+				test.checkFunc = defaultCheckFunc
+			}
+			e := &ErrorDetails{
+				Code:    test.fields.Code,
+				Message: test.fields.Message,
+				Error:   test.fields.Error,
+				Details: test.fields.Details,
+			}
+
+			got := e.String()
+			if err := test.checkFunc(test.want, got); err != nil {
+				tt.Errorf("error = %v", err)
+			}
+		})
+	}
+}
+
+func TestDecodeErrorDetails(t *testing.T) {
+	t.Parallel()
+	type args struct {
+		objs []interface{}
+	}
+	type want struct {
+		wantEs []*ErrorDetails
+	}
+	type test struct {
+		name       string
+		args       args
+		want       want
+		checkFunc  func(want, []*ErrorDetails) error
+		beforeFunc func(args)
+		afterFunc  func(args)
+	}
+	defaultCheckFunc := func(w want, gotEs []*ErrorDetails) error {
+		if !reflect.DeepEqual(gotEs, w.wantEs) {
+			return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", gotEs, w.wantEs)
+		}
+		return nil
+	}
+	tests := []test{
+		// TODO test cases
+		/*
+		   {
+		       name: "test_case_1",
+		       args: args {
+		           objs: nil,
+		       },
+		       want: want{},
+		       checkFunc: defaultCheckFunc,
+		   },
+		*/
+
+		// TODO test cases
+		/*
+		   func() test {
+		       return test {
+		           name: "test_case_2",
+		           args: args {
+		           objs: nil,
+		           },
+		           want: want{},
+		           checkFunc: defaultCheckFunc,
+		       }
+		   }(),
+		*/
+	}
+
+	for _, tc := range tests {
+		test := tc
+		t.Run(test.name, func(tt *testing.T) {
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, goleak.IgnoreCurrent())
+			if test.beforeFunc != nil {
+				test.beforeFunc(test.args)
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc(test.args)
+			}
+			if test.checkFunc == nil {
+				test.checkFunc = defaultCheckFunc
+			}
+
+			gotEs := DecodeErrorDetails(test.args.objs...)
+			if err := test.checkFunc(test.want, gotEs); err != nil {
+				tt.Errorf("error = %v", err)
+			}
+		})
+	}
+}
+
+func TestSerialize(t *testing.T) {
+	t.Parallel()
+	type args struct {
+		objs []interface{}
+	}
+	type want struct {
+		want string
+	}
+	type test struct {
+		name       string
+		args       args
+		want       want
+		checkFunc  func(want, string) error
+		beforeFunc func(args)
+		afterFunc  func(args)
+	}
+	defaultCheckFunc := func(w want, got string) error {
+		if !reflect.DeepEqual(got, w.want) {
+			return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", got, w.want)
+		}
+		return nil
+	}
+	tests := []test{
+		// TODO test cases
+		/*
+		   {
+		       name: "test_case_1",
+		       args: args {
+		           objs: nil,
+		       },
+		       want: want{},
+		       checkFunc: defaultCheckFunc,
+		   },
+		*/
+
+		// TODO test cases
+		/*
+		   func() test {
+		       return test {
+		           name: "test_case_2",
+		           args: args {
+		           objs: nil,
+		           },
+		           want: want{},
+		           checkFunc: defaultCheckFunc,
+		       }
+		   }(),
+		*/
+	}
+
+	for _, tc := range tests {
+		test := tc
+		t.Run(test.name, func(tt *testing.T) {
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, goleak.IgnoreCurrent())
+			if test.beforeFunc != nil {
+				test.beforeFunc(test.args)
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc(test.args)
+			}
+			if test.checkFunc == nil {
+				test.checkFunc = defaultCheckFunc
+			}
+
+			got := Serialize(test.args.objs...)
+			if err := test.checkFunc(test.want, got); err != nil {
+				tt.Errorf("error = %v", err)
+			}
+		})
+	}
+}
+
+func TestDecodeDetail(t *testing.T) {
+	t.Parallel()
+	type args struct {
+		detail *types.Any
+	}
+	type want struct {
+		wantData interface{}
+		err      error
+	}
+	type test struct {
+		name       string
+		args       args
+		want       want
+		checkFunc  func(want, interface{}, error) error
+		beforeFunc func(args)
+		afterFunc  func(args)
+	}
+	defaultCheckFunc := func(w want, gotData interface{}, err error) error {
+		if !errors.Is(err, w.err) {
+			return errors.Errorf("got_error: \"%#v\",\n\t\t\t\twant: \"%#v\"", err, w.err)
+		}
+		if !reflect.DeepEqual(gotData, w.wantData) {
+			return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", gotData, w.wantData)
+		}
+		return nil
+	}
+	tests := []test{
+		// TODO test cases
+		/*
+		   {
+		       name: "test_case_1",
+		       args: args {
+		           detail: nil,
+		       },
+		       want: want{},
+		       checkFunc: defaultCheckFunc,
+		   },
+		*/
+
+		// TODO test cases
+		/*
+		   func() test {
+		       return test {
+		           name: "test_case_2",
+		           args: args {
+		           detail: nil,
+		           },
+		           want: want{},
+		           checkFunc: defaultCheckFunc,
+		       }
+		   }(),
+		*/
+	}
+
+	for _, tc := range tests {
+		test := tc
+		t.Run(test.name, func(tt *testing.T) {
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, goleak.IgnoreCurrent())
+			if test.beforeFunc != nil {
+				test.beforeFunc(test.args)
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc(test.args)
+			}
+			if test.checkFunc == nil {
+				test.checkFunc = defaultCheckFunc
+			}
+
+			gotData, err := DecodeDetail(test.args.detail)
+			if err := test.checkFunc(test.want, gotData, err); err != nil {
+				tt.Errorf("error = %v", err)
+			}
+		})
+	}
+}
+
+func TestDecodeDetails(t *testing.T) {
+	t.Parallel()
+	type args struct {
+		details []*types.Any
+	}
+	type want struct {
+		wantDs []interface{}
+		err    error
+	}
+	type test struct {
+		name       string
+		args       args
+		want       want
+		checkFunc  func(want, []interface{}, error) error
+		beforeFunc func(args)
+		afterFunc  func(args)
+	}
+	defaultCheckFunc := func(w want, gotDs []interface{}, err error) error {
+		if !errors.Is(err, w.err) {
+			return errors.Errorf("got_error: \"%#v\",\n\t\t\t\twant: \"%#v\"", err, w.err)
+		}
+		if !reflect.DeepEqual(gotDs, w.wantDs) {
+			return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", gotDs, w.wantDs)
+		}
+		return nil
+	}
+	tests := []test{
+		// TODO test cases
+		/*
+		   {
+		       name: "test_case_1",
+		       args: args {
+		           details: nil,
+		       },
+		       want: want{},
+		       checkFunc: defaultCheckFunc,
+		   },
+		*/
+
+		// TODO test cases
+		/*
+		   func() test {
+		       return test {
+		           name: "test_case_2",
+		           args: args {
+		           details: nil,
+		           },
+		           want: want{},
+		           checkFunc: defaultCheckFunc,
+		       }
+		   }(),
+		*/
+	}
+
+	for _, tc := range tests {
+		test := tc
+		t.Run(test.name, func(tt *testing.T) {
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, goleak.IgnoreCurrent())
+			if test.beforeFunc != nil {
+				test.beforeFunc(test.args)
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc(test.args)
+			}
+			if test.checkFunc == nil {
+				test.checkFunc = defaultCheckFunc
+			}
+
+			gotDs, err := DecodeDetails(test.args.details...)
+			if err := test.checkFunc(test.want, gotDs, err); err != nil {
+				tt.Errorf("error = %v", err)
+			}
+		})
+	}
+}
+
+func TestDecodeDetailsToString(t *testing.T) {
+	t.Parallel()
+	type args struct {
+		details []*types.Any
+	}
+	type want struct {
+		wantMsg string
+		err     error
+	}
+	type test struct {
+		name       string
+		args       args
+		want       want
+		checkFunc  func(want, string, error) error
+		beforeFunc func(args)
+		afterFunc  func(args)
+	}
+	defaultCheckFunc := func(w want, gotMsg string, err error) error {
+		if !errors.Is(err, w.err) {
+			return errors.Errorf("got_error: \"%#v\",\n\t\t\t\twant: \"%#v\"", err, w.err)
+		}
+		if !reflect.DeepEqual(gotMsg, w.wantMsg) {
+			return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", gotMsg, w.wantMsg)
+		}
+		return nil
+	}
+	tests := []test{
+		// TODO test cases
+		/*
+		   {
+		       name: "test_case_1",
+		       args: args {
+		           details: nil,
+		       },
+		       want: want{},
+		       checkFunc: defaultCheckFunc,
+		   },
+		*/
+
+		// TODO test cases
+		/*
+		   func() test {
+		       return test {
+		           name: "test_case_2",
+		           args: args {
+		           details: nil,
+		           },
+		           want: want{},
+		           checkFunc: defaultCheckFunc,
+		       }
+		   }(),
+		*/
+	}
+
+	for _, tc := range tests {
+		test := tc
+		t.Run(test.name, func(tt *testing.T) {
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, goleak.IgnoreCurrent())
+			if test.beforeFunc != nil {
+				test.beforeFunc(test.args)
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc(test.args)
+			}
+			if test.checkFunc == nil {
+				test.checkFunc = defaultCheckFunc
+			}
+
+			gotMsg, err := DecodeDetailsToString(test.args.details...)
+			if err := test.checkFunc(test.want, gotMsg, err); err != nil {
+				tt.Errorf("error = %v", err)
+			}
+		})
+	}
+}
diff --git a/internal/net/grpc/types/types_test.go b/internal/net/grpc/types/types_test.go
new file mode 100644
index 0000000000..430a209c56
--- /dev/null
+++ b/internal/net/grpc/types/types_test.go
@@ -0,0 +1,102 @@
+//
+// Copyright (C) 2019-2021 vdaas.org vald team <vald@vdaas.org>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+// Package types provides alias of protobuf library types
+package types
+
+import (
+	"testing"
+
+	"github.com/gogo/protobuf/proto"
+	"github.com/vdaas/vald/internal/errors"
+	"go.uber.org/goleak"
+)
+
+func TestUnmarshalAny(t *testing.T) {
+	t.Parallel()
+	type args struct {
+		any *Any
+		pb  proto.Message
+	}
+	type want struct {
+		err error
+	}
+	type test struct {
+		name       string
+		args       args
+		want       want
+		checkFunc  func(want, error) error
+		beforeFunc func(args)
+		afterFunc  func(args)
+	}
+	defaultCheckFunc := func(w want, err error) error {
+		if !errors.Is(err, w.err) {
+			return errors.Errorf("got_error: \"%#v\",\n\t\t\t\twant: \"%#v\"", err, w.err)
+		}
+		return nil
+	}
+	tests := []test{
+		// TODO test cases
+		/*
+		   {
+		       name: "test_case_1",
+		       args: args {
+		           any: nil,
+		           pb: nil,
+		       },
+		       want: want{},
+		       checkFunc: defaultCheckFunc,
+		   },
+		*/
+
+		// TODO test cases
+		/*
+		   func() test {
+		       return test {
+		           name: "test_case_2",
+		           args: args {
+		           any: nil,
+		           pb: nil,
+		           },
+		           want: want{},
+		           checkFunc: defaultCheckFunc,
+		       }
+		   }(),
+		*/
+	}
+
+	for _, tc := range tests {
+		test := tc
+		t.Run(test.name, func(tt *testing.T) {
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, goleak.IgnoreCurrent())
+			if test.beforeFunc != nil {
+				test.beforeFunc(test.args)
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc(test.args)
+			}
+			if test.checkFunc == nil {
+				test.checkFunc = defaultCheckFunc
+			}
+
+			err := UnmarshalAny(test.args.any, test.args.pb)
+			if err := test.checkFunc(test.want, err); err != nil {
+				tt.Errorf("error = %v", err)
+			}
+		})
+	}
+}
diff --git a/internal/net/net_test.go b/internal/net/net_test.go
index 8030688340..a00f4f5082 100644
--- a/internal/net/net_test.go
+++ b/internal/net/net_test.go
@@ -943,3 +943,79 @@ func TestLoadLocalIP(t *testing.T) {
 		})
 	}
 }
+
+func TestJoinHostPort(t *testing.T) {
+	t.Parallel()
+	type args struct {
+		host string
+		port string
+	}
+	type want struct {
+		want string
+	}
+	type test struct {
+		name       string
+		args       args
+		want       want
+		checkFunc  func(want, string) error
+		beforeFunc func(args)
+		afterFunc  func(args)
+	}
+	defaultCheckFunc := func(w want, got string) error {
+		if !reflect.DeepEqual(got, w.want) {
+			return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", got, w.want)
+		}
+		return nil
+	}
+	tests := []test{
+		// TODO test cases
+		/*
+		   {
+		       name: "test_case_1",
+		       args: args {
+		           host: "",
+		           port: "",
+		       },
+		       want: want{},
+		       checkFunc: defaultCheckFunc,
+		   },
+		*/
+
+		// TODO test cases
+		/*
+		   func() test {
+		       return test {
+		           name: "test_case_2",
+		           args: args {
+		           host: "",
+		           port: "",
+		           },
+		           want: want{},
+		           checkFunc: defaultCheckFunc,
+		       }
+		   }(),
+		*/
+	}
+
+	for _, tc := range tests {
+		test := tc
+		t.Run(test.name, func(tt *testing.T) {
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, goleak.IgnoreCurrent())
+			if test.beforeFunc != nil {
+				test.beforeFunc(test.args)
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc(test.args)
+			}
+			if test.checkFunc == nil {
+				test.checkFunc = defaultCheckFunc
+			}
+
+			got := JoinHostPort(test.args.host, test.args.port)
+			if err := test.checkFunc(test.want, got); err != nil {
+				tt.Errorf("error = %v", err)
+			}
+		})
+	}
+}
diff --git a/internal/net/tcp/dialer_test.go b/internal/net/tcp/dialer_test.go
index 41872e213d..6a7911af65 100644
--- a/internal/net/tcp/dialer_test.go
+++ b/internal/net/tcp/dialer_test.go
@@ -19,6 +19,7 @@ package tcp
 
 import (
 	"context"
+	"crypto/tls"
 	stderrors "errors"
 	"fmt"
 	"io/ioutil"
@@ -30,6 +31,7 @@ import (
 	"reflect"
 	"strconv"
 	"strings"
+	"sync"
 	"sync/atomic"
 	"testing"
 	"time"
@@ -1731,3 +1733,159 @@ func Test_dialer_cacheExpireHook(t *testing.T) {
 		})
 	}
 }
+
+func Test_dialer_tlsHandshake(t *testing.T) {
+	t.Parallel()
+	type args struct {
+		ctx  context.Context
+		conn net.Conn
+		addr string
+	}
+	type fields struct {
+		cache                 cache.Cache
+		dnsCache              bool
+		dnsCachedOnce         sync.Once
+		tlsConfig             *tls.Config
+		dnsRefreshDurationStr string
+		dnsCacheExpirationStr string
+		dnsRefreshDuration    time.Duration
+		dnsCacheExpiration    time.Duration
+		dialerTimeout         time.Duration
+		dialerKeepAlive       time.Duration
+		dialerFallbackDelay   time.Duration
+		dialerDualStack       bool
+		addrs                 sync.Map
+		der                   *net.Dialer
+		dialer                func(ctx context.Context, network, addr string) (net.Conn, error)
+		eg                    errgroup.Group
+	}
+	type want struct {
+		want *tls.Conn
+		err  error
+	}
+	type test struct {
+		name       string
+		args       args
+		fields     fields
+		want       want
+		checkFunc  func(want, *tls.Conn, error) error
+		beforeFunc func(args)
+		afterFunc  func(args)
+	}
+	defaultCheckFunc := func(w want, got *tls.Conn, err error) error {
+		if !errors.Is(err, w.err) {
+			return errors.Errorf("got_error: \"%#v\",\n\t\t\t\twant: \"%#v\"", err, w.err)
+		}
+		if !reflect.DeepEqual(got, w.want) {
+			return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", got, w.want)
+		}
+		return nil
+	}
+	tests := []test{
+		// TODO test cases
+		/*
+		   {
+		       name: "test_case_1",
+		       args: args {
+		           ctx: nil,
+		           conn: nil,
+		           addr: "",
+		       },
+		       fields: fields {
+		           cache: nil,
+		           dnsCache: false,
+		           dnsCachedOnce: sync.Once{},
+		           tlsConfig: nil,
+		           dnsRefreshDurationStr: "",
+		           dnsCacheExpirationStr: "",
+		           dnsRefreshDuration: nil,
+		           dnsCacheExpiration: nil,
+		           dialerTimeout: nil,
+		           dialerKeepAlive: nil,
+		           dialerFallbackDelay: nil,
+		           dialerDualStack: false,
+		           addrs: sync.Map{},
+		           der: nil,
+		           dialer: nil,
+		           eg: nil,
+		       },
+		       want: want{},
+		       checkFunc: defaultCheckFunc,
+		   },
+		*/
+
+		// TODO test cases
+		/*
+		   func() test {
+		       return test {
+		           name: "test_case_2",
+		           args: args {
+		           ctx: nil,
+		           conn: nil,
+		           addr: "",
+		           },
+		           fields: fields {
+		           cache: nil,
+		           dnsCache: false,
+		           dnsCachedOnce: sync.Once{},
+		           tlsConfig: nil,
+		           dnsRefreshDurationStr: "",
+		           dnsCacheExpirationStr: "",
+		           dnsRefreshDuration: nil,
+		           dnsCacheExpiration: nil,
+		           dialerTimeout: nil,
+		           dialerKeepAlive: nil,
+		           dialerFallbackDelay: nil,
+		           dialerDualStack: false,
+		           addrs: sync.Map{},
+		           der: nil,
+		           dialer: nil,
+		           eg: nil,
+		           },
+		           want: want{},
+		           checkFunc: defaultCheckFunc,
+		       }
+		   }(),
+		*/
+	}
+
+	for _, tc := range tests {
+		test := tc
+		t.Run(test.name, func(tt *testing.T) {
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, goleak.IgnoreCurrent())
+			if test.beforeFunc != nil {
+				test.beforeFunc(test.args)
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc(test.args)
+			}
+			if test.checkFunc == nil {
+				test.checkFunc = defaultCheckFunc
+			}
+			d := &dialer{
+				cache:                 test.fields.cache,
+				dnsCache:              test.fields.dnsCache,
+				dnsCachedOnce:         test.fields.dnsCachedOnce,
+				tlsConfig:             test.fields.tlsConfig,
+				dnsRefreshDurationStr: test.fields.dnsRefreshDurationStr,
+				dnsCacheExpirationStr: test.fields.dnsCacheExpirationStr,
+				dnsRefreshDuration:    test.fields.dnsRefreshDuration,
+				dnsCacheExpiration:    test.fields.dnsCacheExpiration,
+				dialerTimeout:         test.fields.dialerTimeout,
+				dialerKeepAlive:       test.fields.dialerKeepAlive,
+				dialerFallbackDelay:   test.fields.dialerFallbackDelay,
+				dialerDualStack:       test.fields.dialerDualStack,
+				addrs:                 test.fields.addrs,
+				der:                   test.fields.der,
+				dialer:                test.fields.dialer,
+				eg:                    test.fields.eg,
+			}
+
+			got, err := d.tlsHandshake(test.args.ctx, test.args.conn, test.args.addr)
+			if err := test.checkFunc(test.want, got, err); err != nil {
+				tt.Errorf("error = %v", err)
+			}
+		})
+	}
+}
diff --git a/internal/net/tcp/option_test.go b/internal/net/tcp/option_test.go
index f711cb6f80..daad0bf350 100644
--- a/internal/net/tcp/option_test.go
+++ b/internal/net/tcp/option_test.go
@@ -25,6 +25,7 @@ import (
 
 	"github.com/vdaas/vald/internal/cache"
 	"github.com/vdaas/vald/internal/cache/gache"
+	"github.com/vdaas/vald/internal/errgroup"
 	"github.com/vdaas/vald/internal/errors"
 	"go.uber.org/goleak"
 )
@@ -702,3 +703,237 @@ func TestWithDisableDialerDualStack(t *testing.T) {
 		})
 	}
 }
+
+func TestWithDialerFallbackDelay(t *testing.T) {
+	t.Parallel()
+	// Change interface type to the type of object you are testing
+	type T = interface{}
+	type args struct {
+		dur string
+	}
+	type want struct {
+		obj *T
+		// Uncomment this line if the option returns an error, otherwise delete it
+		// err error
+	}
+	type test struct {
+		name string
+		args args
+		want want
+		// Use the first line if the option returns an error. otherwise use the second line
+		// checkFunc  func(want, *T, error) error
+		// checkFunc  func(want, *T) error
+		beforeFunc func(args)
+		afterFunc  func(args)
+	}
+
+	// Uncomment this block if the option returns an error, otherwise delete it
+	/*
+	   defaultCheckFunc := func(w want, obj *T, err error) error {
+	       if !errors.Is(err, w.err) {
+	           return errors.Errorf("got_error: \"%#v\",\n\t\t\t\twant: \"%#v\"", err, w.err)
+	       }
+	       if !reflect.DeepEqual(obj, w.obj) {
+	           return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", obj, w.obj)
+	       }
+	       return nil
+	   }
+	*/
+
+	// Uncomment this block if the option do not returns an error, otherwise delete it
+	/*
+	   defaultCheckFunc := func(w want, obj *T) error {
+	       if !reflect.DeepEqual(obj, w.obj) {
+	           return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", obj, w.obj)
+	       }
+	       return nil
+	   }
+	*/
+
+	tests := []test{
+		// TODO test cases
+		/*
+		   {
+		       name: "test_case_1",
+		       args: args {
+		           dur: "",
+		       },
+		       want: want {
+		           obj: new(T),
+		       },
+		   },
+		*/
+
+		// TODO test cases
+		/*
+		   func() test {
+		       return test {
+		           name: "test_case_2",
+		           args: args {
+		           dur: "",
+		           },
+		           want: want {
+		               obj: new(T),
+		           },
+		       }
+		   }(),
+		*/
+	}
+
+	for _, tc := range tests {
+		test := tc
+		t.Run(test.name, func(tt *testing.T) {
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, goleak.IgnoreCurrent())
+			if test.beforeFunc != nil {
+				test.beforeFunc(test.args)
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc(test.args)
+			}
+
+			// Uncomment this block if the option returns an error, otherwise delete it
+			/*
+			   if test.checkFunc == nil {
+			       test.checkFunc = defaultCheckFunc
+			   }
+
+			   got := WithDialerFallbackDelay(test.args.dur)
+			   obj := new(T)
+			   if err := test.checkFunc(test.want, obj, got(obj)); err != nil {
+			       tt.Errorf("error = %v", err)
+			   }
+			*/
+
+			// Uncomment this block if the option do not return an error, otherwise delete it
+			/*
+			   if test.checkFunc == nil {
+			       test.checkFunc = defaultCheckFunc
+			   }
+			   got := WithDialerFallbackDelay(test.args.dur)
+			   obj := new(T)
+			   got(obj)
+			   if err := test.checkFunc(test.want, obj); err != nil {
+			       tt.Errorf("error = %v", err)
+			   }
+			*/
+		})
+	}
+}
+
+func TestWithErrGroup(t *testing.T) {
+	t.Parallel()
+	// Change interface type to the type of object you are testing
+	type T = interface{}
+	type args struct {
+		eg errgroup.Group
+	}
+	type want struct {
+		obj *T
+		// Uncomment this line if the option returns an error, otherwise delete it
+		// err error
+	}
+	type test struct {
+		name string
+		args args
+		want want
+		// Use the first line if the option returns an error. otherwise use the second line
+		// checkFunc  func(want, *T, error) error
+		// checkFunc  func(want, *T) error
+		beforeFunc func(args)
+		afterFunc  func(args)
+	}
+
+	// Uncomment this block if the option returns an error, otherwise delete it
+	/*
+	   defaultCheckFunc := func(w want, obj *T, err error) error {
+	       if !errors.Is(err, w.err) {
+	           return errors.Errorf("got_error: \"%#v\",\n\t\t\t\twant: \"%#v\"", err, w.err)
+	       }
+	       if !reflect.DeepEqual(obj, w.obj) {
+	           return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", obj, w.obj)
+	       }
+	       return nil
+	   }
+	*/
+
+	// Uncomment this block if the option do not returns an error, otherwise delete it
+	/*
+	   defaultCheckFunc := func(w want, obj *T) error {
+	       if !reflect.DeepEqual(obj, w.obj) {
+	           return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", obj, w.obj)
+	       }
+	       return nil
+	   }
+	*/
+
+	tests := []test{
+		// TODO test cases
+		/*
+		   {
+		       name: "test_case_1",
+		       args: args {
+		           eg: nil,
+		       },
+		       want: want {
+		           obj: new(T),
+		       },
+		   },
+		*/
+
+		// TODO test cases
+		/*
+		   func() test {
+		       return test {
+		           name: "test_case_2",
+		           args: args {
+		           eg: nil,
+		           },
+		           want: want {
+		               obj: new(T),
+		           },
+		       }
+		   }(),
+		*/
+	}
+
+	for _, tc := range tests {
+		test := tc
+		t.Run(test.name, func(tt *testing.T) {
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, goleak.IgnoreCurrent())
+			if test.beforeFunc != nil {
+				test.beforeFunc(test.args)
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc(test.args)
+			}
+
+			// Uncomment this block if the option returns an error, otherwise delete it
+			/*
+			   if test.checkFunc == nil {
+			       test.checkFunc = defaultCheckFunc
+			   }
+
+			   got := WithErrGroup(test.args.eg)
+			   obj := new(T)
+			   if err := test.checkFunc(test.want, obj, got(obj)); err != nil {
+			       tt.Errorf("error = %v", err)
+			   }
+			*/
+
+			// Uncomment this block if the option do not return an error, otherwise delete it
+			/*
+			   if test.checkFunc == nil {
+			       test.checkFunc = defaultCheckFunc
+			   }
+			   got := WithErrGroup(test.args.eg)
+			   obj := new(T)
+			   got(obj)
+			   if err := test.checkFunc(test.want, obj); err != nil {
+			       tt.Errorf("error = %v", err)
+			   }
+			*/
+		})
+	}
+}
diff --git a/internal/tls/tls_test.go b/internal/tls/tls_test.go
index f6d2245938..2ddf1a4c79 100644
--- a/internal/tls/tls_test.go
+++ b/internal/tls/tls_test.go
@@ -433,3 +433,80 @@ func TestNewX509CertPool(t *testing.T) {
 		})
 	}
 }
+
+func Test_newCredential(t *testing.T) {
+	t.Parallel()
+	type args struct {
+		opts []Option
+	}
+	type want struct {
+		wantC *credentials
+		err   error
+	}
+	type test struct {
+		name       string
+		args       args
+		want       want
+		checkFunc  func(want, *credentials, error) error
+		beforeFunc func(args)
+		afterFunc  func(args)
+	}
+	defaultCheckFunc := func(w want, gotC *credentials, err error) error {
+		if !errors.Is(err, w.err) {
+			return errors.Errorf("got_error: \"%#v\",\n\t\t\t\twant: \"%#v\"", err, w.err)
+		}
+		if !reflect.DeepEqual(gotC, w.wantC) {
+			return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", gotC, w.wantC)
+		}
+		return nil
+	}
+	tests := []test{
+		// TODO test cases
+		/*
+		   {
+		       name: "test_case_1",
+		       args: args {
+		           opts: nil,
+		       },
+		       want: want{},
+		       checkFunc: defaultCheckFunc,
+		   },
+		*/
+
+		// TODO test cases
+		/*
+		   func() test {
+		       return test {
+		           name: "test_case_2",
+		           args: args {
+		           opts: nil,
+		           },
+		           want: want{},
+		           checkFunc: defaultCheckFunc,
+		       }
+		   }(),
+		*/
+	}
+
+	for _, tc := range tests {
+		test := tc
+		t.Run(test.name, func(tt *testing.T) {
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, goleak.IgnoreCurrent())
+			if test.beforeFunc != nil {
+				test.beforeFunc(test.args)
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc(test.args)
+			}
+			if test.checkFunc == nil {
+				test.checkFunc = defaultCheckFunc
+			}
+
+			gotC, err := newCredential(test.args.opts...)
+			if err := test.checkFunc(test.want, gotC, err); err != nil {
+				tt.Errorf("error = %v", err)
+			}
+		})
+	}
+}
diff --git a/k8s/gateway/backup/priorityclass.yaml b/k8s/gateway/backup/priorityclass.yaml
index 471eafce9a..f616da9a6c 100644
--- a/k8s/gateway/backup/priorityclass.yaml
+++ b/k8s/gateway/backup/priorityclass.yaml
@@ -17,7 +17,7 @@
 apiVersion: scheduling.k8s.io/v1
 kind: PriorityClass
 metadata:
-  name: vald-backup-gateway-priority
+  name: default-vald-backup-gateway-priority
   labels:
     app.kubernetes.io/name: vald
     helm.sh/chart: vald-v1.0.1
diff --git a/k8s/gateway/lb/priorityclass.yaml b/k8s/gateway/lb/priorityclass.yaml
index d66da896f8..9a4714e62b 100644
--- a/k8s/gateway/lb/priorityclass.yaml
+++ b/k8s/gateway/lb/priorityclass.yaml
@@ -17,7 +17,7 @@
 apiVersion: scheduling.k8s.io/v1
 kind: PriorityClass
 metadata:
-  name: vald-lb-gateway-priority
+  name: default-vald-lb-gateway-priority
   labels:
     app.kubernetes.io/name: vald
     helm.sh/chart: vald-v1.0.1
diff --git a/k8s/gateway/meta/priorityclass.yaml b/k8s/gateway/meta/priorityclass.yaml
index 42398d3e43..ffdb68430f 100644
--- a/k8s/gateway/meta/priorityclass.yaml
+++ b/k8s/gateway/meta/priorityclass.yaml
@@ -17,7 +17,7 @@
 apiVersion: scheduling.k8s.io/v1
 kind: PriorityClass
 metadata:
-  name: vald-meta-gateway-priority
+  name: default-vald-meta-gateway-priority
   labels:
     app.kubernetes.io/name: vald
     helm.sh/chart: vald-v1.0.1
diff --git a/pkg/discoverer/k8s/service/option_test.go b/pkg/discoverer/k8s/service/option_test.go
index 8bb0551ecd..5620a1462d 100644
--- a/pkg/discoverer/k8s/service/option_test.go
+++ b/pkg/discoverer/k8s/service/option_test.go
@@ -21,6 +21,7 @@ import (
 	"testing"
 
 	"github.com/vdaas/vald/internal/errgroup"
+	"github.com/vdaas/vald/internal/net/tcp"
 	"go.uber.org/goleak"
 )
 
@@ -491,3 +492,120 @@ func TestWithErrGroup(t *testing.T) {
 		})
 	}
 }
+
+func TestWithDialer(t *testing.T) {
+	t.Parallel()
+	// Change interface type to the type of object you are testing
+	type T = interface{}
+	type args struct {
+		der tcp.Dialer
+	}
+	type want struct {
+		obj *T
+		// Uncomment this line if the option returns an error, otherwise delete it
+		// err error
+	}
+	type test struct {
+		name string
+		args args
+		want want
+		// Use the first line if the option returns an error. otherwise use the second line
+		// checkFunc  func(want, *T, error) error
+		// checkFunc  func(want, *T) error
+		beforeFunc func(args)
+		afterFunc  func(args)
+	}
+
+	// Uncomment this block if the option returns an error, otherwise delete it
+	/*
+	   defaultCheckFunc := func(w want, obj *T, err error) error {
+	       if !errors.Is(err, w.err) {
+	           return errors.Errorf("got_error: \"%#v\",\n\t\t\t\twant: \"%#v\"", err, w.err)
+	       }
+	       if !reflect.DeepEqual(obj, w.obj) {
+	           return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", obj, w.obj)
+	       }
+	       return nil
+	   }
+	*/
+
+	// Uncomment this block if the option do not returns an error, otherwise delete it
+	/*
+	   defaultCheckFunc := func(w want, obj *T) error {
+	       if !reflect.DeepEqual(obj, w.obj) {
+	           return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", obj, w.obj)
+	       }
+	       return nil
+	   }
+	*/
+
+	tests := []test{
+		// TODO test cases
+		/*
+		   {
+		       name: "test_case_1",
+		       args: args {
+		           der: nil,
+		       },
+		       want: want {
+		           obj: new(T),
+		       },
+		   },
+		*/
+
+		// TODO test cases
+		/*
+		   func() test {
+		       return test {
+		           name: "test_case_2",
+		           args: args {
+		           der: nil,
+		           },
+		           want: want {
+		               obj: new(T),
+		           },
+		       }
+		   }(),
+		*/
+	}
+
+	for _, tc := range tests {
+		test := tc
+		t.Run(test.name, func(tt *testing.T) {
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, goleak.IgnoreCurrent())
+			if test.beforeFunc != nil {
+				test.beforeFunc(test.args)
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc(test.args)
+			}
+
+			// Uncomment this block if the option returns an error, otherwise delete it
+			/*
+			   if test.checkFunc == nil {
+			       test.checkFunc = defaultCheckFunc
+			   }
+
+			   got := WithDialer(test.args.der)
+			   obj := new(T)
+			   if err := test.checkFunc(test.want, obj, got(obj)); err != nil {
+			       tt.Errorf("error = %v", err)
+			   }
+			*/
+
+			// Uncomment this block if the option do not return an error, otherwise delete it
+			/*
+			   if test.checkFunc == nil {
+			       test.checkFunc = defaultCheckFunc
+			   }
+			   got := WithDialer(test.args.der)
+			   obj := new(T)
+			   got(obj)
+			   if err := test.checkFunc(test.want, obj); err != nil {
+			       tt.Errorf("error = %v", err)
+			   }
+			*/
+		})
+	}
+}
diff --git a/pkg/gateway/lb/service/gateway_test.go b/pkg/gateway/lb/service/gateway_test.go
index bf0e15b308..ed8f848f90 100644
--- a/pkg/gateway/lb/service/gateway_test.go
+++ b/pkg/gateway/lb/service/gateway_test.go
@@ -479,3 +479,93 @@ func Test_gateway_GetAgentCount(t *testing.T) {
 		})
 	}
 }
+
+func Test_gateway_Addrs(t *testing.T) {
+	t.Parallel()
+	type args struct {
+		ctx context.Context
+	}
+	type fields struct {
+		client discoverer.Client
+		eg     errgroup.Group
+	}
+	type want struct {
+		want []string
+	}
+	type test struct {
+		name       string
+		args       args
+		fields     fields
+		want       want
+		checkFunc  func(want, []string) error
+		beforeFunc func(args)
+		afterFunc  func(args)
+	}
+	defaultCheckFunc := func(w want, got []string) error {
+		if !reflect.DeepEqual(got, w.want) {
+			return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", got, w.want)
+		}
+		return nil
+	}
+	tests := []test{
+		// TODO test cases
+		/*
+		   {
+		       name: "test_case_1",
+		       args: args {
+		           ctx: nil,
+		       },
+		       fields: fields {
+		           client: nil,
+		           eg: nil,
+		       },
+		       want: want{},
+		       checkFunc: defaultCheckFunc,
+		   },
+		*/
+
+		// TODO test cases
+		/*
+		   func() test {
+		       return test {
+		           name: "test_case_2",
+		           args: args {
+		           ctx: nil,
+		           },
+		           fields: fields {
+		           client: nil,
+		           eg: nil,
+		           },
+		           want: want{},
+		           checkFunc: defaultCheckFunc,
+		       }
+		   }(),
+		*/
+	}
+
+	for _, tc := range tests {
+		test := tc
+		t.Run(test.name, func(tt *testing.T) {
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, goleak.IgnoreCurrent())
+			if test.beforeFunc != nil {
+				test.beforeFunc(test.args)
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc(test.args)
+			}
+			if test.checkFunc == nil {
+				test.checkFunc = defaultCheckFunc
+			}
+			g := &gateway{
+				client: test.fields.client,
+				eg:     test.fields.eg,
+			}
+
+			got := g.Addrs(test.args.ctx)
+			if err := test.checkFunc(test.want, got); err != nil {
+				tt.Errorf("error = %v", err)
+			}
+		})
+	}
+}
diff --git a/pkg/gateway/meta/service/meta_test.go b/pkg/gateway/meta/service/meta_test.go
index f156cf14d4..0916c12e1e 100644
--- a/pkg/gateway/meta/service/meta_test.go
+++ b/pkg/gateway/meta/service/meta_test.go
@@ -1404,3 +1404,95 @@ func Test_meta_DeleteUUIDs(t *testing.T) {
 		})
 	}
 }
+
+func Test_meta_GRPCClient(t *testing.T) {
+	t.Parallel()
+	type fields struct {
+		client              grpc.Client
+		cache               cache.Cache
+		enableCache         bool
+		expireCheckDuration string
+		expireDuration      string
+	}
+	type want struct {
+		want grpc.Client
+	}
+	type test struct {
+		name       string
+		fields     fields
+		want       want
+		checkFunc  func(want, grpc.Client) error
+		beforeFunc func()
+		afterFunc  func()
+	}
+	defaultCheckFunc := func(w want, got grpc.Client) error {
+		if !reflect.DeepEqual(got, w.want) {
+			return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", got, w.want)
+		}
+		return nil
+	}
+	tests := []test{
+		// TODO test cases
+		/*
+		   {
+		       name: "test_case_1",
+		       fields: fields {
+		           client: nil,
+		           cache: nil,
+		           enableCache: false,
+		           expireCheckDuration: "",
+		           expireDuration: "",
+		       },
+		       want: want{},
+		       checkFunc: defaultCheckFunc,
+		   },
+		*/
+
+		// TODO test cases
+		/*
+		   func() test {
+		       return test {
+		           name: "test_case_2",
+		           fields: fields {
+		           client: nil,
+		           cache: nil,
+		           enableCache: false,
+		           expireCheckDuration: "",
+		           expireDuration: "",
+		           },
+		           want: want{},
+		           checkFunc: defaultCheckFunc,
+		       }
+		   }(),
+		*/
+	}
+
+	for _, tc := range tests {
+		test := tc
+		t.Run(test.name, func(tt *testing.T) {
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, goleak.IgnoreCurrent())
+			if test.beforeFunc != nil {
+				test.beforeFunc()
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc()
+			}
+			if test.checkFunc == nil {
+				test.checkFunc = defaultCheckFunc
+			}
+			m := &meta{
+				client:              test.fields.client,
+				cache:               test.fields.cache,
+				enableCache:         test.fields.enableCache,
+				expireCheckDuration: test.fields.expireCheckDuration,
+				expireDuration:      test.fields.expireDuration,
+			}
+
+			got := m.GRPCClient()
+			if err := test.checkFunc(test.want, got); err != nil {
+				tt.Errorf("error = %v", err)
+			}
+		})
+	}
+}

From 22987df073f0e7a24ba0f151531668ebd0d4ee86 Mon Sep 17 00:00:00 2001
From: kpango <kpango@vdaas.org>
Date: Tue, 9 Feb 2021 11:49:35 +0900
Subject: [PATCH 14/22] update golang version to 1.15.8 inclueds cgo&net/http
 bugfixes

Signed-off-by: kpango <kpango@vdaas.org>
---
 versions/GO_VERSION | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/versions/GO_VERSION b/versions/GO_VERSION
index 545fd574d3..98e863cdf8 100644
--- a/versions/GO_VERSION
+++ b/versions/GO_VERSION
@@ -1 +1 @@
-1.15.7
+1.15.8

From 2ea7cffc09a6934a1794eb2286939c7b7890efa4 Mon Sep 17 00:00:00 2001
From: kpango <kpango@vdaas.org>
Date: Tue, 9 Feb 2021 12:23:24 +0900
Subject: [PATCH 15/22] fix incorrect helm resource path

Signed-off-by: kpango <kpango@vdaas.org>
---
 charts/vald/values.yaml | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/charts/vald/values.yaml b/charts/vald/values.yaml
index a49b4b4d31..02f25be4cc 100644
--- a/charts/vald/values.yaml
+++ b/charts/vald/values.yaml
@@ -2615,15 +2615,15 @@ agent:
             # agent.sidecar.config.client.tcp.dialer.dual_stack_enabled -- HTTP client TCP dialer dual stack enabled
             dual_stack_enabled: false
           tls:
-            # agent.sidecar.config.client.tls.enabled -- TLS enabled
+            # agent.sidecar.config.client.tcp.tls.enabled -- TLS enabled
             enabled: false
-            # agent.sidecar.config.client.tls.cert -- TLS cert path
+            # agent.sidecar.config.client.tcp.tls.cert -- TLS cert path
             cert: /path/to/cert
-            # agent.sidecar.config.client.tls.key -- TLS key path
+            # agent.sidecar.config.client.tcp.tls.key -- TLS key path
             key: /path/to/key
-            # agent.sidecar.config.client.tls.ca -- TLS ca path
+            # agent.sidecar.config.client.tcp.tls.ca -- TLS ca path
             ca: /path/to/ca
-            # agent.sidecar.config.client.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
+            # agent.sidecar.config.client.tcp.tls.insecure_skip_verify -- enable/disable skip SSL certificate verification
             insecure_skip_verify: false
         # @schema {"name": "agent.sidecar.config.client.transport", "type": "object"}
         transport:

From c2c6b4b49e788067f6e5667e893a9b42c67df4d4 Mon Sep 17 00:00:00 2001
From: kpango <kpango@vdaas.org>
Date: Tue, 9 Feb 2021 12:54:26 +0900
Subject: [PATCH 16/22] bugfix: add priorityClass namespace to each gateways

Signed-off-by: kpango <kpango@vdaas.org>
---
 charts/vald/templates/gateway/backup/daemonset.yaml  | 2 +-
 charts/vald/templates/gateway/backup/deployment.yaml | 2 +-
 charts/vald/templates/gateway/filter/daemonset.yaml  | 2 +-
 charts/vald/templates/gateway/filter/deployment.yaml | 2 +-
 charts/vald/templates/gateway/lb/daemonset.yaml      | 2 +-
 charts/vald/templates/gateway/lb/deployment.yaml     | 2 +-
 charts/vald/templates/gateway/meta/daemonset.yaml    | 2 +-
 charts/vald/templates/gateway/meta/deployment.yaml   | 2 +-
 8 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/charts/vald/templates/gateway/backup/daemonset.yaml b/charts/vald/templates/gateway/backup/daemonset.yaml
index 80743be011..074a381e62 100644
--- a/charts/vald/templates/gateway/backup/daemonset.yaml
+++ b/charts/vald/templates/gateway/backup/daemonset.yaml
@@ -118,7 +118,7 @@ spec:
       {{- end }}
       {{- if $gateway.podPriority }}
       {{- if $gateway.podPriority.enabled }}
-      priorityClassName: {{ $gateway.name }}-priority
+      priorityClassName: {{ .Release.Namespace }}-{{ $gateway.name }}-priority
       {{- end }}
       {{- end }}
 status:
diff --git a/charts/vald/templates/gateway/backup/deployment.yaml b/charts/vald/templates/gateway/backup/deployment.yaml
index bf97566722..eb3ef13165 100644
--- a/charts/vald/templates/gateway/backup/deployment.yaml
+++ b/charts/vald/templates/gateway/backup/deployment.yaml
@@ -123,7 +123,7 @@ spec:
       {{- end }}
       {{- if $gateway.podPriority }}
       {{- if $gateway.podPriority.enabled }}
-      priorityClassName: {{ $gateway.name }}-priority
+      priorityClassName: {{ .Release.Namespace }}-{{ $gateway.name }}-priority
       {{- end }}
       {{- end }}
 status:
diff --git a/charts/vald/templates/gateway/filter/daemonset.yaml b/charts/vald/templates/gateway/filter/daemonset.yaml
index a1308cf67e..4cf6607d40 100644
--- a/charts/vald/templates/gateway/filter/daemonset.yaml
+++ b/charts/vald/templates/gateway/filter/daemonset.yaml
@@ -118,7 +118,7 @@ spec:
       {{- end }}
       {{- if $gateway.podPriority }}
       {{- if $gateway.podPriority.enabled }}
-      priorityClassName: {{ $gateway.name }}-priority
+      priorityClassName: {{ .Release.Namespace }}-{{ $gateway.name }}-priority
       {{- end }}
       {{- end }}
 status:
diff --git a/charts/vald/templates/gateway/filter/deployment.yaml b/charts/vald/templates/gateway/filter/deployment.yaml
index bd65d93290..ea024f03c0 100644
--- a/charts/vald/templates/gateway/filter/deployment.yaml
+++ b/charts/vald/templates/gateway/filter/deployment.yaml
@@ -123,7 +123,7 @@ spec:
       {{- end }}
       {{- if $gateway.podPriority }}
       {{- if $gateway.podPriority.enabled }}
-      priorityClassName: {{ $gateway.name }}-priority
+      priorityClassName: {{ .Release.Namespace }}-{{ $gateway.name }}-priority
       {{- end }}
       {{- end }}
 status:
diff --git a/charts/vald/templates/gateway/lb/daemonset.yaml b/charts/vald/templates/gateway/lb/daemonset.yaml
index c90b60c214..b206d824c1 100644
--- a/charts/vald/templates/gateway/lb/daemonset.yaml
+++ b/charts/vald/templates/gateway/lb/daemonset.yaml
@@ -118,7 +118,7 @@ spec:
       {{- end }}
       {{- if $gateway.podPriority }}
       {{- if $gateway.podPriority.enabled }}
-      priorityClassName: {{ $gateway.name }}-priority
+      priorityClassName: {{ .Release.Namespace }}-{{ $gateway.name }}-priority
       {{- end }}
       {{- end }}
 status:
diff --git a/charts/vald/templates/gateway/lb/deployment.yaml b/charts/vald/templates/gateway/lb/deployment.yaml
index 914f3d92f1..cb7f6b2dd4 100644
--- a/charts/vald/templates/gateway/lb/deployment.yaml
+++ b/charts/vald/templates/gateway/lb/deployment.yaml
@@ -123,7 +123,7 @@ spec:
       {{- end }}
       {{- if $gateway.podPriority }}
       {{- if $gateway.podPriority.enabled }}
-      priorityClassName: {{ $gateway.name }}-priority
+      priorityClassName: {{ .Release.Namespace }}-{{ $gateway.name }}-priority
       {{- end }}
       {{- end }}
 status:
diff --git a/charts/vald/templates/gateway/meta/daemonset.yaml b/charts/vald/templates/gateway/meta/daemonset.yaml
index 6ac1877f94..429099a193 100644
--- a/charts/vald/templates/gateway/meta/daemonset.yaml
+++ b/charts/vald/templates/gateway/meta/daemonset.yaml
@@ -118,7 +118,7 @@ spec:
       {{- end }}
       {{- if $gateway.podPriority }}
       {{- if $gateway.podPriority.enabled }}
-      priorityClassName: {{ $gateway.name }}-priority
+      priorityClassName: {{ .Release.Namespace }}-{{ $gateway.name }}-priority
       {{- end }}
       {{- end }}
 status:
diff --git a/charts/vald/templates/gateway/meta/deployment.yaml b/charts/vald/templates/gateway/meta/deployment.yaml
index a9a761443c..124d440f11 100644
--- a/charts/vald/templates/gateway/meta/deployment.yaml
+++ b/charts/vald/templates/gateway/meta/deployment.yaml
@@ -123,7 +123,7 @@ spec:
       {{- end }}
       {{- if $gateway.podPriority }}
       {{- if $gateway.podPriority.enabled }}
-      priorityClassName: {{ $gateway.name }}-priority
+      priorityClassName: {{ .Release.Namespace }}-{{ $gateway.name }}-priority
       {{- end }}
       {{- end }}
 status:

From fc4805bb519c8b36a635f84018eaf5bb615c0a96 Mon Sep 17 00:00:00 2001
From: kpango <kpango@vdaas.org>
Date: Tue, 9 Feb 2021 16:31:09 +0900
Subject: [PATCH 17/22] extend wait duration for e2e deploy test

Signed-off-by: kpango <kpango@vdaas.org>
---
 .github/workflows/e2e-deploy.yml |  8 ++++----
 Makefile                         | 10 +++++-----
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/.github/workflows/e2e-deploy.yml b/.github/workflows/e2e-deploy.yml
index 6cfb570993..a213d1188d 100644
--- a/.github/workflows/e2e-deploy.yml
+++ b/.github/workflows/e2e-deploy.yml
@@ -133,7 +133,7 @@ jobs:
           go test \
             -v tests/e2e/crud_test.go \
             -tags "e2e" \
-            -timeout 15m \
+            -timeout 30m \
             -host=localhost \
             -port=8081 \
             -dataset=`pwd`/hack/benchmark/assets/dataset/${DATASET} \
@@ -143,7 +143,7 @@ jobs:
             -get-object-num=5 \
             -update-num=2 \
             -remove-num=2 \
-            -wait-after-insert=3m \
+            -wait-after-insert=10m \
             -portforward \
             -portforward-ns=default \
             -portforward-pod-name=${podname} \
@@ -255,7 +255,7 @@ jobs:
           go test \
             -v tests/e2e/crud_test.go \
             -tags "e2e" \
-            -timeout 15m \
+            -timeout 30m \
             -host=localhost \
             -port=8081 \
             -dataset=`pwd`/hack/benchmark/assets/dataset/${DATASET} \
@@ -265,7 +265,7 @@ jobs:
             -get-object-num=10 \
             -update-num=3 \
             -remove-num=2 \
-            -wait-after-insert=3m \
+            -wait-after-insert=10m \
             -portforward \
             -portforward-ns=default \
             -portforward-pod-name=${podname} \
diff --git a/Makefile b/Makefile
index 68dcd33e62..050e9713dc 100644
--- a/Makefile
+++ b/Makefile
@@ -234,15 +234,15 @@ SHELL = bash
 
 E2E_BIND_HOST                      ?= 127.0.0.1
 E2E_BIND_PORT                      ?= 8082
-E2E_TIMEOUT                        ?= 15m
+E2E_TIMEOUT                        ?= 30m
 E2E_DATASET_NAME                   ?= fashion-mnist-784-euclidean
-E2E_INSERT_COUNT                   ?= 1000
+E2E_INSERT_COUNT                   ?= 10000
 E2E_SEARCH_COUNT                   ?= 1000
-E2E_SEARCH_BY_ID_COUNT             ?= 10
+E2E_SEARCH_BY_ID_COUNT             ?= 100
 E2E_GET_OBJECT_COUNT               ?= 10
-E2E_UPDATE_COUNT                   ?= 3
+E2E_UPDATE_COUNT                   ?= 10
 E2E_REMOVE_COUNT                   ?= 3
-E2E_WAIT_FOR_CREATE_INDEX_DURATION ?= 3m
+E2E_WAIT_FOR_CREATE_INDEX_DURATION ?= 8m
 E2E_TARGET_NAME                    ?= vald-meta-gateway
 E2E_TARGET_POD_NAME                ?= $(eval E2E_TARGET_POD_NAME := $(shell kubectl get pods --selector=app=$(E2E_TARGET_NAME) | tail -1 | cut -f1 -d " "))$(E2E_TARGET_POD_NAME)
 E2E_TARGET_NAMESPACE               ?= default

From 2d43482cb01587d4f843af385d3f6545a562032f Mon Sep 17 00:00:00 2001
From: kpango <kpango@vdaas.org>
Date: Tue, 9 Feb 2021 17:08:36 +0900
Subject: [PATCH 18/22] fix pointed out from vankichi

Signed-off-by: kpango <kpango@vdaas.org>
---
 internal/errors/errors_test.go | 111 +++++++++++++++++----------------
 internal/errors/net.go         |   1 +
 internal/tls/option_test.go    |   4 +-
 3 files changed, 59 insertions(+), 57 deletions(-)

diff --git a/internal/errors/errors_test.go b/internal/errors/errors_test.go
index 22d13dbf16..c424dc4df1 100644
--- a/internal/errors/errors_test.go
+++ b/internal/errors/errors_test.go
@@ -16,6 +16,7 @@
 package errors
 
 import (
+	"errors"
 	"fmt"
 	"math"
 	"reflect"
@@ -45,7 +46,7 @@ func TestErrTimeoutParseFailed(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			wantErr := New("invalid timeout value: 10hours\t:timeout parse error out put failed")
+			wantErr := errors.New("invalid timeout value: 10hours\t:timeout parse error out put failed")
 			return test{
 				name: "return an ErrTimeoutParseFailed error when timeout is not empty.",
 				args: args{
@@ -57,7 +58,7 @@ func TestErrTimeoutParseFailed(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := New("invalid timeout value: \t:timeout parse error out put failed")
+			wantErr := errors.New("invalid timeout value: \t:timeout parse error out put failed")
 			return test{
 				name: "return an ErrTimeoutParseFailed error when timeout is empty.",
 				args: args{
@@ -113,7 +114,7 @@ func TestErrServerNotFound(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			wantErr := New("server gateway.vald.svc.cluster.local not found")
+			wantErr := errors.New("server gateway.vald.svc.cluster.local not found")
 			return test{
 				name: "return an ErrServerNotFound error when the name is not empty.",
 				args: args{
@@ -125,7 +126,7 @@ func TestErrServerNotFound(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := New("server  not found")
+			wantErr := errors.New("server  not found")
 			return test{
 				name: "return an ErrServerNotFound error when the name is empty.",
 				args: args{
@@ -182,11 +183,11 @@ func TestErrOptionFailed(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			wantErr := New("failed to setup option :\tfmt.Println: option failed error")
+			wantErr := errors.New("failed to setup option :\tfmt.Println: option failed error")
 			return test{
 				name: "return an ErrOptionFailed error when err and ref are not empty.",
 				args: args{
-					err: New("option failed error"),
+					err: errors.New("option failed error"),
 					ref: func() reflect.Value {
 						var i interface{} = fmt.Println
 						return reflect.ValueOf(i)
@@ -198,7 +199,7 @@ func TestErrOptionFailed(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := New("failed to setup option :\t")
+			wantErr := errors.New("failed to setup option :\t")
 			return test{
 				name: "return an ErrOptionFailed error when err is empty and ref is zero value.",
 				args: args{
@@ -213,11 +214,11 @@ func TestErrOptionFailed(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := New("failed to setup option :\t: option failed error")
+			wantErr := errors.New("failed to setup option :\t: option failed error")
 			return test{
 				name: "return an ErrOptionFailed error when err is not empty and ref is nil.",
 				args: args{
-					err: New("option failed error"),
+					err: errors.New("option failed error"),
 				},
 				want: want{
 					wantErr,
@@ -225,7 +226,7 @@ func TestErrOptionFailed(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := New("failed to setup option :\t")
+			wantErr := errors.New("failed to setup option :\t")
 			return test{
 				name: "return an ErrOptionFailed error when err is empty and ref is <invalid reflect.Value>.",
 				args: args{
@@ -281,11 +282,11 @@ func TestErrArgumentPraseFailed(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			wantErr := New("argument parse failed: argument parse error")
+			wantErr := errors.New("argument parse failed: argument parse error")
 			return test{
 				name: "return an ErrArgumentParseFailed error when err is not empty.",
 				args: args{
-					err: New("argument parse error"),
+					err: errors.New("argument parse error"),
 				},
 				want: want{
 					wantErr,
@@ -293,7 +294,7 @@ func TestErrArgumentPraseFailed(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := New("argument parse failed")
+			wantErr := errors.New("argument parse failed")
 			return test{
 				name: "return an ErrArgumentParseFailed error when err is empty.",
 				args: args{},
@@ -347,11 +348,11 @@ func TestErrBackoffTimeout(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			wantErr := New("backoff timeout by limitation: backoff is timeout")
+			wantErr := errors.New("backoff timeout by limitation: backoff is timeout")
 			return test{
 				name: "return an ErrBackoffTimeout error when err is not empty.",
 				args: args{
-					err: New("backoff is timeout"),
+					err: errors.New("backoff is timeout"),
 				},
 				want: want{
 					wantErr,
@@ -359,7 +360,7 @@ func TestErrBackoffTimeout(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := New("backoff timeout by limitation")
+			wantErr := errors.New("backoff timeout by limitation")
 			return test{
 				name: "return an ErrBackoffTimeout error when err is empty.",
 				args: args{},
@@ -514,11 +515,11 @@ func TestErrLoggingRetry(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			wantErr := New("failed to output fmt.Println logs, retrying...: logging retry")
+			wantErr := errors.New("failed to output fmt.Println logs, retrying...: logging retry")
 			return test{
 				name: "return an ErrLoggingRetry error when err and ref are not empty.",
 				args: args{
-					err: New("logging retry"),
+					err: errors.New("logging retry"),
 					ref: func() reflect.Value {
 						var i interface{} = fmt.Println
 						return reflect.ValueOf(i)
@@ -530,11 +531,11 @@ func TestErrLoggingRetry(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := New("failed to output  logs, retrying...: logging retry")
+			wantErr := errors.New("failed to output  logs, retrying...: logging retry")
 			return test{
 				name: "return an ErrLoggingRetry error when err is not empty and ref is nil.",
 				args: args{
-					err: New("logging retry"),
+					err: errors.New("logging retry"),
 				},
 				want: want{
 					wantErr,
@@ -542,7 +543,7 @@ func TestErrLoggingRetry(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := New("failed to output  logs, retrying...")
+			wantErr := errors.New("failed to output  logs, retrying...")
 			return test{
 				name: "return an ErrLoggingRetry error when err is empty and ref is zero value.",
 				args: args{
@@ -557,7 +558,7 @@ func TestErrLoggingRetry(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := New("failed to output  logs, retrying...")
+			wantErr := errors.New("failed to output  logs, retrying...")
 			return test{
 				name: "return an ErrLoggingRetry error when err is empty and ref is <invalid reflect.Value>.",
 				args: args{
@@ -614,11 +615,11 @@ func TestErrLoggingFailed(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			wantErr := New("failed to output fmt.Println logs: logging retry")
+			wantErr := errors.New("failed to output fmt.Println logs: logging retry")
 			return test{
 				name: "return an ErrLoggingFailed error when err and ref are not empty.",
 				args: args{
-					err: New("logging retry"),
+					err: errors.New("logging retry"),
 					ref: func() reflect.Value {
 						var i interface{} = fmt.Println
 						return reflect.ValueOf(i)
@@ -630,11 +631,11 @@ func TestErrLoggingFailed(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := New("failed to output  logs: logging retry")
+			wantErr := errors.New("failed to output  logs: logging retry")
 			return test{
 				name: "return an ErrLoggingFailed error when err is not empty and ref is nil.",
 				args: args{
-					err: New("logging retry"),
+					err: errors.New("logging retry"),
 				},
 				want: want{
 					wantErr,
@@ -642,7 +643,7 @@ func TestErrLoggingFailed(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := New("failed to output  logs")
+			wantErr := errors.New("failed to output  logs")
 			return test{
 				name: "return an ErrLoggingFailed error when err is empty and ref is zero value.",
 				args: args{
@@ -657,7 +658,7 @@ func TestErrLoggingFailed(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := New("failed to output  logs")
+			wantErr := errors.New("failed to output  logs")
 			return test{
 				name: "return an ErrLoggingFailed error when err is empty and ref is <invalid reflect,Value>.",
 				args: args{
@@ -713,7 +714,7 @@ func TestNew(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			wantErr := New("error is occurred")
+			wantErr := errors.New("error is occurred")
 			return test{
 				name: "return a New error when msg is not empty.",
 				args: args{
@@ -781,7 +782,7 @@ func TestWrap(t *testing.T) {
 			return test{
 				name: "return an error when err and msg are not empty.",
 				args: args{
-					err: New("err"),
+					err: errors.New("err"),
 					msg: "error is occurred",
 				},
 				want: want{
@@ -790,11 +791,11 @@ func TestWrap(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := New("err")
+			wantErr := errors.New("err")
 			return test{
 				name: "return an error when err is not empty and msg is empty.",
 				args: args{
-					err: New("err"),
+					err: errors.New("err"),
 				},
 				want: want{
 					wantErr,
@@ -802,7 +803,7 @@ func TestWrap(t *testing.T) {
 			}
 		}(),
 		func() test {
-			wantErr := New("error is occurred")
+			wantErr := errors.New("error is occurred")
 			return test{
 				name: "return an error when err is empty and msg is not empty.",
 				args: args{
@@ -867,7 +868,7 @@ func TestWrapf(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			err := New("err: ")
+			err := errors.New("err: ")
 			format := "error is occurred: %v"
 			val := []interface{}{
 				"timeout error",
@@ -886,7 +887,7 @@ func TestWrapf(t *testing.T) {
 			}
 		}(),
 		func() test {
-			err := New("err: ")
+			err := errors.New("err: ")
 			format := "error is occurred: %v : %v"
 			val := []interface{}{
 				"invalid time_duration",
@@ -906,7 +907,7 @@ func TestWrapf(t *testing.T) {
 			}
 		}(),
 		func() test {
-			err := New("err: ")
+			err := errors.New("err: ")
 			val := []interface{}{
 				"invalid time_duration",
 				10,
@@ -924,7 +925,7 @@ func TestWrapf(t *testing.T) {
 			}
 		}(),
 		func() test {
-			err := New("err: ")
+			err := errors.New("err: ")
 			format := "error is occurred: %v : %v"
 			wantErr := err
 			return test{
@@ -939,7 +940,7 @@ func TestWrapf(t *testing.T) {
 			}
 		}(),
 		func() test {
-			err := New("err: ")
+			err := errors.New("err: ")
 			wantErr := err
 			return test{
 				name: "return an error when err is not empty and format and args are empty.",
@@ -971,7 +972,7 @@ func TestWrapf(t *testing.T) {
 		}(),
 		func() test {
 			format := "error is occurred: %v : %v"
-			wantErr := New(format)
+			wantErr := errors.New(format)
 			return test{
 				name: "return an error when err and args are empty and format is not empty.",
 				args: args{
@@ -1065,11 +1066,11 @@ func TestCause(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			wantErr := Unwrap(Wrap(New("err"), "invalid parameter"))
+			wantErr := errors.Unwrap(Wrap(errors.New("err"), "invalid parameter"))
 			return test{
 				name: "return an unwrapped error when err is not empty.",
 				args: args{
-					err: Wrap(New("err"), "invalid parameter"),
+					err: Wrap(errors.New("err"), "invalid parameter"),
 				},
 				want: want{
 					wantErr,
@@ -1128,7 +1129,7 @@ func TestUnwarp(t *testing.T) {
 	}
 	tests := []test{
 		func() test {
-			wantErr := New("err")
+			wantErr := errors.New("err")
 			err := fmt.Errorf("%s: %w", "error occurs", wantErr)
 			return test{
 				name: "return an unwrapped error when err is not empty.",
@@ -1354,15 +1355,15 @@ func TestIs(t *testing.T) {
 		{
 			name: "return false when target is nil.",
 			args: args{
-				err: New("invalid parameter"),
+				err: errors.New("invalid parameter"),
 			},
 			want: want{},
 		},
 		{
 			name: "return true when err is same comparable errors type and same error as target.",
 			args: args{
-				err:    New("invalid parameter"),
-				target: New("invalid parameter"),
+				err:    errors.New("invalid parameter"),
+				target: errors.New("invalid parameter"),
 			},
 			want: want{
 				true,
@@ -1371,15 +1372,15 @@ func TestIs(t *testing.T) {
 		{
 			name: "return false when err is same comparable errors type and differ error as target.",
 			args: args{
-				err:    New(""),
-				target: New("err is occurred"),
+				err:    errors.New(""),
+				target: errors.New("err is occurred"),
 			},
 			want: want{},
 		},
 		{
 			name: "return true when err is comparable error and target is uncomparable error and both err msg is same.",
 			args: args{
-				err: New("err is occurred"),
+				err: errors.New("err is occurred"),
 				target: uncomparableErr{
 					[]interErr{
 						{
@@ -1395,7 +1396,7 @@ func TestIs(t *testing.T) {
 		{
 			name: "return false when err is comparable error and target is uncomparable error and both err msg is not same.",
 			args: args{
-				err: New("err is occurred"),
+				err: errors.New("err is occurred"),
 				target: uncomparableErr{
 					[]interErr{
 						{
@@ -1410,7 +1411,7 @@ func TestIs(t *testing.T) {
 			name: "return true when err is wrapped comparable error and target is uncomparable error and err.err.Error() and target msg are same.",
 			args: args{
 				err: wrapErr{
-					err: New("invalid parameter"),
+					err: errors.New("invalid parameter"),
 				},
 				target: uncomparableErr{
 					[]interErr{
@@ -1428,7 +1429,7 @@ func TestIs(t *testing.T) {
 			name: "return false when err is wrapped comparable error and target is uncomparable error and err.err.Error() and target msg are not same.",
 			args: args{
 				err: wrapErr{
-					err: New("err is occurred"),
+					err: errors.New("err is occurred"),
 				},
 				target: uncomparableErr{
 					[]interErr{
@@ -1444,7 +1445,7 @@ func TestIs(t *testing.T) {
 			name: "return false when err is comparable error with Is() implemented and target is uncomparable error and target msg is empty.",
 			args: args{
 				err: isErr{
-					err: New("err is occurred"),
+					err: errors.New("err is occurred"),
 				},
 				target: uncomparableErr{},
 			},
@@ -1454,7 +1455,7 @@ func TestIs(t *testing.T) {
 			name: "return true when err is comparable error with Is() implemented and target is uncomparable error and target msg is not empty.",
 			args: args{
 				err: isErr{
-					err: New("err is occurred"),
+					err: errors.New("err is occurred"),
 				},
 				target: uncomparableErr{
 					[]interErr{
@@ -1516,8 +1517,8 @@ func TestAs(t *testing.T) {
 		{
 			name: "return true when err and target is not empty.",
 			args: args{
-				err:    New("err"),
-				target: New("err is occurred"),
+				err:    errors.New("err"),
+				target: errors.New("err is occurred"),
 			},
 			want: want{
 				true,
diff --git a/internal/errors/net.go b/internal/errors/net.go
index 7fcd4bf18a..1e17afc502 100644
--- a/internal/errors/net.go
+++ b/internal/errors/net.go
@@ -37,6 +37,7 @@ var (
 		return Errorf("no port available for Host: %s\tbetween %d ~ %d", host, start, end)
 	}
 
+	// ErrLookupIPAddrNotFound represents a function to generate an error that the host's ip address could not discovererd from DNS.
 	ErrLookupIPAddrNotFound = func(host string) error {
 		return Errorf("failed to lookup ip addrs for host: %s", host)
 	}
diff --git a/internal/tls/option_test.go b/internal/tls/option_test.go
index e0d18098e4..4a2bc6a0eb 100644
--- a/internal/tls/option_test.go
+++ b/internal/tls/option_test.go
@@ -355,7 +355,7 @@ func TestWithInsecureSkipVerify(t *testing.T) {
 	}
 	tests := []test{
 		{
-			name: "InsecureSkipVerify is true",
+			name: "success InsecureSkipVerify when insecure is true",
 			args: args{
 				insecure: true,
 			},
@@ -366,7 +366,7 @@ func TestWithInsecureSkipVerify(t *testing.T) {
 			},
 		},
 		{
-			name: "InsecureSkipVerify is false",
+			name: "success InsecureSkipVerify when insecure is false",
 			args: args{
 				insecure: false,
 			},

From f37f01221a0429e0eb072aa86ea6ef0ba95b3119 Mon Sep 17 00:00:00 2001
From: kpango <kpango@vdaas.org>
Date: Tue, 9 Feb 2021 17:22:58 +0900
Subject: [PATCH 19/22] fix failed test

Signed-off-by: kpango <kpango@vdaas.org>
---
 internal/net/tcp/dialer.go      | 2 +-
 internal/net/tcp/dialer_test.go | 1 -
 internal/tls/tls.go             | 6 ++++++
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/internal/net/tcp/dialer.go b/internal/net/tcp/dialer.go
index 4c06d70277..8175ceffaa 100644
--- a/internal/net/tcp/dialer.go
+++ b/internal/net/tcp/dialer.go
@@ -19,7 +19,6 @@ package tcp
 
 import (
 	"context"
-	"crypto/tls"
 	"strconv"
 	"sync"
 	"sync/atomic"
@@ -31,6 +30,7 @@ import (
 	"github.com/vdaas/vald/internal/log"
 	"github.com/vdaas/vald/internal/net"
 	"github.com/vdaas/vald/internal/safety"
+	"github.com/vdaas/vald/internal/tls"
 )
 
 // Dialer is an interface to get the dialer instance to connect to an address.
diff --git a/internal/net/tcp/dialer_test.go b/internal/net/tcp/dialer_test.go
index 6a7911af65..bbdba405a3 100644
--- a/internal/net/tcp/dialer_test.go
+++ b/internal/net/tcp/dialer_test.go
@@ -19,7 +19,6 @@ package tcp
 
 import (
 	"context"
-	"crypto/tls"
 	stderrors "errors"
 	"fmt"
 	"io/ioutil"
diff --git a/internal/tls/tls.go b/internal/tls/tls.go
index 38ed1e47f9..69a2d0dcfa 100644
--- a/internal/tls/tls.go
+++ b/internal/tls/tls.go
@@ -20,12 +20,14 @@ package tls
 import (
 	"crypto/tls"
 	"crypto/x509"
+	"net"
 	"reflect"
 
 	"github.com/vdaas/vald/internal/errors"
 	"github.com/vdaas/vald/internal/io/ioutil"
 )
 
+type Conn = tls.Conn
 type Config = tls.Config
 
 type credentials struct {
@@ -123,3 +125,7 @@ func newCredential(opts ...Option) (c *credentials, err error) {
 	c.cfg.InsecureSkipVerify = c.insecure
 	return c, nil
 }
+
+func Client(conn net.Conn, config *Config)*Conn{
+	return tls.Client(conn, config)
+}

From d0c1eed46c5c6f92360c5222e98a96c3a8686073 Mon Sep 17 00:00:00 2001
From: kpango <kpango@vdaas.org>
Date: Tue, 9 Feb 2021 17:42:00 +0900
Subject: [PATCH 20/22] format

Signed-off-by: kpango <kpango@vdaas.org>
---
 internal/tls/tls.go | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/internal/tls/tls.go b/internal/tls/tls.go
index 69a2d0dcfa..293e6bc163 100644
--- a/internal/tls/tls.go
+++ b/internal/tls/tls.go
@@ -27,8 +27,10 @@ import (
 	"github.com/vdaas/vald/internal/io/ioutil"
 )
 
-type Conn = tls.Conn
-type Config = tls.Config
+type (
+	Conn   = tls.Conn
+	Config = tls.Config
+)
 
 type credentials struct {
 	cfg      *tls.Config
@@ -126,6 +128,6 @@ func newCredential(opts ...Option) (c *credentials, err error) {
 	return c, nil
 }
 
-func Client(conn net.Conn, config *Config)*Conn{
+func Client(conn net.Conn, config *Config) *Conn {
 	return tls.Client(conn, config)
 }

From f2385eea0185123da2bd024f13f15a6e8dbed154 Mon Sep 17 00:00:00 2001
From: Yusuke Kato <kpango@vdaas.org>
Date: Tue, 9 Feb 2021 18:40:38 +0900
Subject: [PATCH 21/22] Update internal/tls/option_test.go

Co-authored-by: Kiichiro YUKAWA <kyukawa315@gmail.com>
---
 internal/tls/option_test.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/internal/tls/option_test.go b/internal/tls/option_test.go
index 4a2bc6a0eb..c94cf5aa27 100644
--- a/internal/tls/option_test.go
+++ b/internal/tls/option_test.go
@@ -378,7 +378,11 @@ func TestWithInsecureSkipVerify(t *testing.T) {
 		},
 	}
 
-	for _, test := range tests {
+	for _, tc := range tests {
+		test := tc
+		t.Run(tt, func() {
+			tt.Parallel()
+		})
 		t.Run(test.name, func(tt *testing.T) {
 			defer goleak.VerifyNone(tt, goleakIgnoreOptions...)
 			if test.beforeFunc != nil {

From 06aa29415767b1e186d0a611693f4a4fad0a3d4f Mon Sep 17 00:00:00 2001
From: kpango <kpango@vdaas.org>
Date: Tue, 9 Feb 2021 18:57:04 +0900
Subject: [PATCH 22/22] fix failed test

Signed-off-by: kpango <kpango@vdaas.org>
---
 internal/tls/option_test.go | 30 ++++++++++++++++++------------
 1 file changed, 18 insertions(+), 12 deletions(-)

diff --git a/internal/tls/option_test.go b/internal/tls/option_test.go
index c94cf5aa27..a5b317b49e 100644
--- a/internal/tls/option_test.go
+++ b/internal/tls/option_test.go
@@ -77,9 +77,11 @@ func TestWithCert(t *testing.T) {
 		},
 	}
 
-	for _, test := range tests {
+	for _, tc := range tests {
+		test := tc
 		t.Run(test.name, func(tt *testing.T) {
-			defer goleak.VerifyNone(tt, goleakIgnoreOptions...)
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, append(goleakIgnoreOptions, goleak.IgnoreCurrent())...)
 			if test.beforeFunc != nil {
 				test.beforeFunc(test.args)
 			}
@@ -152,9 +154,11 @@ func TestWithKey(t *testing.T) {
 		},
 	}
 
-	for _, test := range tests {
+	for _, tc := range tests {
+		test := tc
 		t.Run(test.name, func(tt *testing.T) {
-			defer goleak.VerifyNone(tt, goleakIgnoreOptions...)
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, append(goleakIgnoreOptions, goleak.IgnoreCurrent())...)
 			if test.beforeFunc != nil {
 				test.beforeFunc(test.args)
 			}
@@ -227,9 +231,11 @@ func TestWithCa(t *testing.T) {
 		},
 	}
 
-	for _, test := range tests {
+	for _, tc := range tests {
+		test := tc
 		t.Run(test.name, func(tt *testing.T) {
-			defer goleak.VerifyNone(tt, goleakIgnoreOptions...)
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, append(goleakIgnoreOptions, goleak.IgnoreCurrent())...)
 			if test.beforeFunc != nil {
 				test.beforeFunc(test.args)
 			}
@@ -303,9 +309,11 @@ func TestWithTLSConfig(t *testing.T) {
 		},
 	}
 
-	for _, test := range tests {
+	for _, tc := range tests {
+		test := tc
 		t.Run(test.name, func(tt *testing.T) {
-			defer goleak.VerifyNone(tt, goleakIgnoreOptions...)
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, append(goleakIgnoreOptions, goleak.IgnoreCurrent())...)
 			if test.beforeFunc != nil {
 				test.beforeFunc(test.args)
 			}
@@ -380,11 +388,9 @@ func TestWithInsecureSkipVerify(t *testing.T) {
 
 	for _, tc := range tests {
 		test := tc
-		t.Run(tt, func() {
-			tt.Parallel()
-		})
 		t.Run(test.name, func(tt *testing.T) {
-			defer goleak.VerifyNone(tt, goleakIgnoreOptions...)
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, append(goleakIgnoreOptions, goleak.IgnoreCurrent())...)
 			if test.beforeFunc != nil {
 				test.beforeFunc(test.args)
 			}