diff --git a/CHANGELOG.md b/CHANGELOG.md index 7aa786fc..426e36d8 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -7,6 +7,7 @@ * Improve server startup message (#358, @areveny) * Introduce yaml linter. (#362, @miry) * Handle slicer toxic with zero `SizeVariation` and fix slicing randomization (#359, @areveny) +* Added /metrics endpoint for exposing Prometheus-compatible internal metrics (#366, @neufeldtech) # [2.3.0] - 2021-12-23 diff --git a/METRICS.md b/METRICS.md new file mode 100644 index 00000000..55111b82 --- /dev/null +++ b/METRICS.md @@ -0,0 +1,44 @@ +# Metrics + +- [Metrics](#metrics) + - [Runtime Metrics](#runtime-metrics) + - [Proxy Metrics](#proxy-metrics) + - [toxiproxy_proxy_received_bytes_total / toxiproxy_proxy_sent_bytes_total](#toxiproxy_proxy_received_bytes_total--toxiproxy_proxy_sent_bytes_total) + +### Runtime Metrics + +To enable runtime metrics related to the state of the go runtime, build version, process info, use the `-runtime-metrics` flag. + +For more details, see below: +- [NewGoCollector](https://pkg.go.dev/github.com/prometheus/client_golang/prometheus/collectors#NewGoCollector) +- [NewBuildInfoCollector](https://pkg.go.dev/github.com/prometheus/client_golang/prometheus/collectors#NewBuildInfoCollector) +- [NewProcessCollector](https://pkg.go.dev/github.com/prometheus/client_golang/prometheus/collectors#NewProcessCollector) + +### Proxy Metrics + +To enable metrics related to toxiproxy internals, use the `-proxy-metrics` flag. +#### toxiproxy_proxy_received_bytes_total / toxiproxy_proxy_sent_bytes_total + +The total number of bytes received/sent on a given proxy link in a given direction + +```mermaid +sequenceDiagram + Client->>+Toxiproxy: toxiproxy_proxy_received_bytes_total{direction="upstream"} + Toxiproxy->>+Server: toxiproxy_proxy_sent_bytes_total{direction="upstream"} + Server->>+Toxiproxy: toxiproxy_proxy_received_bytes_total{direction="downstream"} + Toxiproxy->>+Client: toxiproxy_proxy_sent_bytes_total{direction="downstream"} +``` + +**Type** + +Counter + +**Labels** + +| Label | Description | Example | +|-----------|--------------------------------|-----------------------| +| direction | Direction of the link | upstream / downstream | +| listener | Listener address of this proxy | 0.0.0.0:8080 | +| proxy | Proxy name | my-proxy | +| upstream | Upstream address of this proxy | httpbin.org:80 | + diff --git a/README.md b/README.md index 95f391f6..332c1fa1 100644 --- a/README.md +++ b/README.md @@ -41,31 +41,36 @@ stopping you from creating a client in any other language (see ## Table of Contents -1. [Why yet another chaotic TCP proxy?](#why-yet-another-chaotic-tcp-proxy) -2. [Clients](#clients) -3. [Example](#example) -4. [Usage](#usage) - 1. [Installing](#1-installing-toxiproxy) - 1. [Upgrading from 1.x](#upgrading-from-toxiproxy-1x) - 2. [Populating](#2-populating-toxiproxy) - 3. [Using](#3-using-toxiproxy) - 4. [Logging](#4-logging) -5. [Toxics](#toxics) - 1. [Latency](#latency) - 2. [Down](#down) - 3. [Bandwidth](#bandwidth) - 4. [Slow close](#slow_close) - 5. [Timeout](#timeout) - 6. [Reset peer](#reset_peer) - 7. [Slicer](#slicer) -6. [HTTP API](#http-api) - 1. [Proxy fields](#proxy-fields) - 2. [Toxic fields](#toxic-fields) - 3. [Endpoints](#endpoints) - 4. [Populating Proxies](#populating-proxies) -7. [CLI example](#cli-example) -8. [FAQ](#frequently-asked-questions) -9. [Development](#development) +- [Toxiproxy](#toxiproxy) + - [Table of Contents](#table-of-contents) + - [Why yet another chaotic TCP proxy?](#why-yet-another-chaotic-tcp-proxy) + - [Clients](#clients) + - [Example](#example) + - [Usage](#usage) + - [1. Installing Toxiproxy](#1-installing-toxiproxy) + - [Upgrading from Toxiproxy 1.x](#upgrading-from-toxiproxy-1x) + - [2. Populating Toxiproxy](#2-populating-toxiproxy) + - [3. Using Toxiproxy](#3-using-toxiproxy) + - [4. Logging](#4-logging) + - [Toxics](#toxics) + - [latency](#latency) + - [down](#down) + - [bandwidth](#bandwidth) + - [slow_close](#slow_close) + - [timeout](#timeout) + - [reset_peer](#reset_peer) + - [slicer](#slicer) + - [limit_data](#limit_data) + - [HTTP API](#http-api) + - [Proxy fields:](#proxy-fields) + - [Toxic fields:](#toxic-fields) + - [Endpoints](#endpoints) + - [Populating Proxies](#populating-proxies) + - [CLI Example](#cli-example) + - [Metrics](#metrics) + - [Frequently Asked Questions](#frequently-asked-questions) + - [Development](#development) + - [Release](#release) ## Why yet another chaotic TCP proxy? @@ -497,6 +502,7 @@ All endpoints are JSON. - **DELETE /proxies/{proxy}/toxics/{toxic}** - Remove an active toxic - **POST /reset** - Enable all proxies and remove all active toxics - **GET /version** - Returns the server version number + - **GET /metrics** - Returns Prometheus-compatible metrics #### Populating Proxies @@ -565,6 +571,11 @@ $ redis-cli -p 26379 Could not connect to Redis at 127.0.0.1:26379: Connection refused ``` +### Metrics + +Toxiproxy exposes Prometheus-compatible metrics via its HTTP API at /metrics. +See [METRICS.md](./METRICS.md) for full descriptions + ### Frequently Asked Questions **How fast is Toxiproxy?** The speed of Toxiproxy depends largely on your hardware, diff --git a/api.go b/api.go index fa9e74ee..bddeb399 100644 --- a/api.go +++ b/api.go @@ -16,11 +16,13 @@ import ( type ApiServer struct { Collection *ProxyCollection + Metrics *metricsContainer } -func NewServer() *ApiServer { +func NewServer(m *metricsContainer) *ApiServer { return &ApiServer{ Collection: NewProxyCollection(), + Metrics: m, } } @@ -34,7 +36,7 @@ func (server *ApiServer) PopulateConfig(filename string) { return } - proxies, err := server.Collection.PopulateJson(file) + proxies, err := server.Collection.PopulateJson(server, file) if err != nil { logrus.WithFields(logrus.Fields{ "config": filename, @@ -75,6 +77,10 @@ func (server *ApiServer) Listen(host string, port string) { r.HandleFunc("/version", server.Version).Methods("GET") + if server.Metrics.anyMetricsEnabled() { + r.Handle("/metrics", server.Metrics.handler()) + } + http.Handle("/", StopBrowsersMiddleware(r)) logrus.WithFields(logrus.Fields{ @@ -145,7 +151,7 @@ func (server *ApiServer) ProxyCreate(response http.ResponseWriter, request *http return } - proxy := NewProxy() + proxy := NewProxy(server) proxy.Name = input.Name proxy.Listen = input.Listen proxy.Upstream = input.Upstream @@ -169,7 +175,7 @@ func (server *ApiServer) ProxyCreate(response http.ResponseWriter, request *http } func (server *ApiServer) Populate(response http.ResponseWriter, request *http.Request) { - proxies, err := server.Collection.PopulateJson(request.Body) + proxies, err := server.Collection.PopulateJson(server, request.Body) apiErr, ok := err.(*ApiError) if !ok && err != nil { diff --git a/api_test.go b/api_test.go index 175fc91d..548ab0a8 100644 --- a/api_test.go +++ b/api_test.go @@ -9,6 +9,7 @@ import ( "github.com/Shopify/toxiproxy/v2" tclient "github.com/Shopify/toxiproxy/v2/client" + "github.com/prometheus/client_golang/prometheus" ) var testServer *toxiproxy.ApiServer @@ -19,7 +20,8 @@ func WithServer(t *testing.T, f func(string)) { // Make sure only one server is running at a time. Apparently there's no clean // way to shut it down between each test run. if testServer == nil { - testServer = toxiproxy.NewServer() + testServer = toxiproxy.NewServer(toxiproxy.NewMetricsContainer(prometheus.NewRegistry())) + go testServer.Listen("localhost", "8475") // Allow server to start. There's no clean way to know when it listens. diff --git a/cmd/server/server.go b/cmd/server/server.go index f65dc388..2f41fa8e 100644 --- a/cmd/server/server.go +++ b/cmd/server/server.go @@ -10,17 +10,21 @@ import ( "syscall" "time" + "github.com/prometheus/client_golang/prometheus" "github.com/sirupsen/logrus" "github.com/Shopify/toxiproxy/v2" + "github.com/Shopify/toxiproxy/v2/collectors" ) type cliArguments struct { - host string - port string - config string - seed int64 - printVersion bool + host string + port string + config string + seed int64 + printVersion bool + proxyMetrics bool + runtimeMetrics bool } func parseArguments() cliArguments { @@ -33,6 +37,10 @@ func parseArguments() cliArguments { "JSON file containing proxies to create on startup") flag.Int64Var(&result.seed, "seed", time.Now().UTC().UnixNano(), "Seed for randomizing toxics with") + flag.BoolVar(&result.runtimeMetrics, "runtime-metrics", false, + `enable runtime-related prometheus metrics (default "false")`) + flag.BoolVar(&result.proxyMetrics, "proxy-metrics", false, + `enable toxiproxy-specific prometheus metrics (default "false")`) flag.BoolVar(&result.printVersion, "version", false, `print the version (default "false")`) flag.Parse() @@ -63,7 +71,14 @@ func run(cli cliArguments) { rand.Seed(cli.seed) - server := toxiproxy.NewServer() + metrics := toxiproxy.NewMetricsContainer(prometheus.NewRegistry()) + server := toxiproxy.NewServer(metrics) + if cli.proxyMetrics { + server.Metrics.ProxyMetrics = collectors.NewProxyMetricCollectors() + } + if cli.runtimeMetrics { + server.Metrics.RuntimeMetrics = collectors.NewRuntimeMetricCollectors() + } if len(cli.config) > 0 { server.PopulateConfig(cli.config) } diff --git a/collectors/common.go b/collectors/common.go new file mode 100644 index 00000000..ba4f4792 --- /dev/null +++ b/collectors/common.go @@ -0,0 +1,5 @@ +package collectors + +const ( + namespace string = "toxiproxy" +) diff --git a/collectors/proxy.go b/collectors/proxy.go new file mode 100644 index 00000000..b178822b --- /dev/null +++ b/collectors/proxy.go @@ -0,0 +1,46 @@ +package collectors + +import ( + "github.com/prometheus/client_golang/prometheus" +) + +type ProxyMetricCollectors struct { + collectors []prometheus.Collector + proxyLabels []string + + ReceivedBytesTotal *prometheus.CounterVec + SentBytesTotal *prometheus.CounterVec +} + +func (c *ProxyMetricCollectors) Collectors() []prometheus.Collector { + return c.collectors +} + +func NewProxyMetricCollectors() *ProxyMetricCollectors { + var m ProxyMetricCollectors + m.proxyLabels = []string{ + "direction", + "proxy", + "listener", + "upstream", + } + m.ReceivedBytesTotal = prometheus.NewCounterVec( + prometheus.CounterOpts{ + Namespace: namespace, + Subsystem: "proxy", + Name: "received_bytes_total", + }, + m.proxyLabels) + m.collectors = append(m.collectors, m.ReceivedBytesTotal) + + m.SentBytesTotal = prometheus.NewCounterVec( + prometheus.CounterOpts{ + Namespace: namespace, + Subsystem: "proxy", + Name: "sent_bytes_total", + }, + m.proxyLabels) + m.collectors = append(m.collectors, m.SentBytesTotal) + + return &m +} diff --git a/collectors/runtime.go b/collectors/runtime.go new file mode 100644 index 00000000..215368a1 --- /dev/null +++ b/collectors/runtime.go @@ -0,0 +1,23 @@ +package collectors + +import ( + "github.com/prometheus/client_golang/prometheus" + "github.com/prometheus/client_golang/prometheus/collectors" +) + +type RuntimeMetricCollectors struct { + collectors []prometheus.Collector +} + +func (c *RuntimeMetricCollectors) Collectors() []prometheus.Collector { + return c.collectors +} + +func NewRuntimeMetricCollectors() *RuntimeMetricCollectors { + var m RuntimeMetricCollectors + m.collectors = append(m.collectors, collectors.NewGoCollector()) + m.collectors = append(m.collectors, collectors.NewBuildInfoCollector()) + m.collectors = append(m.collectors, + collectors.NewProcessCollector(collectors.ProcessCollectorOpts{})) + return &m +} diff --git a/go.mod b/go.mod index b183e356..d81a71a5 100644 --- a/go.mod +++ b/go.mod @@ -4,6 +4,7 @@ go 1.17 require ( github.com/gorilla/mux v1.8.0 + github.com/prometheus/client_golang v1.12.1 github.com/sirupsen/logrus v1.8.1 github.com/urfave/cli/v2 v2.3.0 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 @@ -11,8 +12,16 @@ require ( ) require ( + github.com/beorn7/perks v1.0.1 // indirect + github.com/cespare/xxhash/v2 v2.1.2 // indirect github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d // indirect + github.com/golang/protobuf v1.5.2 // indirect + github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect + github.com/prometheus/client_model v0.2.0 // indirect + github.com/prometheus/common v0.32.1 // indirect + github.com/prometheus/procfs v0.7.3 // indirect github.com/russross/blackfriday/v2 v2.0.1 // indirect github.com/shurcooL/sanitized_anchor_name v1.0.0 // indirect - golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1 // indirect + golang.org/x/sys v0.0.0-20220114195835-da31bd327af9 // indirect + google.golang.org/protobuf v1.26.0 // indirect ) diff --git a/go.sum b/go.sum index 825c6531..b0de16d9 100644 --- a/go.sum +++ b/go.sum @@ -1,28 +1,486 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU= +cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU= +cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY= +cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc= +cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0= +cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To= +cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4= +cloud.google.com/go v0.53.0/go.mod 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h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ= +cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE= +cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk= +cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I= +cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw= +cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA= +cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU= +cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw= +cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos= +cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk= +cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs= +cloud.google.com/go/storage 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h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k= +honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k= +rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8= +rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0= +rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA= diff --git a/link.go b/link.go index 08e09597..5abbbc81 100644 --- a/link.go +++ b/link.go @@ -43,7 +43,6 @@ func NewToxicLink( toxics: collection, direction: direction, } - // Initialize the link with ToxicStubs last := make(chan *stream.StreamChunk) // The first toxic is always a noop link.input = stream.NewChanWriter(last) @@ -63,18 +62,19 @@ func NewToxicLink( } // Start the link with the specified toxics. -func (link *ToxicLink) Start(name string, source io.Reader, dest io.WriteCloser) { - go func() { - bytes, err := io.Copy(link.input, source) - if err != nil { - logrus.WithFields(logrus.Fields{ - "name": link.proxy.Name, - "bytes": bytes, - "err": err, - }).Warn("Source terminated") - } - link.input.Close() - }() +func (link *ToxicLink) Start( + server *ApiServer, + name string, + source io.Reader, + dest io.WriteCloser, +) { + labels := []string{ + link.Direction(), + link.proxy.Name, + link.proxy.Listen, + link.proxy.Upstream} + + go link.read(labels, server, source) for i, toxic := range link.toxics.chain[link.direction] { if stateful, ok := toxic.Toxic.(toxics.StatefulToxic); ok { @@ -102,19 +102,52 @@ func (link *ToxicLink) Start(name string, source io.Reader, dest io.WriteCloser) go link.stubs[i].Run(toxic) } - go func() { - bytes, err := io.Copy(dest, link.output) - if err != nil { - logrus.WithFields(logrus.Fields{ - "name": link.proxy.Name, - "bytes": bytes, - "err": err, - }).Warn("Destination terminated") - } - dest.Close() - link.toxics.RemoveLink(name) - link.proxy.RemoveConnection(name) - }() + go link.write(labels, name, server, dest) +} + +// read copies bytes from a source to the link's input channel. +func (link *ToxicLink) read( + metricLabels []string, + server *ApiServer, + source io.Reader, +) { + bytes, err := io.Copy(link.input, source) + if err != nil { + logrus.WithFields(logrus.Fields{ + "name": link.proxy.Name, + "bytes": bytes, + "err": err, + }).Warn("Source terminated") + } + if server.Metrics.proxyMetricsEnabled() { + server.Metrics.ProxyMetrics.ReceivedBytesTotal. + WithLabelValues(metricLabels...).Add(float64(bytes)) + } + link.input.Close() +} + +// write copies bytes from the link's output channel to a destination. +func (link *ToxicLink) write( + metricLabels []string, + name string, + server *ApiServer, + dest io.WriteCloser, +) { + bytes, err := io.Copy(dest, link.output) + if err != nil { + logrus.WithFields(logrus.Fields{ + "name": link.proxy.Name, + "bytes": bytes, + "err": err, + }).Warn("Destination terminated") + } + if server.Metrics.proxyMetricsEnabled() { + server.Metrics.ProxyMetrics.SentBytesTotal. + WithLabelValues(metricLabels...).Add(float64(bytes)) + } + dest.Close() + link.toxics.RemoveLink(name) + link.proxy.RemoveConnection(name) } // Add a toxic to the end of the chain. @@ -204,3 +237,11 @@ func (link *ToxicLink) RemoveToxic(toxic *toxics.ToxicWrapper) { go link.stubs[i-1].Run(link.toxics.chain[link.direction][i-1]) } } + +// Direction returns the direction of the link (upstream or downstream). +func (link *ToxicLink) Direction() string { + if link.direction == stream.Upstream { + return "upstream" + } + return "downstream" +} diff --git a/metrics.go b/metrics.go new file mode 100644 index 00000000..8870ab10 --- /dev/null +++ b/metrics.go @@ -0,0 +1,52 @@ +package toxiproxy + +import ( + "net/http" + + "github.com/Shopify/toxiproxy/v2/collectors" + "github.com/prometheus/client_golang/prometheus" + "github.com/prometheus/client_golang/prometheus/promhttp" +) + +// NewMetricsContainer initializes a container for storing all prometheus metrics. +func NewMetricsContainer(registry *prometheus.Registry) *metricsContainer { + if registry == nil { + registry = prometheus.NewRegistry() + } + return &metricsContainer{ + registry: registry, + } +} + +type metricsContainer struct { + RuntimeMetrics *collectors.RuntimeMetricCollectors + ProxyMetrics *collectors.ProxyMetricCollectors + + registry *prometheus.Registry +} + +func (m *metricsContainer) runtimeMetricsEnabled() bool { + return m.RuntimeMetrics != nil +} + +func (m *metricsContainer) proxyMetricsEnabled() bool { + return m.ProxyMetrics != nil +} + +// anyMetricsEnabled determines whether we have any prometheus metrics registered for exporting. +func (m *metricsContainer) anyMetricsEnabled() bool { + return m.runtimeMetricsEnabled() || m.proxyMetricsEnabled() +} + +// handler returns an HTTP handler with the necessary collectors registered +// via a global prometheus registry. +func (m *metricsContainer) handler() http.Handler { + if m.runtimeMetricsEnabled() { + m.registry.MustRegister(m.RuntimeMetrics.Collectors()...) + } + if m.proxyMetricsEnabled() { + m.registry.MustRegister(m.ProxyMetrics.Collectors()...) + } + return promhttp.HandlerFor( + m.registry, promhttp.HandlerOpts{Registry: m.registry}) +} diff --git a/metrics_test.go b/metrics_test.go new file mode 100644 index 00000000..f83ffcde --- /dev/null +++ b/metrics_test.go @@ -0,0 +1,78 @@ +package toxiproxy + +import ( + "bufio" + "bytes" + "net/http" + "net/http/httptest" + "reflect" + "strings" + "testing" + + "github.com/Shopify/toxiproxy/v2/collectors" + "github.com/Shopify/toxiproxy/v2/stream" + "github.com/prometheus/client_golang/prometheus" +) + +func TestProxyMetricsReceivedSentBytes(t *testing.T) { + expectedMetrics := []string{ + + `toxiproxy_proxy_received_bytes_total{direction="upstream",listener="localhost:0",proxy="test",upstream="upstream"} 5`, //nolint + `toxiproxy_proxy_sent_bytes_total{direction="upstream",listener="localhost:0",proxy="test",upstream="upstream"} 5`, //nolint + } + srv := NewServer(NewMetricsContainer(prometheus.NewRegistry())) + srv.Metrics.ProxyMetrics = collectors.NewProxyMetricCollectors() + proxy := NewProxy(srv) + proxy.Name = "test" + proxy.Listen = "localhost:0" + proxy.Upstream = "upstream" + r := bufio.NewReader(bytes.NewBufferString("hello")) + w := &testWriteCloser{ + bufio.NewWriter(bytes.NewBuffer([]byte{})), + } + proxy.Toxics.StartLink(srv, "testupstream", r, w, stream.Upstream) + gotMetrics := prometheusOutput(t, srv, "toxiproxy") + if !reflect.DeepEqual(gotMetrics, expectedMetrics) { + t.Fatalf("expected: %v got: %v", expectedMetrics, gotMetrics) + } +} +func TestRuntimeMetricsBuildInfo(t *testing.T) { + expectedMetrics := []string{ + `go_build_info{checksum="unknown",path="unknown",version="unknown"} 1`, + } + srv := NewServer(NewMetricsContainer(prometheus.NewRegistry())) + srv.Metrics.RuntimeMetrics = collectors.NewRuntimeMetricCollectors() + + gotMetrics := prometheusOutput(t, srv, "go_build_info") + if !reflect.DeepEqual(gotMetrics, expectedMetrics) { + t.Fatalf("expected: %v got: %v", expectedMetrics, gotMetrics) + } +} + +type testWriteCloser struct { + *bufio.Writer +} + +func (t *testWriteCloser) Close() error { + return t.Flush() +} + +func prometheusOutput(t *testing.T, apiServer *ApiServer, prefix string) []string { + t.Helper() + + testServer := httptest.NewServer(apiServer.Metrics.handler()) + defer testServer.Close() + resp, err := http.Get(testServer.URL) + if err != nil { + t.Fatal(err) + } + defer resp.Body.Close() + var selected []string + s := bufio.NewScanner(resp.Body) + for s.Scan() { + if strings.HasPrefix(s.Text(), prefix) { + selected = append(selected, s.Text()) + } + } + return selected +} diff --git a/proxy.go b/proxy.go index e9104469..8a1f8dc3 100644 --- a/proxy.go +++ b/proxy.go @@ -30,6 +30,7 @@ type Proxy struct { tomb tomb.Tomb connections ConnectionList Toxics *ToxicCollection `json:"-"` + apiServer *ApiServer } type ConnectionList struct { @@ -47,10 +48,11 @@ func (c *ConnectionList) Unlock() { var ErrProxyAlreadyStarted = errors.New("Proxy already started") -func NewProxy() *Proxy { +func NewProxy(server *ApiServer) *Proxy { proxy := &Proxy{ started: make(chan error), connections: ConnectionList{list: make(map[string]net.Conn)}, + apiServer: server, } proxy.Toxics = NewToxicCollection(proxy) return proxy @@ -194,8 +196,8 @@ func (proxy *Proxy) server() { proxy.connections.list[name+"upstream"] = upstream proxy.connections.list[name+"downstream"] = client proxy.connections.Unlock() - proxy.Toxics.StartLink(name+"upstream", client, upstream, stream.Upstream) - proxy.Toxics.StartLink(name+"downstream", upstream, client, stream.Downstream) + proxy.Toxics.StartLink(proxy.apiServer, name+"upstream", client, upstream, stream.Upstream) + proxy.Toxics.StartLink(proxy.apiServer, name+"downstream", upstream, client, stream.Downstream) } } diff --git a/proxy_collection.go b/proxy_collection.go index 8f9ab001..f79be152 100644 --- a/proxy_collection.go +++ b/proxy_collection.go @@ -66,7 +66,10 @@ func (collection *ProxyCollection) AddOrReplace(proxy *Proxy, start bool) error return nil } -func (collection *ProxyCollection) PopulateJson(data io.Reader) ([]*Proxy, error) { +func (collection *ProxyCollection) PopulateJson( + server *ApiServer, + data io.Reader, +) ([]*Proxy, error) { input := []struct { Proxy Enabled *bool `json:"enabled"` // Overrides Proxy field to make field nullable @@ -94,7 +97,7 @@ func (collection *ProxyCollection) PopulateJson(data io.Reader) ([]*Proxy, error proxies := make([]*Proxy, 0, len(input)) for i := range input { - proxy := NewProxy() + proxy := NewProxy(server) proxy.Name = input[i].Name proxy.Listen = input[i].Listen proxy.Upstream = input[i].Upstream diff --git a/scripts/test-e2e b/scripts/test-e2e index ea789928..77a4d6cc 100755 --- a/scripts/test-e2e +++ b/scripts/test-e2e @@ -8,7 +8,7 @@ wait_for_url() { } # Stop all background jobs on exit -trap 'pkill -15 -f "dist/toxiproxy-server$"; pkill -15 -f "exe/endpoint$"' \ +trap 'pkill -15 -f "dist/toxiproxy-server -proxy-metrics -runtime-metrics$"; pkill -15 -f "exe/endpoint$"' \ EXIT SIGINT SIGTERM echo "=== Starting Web service" @@ -17,7 +17,7 @@ go run test/e2e/endpoint.go 2>&1 | sed -e 's/^/[web] /' & echo "=== Starting Toxiproxy" -LOG_LEVEL=debug ./dist/toxiproxy-server 2>&1 | sed -e 's/^/[toxiproxy] /' & +LOG_LEVEL=debug ./dist/toxiproxy-server -proxy-metrics -runtime-metrics 2>&1 | sed -e 's/^/[toxiproxy] /' & echo "=== Wait when service are available" @@ -146,6 +146,13 @@ echo "=== Reset peer toxic" echo -e "-----------------\n" +echo "=== Metrics test" +wait_for_url http://localhost:20000/test1 +curl -s http://localhost:8474/metrics | grep -E '^toxiproxy_proxy_sent_bytes_total{direction="downstream",listener="127.0.0.1:20000",proxy="shopify_http",upstream="localhost:20002"} [0-9]+' +curl -s http://localhost:8474/metrics | grep -E '^go_info' +curl -s http://localhost:8474/metrics | grep -E '^go_goroutines' +echo -e "-----------------\n" + echo "== Teardown" ./dist/toxiproxy-cli delete shopify_http diff --git a/toxic_collection.go b/toxic_collection.go index 87a24a76..721f8199 100644 --- a/toxic_collection.go +++ b/toxic_collection.go @@ -173,6 +173,7 @@ func (c *ToxicCollection) RemoveToxic(name string) error { } func (c *ToxicCollection) StartLink( + server *ApiServer, name string, input io.Reader, output io.WriteCloser, @@ -182,7 +183,7 @@ func (c *ToxicCollection) StartLink( defer c.Unlock() link := NewToxicLink(c.proxy, c, direction) - link.Start(name, input, output) + link.Start(server, name, input, output) c.links[name] = link } diff --git a/toxics/toxic_test.go b/toxics/toxic_test.go index 1226601a..78070cbd 100644 --- a/toxics/toxic_test.go +++ b/toxics/toxic_test.go @@ -11,7 +11,9 @@ import ( "time" "github.com/Shopify/toxiproxy/v2" + "github.com/Shopify/toxiproxy/v2/collectors" "github.com/Shopify/toxiproxy/v2/toxics" + "github.com/prometheus/client_golang/prometheus" "github.com/sirupsen/logrus" tomb "gopkg.in/tomb.v1" ) @@ -21,7 +23,9 @@ func init() { } func NewTestProxy(name, upstream string) *toxiproxy.Proxy { - proxy := toxiproxy.NewProxy() + srv := toxiproxy.NewServer(toxiproxy.NewMetricsContainer(prometheus.NewRegistry())) + srv.Metrics.ProxyMetrics = collectors.NewProxyMetricCollectors() + proxy := toxiproxy.NewProxy(srv) proxy.Name = name proxy.Listen = "localhost:0" diff --git a/toxiproxy_test.go b/toxiproxy_test.go index eefa2c40..16a1f03f 100644 --- a/toxiproxy_test.go +++ b/toxiproxy_test.go @@ -5,11 +5,15 @@ import ( "testing" "github.com/Shopify/toxiproxy/v2" + "github.com/Shopify/toxiproxy/v2/collectors" "github.com/Shopify/toxiproxy/v2/testhelper" + "github.com/prometheus/client_golang/prometheus" ) func NewTestProxy(name, upstream string) *toxiproxy.Proxy { - proxy := toxiproxy.NewProxy() + srv := toxiproxy.NewServer(toxiproxy.NewMetricsContainer(prometheus.NewRegistry())) + srv.Metrics.ProxyMetrics = collectors.NewProxyMetricCollectors() + proxy := toxiproxy.NewProxy(srv) proxy.Name = name proxy.Listen = "localhost:0"