Expose some more information on containers.

probe/docker/container.go

@@ -13,15 +13,20 @@ import (
 	"strconv"
 	"strings"
 	"sync"
+	"time"
 
 	docker "github.com/fsouza/go-dockerclient"
 
 	"github.com/weaveworks/scope/report"
 )
 
 // These constants are keys used in node metadata
-// TODO: use these constants in report/{mapping.go, detailed_node.go} - pending some circular references
 const (
+	ContainerName    = "docker_container_name"
+	ContainerCommand = "docker_container_command"
+	ContainerPorts   = "docker_container_ports"
+	ContainerCreated = "docker_container_created"
+
 	NetworkRxDropped = "network_rx_dropped"
 	NetworkRxBytes   = "network_rx_bytes"
 	NetworkRxErrors  = "network_rx_errors"
@@ -59,7 +64,7 @@ type ClientConn interface {
 	Close() error
 }
 
-// Container represents a docker container
+// Container represents a Docker container
 type Container interface {
 	ID() string
 	Image() string
@@ -163,7 +168,6 @@ func (c *container) StartGatheringStats() error {
 	return nil
 }
 
-// called whilst holding t.Lock()
 func (c *container) StopGatheringStats() {
 	c.Lock()
 	defer c.Unlock()
@@ -178,15 +182,36 @@ func (c *container) StopGatheringStats() {
 	return
 }
 
-// called whilst holding t.RLock()
+func (c *container) ports() string {
+	if c.container.NetworkSettings == nil {
+		return ""
+	}
+
+	ports := []string{}
+	for port, bindings := range c.container.NetworkSettings.Ports {
+		if len(bindings) == 0 {
+			ports = append(ports, fmt.Sprintf("%s", port))
+			continue
+		}
+		for _, b := range bindings {
+			ports = append(ports, fmt.Sprintf("%s:%s->%s", b.HostIP, b.HostPort, port))
+		}
+	}
+
+	return strings.Join(ports, ", ")
+}
+
 func (c *container) GetNodeMetadata() report.NodeMetadata {
 	c.RLock()
 	defer c.RUnlock()
 
 	result := report.NodeMetadata{
-		ContainerID:   c.ID(),
-		ContainerName: strings.TrimPrefix(c.container.Name, "/"),
-		ImageID:       c.container.Image,
+		ContainerID:      c.ID(),
+		ContainerName:    strings.TrimPrefix(c.container.Name, "/"),
+		ContainerPorts:   c.ports(),
+		ContainerCreated: c.container.Created.Format(time.RFC822),
+		ContainerCommand: c.container.Path + " " + strings.Join(c.container.Args, " "),
+		ImageID:          c.container.Image,
 	}
 
 	if c.latestStats == nil {

probe/docker/reporter.go

@@ -8,9 +8,8 @@ import (
 
 // Keys for use in NodeMetadata
 const (
-	ContainerName = "docker_container_name"
-	ImageID       = "docker_image_id"
-	ImageName     = "docker_image_name"
+	ImageID   = "docker_image_id"
+	ImageName = "docker_image_name"
 )
 
 // Reporter generate Reports containing Container and ContainerImage topologies

render/detailed_node.go

@@ -1,12 +1,18 @@
 package render
 
 import (
+	"fmt"
 	"reflect"
 	"strconv"
 
+	"github.com/weaveworks/scope/probe/docker"
 	"github.com/weaveworks/scope/report"
 )
 
+const (
+	mb = 1 << 20
+)
+
 // DetailedNode is the data type that's yielded to the JavaScript layer when
 // we want deep information about an individual node.
 type DetailedNode struct {
@@ -152,14 +158,26 @@ func processOriginTable(nmd report.NodeMetadata) (Table, bool) {
 func containerOriginTable(nmd report.NodeMetadata) (Table, bool) {
 	rows := []Row{}
 	for _, tuple := range []struct{ key, human string }{
-		{"docker_container_id", "Container ID"},
-		{"docker_container_name", "Container name"},
-		{"docker_image_id", "Container image ID"},
+		{docker.ContainerID, "ID"},
+		{docker.ContainerName, "Name"},
+		{docker.ImageID, "Image ID"},
+		{docker.ContainerPorts, "Ports"},
+		{docker.ContainerCreated, "Created"},
+		{docker.ContainerCommand, "Command"},
 	} {
 		if val, ok := nmd[tuple.key]; ok {
 			rows = append(rows, Row{Key: tuple.human, ValueMajor: val, ValueMinor: ""})
 		}
 	}
+
+	if val, ok := nmd[docker.MemoryUsage]; ok {
+		memory, err := strconv.ParseFloat(val, 64)
+		if err == nil {
+			memoryStr := fmt.Sprintf("%0.2f", memory/float64(mb))
+			rows = append(rows, Row{Key: "Memory Usage (MB):", ValueMajor: memoryStr, ValueMinor: ""})
+		}
+	}
+
 	return Table{
 		Title:   "Origin Container",
 		Numeric: false,
@@ -170,8 +188,8 @@ func containerOriginTable(nmd report.NodeMetadata) (Table, bool) {
 func containerImageOriginTable(nmd report.NodeMetadata) (Table, bool) {
 	rows := []Row{}
 	for _, tuple := range []struct{ key, human string }{
-		{"docker_image_id", "Container image ID"},
-		{"docker_image_name", "Container image name"},
+		{docker.ImageID, "Image ID"},
+		{docker.ImageName, "Image name"},
 	} {
 		if val, ok := nmd[tuple.key]; ok {
 			rows = append(rows, Row{Key: tuple.human, ValueMajor: val, ValueMinor: ""})

render/detailed_node_test.go

@@ -94,9 +94,9 @@ func TestMakeDetailedNode(t *testing.T) {
 				Title:   "Origin Container",
 				Numeric: false,
 				Rows: []render.Row{
-					{"Container ID", "5e4d3c2b1a", ""},
-					{"Container name", "server", ""},
-					{"Container image ID", "imageid456", ""},
+					{"ID", "5e4d3c2b1a", ""},
+					{"Name", "server", ""},
+					{"Image ID", "imageid456", ""},
 				},
 			},
 			{

render/mapping.go

@@ -5,6 +5,7 @@ import (
 	"net"
 	"strings"
 
+	"github.com/weaveworks/scope/probe/docker"
 	"github.com/weaveworks/scope/report"
 )
 
@@ -80,10 +81,10 @@ func MapProcessIdentity(m report.NodeMetadata) (RenderableNode, bool) {
 // nodes, we can safely assume the presences of certain keys.
 func MapContainerIdentity(m report.NodeMetadata) (RenderableNode, bool) {
 	var (
-		id    = m["docker_container_id"]
-		major = m["docker_container_name"]
+		id    = m[docker.ContainerID]
+		major = m[docker.ContainerName]
 		minor = report.ExtractHostID(m)
-		rank  = m["docker_image_id"]
+		rank  = m[docker.ImageID]
 	)
 
 	return NewRenderableNode(id, major, minor, rank, m), true
@@ -94,9 +95,9 @@ func MapContainerIdentity(m report.NodeMetadata) (RenderableNode, bool) {
 // topology nodes, we can safely assume the presences of certain keys.
 func MapContainerImageIdentity(m report.NodeMetadata) (RenderableNode, bool) {
 	var (
-		id    = m["docker_image_id"]
-		major = m["docker_image_name"]
-		rank  = m["docker_image_id"]
+		id    = m[docker.ImageID]
+		major = m[docker.ImageName]
+		rank  = m[docker.ImageID]
 	)
 
 	return NewRenderableNode(id, major, "", rank, m), true
@@ -181,7 +182,7 @@ func MapProcess2Container(n RenderableNode) (RenderableNode, bool) {
 
 	// Otherwise, if the process is not in a container, group it
 	// into an "Uncontained" node
-	id, ok := n.NodeMetadata["docker_container_id"]
+	id, ok := n.NodeMetadata[docker.ContainerID]
 	if !ok || n.Pseudo {
 		return newDerivedPseudoNode(UncontainedID, UncontainedMajor, n), true
 	}
@@ -231,7 +232,7 @@ func MapContainer2ContainerImage(n RenderableNode) (RenderableNode, bool) {
 
 	// Otherwise, if the process is not in a container, group it
 	// into an "Uncontained" node
-	id, ok := n.NodeMetadata["docker_image_id"]
+	id, ok := n.NodeMetadata[docker.ImageID]
 	if !ok || n.Pseudo {
 		return newDerivedPseudoNode(UncontainedID, UncontainedMajor, n), true
 	}

render/topologies_test.go

@@ -5,6 +5,7 @@ import (
 	"reflect"
 	"testing"
 
+	"github.com/weaveworks/scope/probe/docker"
 	"github.com/weaveworks/scope/render"
 	"github.com/weaveworks/scope/report"
 	"github.com/weaveworks/scope/test"
@@ -160,16 +161,16 @@ var (
 			Adjacency: report.Adjacency{},
 			NodeMetadatas: report.NodeMetadatas{
 				clientProcessNodeID: report.NodeMetadata{
-					"pid":                 clientPID,
-					"comm":                "curl",
-					"docker_container_id": clientContainerID,
-					report.HostNodeID:     clientHostNodeID,
+					"pid":              clientPID,
+					"comm":             "curl",
+					docker.ContainerID: clientContainerID,
+					report.HostNodeID:  clientHostNodeID,
 				},
 				serverProcessNodeID: report.NodeMetadata{
-					"pid":                 serverPID,
-					"comm":                "apache",
-					"docker_container_id": serverContainerID,
-					report.HostNodeID:     serverHostNodeID,
+					"pid":              serverPID,
+					"comm":             "apache",
+					docker.ContainerID: serverContainerID,
+					report.HostNodeID:  serverHostNodeID,
 				},
 				nonContainerProcessNodeID: report.NodeMetadata{
 					"pid":             nonContainerPID,
@@ -182,30 +183,30 @@ var (
 		Container: report.Topology{
 			NodeMetadatas: report.NodeMetadatas{
 				clientContainerNodeID: report.NodeMetadata{
-					"docker_container_id":   clientContainerID,
-					"docker_container_name": "client",
-					"docker_image_id":       clientContainerImageID,
-					report.HostNodeID:       clientHostNodeID,
+					docker.ContainerID:   clientContainerID,
+					docker.ContainerName: "client",
+					docker.ImageID:       clientContainerImageID,
+					report.HostNodeID:    clientHostNodeID,
 				},
 				serverContainerNodeID: report.NodeMetadata{
-					"docker_container_id":   serverContainerID,
-					"docker_container_name": "server",
-					"docker_image_id":       serverContainerImageID,
-					report.HostNodeID:       serverHostNodeID,
+					docker.ContainerID:   serverContainerID,
+					docker.ContainerName: "server",
+					docker.ImageID:       serverContainerImageID,
+					report.HostNodeID:    serverHostNodeID,
 				},
 			},
 		},
 		ContainerImage: report.Topology{
 			NodeMetadatas: report.NodeMetadatas{
 				clientContainerImageNodeID: report.NodeMetadata{
-					"docker_image_id":   clientContainerImageID,
-					"docker_image_name": "client_image",
-					report.HostNodeID:   clientHostNodeID,
+					docker.ImageID:    clientContainerImageID,
+					docker.ImageName:  "client_image",
+					report.HostNodeID: clientHostNodeID,
 				},
 				serverContainerImageNodeID: report.NodeMetadata{
-					"docker_image_id":   serverContainerImageID,
-					"docker_image_name": "server_image",
-					report.HostNodeID:   serverHostNodeID,
+					docker.ImageID:    serverContainerImageID,
+					docker.ImageName:  "server_image",
+					report.HostNodeID: serverHostNodeID,
 				},
 			},
 		},