Show docker swarm used ports

Dockerfile.dind

@@ -1,6 +1,8 @@
 FROM docker:1.13.0-rc2-dind
 
-ENV DOCKER_STORAGE_DRIVER=overlay2
+ARG docker_storage_driver=overlay2
+
+ENV DOCKER_STORAGE_DRIVER=${docker-storage-driver}
 
 RUN apk add --no-cache git tmux py-pip apache2-utils vim build-base gettext-dev curl bash
 

docker-compose.yml

@@ -6,7 +6,7 @@ services:
         # use the latest golang image
         image: golang
         # go to the right place and starts the app
-        command: /bin/sh -c 'cd /go/src/github.com/franela/play-with-docker; go run -race api.go'
+        command: /bin/sh -c 'cd /go/src/github.com/franela/play-with-docker; go run api.go'
         ports:
             # app exposes port 3000
             - "3000:3000"

services/broadcast_info_task.go

@@ -1,8 +0,0 @@
-package services
-
-type broadcastInfoTask struct {
-}
-
-func (c *broadcastInfoTask) Run(i *Instance) {
-	wsServer.BroadcastTo(i.session.Id, "instance stats", i.Name, i.Mem, i.Cpu, i.IsManager, i.Ports)
-}

services/check_swarm_status_task.go

@@ -1,6 +1,10 @@
 package services
 
-import "github.com/docker/docker/api/types/swarm"
+import (
+	"log"
+
+	"github.com/docker/docker/api/types/swarm"
+)
 
 type checkSwarmStatusTask struct {
 }
@@ -12,6 +16,8 @@ func (c checkSwarmStatusTask) Run(i *Instance) {
 		} else {
 			i.IsManager = nil
 		}
+	} else {
+		log.Println(err)
 	}
 
 }

services/check_swarm_used_ports.go

@@ -0,0 +1,15 @@
+package services
+
+import "log"
+
+type checkSwarmUsedPortsTask struct {
+}
+
+func (c checkSwarmUsedPortsTask) Run(i *Instance) {
+	if i.IsManager != nil && *i.IsManager {
+		// This is a swarm manager instance, then check for ports
+		if err := SetInstanceSwarmPorts(i); err != nil {
+			log.Println(err)
+		}
+	}
+}

services/check_used_ports_task.go

@@ -5,6 +5,8 @@ type checkUsedPortsTask struct {
 
 func (c checkUsedPortsTask) Run(i *Instance) {
 	if ports, err := GetUsedPorts(i); err == nil {
-		i.Ports = ports
+		for _, p := range ports {
+			i.setUsedPort(p)
+		}
 	}
 }

services/docker.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"io"
 	"log"
+	"strings"
 
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/container"
@@ -46,6 +47,55 @@ func GetDaemonInfo(i *Instance) (types.Info, error) {
 	}
 	return i.dockerClient.Info(context.Background())
 }
+
+func SetInstanceSwarmPorts(i *Instance) error {
+	if i.dockerClient == nil {
+		return fmt.Errorf("Docker client for DinD (%s) is not ready", i.IP)
+	}
+
+	hostnamesIdx := map[string]*Instance{}
+	for _, ins := range i.session.Instances {
+		hostnamesIdx[ins.Hostname] = ins
+	}
+
+	nodesIdx := map[string]*Instance{}
+	nodes, nodesErr := i.dockerClient.NodeList(context.Background(), types.NodeListOptions{})
+	if nodesErr != nil {
+		return nodesErr
+	}
+	for _, n := range nodes {
+		nodesIdx[n.ID] = hostnamesIdx[n.Description.Hostname]
+	}
+
+	tasks, err := i.dockerClient.TaskList(context.Background(), types.TaskListOptions{})
+	if err != nil {
+		return err
+	}
+	services := map[string][]uint16{}
+	for _, t := range tasks {
+		services[t.ServiceID] = []uint16{}
+	}
+	for serviceID, _ := range services {
+		s, _, err := i.dockerClient.ServiceInspectWithRaw(context.Background(), serviceID)
+		if err != nil {
+			return err
+		}
+		for _, p := range s.Endpoint.Ports {
+			services[serviceID] = append(services[serviceID], uint16(p.PublishedPort))
+		}
+	}
+	for _, t := range tasks {
+		for _, n := range nodes {
+			ins := nodesIdx[n.ID]
+			for _, p := range services[t.ServiceID] {
+				ins.setUsedPort(p)
+			}
+		}
+	}
+
+	return nil
+}
+
 func GetUsedPorts(i *Instance) ([]uint16, error) {
 	if i.dockerClient == nil {
 		return nil, fmt.Errorf("Docker client for DinD (%s) is not ready", i.IP)
@@ -84,7 +134,7 @@ func CreateNetwork(name string) error {
 func ConnectNetwork(containerId, networkId string) error {
 	err := c.NetworkConnect(context.Background(), networkId, containerId, &network.EndpointSettings{})
 
-	if err != nil {
+	if err != nil && !strings.Contains(err.Error(), "already exists") {
 		log.Printf("Connection container to network err [%s]\n", err)
 
 		return err

services/instance.go

@@ -28,6 +28,19 @@ type Instance struct {
 	Mem          string                  `json:"mem"`
 	Cpu          string                  `json:"cpu"`
 	Ports        []uint16                `json:"ports"`
+	tempPorts    []uint16                `json:"-"`
+}
+
+func (i *Instance) setUsedPort(port uint16) {
+	rw.Lock()
+	defer rw.Unlock()
+
+	for _, p := range i.tempPorts {
+		if p == port {
+			return
+		}
+	}
+	i.tempPorts = append(i.tempPorts, port)
 }
 
 func (i *Instance) IsConnected() bool {

services/session.go

@@ -94,6 +94,12 @@ func (s *Session) SchedulePeriodicTasks() {
 				}()
 			}
 			wg.Wait()
+			// broadcast all information
+			for _, ins := range s.Instances {
+				ins.Ports = ins.tempPorts
+				ins.tempPorts = []uint16{}
+				wsServer.BroadcastTo(ins.session.Id, "instance stats", ins.Name, ins.Mem, ins.Cpu, ins.IsManager, ins.Ports)
+			}
 		}
 	}()
 }
@@ -123,7 +129,9 @@ func CloseSession(s *Session) error {
 	s.rw.Lock()
 	defer s.rw.Unlock()
 
-	s.ticker.Stop()
+	if s.ticker != nil {
+		s.ticker.Stop()
+	}
 	wsServer.BroadcastTo(s.Id, "session end")
 	log.Printf("Starting clean up of session [%s]\n", s.Id)
 	for _, i := range s.Instances {
@@ -238,6 +246,13 @@ func LoadSessionsFromDisk() error {
 
 			}
 
+			// Connect PWD daemon to the new network
+			if err := ConnectNetwork("pwd", s.Id); err != nil {
+				log.Println("ERROR NETWORKING")
+				return err
+			}
+			log.Printf("Connected pwd to network [%s]\n", s.Id)
+
 			// Schedule peridic tasks execution
 			s.SchedulePeriodicTasks()
 		}

services/task.go

@@ -7,5 +7,5 @@ type periodicTask interface {
 var periodicTasks []periodicTask
 
 func init() {
-	periodicTasks = append(periodicTasks, &collectStatsTask{}, &checkSwarmStatusTask{}, &checkUsedPortsTask{}, &broadcastInfoTask{})
+	periodicTasks = append(periodicTasks, &collectStatsTask{}, &checkSwarmStatusTask{}, &checkUsedPortsTask{}, &checkSwarmUsedPortsTask{})
 }