move discovery out of the cluster interface

Signed-off-by: Victor Vieux <vieux@docker.com>

cluster/cluster.go

@@ -1,9 +1,6 @@
 package cluster
 
-import (
-	"github.com/docker/swarm/discovery"
-	"github.com/samalba/dockerclient"
-)
+import "github.com/samalba/dockerclient"
 
 type Cluster interface {
 	CreateContainer(config *dockerclient.ContainerConfig, name string) (*Container, error)
@@ -13,5 +10,4 @@ type Cluster interface {
 	Nodes() []*Node
 	Containers() []*Container
 	Container(IdOrName string) *Container
-	NewEntries(entries []*discovery.Entry)
 }

cluster/mesos/mesos.go

@@ -6,7 +6,6 @@ import (
 
 	log "github.com/Sirupsen/logrus"
 	"github.com/docker/swarm/cluster"
-	"github.com/docker/swarm/discovery"
 	"github.com/samalba/dockerclient"
 )
 
@@ -23,6 +22,9 @@ type MesosCluster struct {
 
 func NewCluster(options *cluster.Options) cluster.Cluster {
 	log.WithFields(log.Fields{"name": "mesos"}).Debug("Initializing cluster")
+
+	//TODO: get the list of mesos masters using options.Discovery (zk://<ip1>,<ip2>,<ip3>/mesos)
+
 	return &MesosCluster{
 		nodes:   cluster.NewNodes(),
 		options: options,
@@ -57,19 +59,6 @@ func (s *MesosCluster) RemoveContainer(container *cluster.Container, force bool)
 	return ErrNotImplemented
 }
 
-// Entries are Mesos masters
-func (s *MesosCluster) NewEntries(entries []*discovery.Entry) {
-
-	//TODO: get list of actual docker nodes from mesos masters
-	//  -   cluster.NewNode(m.String(), s.options.OvercommitRatio)
-
-	//TODO: create direct connection to those nodes
-	//  -   n.Connect(s.options.TLSConfig)
-
-	//TODO: add them to the cluster
-	//  -   s.nodes.Add(n)
-}
-
 func (s *MesosCluster) Events(eventsHandler cluster.EventHandler) {
 	s.nodes.Events(eventsHandler)
 }

cluster/options.go

@@ -5,4 +5,6 @@ import "crypto/tls"
 type Options struct {
 	TLSConfig       *tls.Config
 	OvercommitRatio float64
+	Discovery       string
+	Heartbeat       int
 }

cluster/swarm/swarm.go

@@ -22,12 +22,32 @@ type SwarmCluster struct {
 
 func NewCluster(scheduler *scheduler.Scheduler, store *state.Store, options *cluster.Options) cluster.Cluster {
 	log.WithFields(log.Fields{"name": "swarm"}).Debug("Initializing cluster")
-	return &SwarmCluster{
+
+	cluster := &SwarmCluster{
 		nodes:     cluster.NewNodes(),
 		scheduler: scheduler,
 		options:   options,
 		store:     store,
 	}
+
+	// get the list of entries from the discovery service
+	go func() {
+		d, err := discovery.New(options.Discovery, options.Heartbeat)
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		entries, err := d.Fetch()
+		if err != nil {
+			log.Fatal(err)
+
+		}
+		cluster.newEntries(entries)
+
+		go d.Watch(cluster.newEntries)
+	}()
+
+	return cluster
 }
 
 // Schedule a brand new container into the cluster.
@@ -75,7 +95,7 @@ func (s *SwarmCluster) RemoveContainer(container *cluster.Container, force bool)
 }
 
 // Entries are Docker Nodes
-func (s *SwarmCluster) NewEntries(entries []*discovery.Entry) {
+func (s *SwarmCluster) newEntries(entries []*discovery.Entry) {
 	for _, entry := range entries {
 		go func(m *discovery.Entry) {
 			if s.nodes.Get(m.String()) == nil {

manage.go

@@ -13,7 +13,6 @@ import (
 	"github.com/docker/swarm/cluster"
 	"github.com/docker/swarm/cluster/mesos"
 	"github.com/docker/swarm/cluster/swarm"
-	"github.com/docker/swarm/discovery"
 	"github.com/docker/swarm/scheduler"
 	"github.com/docker/swarm/scheduler/filter"
 	"github.com/docker/swarm/scheduler/strategy"
@@ -124,6 +123,8 @@ func manage(c *cli.Context) {
 	options := &cluster.Options{
 		TLSConfig:       tlsConfig,
 		OvercommitRatio: c.Float64("overcommit"),
+		Discovery:       dflag,
+		Heartbeat:       c.Int("heartbeat"),
 	}
 
 	var cluster cluster.Cluster
@@ -137,23 +138,6 @@ func manage(c *cli.Context) {
 		log.Fatalf("cluster %q not supported", c.String("cluster"))
 	}
 
-	// get the list of entries from the discovery service
-	go func() {
-		d, err := discovery.New(dflag, c.Int("heartbeat"))
-		if err != nil {
-			log.Fatal(err)
-		}
-
-		entries, err := d.Fetch()
-		if err != nil {
-			log.Fatal(err)
-
-		}
-		cluster.NewEntries(entries)
-
-		go d.Watch(cluster.NewEntries)
-	}()
-
 	// see https://github.com/codegangsta/cli/issues/160
 	hosts := c.StringSlice("host")
 	if c.IsSet("host") || c.IsSet("H") {