Treat async loops the same.

In the name of consistency, treat the PodCache loop the same as the
EndpointController.

pkg/master/master.go

@@ -105,8 +105,8 @@ func makeMinionRegistry(c *Config) minion.Registry {
 }
 
 func (m *Master) init(cloud cloudprovider.Interface, podInfoGetter client.PodInfoGetter) {
-	podCache := NewPodCache(podInfoGetter, m.podRegistry, time.Second*30)
+	podCache := NewPodCache(podInfoGetter, m.podRegistry)
-	go podCache.Loop()
+	go util.Forever(func() { podCache.UpdateAllContainers() }, time.Second*30)
 
 	endpoints := endpoint.NewEndpointController(m.serviceRegistry, m.client)
 	go util.Forever(func() { endpoints.SyncServiceEndpoints() }, time.Second*10)

pkg/master/pod_cache.go

@@ -18,13 +18,11 @@ package master
 
 import (
 	"sync"
-	"time"
 
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/registry/pod"
-	"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
 
 	"github.com/golang/glog"
 )
@@ -36,17 +34,15 @@ type PodCache struct {
 	pods          pod.Registry
 	// This is a map of pod id to a map of container name to the
 	podInfo map[string]api.PodInfo
-	period  time.Duration
 	podLock sync.Mutex
 }
 
 // NewPodCache returns a new PodCache which watches container information registered in the given PodRegistry.
-func NewPodCache(info client.PodInfoGetter, pods pod.Registry, period time.Duration) *PodCache {
+func NewPodCache(info client.PodInfoGetter, pods pod.Registry) *PodCache {
 	return &PodCache{
 		containerInfo: info,
 		pods:          pods,
 		podInfo:       map[string]api.PodInfo{},
-		period:        period,
 	}
 }
 
@@ -87,9 +83,3 @@ func (p *PodCache) UpdateAllContainers() {
 		}
 	}
 }
-
-// Loop begins watching updates of container information.
-// It runs forever, and is expected to be placed in a go routine.
-func (p *PodCache) Loop() {
-	util.Forever(func() { p.UpdateAllContainers() }, p.period)
-}

pkg/master/pod_cache_test.go

@@ -19,7 +19,6 @@ package master
 import (
 	"reflect"
 	"testing"
-	"time"
 
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/registry/registrytest"
@@ -40,7 +39,7 @@ func (f *FakePodInfoGetter) GetPodInfo(host, id string) (api.PodInfo, error) {
 }
 
 func TestPodCacheGet(t *testing.T) {
-	cache := NewPodCache(nil, nil, time.Second*1)
+	cache := NewPodCache(nil, nil)
 
 	expected := api.PodInfo{"foo": docker.Container{ID: "foo"}}
 	cache.podInfo["foo"] = expected
@@ -55,7 +54,7 @@ func TestPodCacheGet(t *testing.T) {
 }
 
 func TestPodCacheGetMissing(t *testing.T) {
-	cache := NewPodCache(nil, nil, time.Second*1)
+	cache := NewPodCache(nil, nil)
 
 	info, err := cache.GetPodInfo("host", "foo")
 	if err == nil {
@@ -71,7 +70,7 @@ func TestPodGetPodInfoGetter(t *testing.T) {
 	fake := FakePodInfoGetter{
 		data: expected,
 	}
-	cache := NewPodCache(&fake, nil, time.Second*1)
+	cache := NewPodCache(&fake, nil)
 
 	cache.updatePodInfo("host", "foo")
 
@@ -103,7 +102,7 @@ func TestPodUpdateAllContainers(t *testing.T) {
 	fake := FakePodInfoGetter{
 		data: expected,
 	}
-	cache := NewPodCache(&fake, mockRegistry, time.Second*1)
+	cache := NewPodCache(&fake, mockRegistry)
 
 	cache.UpdateAllContainers()