Make PortalIP alloc HA

* Add an allocator which saves state in etcd
* Perform PortalIP allocation check on startup and periodically afterwards

Also expose methods in master for downstream components to handle IP allocation
/ master registration themselves.

cmd/integration/integration.go

@@ -185,17 +185,18 @@ func startComponents(firstManifestURL, secondManifestURL, apiVersion string) (st
 
 	// Create a master and install handlers into mux.
 	m := master.New(&master.Config{
-		EtcdHelper:        helper,
-		KubeletClient:     fakeKubeletClient{},
-		EnableLogsSupport: false,
-		EnableProfiling:   true,
-		APIPrefix:         "/api",
-		Authorizer:        apiserver.NewAlwaysAllowAuthorizer(),
-		AdmissionControl:  admit.NewAlwaysAdmit(),
-		ReadWritePort:     portNumber,
-		ReadOnlyPort:      portNumber,
-		PublicAddress:     publicAddress,
-		CacheTimeout:      2 * time.Second,
+		EtcdHelper:            helper,
+		KubeletClient:         fakeKubeletClient{},
+		EnableCoreControllers: true,
+		EnableLogsSupport:     false,
+		EnableProfiling:       true,
+		APIPrefix:             "/api",
+		Authorizer:            apiserver.NewAlwaysAllowAuthorizer(),
+		AdmissionControl:      admit.NewAlwaysAdmit(),
+		ReadWritePort:         portNumber,
+		ReadOnlyPort:          portNumber,
+		PublicAddress:         publicAddress,
+		CacheTimeout:          2 * time.Second,
 	})
 	handler.delegate = m.Handler
 

cmd/kube-apiserver/app/server.go

@@ -309,6 +309,7 @@ func (s *APIServer) Run(_ []string) error {
 		EventTTL:               s.EventTTL,
 		KubeletClient:          kubeletClient,
 		PortalNet:              &n,
+		EnableCoreControllers:  true,
 		EnableLogsSupport:      s.EnableLogsSupport,
 		EnableUISupport:        true,
 		EnableSwaggerSupport:   true,

cmd/kubernetes/kubernetes.go

@@ -94,11 +94,12 @@ func runApiServer(etcdClient tools.EtcdClient, addr net.IP, port int, masterServ
 			Client: http.DefaultClient,
 			Port:   10250,
 		},
-		EnableLogsSupport:    false,
-		EnableSwaggerSupport: true,
-		EnableProfiling:      *enableProfiling,
-		APIPrefix:            "/api",
-		Authorizer:           apiserver.NewAlwaysAllowAuthorizer(),
+		EnableCoreControllers: true,
+		EnableLogsSupport:     false,
+		EnableSwaggerSupport:  true,
+		EnableProfiling:       *enableProfiling,
+		APIPrefix:             "/api",
+		Authorizer:            apiserver.NewAlwaysAllowAuthorizer(),
 
 		ReadWritePort:          port,
 		ReadOnlyPort:           port,