added cloud provider flag to kubelet

This is to fix issue #5667

cmd/integration/integration.go

@@ -227,14 +227,14 @@ func startComponents(firstManifestURL, secondManifestURL, apiVersion string) (st
 	testRootDir := makeTempDirOrDie("kubelet_integ_1.", "")
 	configFilePath := makeTempDirOrDie("config", testRootDir)
 	glog.Infof("Using %s as root dir for kubelet #1", testRootDir)
-	kcfg := kubeletapp.SimpleKubelet(cl, &fakeDocker1, machineList[0], testRootDir, firstManifestURL, "127.0.0.1", 10250, api.NamespaceDefault, empty_dir.ProbeVolumePlugins(), nil, cadvisorInterface, configFilePath)
+	kcfg := kubeletapp.SimpleKubelet(cl, &fakeDocker1, machineList[0], testRootDir, firstManifestURL, "127.0.0.1", 10250, api.NamespaceDefault, empty_dir.ProbeVolumePlugins(), nil, cadvisorInterface, configFilePath, nil)
 	kubeletapp.RunKubelet(kcfg)
 	// Kubelet (machine)
 	// Create a second kubelet so that the guestbook example's two redis slaves both
 	// have a place they can schedule.
 	testRootDir = makeTempDirOrDie("kubelet_integ_2.", "")
 	glog.Infof("Using %s as root dir for kubelet #2", testRootDir)
-	kcfg = kubeletapp.SimpleKubelet(cl, &fakeDocker2, machineList[1], testRootDir, secondManifestURL, "127.0.0.1", 10251, api.NamespaceDefault, empty_dir.ProbeVolumePlugins(), nil, cadvisorInterface, "")
+	kcfg = kubeletapp.SimpleKubelet(cl, &fakeDocker2, machineList[1], testRootDir, secondManifestURL, "127.0.0.1", 10251, api.NamespaceDefault, empty_dir.ProbeVolumePlugins(), nil, cadvisorInterface, "", nil)
 	kubeletapp.RunKubelet(kcfg)
 	return apiServer.URL, configFilePath
 }

cmd/kubelet/app/plugins.go

@@ -31,6 +31,13 @@ import (
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/volume/host_path"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/volume/nfs"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/volume/secret"
+	//Cloud providers
+	_ "github.com/GoogleCloudPlatform/kubernetes/pkg/cloudprovider/aws"
+	_ "github.com/GoogleCloudPlatform/kubernetes/pkg/cloudprovider/gce"
+	_ "github.com/GoogleCloudPlatform/kubernetes/pkg/cloudprovider/openstack"
+	_ "github.com/GoogleCloudPlatform/kubernetes/pkg/cloudprovider/ovirt"
+	_ "github.com/GoogleCloudPlatform/kubernetes/pkg/cloudprovider/rackspace"
+	_ "github.com/GoogleCloudPlatform/kubernetes/pkg/cloudprovider/vagrant"
 )
 
 // ProbeVolumePlugins collects all volume plugins into an easy to use list.

cmd/kubelet/app/server.go

@@ -38,6 +38,7 @@ import (
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/volume"
 
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/cloudprovider"
 	"github.com/golang/glog"
 	"github.com/spf13/pflag"
 )
@@ -79,6 +80,8 @@ type KubeletServer struct {
 	ImageGCHighThresholdPercent    int
 	ImageGCLowThresholdPercent     int
 	NetworkPluginName              string
+	CloudProvider                  string
+	CloudConfigFile                string
 }
 
 // NewKubeletServer will create a new KubeletServer with default values.
@@ -140,6 +143,8 @@ func (s *KubeletServer) AddFlags(fs *pflag.FlagSet) {
 	fs.IntVar(&s.ImageGCHighThresholdPercent, "image_gc_high_threshold", s.ImageGCHighThresholdPercent, "The percent of disk usage after which image garbage collection is always run. Default: 90%%")
 	fs.IntVar(&s.ImageGCLowThresholdPercent, "image_gc_low_threshold", s.ImageGCLowThresholdPercent, "The percent of disk usage before which image garbage collection is never run. Lowest disk usage to garbage collect to. Default: 80%%")
 	fs.StringVar(&s.NetworkPluginName, "network_plugin", s.NetworkPluginName, "<Warning: Alpha feature> The name of the network plugin to be invoked for various events in kubelet/pod lifecycle")
+	fs.StringVar(&s.CloudProvider, "cloud_provider", s.CloudProvider, "The provider for cloud services.  Empty string for no provider.")
+	fs.StringVar(&s.CloudConfigFile, "cloud_config", s.CloudConfigFile, "The path to the cloud provider configuration file.  Empty string for no configuration file.")
 }
 
 // Run runs the specified KubeletServer.  This should never exit.
@@ -169,6 +174,10 @@ func (s *KubeletServer) Run(_ []string) error {
 		HighThresholdPercent: s.ImageGCHighThresholdPercent,
 		LowThresholdPercent:  s.ImageGCLowThresholdPercent,
 	}
+
+	cloud := cloudprovider.InitCloudProvider(s.CloudProvider, s.CloudConfigFile)
+	glog.Infof("Successfully initialized cloud provider: %q from the config file: %q\n", s.CloudProvider, s.CloudConfigFile)
+
 	kcfg := KubeletConfig{
 		Address:                        s.Address,
 		AllowPrivileged:                s.AllowPrivileged,
@@ -200,6 +209,7 @@ func (s *KubeletServer) Run(_ []string) error {
 		NetworkPluginName:              s.NetworkPluginName,
 		StreamingConnectionIdleTimeout: s.StreamingConnectionIdleTimeout,
 		ImageGCPolicy:                  imageGCPolicy,
+		Cloud:                          cloud,
 	}
 
 	RunKubelet(&kcfg)
@@ -262,7 +272,8 @@ func SimpleKubelet(client *client.Client,
 	volumePlugins []volume.VolumePlugin,
 	tlsOptions *kubelet.TLSOptions,
 	cadvisorInterface cadvisor.Interface,
-	configFilePath string) *KubeletConfig {
+	configFilePath string,
+	cloud cloudprovider.Interface) *KubeletConfig {
 
 	imageGCPolicy := kubelet.ImageGCPolicy{
 		HighThresholdPercent: 90,
@@ -291,6 +302,7 @@ func SimpleKubelet(client *client.Client,
 		CadvisorInterface:       cadvisorInterface,
 		ConfigFile:              configFilePath,
 		ImageGCPolicy:           imageGCPolicy,
+		Cloud:                   cloud,
 	}
 	return &kcfg
 }
@@ -399,6 +411,7 @@ type KubeletConfig struct {
 	Recorder                       record.EventRecorder
 	TLSOptions                     *kubelet.TLSOptions
 	ImageGCPolicy                  kubelet.ImageGCPolicy
+	Cloud                          cloudprovider.Interface
 }
 
 func createAndInitKubelet(kc *KubeletConfig, pc *config.PodConfig) (*kubelet.Kubelet, error) {
@@ -440,7 +453,8 @@ func createAndInitKubelet(kc *KubeletConfig, pc *config.PodConfig) (*kubelet.Kub
 		kc.StreamingConnectionIdleTimeout,
 		kc.Recorder,
 		kc.CadvisorInterface,
-		kc.ImageGCPolicy)
+		kc.ImageGCPolicy,
+		kc.Cloud)
 
 	if err != nil {
 		return nil, err

cmd/kubernetes/kubernetes.go

@@ -150,8 +150,9 @@ func startComponents(etcdClient tools.EtcdClient, cl *client.Client, addr net.IP
 	if err != nil {
 		glog.Fatalf("Failed to create cAdvisor: %v", err)
 	}
-	kcfg := kubeletapp.SimpleKubelet(cl, dockerClient, machineList[0], "/tmp/kubernetes", "", "127.0.0.1", 10250, *masterServiceNamespace, kubeletapp.ProbeVolumePlugins(), nil, cadvisorInterface, "")
+	kcfg := kubeletapp.SimpleKubelet(cl, dockerClient, machineList[0], "/tmp/kubernetes", "", "127.0.0.1", 10250, *masterServiceNamespace, kubeletapp.ProbeVolumePlugins(), nil, cadvisorInterface, "", nil)
 	kubeletapp.RunKubelet(kcfg)
+
 }
 
 func newApiClient(addr net.IP, port int) *client.Client {

pkg/kubelet/kubelet.go

@@ -37,6 +37,7 @@ import (
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/client/cache"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/client/record"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/cloudprovider"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/fields"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/cadvisor"
 	kubecontainer "github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/container"
@@ -137,7 +138,8 @@ func NewMainKubelet(
 	streamingConnectionIdleTimeout time.Duration,
 	recorder record.EventRecorder,
 	cadvisorInterface cadvisor.Interface,
-	imageGCPolicy ImageGCPolicy) (*Kubelet, error) {
+	imageGCPolicy ImageGCPolicy,
+	cloud cloudprovider.Interface) (*Kubelet, error) {
 	if rootDirectory == "" {
 		return nil, fmt.Errorf("invalid root directory %q", rootDirectory)
 	}
@@ -235,6 +237,7 @@ func NewMainKubelet(
 		containerGC:                    containerGC,
 		imageManager:                   imageManager,
 		statusManager:                  statusManager,
+		cloud:                          cloud,
 	}
 
 	klet.podManager = newBasicPodManager(klet.kubeClient)
@@ -351,6 +354,9 @@ type Kubelet struct {
 
 	// Syncs pods statuses with apiserver; also used as a cache of statuses.
 	statusManager *statusManager
+
+	//Cloud provider interface
+	cloud cloudprovider.Interface
 }
 
 // getRootDir returns the full path to the directory under which kubelet can