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master.go
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master.go
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package kubernetes
import (
"fmt"
"io/ioutil"
"net"
"os"
"github.com/emicklei/go-restful"
"github.com/golang/glog"
kctrlmgr "k8s.io/kubernetes/cmd/kube-controller-manager/app"
kapi "k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/unversioned"
"k8s.io/kubernetes/pkg/api/v1"
extv1beta1 "k8s.io/kubernetes/pkg/apis/extensions/v1beta1"
"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
"k8s.io/kubernetes/pkg/client/record"
"k8s.io/kubernetes/pkg/client/typed/dynamic"
coreunversioned "k8s.io/kubernetes/pkg/client/typed/generated/core/unversioned"
extensionsunversioned "k8s.io/kubernetes/pkg/client/typed/generated/extensions/unversioned"
client "k8s.io/kubernetes/pkg/client/unversioned"
"k8s.io/kubernetes/pkg/controller"
"k8s.io/kubernetes/pkg/controller/daemon"
endpointcontroller "k8s.io/kubernetes/pkg/controller/endpoint"
gccontroller "k8s.io/kubernetes/pkg/controller/gc"
jobcontroller "k8s.io/kubernetes/pkg/controller/job"
namespacecontroller "k8s.io/kubernetes/pkg/controller/namespace"
nodecontroller "k8s.io/kubernetes/pkg/controller/node"
volumeclaimbinder "k8s.io/kubernetes/pkg/controller/persistentvolume"
podautoscalercontroller "k8s.io/kubernetes/pkg/controller/podautoscaler"
"k8s.io/kubernetes/pkg/controller/podautoscaler/metrics"
replicationcontroller "k8s.io/kubernetes/pkg/controller/replication"
kresourcequota "k8s.io/kubernetes/pkg/controller/resourcequota"
"k8s.io/kubernetes/pkg/master"
quotainstall "k8s.io/kubernetes/pkg/quota/install"
"k8s.io/kubernetes/pkg/runtime"
"k8s.io/kubernetes/pkg/util"
"k8s.io/kubernetes/pkg/util/io"
utilwait "k8s.io/kubernetes/pkg/util/wait"
"k8s.io/kubernetes/pkg/volume"
"k8s.io/kubernetes/pkg/volume/aws_ebs"
"k8s.io/kubernetes/pkg/volume/cinder"
"k8s.io/kubernetes/pkg/volume/gce_pd"
"k8s.io/kubernetes/pkg/volume/host_path"
"k8s.io/kubernetes/pkg/volume/nfs"
"k8s.io/kubernetes/plugin/pkg/scheduler"
_ "k8s.io/kubernetes/plugin/pkg/scheduler/algorithmprovider"
schedulerapi "k8s.io/kubernetes/plugin/pkg/scheduler/api"
latestschedulerapi "k8s.io/kubernetes/plugin/pkg/scheduler/api/latest"
"k8s.io/kubernetes/plugin/pkg/scheduler/factory"
osclient "github.com/openshift/origin/pkg/client"
configapi "github.com/openshift/origin/pkg/cmd/server/api"
)
const (
KubeAPIPrefix = "/api"
KubeAPIPrefixV1 = KubeAPIPrefix + "/v1"
KubeAPIGroupPrefix = "/apis"
KubeAPIExtensionsPrefixV1beta1 = KubeAPIGroupPrefix + "/extensions/v1beta1"
)
// InstallAPI starts a Kubernetes master and registers the supported REST APIs
// into the provided mux, then returns an array of strings indicating what
// endpoints were started (these are format strings that will expect to be sent
// a single string value).
func (c *MasterConfig) InstallAPI(container *restful.Container) ([]string, error) {
c.Master.RestfulContainer = container
_, err := master.New(c.Master)
if err != nil {
return nil, err
}
messages := []string{}
if configapi.HasKubernetesAPIVersion(c.Options, v1.SchemeGroupVersion) {
messages = append(messages, fmt.Sprintf("Started Kubernetes API at %%s%s", KubeAPIPrefixV1))
}
if configapi.HasKubernetesAPIVersion(c.Options, extv1beta1.SchemeGroupVersion) {
messages = append(messages, fmt.Sprintf("Started Kubernetes API Extensions at %%s%s", KubeAPIExtensionsPrefixV1beta1))
}
return messages, nil
}
// RunNamespaceController starts the Kubernetes Namespace Manager
func (c *MasterConfig) RunNamespaceController(kubeClient internalclientset.Interface, clientPool dynamic.ClientPool) {
// Find the list of namespaced resources via discovery that the namespace controller must manage
groupVersionResources, err := namespacecontroller.ServerPreferredNamespacedGroupVersionResources(kubeClient.Discovery())
if err != nil {
glog.Fatalf("Failed to get supported resources from server: %v", err)
}
namespaceController := namespacecontroller.NewNamespaceController(kubeClient, clientPool, groupVersionResources, c.ControllerManager.NamespaceSyncPeriod.Duration, kapi.FinalizerKubernetes)
go namespaceController.Run(c.ControllerManager.ConcurrentNamespaceSyncs, utilwait.NeverStop)
}
// RunPersistentVolumeClaimBinder starts the Kubernetes Persistent Volume Claim Binder
func (c *MasterConfig) RunPersistentVolumeClaimBinder(client *client.Client) {
binder := volumeclaimbinder.NewPersistentVolumeClaimBinder(internalclientset.FromUnversionedClient(client), c.ControllerManager.PVClaimBinderSyncPeriod.Duration)
binder.Run()
}
func (c *MasterConfig) RunPersistentVolumeProvisioner(client *client.Client) {
provisioner, err := kctrlmgr.NewVolumeProvisioner(c.CloudProvider, c.ControllerManager.VolumeConfiguration)
if err != nil {
// a provisioner was expected but encountered an error
glog.Fatal(err)
}
// not all cloud providers have a provisioner.
if provisioner != nil {
allPlugins := []volume.VolumePlugin{}
allPlugins = append(allPlugins, aws_ebs.ProbeVolumePlugins()...)
allPlugins = append(allPlugins, gce_pd.ProbeVolumePlugins()...)
allPlugins = append(allPlugins, cinder.ProbeVolumePlugins()...)
controllerClient := volumeclaimbinder.NewControllerClient(internalclientset.FromUnversionedClient(client))
provisionerController, err := volumeclaimbinder.NewPersistentVolumeProvisionerController(
controllerClient,
c.ControllerManager.PVClaimBinderSyncPeriod.Duration,
c.ControllerManager.ClusterName,
allPlugins,
provisioner,
c.CloudProvider,
)
if err != nil {
glog.Fatalf("Could not start Persistent Volume Provisioner: %+v", err)
}
provisionerController.Run()
}
}
func (c *MasterConfig) RunPersistentVolumeClaimRecycler(recyclerImageName string, client *client.Client, namespace string) {
uid := int64(0)
defaultScrubPod := volume.NewPersistentVolumeRecyclerPodTemplate()
defaultScrubPod.Namespace = namespace
defaultScrubPod.Spec.Containers[0].Image = recyclerImageName
defaultScrubPod.Spec.Containers[0].Command = []string{"/usr/bin/recycle"}
defaultScrubPod.Spec.Containers[0].Args = []string{"/scrub"}
defaultScrubPod.Spec.Containers[0].SecurityContext = &kapi.SecurityContext{RunAsUser: &uid}
defaultScrubPod.Spec.Containers[0].ImagePullPolicy = kapi.PullIfNotPresent
volumeConfig := c.ControllerManager.VolumeConfiguration
hostPathConfig := volume.VolumeConfig{
RecyclerMinimumTimeout: volumeConfig.PersistentVolumeRecyclerConfiguration.MinimumTimeoutHostPath,
RecyclerTimeoutIncrement: volumeConfig.PersistentVolumeRecyclerConfiguration.IncrementTimeoutHostPath,
RecyclerPodTemplate: defaultScrubPod,
}
if len(volumeConfig.PersistentVolumeRecyclerConfiguration.PodTemplateFilePathHostPath) != 0 {
if err := attemptToLoadRecycler(volumeConfig.PersistentVolumeRecyclerConfiguration.PodTemplateFilePathHostPath, &hostPathConfig); err != nil {
glog.Fatalf("Could not create hostpath recycler pod from file %s: %+v", volumeConfig.PersistentVolumeRecyclerConfiguration.PodTemplateFilePathHostPath, err)
}
}
nfsConfig := volume.VolumeConfig{
RecyclerMinimumTimeout: volumeConfig.PersistentVolumeRecyclerConfiguration.MinimumTimeoutNFS,
RecyclerTimeoutIncrement: volumeConfig.PersistentVolumeRecyclerConfiguration.IncrementTimeoutNFS,
RecyclerPodTemplate: defaultScrubPod,
}
if len(volumeConfig.PersistentVolumeRecyclerConfiguration.PodTemplateFilePathNFS) != 0 {
if err := attemptToLoadRecycler(volumeConfig.PersistentVolumeRecyclerConfiguration.PodTemplateFilePathNFS, &nfsConfig); err != nil {
glog.Fatalf("Could not create NFS recycler pod from file %s: %+v", volumeConfig.PersistentVolumeRecyclerConfiguration.PodTemplateFilePathNFS, err)
}
}
allPlugins := []volume.VolumePlugin{}
allPlugins = append(allPlugins, host_path.ProbeVolumePlugins(hostPathConfig)...)
allPlugins = append(allPlugins, nfs.ProbeVolumePlugins(nfsConfig)...)
// dynamic provisioning allows deletion of volumes as a recycling operation after a claim is deleted
allPlugins = append(allPlugins, aws_ebs.ProbeVolumePlugins()...)
allPlugins = append(allPlugins, gce_pd.ProbeVolumePlugins()...)
allPlugins = append(allPlugins, cinder.ProbeVolumePlugins()...)
recycler, err := volumeclaimbinder.NewPersistentVolumeRecycler(
internalclientset.FromUnversionedClient(client),
c.ControllerManager.PVClaimBinderSyncPeriod.Duration,
volumeConfig.PersistentVolumeRecyclerConfiguration.MaximumRetry,
allPlugins,
c.CloudProvider,
)
if err != nil {
glog.Fatalf("Could not start Persistent Volume Recycler: %+v", err)
}
recycler.Run()
}
// attemptToLoadRecycler tries decoding a pod from a filepath for use as a recycler for a volume.
// If a path is not set as a CLI flag, no load will be attempted and no error returned.
// If a path is set and the pod was successfully loaded, the recycler pod will be set on the config and no error returned.
// Any failed attempt to load the recycler pod will return an error.
// TODO: make this func re-usable upstream and use downstream. No need to duplicate this function.
func attemptToLoadRecycler(path string, config *volume.VolumeConfig) error {
glog.V(5).Infof("Attempting to load recycler pod file from %s", path)
recyclerPod, err := io.LoadPodFromFile(path)
if err != nil {
return err
}
if len(recyclerPod.Spec.Volumes) != 1 {
return fmt.Errorf("Recycler pod is expected to have exactly 1 volume to scrub, but found %d", len(recyclerPod.Spec.Volumes))
}
config.RecyclerPodTemplate = recyclerPod
glog.V(5).Infof("Recycler set to %s/%s", config.RecyclerPodTemplate.Namespace, config.RecyclerPodTemplate.Name)
return nil
}
// RunReplicationController starts the Kubernetes replication controller sync loop
func (c *MasterConfig) RunReplicationController(client *client.Client) {
controllerManager := replicationcontroller.NewReplicationManager(
internalclientset.FromUnversionedClient(client),
kctrlmgr.ResyncPeriod(c.ControllerManager),
replicationcontroller.BurstReplicas,
c.ControllerManager.LookupCacheSizeForRC,
)
go controllerManager.Run(c.ControllerManager.ConcurrentRCSyncs, utilwait.NeverStop)
}
// RunJobController starts the Kubernetes job controller sync loop
func (c *MasterConfig) RunJobController(client *client.Client) {
controller := jobcontroller.NewJobController(internalclientset.FromUnversionedClient(client), kctrlmgr.ResyncPeriod(c.ControllerManager))
go controller.Run(c.ControllerManager.ConcurrentJobSyncs, utilwait.NeverStop)
}
// RunHPAController starts the Kubernetes hpa controller sync loop
func (c *MasterConfig) RunHPAController(oc *osclient.Client, kc *client.Client, heapsterNamespace string) {
clientsetClient := internalclientset.FromUnversionedClient(kc)
delegatingScaleNamespacer := osclient.NewDelegatingScaleNamespacer(oc, kc)
podautoscaler := podautoscalercontroller.NewHorizontalController(
coreunversioned.EventsGetter(clientsetClient),
extensionsunversioned.ScalesGetter(delegatingScaleNamespacer),
extensionsunversioned.HorizontalPodAutoscalersGetter(clientsetClient),
metrics.NewHeapsterMetricsClient(clientsetClient, heapsterNamespace, "https", "heapster", ""),
c.ControllerManager.HorizontalPodAutoscalerSyncPeriod.Duration,
)
go podautoscaler.Run(utilwait.NeverStop)
}
func (c *MasterConfig) RunDaemonSetsController(client *client.Client) {
controller := daemon.NewDaemonSetsController(
internalclientset.FromUnversionedClient(client),
kctrlmgr.ResyncPeriod(c.ControllerManager),
c.ControllerManager.LookupCacheSizeForDaemonSet,
)
go controller.Run(c.ControllerManager.ConcurrentDaemonSetSyncs, utilwait.NeverStop)
}
// RunEndpointController starts the Kubernetes replication controller sync loop
func (c *MasterConfig) RunEndpointController() {
endpoints := endpointcontroller.NewEndpointController(internalclientset.FromUnversionedClient(c.KubeClient), kctrlmgr.ResyncPeriod(c.ControllerManager))
go endpoints.Run(c.ControllerManager.ConcurrentEndpointSyncs, utilwait.NeverStop)
}
// RunScheduler starts the Kubernetes scheduler
func (c *MasterConfig) RunScheduler() {
config, err := c.createSchedulerConfig()
if err != nil {
glog.Fatalf("Unable to start scheduler: %v", err)
}
eventcast := record.NewBroadcaster()
config.Recorder = eventcast.NewRecorder(kapi.EventSource{Component: kapi.DefaultSchedulerName})
eventcast.StartRecordingToSink(c.KubeClient.Events(""))
s := scheduler.New(config)
s.Run()
}
// RunResourceQuotaManager starts the resource quota manager
func (c *MasterConfig) RunResourceQuotaManager() {
client := internalclientset.FromUnversionedClient(c.KubeClient)
resourceQuotaRegistry := quotainstall.NewRegistry(client)
groupKindsToReplenish := []unversioned.GroupKind{
kapi.Kind("Pod"),
kapi.Kind("Service"),
kapi.Kind("ReplicationController"),
kapi.Kind("PersistentVolumeClaim"),
kapi.Kind("Secret"),
kapi.Kind("ConfigMap"),
}
resourceQuotaControllerOptions := &kresourcequota.ResourceQuotaControllerOptions{
KubeClient: client,
ResyncPeriod: controller.StaticResyncPeriodFunc(c.ControllerManager.ResourceQuotaSyncPeriod.Duration),
Registry: resourceQuotaRegistry,
GroupKindsToReplenish: groupKindsToReplenish,
ControllerFactory: kresourcequota.NewReplenishmentControllerFactory(client),
ReplenishmentResyncPeriod: kctrlmgr.ResyncPeriod(c.ControllerManager),
}
go kresourcequota.NewResourceQuotaController(resourceQuotaControllerOptions).Run(c.ControllerManager.ConcurrentResourceQuotaSyncs, utilwait.NeverStop)
}
func (c *MasterConfig) RunGCController(client *client.Client) {
if c.ControllerManager.TerminatedPodGCThreshold > 0 {
gcController := gccontroller.New(internalclientset.FromUnversionedClient(client), kctrlmgr.ResyncPeriod(c.ControllerManager), c.ControllerManager.TerminatedPodGCThreshold)
go gcController.Run(utilwait.NeverStop)
}
}
// RunNodeController starts the node controller
func (c *MasterConfig) RunNodeController() {
s := c.ControllerManager
// this cidr has been validated already
_, clusterCIDR, _ := net.ParseCIDR(s.ClusterCIDR)
controller := nodecontroller.NewNodeController(
c.CloudProvider,
internalclientset.FromUnversionedClient(c.KubeClient),
s.PodEvictionTimeout.Duration,
util.NewTokenBucketRateLimiter(s.DeletingPodsQps, s.DeletingPodsBurst),
util.NewTokenBucketRateLimiter(s.DeletingPodsQps, s.DeletingPodsBurst), // upstream uses the same ones too
s.NodeMonitorGracePeriod.Duration,
s.NodeStartupGracePeriod.Duration,
s.NodeMonitorPeriod.Duration,
clusterCIDR,
s.AllocateNodeCIDRs,
)
controller.Run(s.NodeSyncPeriod.Duration)
}
func (c *MasterConfig) createSchedulerConfig() (*scheduler.Config, error) {
var policy schedulerapi.Policy
var configData []byte
// TODO make the rate limiter configurable
configFactory := factory.NewConfigFactory(c.KubeClient, kapi.DefaultSchedulerName)
if _, err := os.Stat(c.Options.SchedulerConfigFile); err == nil {
configData, err = ioutil.ReadFile(c.Options.SchedulerConfigFile)
if err != nil {
return nil, fmt.Errorf("unable to read scheduler config: %v", err)
}
err = runtime.DecodeInto(latestschedulerapi.Codec, configData, &policy)
if err != nil {
return nil, fmt.Errorf("invalid scheduler configuration: %v", err)
}
return configFactory.CreateFromConfig(policy)
}
// if the config file isn't provided, use the default provider
return configFactory.CreateFromProvider(factory.DefaultProvider)
}