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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"
kapi "github.com/GoogleCloudPlatform/kubernetes/pkg/api"
"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
"github.com/GoogleCloudPlatform/kubernetes/pkg/client/record"
"github.com/GoogleCloudPlatform/kubernetes/pkg/cloudprovider/nodecontroller"
"github.com/GoogleCloudPlatform/kubernetes/pkg/controller"
"github.com/GoogleCloudPlatform/kubernetes/pkg/master"
"github.com/GoogleCloudPlatform/kubernetes/pkg/namespace"
"github.com/GoogleCloudPlatform/kubernetes/pkg/resourcequota"
"github.com/GoogleCloudPlatform/kubernetes/pkg/service"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
"github.com/GoogleCloudPlatform/kubernetes/pkg/volume"
"github.com/GoogleCloudPlatform/kubernetes/pkg/volume/host_path"
"github.com/GoogleCloudPlatform/kubernetes/pkg/volume/nfs"
"github.com/GoogleCloudPlatform/kubernetes/pkg/volumeclaimbinder"
"github.com/GoogleCloudPlatform/kubernetes/plugin/pkg/scheduler"
_ "github.com/GoogleCloudPlatform/kubernetes/plugin/pkg/scheduler/algorithmprovider"
schedulerapi "github.com/GoogleCloudPlatform/kubernetes/plugin/pkg/scheduler/api"
latestschedulerapi "github.com/GoogleCloudPlatform/kubernetes/plugin/pkg/scheduler/api/latest"
"github.com/GoogleCloudPlatform/kubernetes/plugin/pkg/scheduler/factory"
)
const (
KubeAPIPrefix = "/api"
KubeAPIPrefixV1Beta3 = "/api/v1beta3"
KubeAPIPrefixV1 = "/api/v1"
)
// 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 {
c.Master.RestfulContainer = container
_ = master.New(c.Master)
messages := []string{}
if !c.Master.DisableV1Beta3 {
messages = append(messages, fmt.Sprintf("Started Kubernetes API at %%s%s (deprecated)", KubeAPIPrefixV1Beta3))
}
if !c.Master.DisableV1 {
messages = append(messages, fmt.Sprintf("Started Kubernetes API at %%s%s", KubeAPIPrefixV1))
}
return messages
}
// RunNamespaceController starts the Kubernetes Namespace Manager
func (c *MasterConfig) RunNamespaceController() {
namespaceController := namespace.NewNamespaceManager(c.KubeClient, c.ControllerManager.NamespaceSyncPeriod)
namespaceController.Run()
glog.Infof("Started Kubernetes Namespace Manager")
}
// RunPersistentVolumeClaimBinder starts the Kubernetes Persistent Volume Claim Binder
func (c *MasterConfig) RunPersistentVolumeClaimBinder() {
binder := volumeclaimbinder.NewPersistentVolumeClaimBinder(c.KubeClient, c.ControllerManager.PVClaimBinderSyncPeriod)
binder.Run()
glog.Infof("Started Kubernetes Persistent Volume Claim Binder")
}
func (c *MasterConfig) RunPersistentVolumeClaimRecycler(recyclerImageName string) {
hostPathRecycler := &volume.RecyclableVolumeConfig{
ImageName: recyclerImageName,
Command: []string{"/usr/share/openshift/scripts/volumes/recycler.sh"},
Args: []string{"/scrub"},
Timeout: int64(60),
}
nfsRecycler := &volume.RecyclableVolumeConfig{
ImageName: recyclerImageName,
Command: []string{"/usr/share/openshift/scripts/volumes/recycler.sh"},
Args: []string{"/scrub"},
Timeout: int64(300),
}
allPlugins := []volume.VolumePlugin{}
allPlugins = append(allPlugins, host_path.ProbeVolumePlugins(hostPathRecycler)...)
allPlugins = append(allPlugins, nfs.ProbeVolumePlugins(nfsRecycler)...)
recycler, err := volumeclaimbinder.NewPersistentVolumeRecycler(c.KubeClient, c.ControllerManager.PVClaimBinderSyncPeriod, allPlugins)
if err != nil {
glog.Fatalf("Could not start PersistentVolumeRecycler: %+v", err)
}
recycler.Run()
glog.Infof("Started Kubernetes PersistentVolumeRecycler")
}
// RunReplicationController starts the Kubernetes replication controller sync loop
func (c *MasterConfig) RunReplicationController(client *client.Client) {
controllerManager := controller.NewReplicationManager(client, controller.BurstReplicas)
go controllerManager.Run(c.ControllerManager.ConcurrentRCSyncs, util.NeverStop)
glog.Infof("Started Kubernetes Replication Manager")
}
// RunEndpointController starts the Kubernetes replication controller sync loop
func (c *MasterConfig) RunEndpointController() {
endpoints := service.NewEndpointController(c.KubeClient)
go endpoints.Run(c.ControllerManager.ConcurrentEndpointSyncs, util.NeverStop)
glog.Infof("Started Kubernetes Endpoint Controller")
}
// 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: "scheduler"})
eventcast.StartRecordingToSink(c.KubeClient.Events(""))
s := scheduler.New(config)
s.Run()
glog.Infof("Started Kubernetes Scheduler")
}
// RunResourceQuotaManager starts the resource quota manager
func (c *MasterConfig) RunResourceQuotaManager() {
resourceQuotaManager := resourcequota.NewResourceQuotaManager(c.KubeClient)
resourceQuotaManager.Run(c.ControllerManager.ResourceQuotaSyncPeriod)
}
// RunNodeController starts the node controller
func (c *MasterConfig) RunNodeController() {
s := c.ControllerManager
controller := nodecontroller.NewNodeController(
c.CloudProvider,
c.KubeClient,
s.RegisterRetryCount,
s.PodEvictionTimeout,
nodecontroller.NewPodEvictor(util.NewTokenBucketRateLimiter(s.DeletingPodsQps, s.DeletingPodsBurst)),
s.NodeMonitorGracePeriod,
s.NodeStartupGracePeriod,
s.NodeMonitorPeriod,
(*net.IPNet)(&s.ClusterCIDR),
s.AllocateNodeCIDRs,
)
controller.Run(s.NodeSyncPeriod)
glog.Infof("Started Kubernetes Node Controller")
}
func (c *MasterConfig) createSchedulerConfig() (*scheduler.Config, error) {
var policy schedulerapi.Policy
var configData []byte
configFactory := factory.NewConfigFactory(c.KubeClient)
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 = latestschedulerapi.Codec.DecodeInto(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)
}