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master.go
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master.go
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package kubernetes
import (
"fmt"
"io/ioutil"
"os"
"time"
"github.com/emicklei/go-restful"
"github.com/golang/glog"
kapi "github.com/GoogleCloudPlatform/kubernetes/pkg/api"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api/resource"
kclient "github.com/GoogleCloudPlatform/kubernetes/pkg/client"
"github.com/GoogleCloudPlatform/kubernetes/pkg/client/record"
minioncontroller "github.com/GoogleCloudPlatform/kubernetes/pkg/cloudprovider/nodecontroller"
"github.com/GoogleCloudPlatform/kubernetes/pkg/controller"
"github.com/GoogleCloudPlatform/kubernetes/pkg/master"
"github.com/GoogleCloudPlatform/kubernetes/pkg/resourcequota"
"github.com/GoogleCloudPlatform/kubernetes/pkg/service"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
"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"
"github.com/GoogleCloudPlatform/kubernetes/pkg/namespace"
)
const (
KubeAPIPrefix = "/api"
KubeAPIPrefixV1Beta1 = "/api/v1beta1"
KubeAPIPrefixV1Beta2 = "/api/v1beta2"
KubeAPIPrefixV1Beta3 = "/api/v1beta3"
KubeAPIPrefixV1 = "/api/v1"
)
// TODO: Longer term we should read this from some config store, rather than a flag.
func (c *MasterConfig) EnsurePortalFlags() {
if c.PortalNet == nil {
glog.Fatal("No --portal-net specified")
}
}
// 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 {
kubeletClient, err := kclient.NewKubeletClient(c.KubeletClientConfig)
if err != nil {
glog.Fatalf("Unable to configure Kubelet client: %v", err)
}
masterConfig := &master.Config{
PublicAddress: c.MasterIP,
ReadWritePort: c.MasterPort,
ReadOnlyPort: c.MasterPort,
EtcdHelper: c.EtcdHelper,
EventTTL: 2 * time.Hour,
PortalNet: c.PortalNet,
RequestContextMapper: c.RequestContextMapper,
RestfulContainer: container,
KubeletClient: kubeletClient,
APIPrefix: KubeAPIPrefix,
EnableV1: true,
EnableCoreControllers: true,
MasterCount: c.MasterCount,
Authorizer: c.Authorizer,
AdmissionControl: c.AdmissionControl,
}
_ = master.New(masterConfig)
return []string{
fmt.Sprintf("Started Kubernetes API at %%s%s", KubeAPIPrefixV1Beta1),
fmt.Sprintf("Started Kubernetes API at %%s%s", KubeAPIPrefixV1Beta3),
fmt.Sprintf("Started Kubernetes API at %%s%s", KubeAPIPrefixV1Beta3),
fmt.Sprintf("Started Kubernetes API at %%s%s (experimental)", KubeAPIPrefixV1),
}
}
func (c *MasterConfig) RunNamespaceController() {
namespaceController := namespace.NewNamespaceManager(c.KubeClient, 5*time.Minute)
namespaceController.Run()
glog.Infof("Started Kubernetes Namespace Manager")
}
func (c *MasterConfig) RunPersistentVolumeClaimBinder() {
binder := volumeclaimbinder.NewPersistentVolumeClaimBinder(c.KubeClient, 5*time.Minute)
binder.Run()
glog.Infof("Started Kubernetes Persistent Volume Claim Binder")
}
// RunReplicationController starts the Kubernetes replication controller sync loop
func (c *MasterConfig) RunReplicationController() {
controllerManager := controller.NewReplicationManager(c.KubeClient, controller.BurstReplicas)
go controllerManager.Run(5, 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(5, 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")
}
func (c *MasterConfig) RunResourceQuotaManager() {
resourceQuotaManager := resourcequota.NewResourceQuotaManager(c.KubeClient)
resourceQuotaManager.Run(10 * time.Second)
}
func (c *MasterConfig) RunMinionController() {
nodeResources := &kapi.NodeResources{
Capacity: kapi.ResourceList{
kapi.ResourceCPU: *resource.NewMilliQuantity(int64(1*1000), resource.DecimalSI),
kapi.ResourceMemory: *resource.NewQuantity(int64(3*1024*1024*1024), resource.BinarySI),
},
}
minionController := minioncontroller.NewNodeController(
nil, "", c.NodeHosts, nodeResources,
c.KubeClient,
10, // registerRetryCount
5*time.Minute, // podEvictionTimeout
util.NewTokenBucketRateLimiter(0.1, 10), // deleting pods qps / burst
40*time.Second, // monitor grace
1*time.Minute, // startup grace
10*time.Second, // monitor period
nil, // clusterCIDR
false, // allocateNodeCIDRs
)
minionController.Run(10*time.Second, true)
glog.Infof("Started Kubernetes Minion 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.SchedulerConfigFile); err == nil {
configData, err = ioutil.ReadFile(c.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)
}