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kube_controller_init.go
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kube_controller_init.go
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package master
import (
"fmt"
"io/ioutil"
"net"
"os"
"github.com/golang/glog"
"k8s.io/apimachinery/pkg/runtime"
utilwait "k8s.io/apimachinery/pkg/util/wait"
utilfeature "k8s.io/apiserver/pkg/util/feature"
kv1core "k8s.io/client-go/kubernetes/typed/core/v1"
kclientv1 "k8s.io/client-go/pkg/api/v1"
"k8s.io/client-go/tools/record"
kctrlmgr "k8s.io/kubernetes/cmd/kube-controller-manager/app"
kapi "k8s.io/kubernetes/pkg/api"
kapiv1 "k8s.io/kubernetes/pkg/api/v1"
"k8s.io/kubernetes/pkg/apis/componentconfig"
kclientset "k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
nodecontroller "k8s.io/kubernetes/pkg/controller/node"
servicecontroller "k8s.io/kubernetes/pkg/controller/service"
attachdetachcontroller "k8s.io/kubernetes/pkg/controller/volume/attachdetach"
persistentvolumecontroller "k8s.io/kubernetes/pkg/controller/volume/persistentvolume"
"k8s.io/kubernetes/pkg/features"
"k8s.io/kubernetes/pkg/volume"
"k8s.io/kubernetes/pkg/volume/aws_ebs"
"k8s.io/kubernetes/pkg/volume/azure_dd"
"k8s.io/kubernetes/pkg/volume/cinder"
"k8s.io/kubernetes/pkg/volume/flexvolume"
"k8s.io/kubernetes/pkg/volume/gce_pd"
"k8s.io/kubernetes/pkg/volume/glusterfs"
"k8s.io/kubernetes/pkg/volume/host_path"
"k8s.io/kubernetes/pkg/volume/nfs"
"k8s.io/kubernetes/pkg/volume/rbd"
"k8s.io/kubernetes/pkg/volume/vsphere_volume"
"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"
)
// this file contains our special cased controller initialization functions.
// TODO refactor this into the same controller init function style. I suspect this means having the MasterConfig
// produce a set of controller init functions. For now, don't mess with this to keep the diff sane.
func (c *MasterConfig) RunPersistentVolumeController(client kclientset.Interface, namespace, recyclerImageName, recyclerServiceAccountName string) {
s := c.ControllerManager
alphaProvisioner, err := kctrlmgr.NewAlphaVolumeProvisioner(c.CloudProvider, s.VolumeConfiguration)
if err != nil {
glog.Fatalf("A backward-compatible provisioner could not be created: %v, but one was expected. Provisioning will not work. This functionality is considered an early Alpha version.", err)
}
eventcast := record.NewBroadcaster()
recorder := eventcast.NewRecorder(kapi.Scheme, kclientv1.EventSource{Component: "persistent-volume-controller"})
eventcast.StartRecordingToSink(&kv1core.EventSinkImpl{Interface: kv1core.New(c.KubeClient.CoreV1().RESTClient()).Events("")})
volumeController := persistentvolumecontroller.NewController(
persistentvolumecontroller.ControllerParameters{
KubeClient: client,
SyncPeriod: s.PVClaimBinderSyncPeriod.Duration,
AlphaProvisioner: alphaProvisioner,
VolumePlugins: probeRecyclableVolumePlugins(s.VolumeConfiguration, namespace, recyclerImageName, recyclerServiceAccountName),
Cloud: c.CloudProvider,
ClusterName: s.ClusterName,
VolumeInformer: c.Informers.KubernetesInformers().Core().V1().PersistentVolumes(),
ClaimInformer: c.Informers.KubernetesInformers().Core().V1().PersistentVolumeClaims(),
ClassInformer: c.Informers.KubernetesInformers().Storage().V1beta1().StorageClasses(),
EventRecorder: recorder,
EnableDynamicProvisioning: s.VolumeConfiguration.EnableDynamicProvisioning,
})
go volumeController.Run(utilwait.NeverStop)
}
func (c *MasterConfig) RunPersistentVolumeAttachDetachController(client kclientset.Interface) {
s := c.ControllerManager
attachDetachController, err :=
attachdetachcontroller.NewAttachDetachController(
client,
c.Informers.KubernetesInformers().Core().V1().Pods(),
c.Informers.KubernetesInformers().Core().V1().Nodes(),
c.Informers.KubernetesInformers().Core().V1().PersistentVolumeClaims(),
c.Informers.KubernetesInformers().Core().V1().PersistentVolumes(),
c.CloudProvider,
kctrlmgr.ProbeAttachableVolumePlugins(s.VolumeConfiguration),
s.DisableAttachDetachReconcilerSync,
s.ReconcilerSyncLoopPeriod.Duration,
)
if err != nil {
glog.Fatalf("Failed to start attach/detach controller: %v", err)
} else {
go attachDetachController.Run(utilwait.NeverStop)
}
}
// probeRecyclableVolumePlugins collects all persistent volume plugins into an easy to use list.
func probeRecyclableVolumePlugins(config componentconfig.VolumeConfiguration, namespace, recyclerImageName, recyclerServiceAccountName string) []volume.VolumePlugin {
uid := int64(0)
defaultScrubPod := volume.NewPersistentVolumeRecyclerPodTemplate()
defaultScrubPod.Namespace = namespace
defaultScrubPod.Spec.ServiceAccountName = recyclerServiceAccountName
defaultScrubPod.Spec.Containers[0].Image = recyclerImageName
defaultScrubPod.Spec.Containers[0].Command = []string{"/usr/bin/openshift-recycle"}
defaultScrubPod.Spec.Containers[0].Args = []string{"/scrub"}
defaultScrubPod.Spec.Containers[0].SecurityContext = &kapiv1.SecurityContext{RunAsUser: &uid}
defaultScrubPod.Spec.Containers[0].ImagePullPolicy = kapiv1.PullIfNotPresent
allPlugins := []volume.VolumePlugin{}
// The list of plugins to probe is decided by this binary, not
// by dynamic linking or other "magic". Plugins will be analyzed and
// initialized later.
// Each plugin can make use of VolumeConfig. The single arg to this func contains *all* enumerated
// options meant to configure volume plugins. From that single config, create an instance of volume.VolumeConfig
// for a specific plugin and pass that instance to the plugin's ProbeVolumePlugins(config) func.
// HostPath recycling is for testing and development purposes only!
hostPathConfig := volume.VolumeConfig{
RecyclerMinimumTimeout: int(config.PersistentVolumeRecyclerConfiguration.MinimumTimeoutHostPath),
RecyclerTimeoutIncrement: int(config.PersistentVolumeRecyclerConfiguration.IncrementTimeoutHostPath),
RecyclerPodTemplate: defaultScrubPod,
ProvisioningEnabled: config.EnableHostPathProvisioning,
}
if err := kctrlmgr.AttemptToLoadRecycler(config.PersistentVolumeRecyclerConfiguration.PodTemplateFilePathHostPath, &hostPathConfig); err != nil {
glog.Fatalf("Could not create hostpath recycler pod from file %s: %+v", config.PersistentVolumeRecyclerConfiguration.PodTemplateFilePathHostPath, err)
}
allPlugins = append(allPlugins, host_path.ProbeVolumePlugins(hostPathConfig)...)
nfsConfig := volume.VolumeConfig{
RecyclerMinimumTimeout: int(config.PersistentVolumeRecyclerConfiguration.MinimumTimeoutNFS),
RecyclerTimeoutIncrement: int(config.PersistentVolumeRecyclerConfiguration.IncrementTimeoutNFS),
RecyclerPodTemplate: defaultScrubPod,
}
if err := kctrlmgr.AttemptToLoadRecycler(config.PersistentVolumeRecyclerConfiguration.PodTemplateFilePathNFS, &nfsConfig); err != nil {
glog.Fatalf("Could not create NFS recycler pod from file %s: %+v", config.PersistentVolumeRecyclerConfiguration.PodTemplateFilePathNFS, err)
}
allPlugins = append(allPlugins, nfs.ProbeVolumePlugins(nfsConfig)...)
allPlugins = append(allPlugins, aws_ebs.ProbeVolumePlugins()...)
allPlugins = append(allPlugins, gce_pd.ProbeVolumePlugins()...)
allPlugins = append(allPlugins, cinder.ProbeVolumePlugins()...)
allPlugins = append(allPlugins, flexvolume.ProbeVolumePlugins(config.FlexVolumePluginDir)...)
allPlugins = append(allPlugins, vsphere_volume.ProbeVolumePlugins()...)
allPlugins = append(allPlugins, glusterfs.ProbeVolumePlugins()...)
allPlugins = append(allPlugins, rbd.ProbeVolumePlugins()...)
allPlugins = append(allPlugins, azure_dd.ProbeVolumePlugins()...)
return allPlugins
}
// 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.Scheme, kclientv1.EventSource{Component: kapi.DefaultSchedulerName})
eventcast.StartRecordingToSink(&kv1core.EventSinkImpl{Interface: kv1core.New(c.KubeClient.CoreV1().RESTClient()).Events("")})
s := scheduler.New(config)
go s.Run()
}
// RunNodeController starts the node controller
// TODO: handle node CIDR and route allocation
func (c *MasterConfig) RunNodeController() {
s := c.ControllerManager
// this cidr has been validated already
_, clusterCIDR, _ := net.ParseCIDR(s.ClusterCIDR)
_, serviceCIDR, _ := net.ParseCIDR(s.ServiceCIDR)
controller, err := nodecontroller.NewNodeController(
c.Informers.KubernetesInformers().Core().V1().Pods(),
c.Informers.KubernetesInformers().Core().V1().Nodes(),
c.Informers.KubernetesInformers().Extensions().V1beta1().DaemonSets(),
c.CloudProvider,
c.KubeClient,
s.PodEvictionTimeout.Duration,
s.NodeEvictionRate,
s.SecondaryNodeEvictionRate,
s.LargeClusterSizeThreshold,
s.UnhealthyZoneThreshold,
s.NodeMonitorGracePeriod.Duration,
s.NodeStartupGracePeriod.Duration,
s.NodeMonitorPeriod.Duration,
clusterCIDR,
serviceCIDR,
int(s.NodeCIDRMaskSize),
s.AllocateNodeCIDRs,
s.EnableTaintManager,
utilfeature.DefaultFeatureGate.Enabled(features.TaintBasedEvictions),
)
if err != nil {
glog.Fatalf("Unable to start node controller: %v", err)
}
go controller.Run()
}
// RunServiceLoadBalancerController starts the service loadbalancer controller if the cloud provider is configured.
func (c *MasterConfig) RunServiceLoadBalancerController(client kclientset.Interface) {
if c.CloudProvider == nil {
glog.V(2).Infof("Service controller will not start - no cloud provider configured")
return
}
serviceController, err := servicecontroller.New(
c.CloudProvider,
client,
c.Informers.KubernetesInformers().Core().V1().Services(),
c.Informers.KubernetesInformers().Core().V1().Nodes(),
c.ControllerManager.ClusterName,
)
if err != nil {
glog.Errorf("Unable to start service controller: %v", err)
} else {
go serviceController.Run(utilwait.NeverStop, int(c.ControllerManager.ConcurrentServiceSyncs))
}
}
func (c *MasterConfig) createSchedulerConfig() (*scheduler.Config, error) {
var policy schedulerapi.Policy
var configData []byte
// TODO make the rate limiter configurable
configFactory := factory.NewConfigFactory(
c.SchedulerServer.SchedulerName,
c.KubeClient,
c.Informers.KubernetesInformers().Core().V1().Nodes(),
c.Informers.KubernetesInformers().Core().V1().Pods(),
c.Informers.KubernetesInformers().Core().V1().PersistentVolumes(),
c.Informers.KubernetesInformers().Core().V1().PersistentVolumeClaims(),
c.Informers.KubernetesInformers().Core().V1().ReplicationControllers(),
c.Informers.KubernetesInformers().Extensions().V1beta1().ReplicaSets(),
c.Informers.KubernetesInformers().Apps().V1beta1().StatefulSets(),
c.Informers.KubernetesInformers().Core().V1().Services(),
int(c.SchedulerServer.HardPodAffinitySymmetricWeight),
)
if _, err := os.Stat(c.Options.SchedulerConfigFile); err == nil {
configData, err = ioutil.ReadFile(c.SchedulerServer.PolicyConfigFile)
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)
}