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volumes.go
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volumes.go
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package controller
import (
"fmt"
"github.com/openshift/origin/pkg/cmd/server/bootstrappolicy"
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"
kubecontroller "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"
"k8s.io/kubernetes/pkg/cloudprovider"
attachdetachcontroller "k8s.io/kubernetes/pkg/controller/volume/attachdetach"
persistentvolumecontroller "k8s.io/kubernetes/pkg/controller/volume/persistentvolume"
"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"
)
type PersistentVolumeControllerConfig struct {
RecyclerImage string
CloudProvider cloudprovider.Interface
}
func (c *PersistentVolumeControllerConfig) RunController(ctx kubecontroller.ControllerContext) (bool, error) {
alphaProvisioner, err := kctrlmgr.NewAlphaVolumeProvisioner(c.CloudProvider, ctx.Options.VolumeConfiguration)
if err != nil {
return false, fmt.Errorf("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: "persistentvolume-controller"})
eventcast.StartRecordingToSink(
&kv1core.EventSinkImpl{
Interface: ctx.ClientBuilder.ClientGoClientOrDie("persistent-volume-binder").CoreV1().Events(""),
},
)
plugins, err := probeRecyclableVolumePlugins(ctx.Options.VolumeConfiguration, c.RecyclerImage, bootstrappolicy.InfraPersistentVolumeRecyclerControllerServiceAccountName)
if err != nil {
return false, err
}
volumeController := persistentvolumecontroller.NewController(
persistentvolumecontroller.ControllerParameters{
KubeClient: ctx.ClientBuilder.ClientOrDie("persistent-volume-binder"),
SyncPeriod: ctx.Options.PVClaimBinderSyncPeriod.Duration,
AlphaProvisioner: alphaProvisioner,
VolumePlugins: plugins,
Cloud: c.CloudProvider,
ClusterName: ctx.Options.ClusterName,
VolumeInformer: ctx.InformerFactory.Core().V1().PersistentVolumes(),
ClaimInformer: ctx.InformerFactory.Core().V1().PersistentVolumeClaims(),
ClassInformer: ctx.InformerFactory.Storage().V1beta1().StorageClasses(),
EventRecorder: recorder,
EnableDynamicProvisioning: ctx.Options.VolumeConfiguration.EnableDynamicProvisioning,
})
go volumeController.Run(ctx.Stop)
return true, nil
}
type PersistentVolumeAttachDetachControllerConfig struct {
CloudProvider cloudprovider.Interface
}
func (c *PersistentVolumeAttachDetachControllerConfig) RunController(ctx kubecontroller.ControllerContext) (bool, error) {
attachDetachController, err := attachdetachcontroller.NewAttachDetachController(
ctx.ClientBuilder.ClientOrDie("attachdetach-controller"),
ctx.InformerFactory.Core().V1().Pods(),
ctx.InformerFactory.Core().V1().Nodes(),
ctx.InformerFactory.Core().V1().PersistentVolumeClaims(),
ctx.InformerFactory.Core().V1().PersistentVolumes(),
c.CloudProvider,
kctrlmgr.ProbeAttachableVolumePlugins(ctx.Options.VolumeConfiguration),
ctx.Options.DisableAttachDetachReconcilerSync,
ctx.Options.ReconcilerSyncLoopPeriod.Duration,
)
if err != nil {
return false, fmt.Errorf("failed to start attach/detach persistent volume controller: %v", err)
}
go attachDetachController.Run(ctx.Stop)
return true, nil
}
// probeRecyclableVolumePlugins collects all persistent volume plugins into an easy to use list.
// TODO: Move this into some helper package?
func probeRecyclableVolumePlugins(config componentconfig.VolumeConfiguration, recyclerImageName, recyclerServiceAccountName string) ([]volume.VolumePlugin, error) {
uid := int64(0)
defaultScrubPod := volume.NewPersistentVolumeRecyclerPodTemplate()
// TODO: Move the recycler pods to dedicated namespace instead of polluting
// openshift-infra.
defaultScrubPod.Namespace = "openshift-infra"
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 {
return nil, fmt.Errorf("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 {
return nil, fmt.Errorf("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, nil
}