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/
controller.go
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/
controller.go
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/*
Copyright 2020 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package persistentvolume
import (
"fmt"
v1 "k8s.io/api/core/v1"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/client-go/informers"
coreinformers "k8s.io/client-go/informers/core/v1"
clientset "k8s.io/client-go/kubernetes"
v1core "k8s.io/client-go/kubernetes/typed/core/v1"
listersv1 "k8s.io/client-go/listers/core/v1"
"k8s.io/client-go/tools/cache"
vcclient "sigs.k8s.io/multi-tenancy/incubator/virtualcluster/pkg/client/clientset/versioned"
vcinformers "sigs.k8s.io/multi-tenancy/incubator/virtualcluster/pkg/client/informers/externalversions/tenancy/v1alpha1"
"sigs.k8s.io/multi-tenancy/incubator/virtualcluster/pkg/syncer/apis/config"
"sigs.k8s.io/multi-tenancy/incubator/virtualcluster/pkg/syncer/manager"
pa "sigs.k8s.io/multi-tenancy/incubator/virtualcluster/pkg/syncer/patrol"
uw "sigs.k8s.io/multi-tenancy/incubator/virtualcluster/pkg/syncer/uwcontroller"
mc "sigs.k8s.io/multi-tenancy/incubator/virtualcluster/pkg/util/mccontroller"
"sigs.k8s.io/multi-tenancy/incubator/virtualcluster/pkg/util/plugin"
)
func init() {
plugin.SyncerResourceRegister.Register(&plugin.Registration{
ID: "persistentvolume",
InitFn: func(ctx *plugin.InitContext) (interface{}, error) {
return NewPVController(ctx.Config.(*config.SyncerConfiguration), ctx.Client, ctx.Informer, ctx.VCClient, ctx.VCInformer, manager.ResourceSyncerOptions{})
},
})
}
type controller struct {
manager.BaseResourceSyncer
// super master client
client v1core.CoreV1Interface
// super master pv/pvc lister/synced functions
informer coreinformers.Interface
pvLister listersv1.PersistentVolumeLister
pvSynced cache.InformerSynced
pvcLister listersv1.PersistentVolumeClaimLister
pvcSynced cache.InformerSynced
}
func NewPVController(config *config.SyncerConfiguration,
client clientset.Interface,
informer informers.SharedInformerFactory,
vcClient vcclient.Interface,
vcInformer vcinformers.VirtualClusterInformer,
options manager.ResourceSyncerOptions) (manager.ResourceSyncer, error) {
c := &controller{
BaseResourceSyncer: manager.BaseResourceSyncer{
Config: config,
},
client: client.CoreV1(),
informer: informer.Core().V1(),
}
var err error
c.MultiClusterController, err = mc.NewMCController(&v1.PersistentVolume{}, &v1.PersistentVolumeList{}, c, mc.WithOptions(options.MCOptions))
if err != nil {
return nil, err
}
c.pvLister = c.informer.PersistentVolumes().Lister()
c.pvcLister = c.informer.PersistentVolumeClaims().Lister()
if options.IsFake {
c.pvSynced = func() bool { return true }
c.pvcSynced = func() bool { return true }
} else {
c.pvSynced = c.informer.PersistentVolumes().Informer().HasSynced
c.pvcSynced = c.informer.PersistentVolumeClaims().Informer().HasSynced
}
c.UpwardController, err = uw.NewUWController(&v1.PersistentVolume{}, c, uw.WithOptions(options.UWOptions))
if err != nil {
return nil, err
}
c.Patroller, err = pa.NewPatroller(&v1.PersistentVolume{}, c, pa.WithOptions(options.PatrolOptions))
if err != nil {
return nil, err
}
c.informer.PersistentVolumes().Informer().AddEventHandler(
cache.FilteringResourceEventHandler{
FilterFunc: func(obj interface{}) bool {
switch t := obj.(type) {
case *v1.PersistentVolume:
return boundPersistentVolume(t)
case cache.DeletedFinalStateUnknown:
if e, ok := t.Obj.(*v1.PersistentVolume); ok {
return boundPersistentVolume(e)
}
utilruntime.HandleError(fmt.Errorf("unable to convert object %v to *v1.PersistentVolume", obj))
return false
default:
utilruntime.HandleError(fmt.Errorf("unable to handle object in super master persistentvolume controller: %v", obj))
return false
}
},
Handler: cache.ResourceEventHandlerFuncs{
AddFunc: c.enqueuePersistentVolume,
UpdateFunc: func(oldObj, newObj interface{}) {
newPV := newObj.(*v1.PersistentVolume)
oldPV := oldObj.(*v1.PersistentVolume)
if newPV.ResourceVersion != oldPV.ResourceVersion {
c.enqueuePersistentVolume(newObj)
}
},
DeleteFunc: c.enqueuePersistentVolume,
},
})
return c, nil
}
func boundPersistentVolume(e *v1.PersistentVolume) bool {
return e.Spec.ClaimRef != nil
}
func (c *controller) enqueuePersistentVolume(obj interface{}) {
key, err := cache.DeletionHandlingMetaNamespaceKeyFunc(obj)
if err != nil {
utilruntime.HandleError(fmt.Errorf("couldn't get key for object %v: %v", obj, err))
return
}
c.UpwardController.AddToQueue(key)
}