generated from kubernetes/kubernetes-template-project
/
controller.go
152 lines (133 loc) · 5.27 KB
/
controller.go
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/*
Copyright 2019 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 storageclass
import (
"fmt"
v1 "k8s.io/api/storage/v1"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/client-go/informers"
storageinformers "k8s.io/client-go/informers/storage/v1"
clientset "k8s.io/client-go/kubernetes"
v1storage "k8s.io/client-go/kubernetes/typed/storage/v1"
listersv1 "k8s.io/client-go/listers/storage/v1"
"k8s.io/client-go/tools/cache"
"k8s.io/klog/v2"
vcclient "sigs.k8s.io/cluster-api-provider-nested/virtualcluster/pkg/client/clientset/versioned"
vcinformers "sigs.k8s.io/cluster-api-provider-nested/virtualcluster/pkg/client/informers/externalversions/tenancy/v1alpha1"
"sigs.k8s.io/cluster-api-provider-nested/virtualcluster/pkg/syncer/apis/config"
"sigs.k8s.io/cluster-api-provider-nested/virtualcluster/pkg/syncer/constants"
"sigs.k8s.io/cluster-api-provider-nested/virtualcluster/pkg/syncer/manager"
pa "sigs.k8s.io/cluster-api-provider-nested/virtualcluster/pkg/syncer/patrol"
uw "sigs.k8s.io/cluster-api-provider-nested/virtualcluster/pkg/syncer/uwcontroller"
mc "sigs.k8s.io/cluster-api-provider-nested/virtualcluster/pkg/util/mccontroller"
"sigs.k8s.io/cluster-api-provider-nested/virtualcluster/pkg/util/plugin"
)
func init() {
plugin.SyncerResourceRegister.Register(&plugin.Registration{
ID: "storageclass",
InitFn: func(ctx *plugin.InitContext) (interface{}, error) {
return NewStorageClassController(ctx.Config.(*config.SyncerConfiguration), ctx.Client, ctx.Informer, ctx.VCClient, ctx.VCInformer, manager.ResourceSyncerOptions{})
},
})
}
type controller struct {
manager.BaseResourceSyncer
// super control plane storageclasses client
client v1storage.StorageClassesGetter
// super control plane storageclasses informer/lister/synced functions
informer storageinformers.Interface
storageclassLister listersv1.StorageClassLister
storageclassSynced cache.InformerSynced
}
func NewStorageClassController(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.StorageV1(),
informer: informer.Storage().V1(),
}
var err error
c.MultiClusterController, err = mc.NewMCController(&v1.StorageClass{}, &v1.StorageClassList{}, c, mc.WithOptions(options.MCOptions))
if err != nil {
return nil, err
}
c.storageclassLister = informer.Storage().V1().StorageClasses().Lister()
if options.IsFake {
c.storageclassSynced = func() bool { return true }
} else {
c.storageclassSynced = informer.Storage().V1().StorageClasses().Informer().HasSynced
}
c.UpwardController, err = uw.NewUWController(&v1.StorageClass{}, c, uw.WithOptions(options.UWOptions))
if err != nil {
return nil, err
}
c.Patroller, err = pa.NewPatroller(&v1.StorageClass{}, c, pa.WithOptions(options.PatrolOptions))
if err != nil {
return nil, err
}
c.informer.StorageClasses().Informer().AddEventHandler(
cache.FilteringResourceEventHandler{
FilterFunc: func(obj interface{}) bool {
switch t := obj.(type) {
case *v1.StorageClass:
return publicStorageClass(t)
case cache.DeletedFinalStateUnknown:
if e, ok := t.Obj.(*v1.StorageClass); ok {
return publicStorageClass(e)
}
utilruntime.HandleError(fmt.Errorf("unable to convert object %v to *v1.StorageClass", obj))
return false
default:
utilruntime.HandleError(fmt.Errorf("unable to handle object in super control plane storageclass controller: %v", obj))
return false
}
},
Handler: cache.ResourceEventHandlerFuncs{
AddFunc: c.enqueueStorageClass,
UpdateFunc: func(oldObj, newObj interface{}) {
newStorageClass := newObj.(*v1.StorageClass)
oldStorageClass := oldObj.(*v1.StorageClass)
if newStorageClass.ResourceVersion != oldStorageClass.ResourceVersion {
c.enqueueStorageClass(newObj)
}
},
DeleteFunc: c.enqueueStorageClass,
},
})
return c, nil
}
func publicStorageClass(e *v1.StorageClass) bool {
// We only backpopulate specific storageclass to tenant control planes
return e.Labels[constants.PublicObjectKey] == "true"
}
func (c *controller) enqueueStorageClass(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
}
clusterNames := c.MultiClusterController.GetClusterNames()
if len(clusterNames) == 0 {
klog.Infof("No tenant control planes, stop backpopulate storageclass %v", key)
return
}
for _, clusterName := range clusterNames {
c.UpwardController.AddToQueue(clusterName + "/" + key)
}
}