generated from kubernetes/kubernetes-template-project
/
controller.go
148 lines (129 loc) · 4.86 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 service
import (
"fmt"
corev1 "k8s.io/api/core/v1"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/client-go/informers"
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/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/conversion"
"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: "service",
InitFn: func(ctx *plugin.InitContext) (interface{}, error) {
return NewServiceController(ctx.Config.(*config.SyncerConfiguration), ctx.Client, ctx.Informer, ctx.VCClient, ctx.VCInformer, manager.ResourceSyncerOptions{})
},
})
}
type controller struct {
manager.BaseResourceSyncer
// super control plane service client
serviceClient v1core.ServicesGetter
// super control plane informer/listers/synced functions
serviceLister listersv1.ServiceLister
serviceSynced cache.InformerSynced
}
func NewServiceController(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,
},
serviceClient: client.CoreV1(),
}
var err error
c.MultiClusterController, err = mc.NewMCController(&corev1.Service{}, &corev1.ServiceList{}, c, mc.WithOptions(options.MCOptions))
if err != nil {
return nil, err
}
c.serviceLister = informer.Core().V1().Services().Lister()
if options.IsFake {
c.serviceSynced = func() bool { return true }
} else {
c.serviceSynced = informer.Core().V1().Services().Informer().HasSynced
}
c.UpwardController, err = uw.NewUWController(&corev1.Service{}, c, uw.WithOptions(options.UWOptions))
if err != nil {
return nil, err
}
c.Patroller, err = pa.NewPatroller(&corev1.Service{}, c, pa.WithOptions(options.PatrolOptions))
if err != nil {
return nil, err
}
informer.Core().V1().Services().Informer().AddEventHandler(
cache.FilteringResourceEventHandler{
FilterFunc: func(obj interface{}) bool {
switch t := obj.(type) {
case *corev1.Service:
return isBackPopulateService(t)
case cache.DeletedFinalStateUnknown:
if e, ok := t.Obj.(*corev1.Service); ok {
return isBackPopulateService(e)
}
utilruntime.HandleError(fmt.Errorf("unable to convert object %v to *corev1.Service", obj))
return false
default:
utilruntime.HandleError(fmt.Errorf("unable to handle object in super control plane service controller: %v", obj))
return false
}
},
Handler: cache.ResourceEventHandlerFuncs{
AddFunc: c.enqueueService,
UpdateFunc: func(oldObj, newObj interface{}) {
newService := newObj.(*corev1.Service)
oldService := oldObj.(*corev1.Service)
if newService.ResourceVersion != oldService.ResourceVersion {
c.enqueueService(newObj)
}
},
DeleteFunc: c.enqueueService,
},
})
return c, nil
}
func isBackPopulateService(svc *corev1.Service) bool {
return svc.Spec.Type == corev1.ServiceTypeLoadBalancer || svc.Spec.Type == corev1.ServiceTypeClusterIP
}
func (c *controller) enqueueService(obj interface{}) {
svc, ok := obj.(*corev1.Service)
if !ok {
return
}
clusterName, _ := conversion.GetVirtualOwner(svc)
if clusterName == "" {
return
}
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)
}