/
controller.go
166 lines (146 loc) · 5.34 KB
/
controller.go
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/*
* Copyright 2022 The Multicluster-Scheduler 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 cleanup
import (
"context"
"fmt"
"strings"
"time"
"admiralty.io/multicluster-scheduler/pkg/common"
"admiralty.io/multicluster-scheduler/pkg/controller"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
coreinformers "k8s.io/client-go/informers/core/v1"
networkinginformers "k8s.io/client-go/informers/networking/v1"
"k8s.io/client-go/kubernetes"
corelisters "k8s.io/client-go/listers/core/v1"
networkinglisters "k8s.io/client-go/listers/networking/v1"
)
type reconciler struct {
kubeClient kubernetes.Interface
podLister corelisters.PodLister
serviceLister corelisters.ServiceLister
ingressLister networkinglisters.IngressLister
configMapLister corelisters.ConfigMapLister
secretLister corelisters.SecretLister
knownFinalizers map[string]bool
}
func NewController(
kubeClient kubernetes.Interface,
podInformer coreinformers.PodInformer,
serviceInformer coreinformers.ServiceInformer,
ingressInformer networkinginformers.IngressInformer,
configMapInformer coreinformers.ConfigMapInformer,
secretInformer coreinformers.SecretInformer,
knownFinalizers []string) *controller.Controller {
r := &reconciler{
kubeClient: kubeClient,
podLister: podInformer.Lister(),
serviceLister: serviceInformer.Lister(),
ingressLister: ingressInformer.Lister(),
configMapLister: configMapInformer.Lister(),
secretLister: secretInformer.Lister(),
knownFinalizers: map[string]bool{},
}
for _, f := range knownFinalizers {
r.knownFinalizers[f] = true
}
c := controller.New(
"cleanup",
r,
podInformer.Informer().HasSynced,
serviceInformer.Informer().HasSynced,
ingressInformer.Informer().HasSynced,
configMapInformer.Informer().HasSynced,
secretInformer.Informer().HasSynced,
)
enqueue := func(kind string) func(o interface{}) {
return func(o interface{}) {
m := o.(metav1.Object)
c.EnqueueKey(key{
kind: kind,
namespace: m.GetNamespace(),
name: m.GetName(),
})
}
}
podInformer.Informer().AddEventHandler(controller.HandleAddUpdateWith(enqueue("Pod")))
serviceInformer.Informer().AddEventHandler(controller.HandleAddUpdateWith(enqueue("Service")))
ingressInformer.Informer().AddEventHandler(controller.HandleAddUpdateWith(enqueue("Ingress")))
configMapInformer.Informer().AddEventHandler(controller.HandleAddUpdateWith(enqueue("ConfigMap")))
secretInformer.Informer().AddEventHandler(controller.HandleAddUpdateWith(enqueue("Secret")))
return c
}
type key struct {
kind string
namespace string
name string
}
func (r reconciler) Handle(k interface{}) (requeueAfter *time.Duration, err error) {
ctx := context.Background()
t := k.(key)
var o metav1.Object
switch t.kind {
case "Pod":
o, err = r.podLister.Pods(t.namespace).Get(t.name)
case "Service":
o, err = r.serviceLister.Services(t.namespace).Get(t.name)
case "Ingress":
o, err = r.ingressLister.Ingresses(t.namespace).Get(t.name)
case "ConfigMap":
o, err = r.configMapLister.ConfigMaps(t.namespace).Get(t.name)
case "Secret":
o, err = r.secretLister.Secrets(t.namespace).Get(t.name)
default:
err = fmt.Errorf("unknown key kind %s", t.kind)
}
if err != nil {
if errors.IsNotFound(err) {
return nil, nil
}
return nil, fmt.Errorf("cannot get %s: %v", t.kind, err)
}
var unknownFinalizers []string
for _, f := range o.GetFinalizers() {
if strings.HasPrefix(f, common.KeyPrefix) && !r.knownFinalizers[f] {
unknownFinalizers = append(unknownFinalizers, f)
}
}
if len(unknownFinalizers) > 0 {
switch t.kind {
case "Pod":
o, err = r.kubeClient.CoreV1().Pods(t.namespace).Patch(ctx, t.name, types.StrategicMergePatchType, []byte(patch(unknownFinalizers)), metav1.PatchOptions{})
case "Service":
o, err = r.kubeClient.CoreV1().Services(t.namespace).Patch(ctx, t.name, types.StrategicMergePatchType, []byte(patch(unknownFinalizers)), metav1.PatchOptions{})
case "Ingress":
o, err = r.kubeClient.NetworkingV1().Ingresses(t.namespace).Patch(ctx, t.name, types.StrategicMergePatchType, []byte(patch(unknownFinalizers)), metav1.PatchOptions{})
case "ConfigMap":
o, err = r.kubeClient.CoreV1().ConfigMaps(t.namespace).Patch(ctx, t.name, types.StrategicMergePatchType, []byte(patch(unknownFinalizers)), metav1.PatchOptions{})
case "Secret":
o, err = r.kubeClient.CoreV1().Secrets(t.namespace).Patch(ctx, t.name, types.StrategicMergePatchType, []byte(patch(unknownFinalizers)), metav1.PatchOptions{})
default:
err = fmt.Errorf("unknown key kind %s", t.kind)
}
if err != nil {
return nil, fmt.Errorf("cannot patch %s: %v", t.kind, err)
}
}
return nil, nil
}
func patch(finalizers []string) string {
return `{"metadata":{"$deleteFromPrimitiveList/finalizers":["` + strings.Join(finalizers, `","`) + `"]}}`
}