mirror of
https://github.com/ceph/ceph-csi.git
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333 lines
11 KiB
Go
333 lines
11 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// This file contains adapters that convert between RC and RS,
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// as if ReplicationController were an older API version of ReplicaSet.
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// It allows ReplicaSetController to directly replace the old ReplicationManager,
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// which was previously a manually-maintained copy-paste of RSC.
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package replication
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import (
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"errors"
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"fmt"
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"time"
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apps "k8s.io/api/apps/v1"
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"k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/types"
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utilruntime "k8s.io/apimachinery/pkg/util/runtime"
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"k8s.io/apimachinery/pkg/watch"
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coreinformers "k8s.io/client-go/informers/core/v1"
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clientset "k8s.io/client-go/kubernetes"
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appsv1client "k8s.io/client-go/kubernetes/typed/apps/v1"
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v1client "k8s.io/client-go/kubernetes/typed/core/v1"
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appslisters "k8s.io/client-go/listers/apps/v1"
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v1listers "k8s.io/client-go/listers/core/v1"
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"k8s.io/client-go/tools/cache"
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appsconversion "k8s.io/kubernetes/pkg/apis/apps/v1"
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apiv1 "k8s.io/kubernetes/pkg/apis/core/v1"
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"k8s.io/kubernetes/pkg/apis/extensions"
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"k8s.io/kubernetes/pkg/controller"
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)
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// informerAdapter implements ReplicaSetInformer by wrapping ReplicationControllerInformer
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// and converting objects.
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type informerAdapter struct {
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rcInformer coreinformers.ReplicationControllerInformer
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}
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func (i informerAdapter) Informer() cache.SharedIndexInformer {
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return conversionInformer{i.rcInformer.Informer()}
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}
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func (i informerAdapter) Lister() appslisters.ReplicaSetLister {
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return conversionLister{i.rcInformer.Lister()}
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}
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type conversionInformer struct {
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cache.SharedIndexInformer
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}
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func (i conversionInformer) AddEventHandler(handler cache.ResourceEventHandler) {
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i.SharedIndexInformer.AddEventHandler(conversionEventHandler{handler})
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}
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func (i conversionInformer) AddEventHandlerWithResyncPeriod(handler cache.ResourceEventHandler, resyncPeriod time.Duration) {
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i.SharedIndexInformer.AddEventHandlerWithResyncPeriod(conversionEventHandler{handler}, resyncPeriod)
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}
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type conversionLister struct {
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rcLister v1listers.ReplicationControllerLister
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}
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func (l conversionLister) List(selector labels.Selector) ([]*apps.ReplicaSet, error) {
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rcList, err := l.rcLister.List(selector)
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if err != nil {
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return nil, err
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}
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return convertSlice(rcList)
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}
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func (l conversionLister) ReplicaSets(namespace string) appslisters.ReplicaSetNamespaceLister {
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return conversionNamespaceLister{l.rcLister.ReplicationControllers(namespace)}
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}
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func (l conversionLister) GetPodReplicaSets(pod *v1.Pod) ([]*apps.ReplicaSet, error) {
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rcList, err := l.rcLister.GetPodControllers(pod)
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if err != nil {
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return nil, err
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}
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return convertSlice(rcList)
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}
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type conversionNamespaceLister struct {
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rcLister v1listers.ReplicationControllerNamespaceLister
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}
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func (l conversionNamespaceLister) List(selector labels.Selector) ([]*apps.ReplicaSet, error) {
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rcList, err := l.rcLister.List(selector)
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if err != nil {
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return nil, err
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}
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return convertSlice(rcList)
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}
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func (l conversionNamespaceLister) Get(name string) (*apps.ReplicaSet, error) {
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rc, err := l.rcLister.Get(name)
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if err != nil {
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return nil, err
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}
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return convertRCtoRS(rc, nil)
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}
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type conversionEventHandler struct {
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handler cache.ResourceEventHandler
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}
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func (h conversionEventHandler) OnAdd(obj interface{}) {
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rs, err := convertRCtoRS(obj.(*v1.ReplicationController), nil)
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if err != nil {
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utilruntime.HandleError(fmt.Errorf("dropping RC OnAdd event: can't convert object %#v to RS: %v", obj, err))
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return
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}
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h.handler.OnAdd(rs)
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}
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func (h conversionEventHandler) OnUpdate(oldObj, newObj interface{}) {
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oldRS, err := convertRCtoRS(oldObj.(*v1.ReplicationController), nil)
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if err != nil {
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utilruntime.HandleError(fmt.Errorf("dropping RC OnUpdate event: can't convert old object %#v to RS: %v", oldObj, err))
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return
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}
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newRS, err := convertRCtoRS(newObj.(*v1.ReplicationController), nil)
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if err != nil {
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utilruntime.HandleError(fmt.Errorf("dropping RC OnUpdate event: can't convert new object %#v to RS: %v", newObj, err))
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return
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}
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h.handler.OnUpdate(oldRS, newRS)
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}
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func (h conversionEventHandler) OnDelete(obj interface{}) {
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rc, ok := obj.(*v1.ReplicationController)
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if !ok {
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// Convert the Obj inside DeletedFinalStateUnknown.
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tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
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if !ok {
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utilruntime.HandleError(fmt.Errorf("dropping RC OnDelete event: couldn't get object from tombstone %+v", obj))
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return
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}
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rc, ok = tombstone.Obj.(*v1.ReplicationController)
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if !ok {
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utilruntime.HandleError(fmt.Errorf("dropping RC OnDelete event: tombstone contained object that is not a RC %#v", obj))
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return
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}
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rs, err := convertRCtoRS(rc, nil)
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if err != nil {
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utilruntime.HandleError(fmt.Errorf("dropping RC OnDelete event: can't convert object %#v to RS: %v", obj, err))
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return
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}
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h.handler.OnDelete(cache.DeletedFinalStateUnknown{Key: tombstone.Key, Obj: rs})
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return
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}
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// It's a regular RC object.
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rs, err := convertRCtoRS(rc, nil)
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if err != nil {
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utilruntime.HandleError(fmt.Errorf("dropping RC OnDelete event: can't convert object %#v to RS: %v", obj, err))
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return
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}
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h.handler.OnDelete(rs)
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}
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type clientsetAdapter struct {
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clientset.Interface
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}
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func (c clientsetAdapter) AppsV1() appsv1client.AppsV1Interface {
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return conversionAppsV1Client{c.Interface, c.Interface.AppsV1()}
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}
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func (c clientsetAdapter) Apps() appsv1client.AppsV1Interface {
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return conversionAppsV1Client{c.Interface, c.Interface.AppsV1()}
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}
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type conversionAppsV1Client struct {
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clientset clientset.Interface
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appsv1client.AppsV1Interface
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}
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func (c conversionAppsV1Client) ReplicaSets(namespace string) appsv1client.ReplicaSetInterface {
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return conversionClient{c.clientset.CoreV1().ReplicationControllers(namespace)}
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}
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type conversionClient struct {
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v1client.ReplicationControllerInterface
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}
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func (c conversionClient) Create(rs *apps.ReplicaSet) (*apps.ReplicaSet, error) {
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return convertCall(c.ReplicationControllerInterface.Create, rs)
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}
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func (c conversionClient) Update(rs *apps.ReplicaSet) (*apps.ReplicaSet, error) {
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return convertCall(c.ReplicationControllerInterface.Update, rs)
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}
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func (c conversionClient) UpdateStatus(rs *apps.ReplicaSet) (*apps.ReplicaSet, error) {
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return convertCall(c.ReplicationControllerInterface.UpdateStatus, rs)
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}
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func (c conversionClient) Get(name string, options metav1.GetOptions) (*apps.ReplicaSet, error) {
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rc, err := c.ReplicationControllerInterface.Get(name, options)
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if err != nil {
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return nil, err
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}
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return convertRCtoRS(rc, nil)
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}
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func (c conversionClient) List(opts metav1.ListOptions) (*apps.ReplicaSetList, error) {
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rcList, err := c.ReplicationControllerInterface.List(opts)
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if err != nil {
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return nil, err
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}
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return convertList(rcList)
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}
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func (c conversionClient) Watch(opts metav1.ListOptions) (watch.Interface, error) {
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// This is not used by RSC because we wrap the shared informer instead.
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return nil, errors.New("Watch() is not implemented for conversionClient")
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}
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func (c conversionClient) Patch(name string, pt types.PatchType, data []byte, subresources ...string) (result *apps.ReplicaSet, err error) {
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// This is not used by RSC.
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return nil, errors.New("Patch() is not implemented for conversionClient")
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}
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func convertSlice(rcList []*v1.ReplicationController) ([]*apps.ReplicaSet, error) {
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rsList := make([]*apps.ReplicaSet, 0, len(rcList))
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for _, rc := range rcList {
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rs, err := convertRCtoRS(rc, nil)
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if err != nil {
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return nil, err
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}
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rsList = append(rsList, rs)
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}
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return rsList, nil
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}
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func convertList(rcList *v1.ReplicationControllerList) (*apps.ReplicaSetList, error) {
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rsList := &apps.ReplicaSetList{Items: make([]apps.ReplicaSet, len(rcList.Items))}
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for i := range rcList.Items {
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rc := &rcList.Items[i]
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_, err := convertRCtoRS(rc, &rsList.Items[i])
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if err != nil {
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return nil, err
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}
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}
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return rsList, nil
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}
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func convertCall(fn func(*v1.ReplicationController) (*v1.ReplicationController, error), rs *apps.ReplicaSet) (*apps.ReplicaSet, error) {
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rc, err := convertRStoRC(rs)
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if err != nil {
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return nil, err
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}
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result, err := fn(rc)
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if err != nil {
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return nil, err
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}
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return convertRCtoRS(result, nil)
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}
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func convertRCtoRS(rc *v1.ReplicationController, out *apps.ReplicaSet) (*apps.ReplicaSet, error) {
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var rsInternal extensions.ReplicaSet
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if err := apiv1.Convert_v1_ReplicationController_to_extensions_ReplicaSet(rc, &rsInternal, nil); err != nil {
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return nil, fmt.Errorf("can't convert ReplicationController %v/%v to ReplicaSet: %v", rc.Namespace, rc.Name, err)
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}
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if out == nil {
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out = new(apps.ReplicaSet)
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}
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if err := appsconversion.Convert_extensions_ReplicaSet_To_v1_ReplicaSet(&rsInternal, out, nil); err != nil {
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return nil, fmt.Errorf("can't convert ReplicaSet (converted from ReplicationController %v/%v) from internal to extensions/v1beta1: %v", rc.Namespace, rc.Name, err)
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}
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return out, nil
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}
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func convertRStoRC(rs *apps.ReplicaSet) (*v1.ReplicationController, error) {
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var rsInternal extensions.ReplicaSet
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if err := appsconversion.Convert_v1_ReplicaSet_To_extensions_ReplicaSet(rs, &rsInternal, nil); err != nil {
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return nil, fmt.Errorf("can't convert ReplicaSet (converting to ReplicationController %v/%v) from extensions/v1beta1 to internal: %v", rs.Namespace, rs.Name, err)
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}
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var rc v1.ReplicationController
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if err := apiv1.Convert_extensions_ReplicaSet_to_v1_ReplicationController(&rsInternal, &rc, nil); err != nil {
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return nil, fmt.Errorf("can't convert ReplicaSet to ReplicationController %v/%v: %v", rs.Namespace, rs.Name, err)
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}
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return &rc, nil
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}
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type podControlAdapter struct {
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controller.PodControlInterface
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}
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func (pc podControlAdapter) CreatePods(namespace string, template *v1.PodTemplateSpec, object runtime.Object) error {
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// This is not used by RSC.
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return errors.New("CreatePods() is not implemented for podControlAdapter")
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}
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func (pc podControlAdapter) CreatePodsOnNode(nodeName, namespace string, template *v1.PodTemplateSpec, object runtime.Object, controllerRef *metav1.OwnerReference) error {
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// This is not used by RSC.
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return errors.New("CreatePodsOnNode() is not implemented for podControlAdapter")
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}
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func (pc podControlAdapter) CreatePodsWithControllerRef(namespace string, template *v1.PodTemplateSpec, object runtime.Object, controllerRef *metav1.OwnerReference) error {
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rc, err := convertRStoRC(object.(*apps.ReplicaSet))
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if err != nil {
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return err
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}
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return pc.PodControlInterface.CreatePodsWithControllerRef(namespace, template, rc, controllerRef)
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}
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func (pc podControlAdapter) DeletePod(namespace string, podID string, object runtime.Object) error {
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rc, err := convertRStoRC(object.(*apps.ReplicaSet))
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if err != nil {
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return err
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}
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return pc.PodControlInterface.DeletePod(namespace, podID, rc)
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}
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