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501 lines
16 KiB
Go
501 lines
16 KiB
Go
/*
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Copyright 2014 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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package config
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import (
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"fmt"
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"time"
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"k8s.io/api/core/v1"
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discovery "k8s.io/api/discovery/v1beta1"
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utilruntime "k8s.io/apimachinery/pkg/util/runtime"
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coreinformers "k8s.io/client-go/informers/core/v1"
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discoveryinformers "k8s.io/client-go/informers/discovery/v1beta1"
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"k8s.io/client-go/tools/cache"
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"k8s.io/klog"
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)
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// ServiceHandler is an abstract interface of objects which receive
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// notifications about service object changes.
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type ServiceHandler interface {
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// OnServiceAdd is called whenever creation of new service object
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// is observed.
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OnServiceAdd(service *v1.Service)
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// OnServiceUpdate is called whenever modification of an existing
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// service object is observed.
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OnServiceUpdate(oldService, service *v1.Service)
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// OnServiceDelete is called whenever deletion of an existing service
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// object is observed.
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OnServiceDelete(service *v1.Service)
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// OnServiceSynced is called once all the initial event handlers were
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// called and the state is fully propagated to local cache.
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OnServiceSynced()
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}
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// EndpointsHandler is an abstract interface of objects which receive
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// notifications about endpoints object changes.
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type EndpointsHandler interface {
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// OnEndpointsAdd is called whenever creation of new endpoints object
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// is observed.
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OnEndpointsAdd(endpoints *v1.Endpoints)
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// OnEndpointsUpdate is called whenever modification of an existing
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// endpoints object is observed.
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OnEndpointsUpdate(oldEndpoints, endpoints *v1.Endpoints)
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// OnEndpointsDelete is called whenever deletion of an existing endpoints
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// object is observed.
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OnEndpointsDelete(endpoints *v1.Endpoints)
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// OnEndpointsSynced is called once all the initial event handlers were
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// called and the state is fully propagated to local cache.
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OnEndpointsSynced()
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}
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// EndpointSliceHandler is an abstract interface of objects which receive
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// notifications about endpoint slice object changes.
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type EndpointSliceHandler interface {
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// OnEndpointSliceAdd is called whenever creation of new endpoint slice
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// object is observed.
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OnEndpointSliceAdd(endpointSlice *discovery.EndpointSlice)
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// OnEndpointSliceUpdate is called whenever modification of an existing
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// endpoint slice object is observed.
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OnEndpointSliceUpdate(oldEndpointSlice, newEndpointSlice *discovery.EndpointSlice)
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// OnEndpointSliceDelete is called whenever deletion of an existing
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// endpoint slice object is observed.
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OnEndpointSliceDelete(endpointSlice *discovery.EndpointSlice)
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// OnEndpointSlicesSynced is called once all the initial event handlers were
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// called and the state is fully propagated to local cache.
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OnEndpointSlicesSynced()
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}
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// NoopEndpointSliceHandler is a noop handler for proxiers that have not yet
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// implemented a full EndpointSliceHandler.
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type NoopEndpointSliceHandler struct{}
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// OnEndpointSliceAdd is a noop handler for EndpointSlice creates.
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func (*NoopEndpointSliceHandler) OnEndpointSliceAdd(endpointSlice *discovery.EndpointSlice) {}
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// OnEndpointSliceUpdate is a noop handler for EndpointSlice updates.
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func (*NoopEndpointSliceHandler) OnEndpointSliceUpdate(oldEndpointSlice, newEndpointSlice *discovery.EndpointSlice) {
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}
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// OnEndpointSliceDelete is a noop handler for EndpointSlice deletes.
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func (*NoopEndpointSliceHandler) OnEndpointSliceDelete(endpointSlice *discovery.EndpointSlice) {}
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// OnEndpointSlicesSynced is a noop handler for EndpointSlice syncs.
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func (*NoopEndpointSliceHandler) OnEndpointSlicesSynced() {}
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var _ EndpointSliceHandler = &NoopEndpointSliceHandler{}
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// EndpointsConfig tracks a set of endpoints configurations.
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type EndpointsConfig struct {
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listerSynced cache.InformerSynced
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eventHandlers []EndpointsHandler
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}
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// NewEndpointsConfig creates a new EndpointsConfig.
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func NewEndpointsConfig(endpointsInformer coreinformers.EndpointsInformer, resyncPeriod time.Duration) *EndpointsConfig {
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result := &EndpointsConfig{
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listerSynced: endpointsInformer.Informer().HasSynced,
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}
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endpointsInformer.Informer().AddEventHandlerWithResyncPeriod(
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cache.ResourceEventHandlerFuncs{
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AddFunc: result.handleAddEndpoints,
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UpdateFunc: result.handleUpdateEndpoints,
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DeleteFunc: result.handleDeleteEndpoints,
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},
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resyncPeriod,
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)
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return result
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}
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// RegisterEventHandler registers a handler which is called on every endpoints change.
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func (c *EndpointsConfig) RegisterEventHandler(handler EndpointsHandler) {
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c.eventHandlers = append(c.eventHandlers, handler)
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}
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// Run waits for cache synced and invokes handlers after syncing.
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func (c *EndpointsConfig) Run(stopCh <-chan struct{}) {
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klog.Info("Starting endpoints config controller")
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if !cache.WaitForNamedCacheSync("endpoints config", stopCh, c.listerSynced) {
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return
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}
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for i := range c.eventHandlers {
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klog.V(3).Infof("Calling handler.OnEndpointsSynced()")
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c.eventHandlers[i].OnEndpointsSynced()
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}
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}
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func (c *EndpointsConfig) handleAddEndpoints(obj interface{}) {
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endpoints, ok := obj.(*v1.Endpoints)
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if !ok {
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utilruntime.HandleError(fmt.Errorf("unexpected object type: %v", obj))
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return
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}
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for i := range c.eventHandlers {
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klog.V(4).Infof("Calling handler.OnEndpointsAdd")
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c.eventHandlers[i].OnEndpointsAdd(endpoints)
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}
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}
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func (c *EndpointsConfig) handleUpdateEndpoints(oldObj, newObj interface{}) {
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oldEndpoints, ok := oldObj.(*v1.Endpoints)
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if !ok {
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utilruntime.HandleError(fmt.Errorf("unexpected object type: %v", oldObj))
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return
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}
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endpoints, ok := newObj.(*v1.Endpoints)
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if !ok {
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utilruntime.HandleError(fmt.Errorf("unexpected object type: %v", newObj))
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return
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}
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for i := range c.eventHandlers {
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klog.V(4).Infof("Calling handler.OnEndpointsUpdate")
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c.eventHandlers[i].OnEndpointsUpdate(oldEndpoints, endpoints)
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}
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}
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func (c *EndpointsConfig) handleDeleteEndpoints(obj interface{}) {
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endpoints, ok := obj.(*v1.Endpoints)
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if !ok {
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tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
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if !ok {
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utilruntime.HandleError(fmt.Errorf("unexpected object type: %v", obj))
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return
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}
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if endpoints, ok = tombstone.Obj.(*v1.Endpoints); !ok {
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utilruntime.HandleError(fmt.Errorf("unexpected object type: %v", obj))
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return
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}
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}
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for i := range c.eventHandlers {
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klog.V(4).Infof("Calling handler.OnEndpointsDelete")
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c.eventHandlers[i].OnEndpointsDelete(endpoints)
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}
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}
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// EndpointSliceConfig tracks a set of endpoints configurations.
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type EndpointSliceConfig struct {
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listerSynced cache.InformerSynced
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eventHandlers []EndpointSliceHandler
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}
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// NewEndpointSliceConfig creates a new EndpointSliceConfig.
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func NewEndpointSliceConfig(endpointSliceInformer discoveryinformers.EndpointSliceInformer, resyncPeriod time.Duration) *EndpointSliceConfig {
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result := &EndpointSliceConfig{
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listerSynced: endpointSliceInformer.Informer().HasSynced,
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}
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endpointSliceInformer.Informer().AddEventHandlerWithResyncPeriod(
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cache.ResourceEventHandlerFuncs{
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AddFunc: result.handleAddEndpointSlice,
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UpdateFunc: result.handleUpdateEndpointSlice,
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DeleteFunc: result.handleDeleteEndpointSlice,
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},
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resyncPeriod,
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)
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return result
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}
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// RegisterEventHandler registers a handler which is called on every endpoint slice change.
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func (c *EndpointSliceConfig) RegisterEventHandler(handler EndpointSliceHandler) {
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c.eventHandlers = append(c.eventHandlers, handler)
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}
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// Run waits for cache synced and invokes handlers after syncing.
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func (c *EndpointSliceConfig) Run(stopCh <-chan struct{}) {
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klog.Info("Starting endpoint slice config controller")
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if !cache.WaitForNamedCacheSync("endpoint slice config", stopCh, c.listerSynced) {
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return
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}
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for _, h := range c.eventHandlers {
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klog.V(3).Infof("Calling handler.OnEndpointSlicesSynced()")
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h.OnEndpointSlicesSynced()
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}
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}
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func (c *EndpointSliceConfig) handleAddEndpointSlice(obj interface{}) {
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endpointSlice, ok := obj.(*discovery.EndpointSlice)
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if !ok {
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utilruntime.HandleError(fmt.Errorf("unexpected object type: %T", obj))
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return
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}
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for _, h := range c.eventHandlers {
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klog.V(4).Infof("Calling handler.OnEndpointSliceAdd %+v", endpointSlice)
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h.OnEndpointSliceAdd(endpointSlice)
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}
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}
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func (c *EndpointSliceConfig) handleUpdateEndpointSlice(oldObj, newObj interface{}) {
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oldEndpointSlice, ok := oldObj.(*discovery.EndpointSlice)
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if !ok {
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utilruntime.HandleError(fmt.Errorf("unexpected object type: %T", newObj))
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return
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}
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newEndpointSlice, ok := newObj.(*discovery.EndpointSlice)
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if !ok {
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utilruntime.HandleError(fmt.Errorf("unexpected object type: %T", newObj))
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return
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}
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for _, h := range c.eventHandlers {
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klog.V(4).Infof("Calling handler.OnEndpointSliceUpdate")
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h.OnEndpointSliceUpdate(oldEndpointSlice, newEndpointSlice)
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}
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}
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func (c *EndpointSliceConfig) handleDeleteEndpointSlice(obj interface{}) {
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endpointSlice, ok := obj.(*discovery.EndpointSlice)
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if !ok {
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tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
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if !ok {
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utilruntime.HandleError(fmt.Errorf("unexpected object type: %T", obj))
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return
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}
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if endpointSlice, ok = tombstone.Obj.(*discovery.EndpointSlice); !ok {
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utilruntime.HandleError(fmt.Errorf("unexpected object type: %T", obj))
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return
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}
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}
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for _, h := range c.eventHandlers {
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klog.V(4).Infof("Calling handler.OnEndpointsDelete")
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h.OnEndpointSliceDelete(endpointSlice)
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}
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}
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// ServiceConfig tracks a set of service configurations.
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type ServiceConfig struct {
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listerSynced cache.InformerSynced
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eventHandlers []ServiceHandler
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}
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// NewServiceConfig creates a new ServiceConfig.
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func NewServiceConfig(serviceInformer coreinformers.ServiceInformer, resyncPeriod time.Duration) *ServiceConfig {
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result := &ServiceConfig{
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listerSynced: serviceInformer.Informer().HasSynced,
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}
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serviceInformer.Informer().AddEventHandlerWithResyncPeriod(
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cache.ResourceEventHandlerFuncs{
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AddFunc: result.handleAddService,
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UpdateFunc: result.handleUpdateService,
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DeleteFunc: result.handleDeleteService,
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},
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resyncPeriod,
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)
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return result
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}
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// RegisterEventHandler registers a handler which is called on every service change.
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func (c *ServiceConfig) RegisterEventHandler(handler ServiceHandler) {
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c.eventHandlers = append(c.eventHandlers, handler)
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}
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// Run waits for cache synced and invokes handlers after syncing.
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func (c *ServiceConfig) Run(stopCh <-chan struct{}) {
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klog.Info("Starting service config controller")
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if !cache.WaitForNamedCacheSync("service config", stopCh, c.listerSynced) {
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return
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}
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for i := range c.eventHandlers {
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klog.V(3).Info("Calling handler.OnServiceSynced()")
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c.eventHandlers[i].OnServiceSynced()
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}
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}
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func (c *ServiceConfig) handleAddService(obj interface{}) {
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service, ok := obj.(*v1.Service)
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if !ok {
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utilruntime.HandleError(fmt.Errorf("unexpected object type: %v", obj))
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return
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}
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for i := range c.eventHandlers {
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klog.V(4).Info("Calling handler.OnServiceAdd")
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c.eventHandlers[i].OnServiceAdd(service)
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}
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}
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func (c *ServiceConfig) handleUpdateService(oldObj, newObj interface{}) {
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oldService, ok := oldObj.(*v1.Service)
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if !ok {
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utilruntime.HandleError(fmt.Errorf("unexpected object type: %v", oldObj))
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return
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}
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service, ok := newObj.(*v1.Service)
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if !ok {
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utilruntime.HandleError(fmt.Errorf("unexpected object type: %v", newObj))
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return
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}
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for i := range c.eventHandlers {
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klog.V(4).Info("Calling handler.OnServiceUpdate")
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c.eventHandlers[i].OnServiceUpdate(oldService, service)
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}
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}
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func (c *ServiceConfig) handleDeleteService(obj interface{}) {
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service, ok := obj.(*v1.Service)
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if !ok {
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tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
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if !ok {
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utilruntime.HandleError(fmt.Errorf("unexpected object type: %v", obj))
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return
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}
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if service, ok = tombstone.Obj.(*v1.Service); !ok {
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utilruntime.HandleError(fmt.Errorf("unexpected object type: %v", obj))
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return
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}
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}
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for i := range c.eventHandlers {
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klog.V(4).Info("Calling handler.OnServiceDelete")
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c.eventHandlers[i].OnServiceDelete(service)
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}
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}
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// NodeHandler is an abstract interface of objects which receive
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// notifications about node object changes.
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type NodeHandler interface {
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// OnNodeAdd is called whenever creation of new node object
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// is observed.
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OnNodeAdd(node *v1.Node)
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// OnNodeUpdate is called whenever modification of an existing
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// node object is observed.
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OnNodeUpdate(oldNode, node *v1.Node)
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// OnNodeDelete is called whever deletion of an existing node
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// object is observed.
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OnNodeDelete(node *v1.Node)
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// OnNodeSynced is called once all the initial event handlers were
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// called and the state is fully propagated to local cache.
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OnNodeSynced()
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}
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// NoopNodeHandler is a noop handler for proxiers that have not yet
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// implemented a full NodeHandler.
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type NoopNodeHandler struct{}
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// OnNodeAdd is a noop handler for Node creates.
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func (*NoopNodeHandler) OnNodeAdd(node *v1.Node) {}
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// OnNodeUpdate is a noop handler for Node updates.
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func (*NoopNodeHandler) OnNodeUpdate(oldNode, node *v1.Node) {}
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// OnNodeDelete is a noop handler for Node deletes.
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func (*NoopNodeHandler) OnNodeDelete(node *v1.Node) {}
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// OnNodeSynced is a noop handler for Node syncs.
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func (*NoopNodeHandler) OnNodeSynced() {}
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var _ NodeHandler = &NoopNodeHandler{}
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// NodeConfig tracks a set of node configurations.
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// It accepts "set", "add" and "remove" operations of node via channels, and invokes registered handlers on change.
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type NodeConfig struct {
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listerSynced cache.InformerSynced
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eventHandlers []NodeHandler
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}
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// NewNodeConfig creates a new NodeConfig.
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func NewNodeConfig(nodeInformer coreinformers.NodeInformer, resyncPeriod time.Duration) *NodeConfig {
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result := &NodeConfig{
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listerSynced: nodeInformer.Informer().HasSynced,
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}
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nodeInformer.Informer().AddEventHandlerWithResyncPeriod(
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cache.ResourceEventHandlerFuncs{
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AddFunc: result.handleAddNode,
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UpdateFunc: result.handleUpdateNode,
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DeleteFunc: result.handleDeleteNode,
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},
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resyncPeriod,
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)
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return result
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}
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// RegisterEventHandler registers a handler which is called on every node change.
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func (c *NodeConfig) RegisterEventHandler(handler NodeHandler) {
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c.eventHandlers = append(c.eventHandlers, handler)
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}
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// Run starts the goroutine responsible for calling registered handlers.
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func (c *NodeConfig) Run(stopCh <-chan struct{}) {
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klog.Info("Starting node config controller")
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if !cache.WaitForNamedCacheSync("node config", stopCh, c.listerSynced) {
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return
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}
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for i := range c.eventHandlers {
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klog.V(3).Infof("Calling handler.OnNodeSynced()")
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c.eventHandlers[i].OnNodeSynced()
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}
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}
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func (c *NodeConfig) handleAddNode(obj interface{}) {
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node, ok := obj.(*v1.Node)
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if !ok {
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utilruntime.HandleError(fmt.Errorf("unexpected object type: %v", obj))
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return
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}
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for i := range c.eventHandlers {
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klog.V(4).Infof("Calling handler.OnNodeAdd")
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c.eventHandlers[i].OnNodeAdd(node)
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}
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}
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func (c *NodeConfig) handleUpdateNode(oldObj, newObj interface{}) {
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oldNode, ok := oldObj.(*v1.Node)
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if !ok {
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utilruntime.HandleError(fmt.Errorf("unexpected object type: %v", oldObj))
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return
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}
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node, ok := newObj.(*v1.Node)
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if !ok {
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utilruntime.HandleError(fmt.Errorf("unexpected object type: %v", newObj))
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return
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}
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for i := range c.eventHandlers {
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klog.V(5).Infof("Calling handler.OnNodeUpdate")
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c.eventHandlers[i].OnNodeUpdate(oldNode, node)
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}
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}
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func (c *NodeConfig) handleDeleteNode(obj interface{}) {
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node, ok := obj.(*v1.Node)
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if !ok {
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tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
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if !ok {
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utilruntime.HandleError(fmt.Errorf("unexpected object type: %v", obj))
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return
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}
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if node, ok = tombstone.Obj.(*v1.Node); !ok {
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utilruntime.HandleError(fmt.Errorf("unexpected object type: %v", obj))
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return
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}
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}
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for i := range c.eventHandlers {
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klog.V(4).Infof("Calling handler.OnNodeDelete")
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c.eventHandlers[i].OnNodeDelete(node)
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}
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}
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