236 lines
8.6 KiB
Go
236 lines
8.6 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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package controller
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import (
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"fmt"
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"reflect"
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"github.com/golang/glog"
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apiv1 "k8s.io/api/core/v1"
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extensions "k8s.io/api/extensions/v1beta1"
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"k8s.io/apimachinery/pkg/fields"
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"k8s.io/apimachinery/pkg/util/runtime"
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"k8s.io/client-go/tools/cache"
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fcache "k8s.io/client-go/tools/cache/testing"
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"k8s.io/ingress-nginx/ingress"
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"k8s.io/ingress-nginx/ingress/annotations/class"
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"k8s.io/ingress-nginx/ingress/annotations/parser"
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)
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type cacheController struct {
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Ingress cache.Controller
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Endpoint cache.Controller
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Service cache.Controller
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Node cache.Controller
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Secret cache.Controller
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Configmap cache.Controller
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}
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func (c *cacheController) Run(stopCh chan struct{}) {
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go c.Ingress.Run(stopCh)
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go c.Endpoint.Run(stopCh)
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go c.Service.Run(stopCh)
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go c.Node.Run(stopCh)
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go c.Secret.Run(stopCh)
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go c.Configmap.Run(stopCh)
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// Wait for all involved caches to be synced, before processing items from the queue is started
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if !cache.WaitForCacheSync(stopCh,
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c.Ingress.HasSynced,
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c.Endpoint.HasSynced,
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c.Service.HasSynced,
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c.Node.HasSynced,
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c.Secret.HasSynced,
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c.Configmap.HasSynced,
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) {
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runtime.HandleError(fmt.Errorf("Timed out waiting for caches to sync"))
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}
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}
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func (ic *GenericController) createListers(disableNodeLister bool) (*ingress.StoreLister, *cacheController) {
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// from here to the end of the method all the code is just boilerplate
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// required to watch Ingress, Secrets, ConfigMaps and Endoints.
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// This is used to detect new content, updates or removals and act accordingly
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ingEventHandler := cache.ResourceEventHandlerFuncs{
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AddFunc: func(obj interface{}) {
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addIng := obj.(*extensions.Ingress)
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if !class.IsValid(addIng, ic.cfg.IngressClass, ic.cfg.DefaultIngressClass) {
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a, _ := parser.GetStringAnnotation(class.IngressKey, addIng)
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glog.Infof("ignoring add for ingress %v based on annotation %v with value %v", addIng.Name, class.IngressKey, a)
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return
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}
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ic.recorder.Eventf(addIng, apiv1.EventTypeNormal, "CREATE", fmt.Sprintf("Ingress %s/%s", addIng.Namespace, addIng.Name))
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ic.syncQueue.Enqueue(obj)
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},
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DeleteFunc: func(obj interface{}) {
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delIng, ok := obj.(*extensions.Ingress)
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if !ok {
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// If we reached here it means the ingress was deleted but its final state is unrecorded.
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tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
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if !ok {
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glog.Errorf("couldn't get object from tombstone %#v", obj)
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return
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}
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delIng, ok = tombstone.Obj.(*extensions.Ingress)
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if !ok {
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glog.Errorf("Tombstone contained object that is not an Ingress: %#v", obj)
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return
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}
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}
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if !class.IsValid(delIng, ic.cfg.IngressClass, ic.cfg.DefaultIngressClass) {
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glog.Infof("ignoring delete for ingress %v based on annotation %v", delIng.Name, class.IngressKey)
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return
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}
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ic.recorder.Eventf(delIng, apiv1.EventTypeNormal, "DELETE", fmt.Sprintf("Ingress %s/%s", delIng.Namespace, delIng.Name))
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ic.syncQueue.Enqueue(obj)
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},
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UpdateFunc: func(old, cur interface{}) {
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oldIng := old.(*extensions.Ingress)
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curIng := cur.(*extensions.Ingress)
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validOld := class.IsValid(oldIng, ic.cfg.IngressClass, ic.cfg.DefaultIngressClass)
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validCur := class.IsValid(curIng, ic.cfg.IngressClass, ic.cfg.DefaultIngressClass)
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if !validOld && validCur {
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glog.Infof("creating ingress %v based on annotation %v", curIng.Name, class.IngressKey)
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ic.recorder.Eventf(curIng, apiv1.EventTypeNormal, "CREATE", fmt.Sprintf("Ingress %s/%s", curIng.Namespace, curIng.Name))
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} else if validOld && !validCur {
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glog.Infof("removing ingress %v based on annotation %v", curIng.Name, class.IngressKey)
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ic.recorder.Eventf(curIng, apiv1.EventTypeNormal, "DELETE", fmt.Sprintf("Ingress %s/%s", curIng.Namespace, curIng.Name))
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} else if validCur && !reflect.DeepEqual(old, cur) {
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ic.recorder.Eventf(curIng, apiv1.EventTypeNormal, "UPDATE", fmt.Sprintf("Ingress %s/%s", curIng.Namespace, curIng.Name))
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}
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ic.syncQueue.Enqueue(cur)
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},
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}
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secrEventHandler := cache.ResourceEventHandlerFuncs{
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UpdateFunc: func(old, cur interface{}) {
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if !reflect.DeepEqual(old, cur) {
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sec := cur.(*apiv1.Secret)
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key := fmt.Sprintf("%v/%v", sec.Namespace, sec.Name)
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ic.syncSecret(key)
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}
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},
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DeleteFunc: func(obj interface{}) {
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sec, ok := obj.(*apiv1.Secret)
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if !ok {
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// If we reached here it means the secret was deleted but its final state is unrecorded.
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tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
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if !ok {
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glog.Errorf("couldn't get object from tombstone %#v", obj)
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return
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}
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sec, ok = tombstone.Obj.(*apiv1.Secret)
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if !ok {
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glog.Errorf("Tombstone contained object that is not a Secret: %#v", obj)
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return
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}
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}
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key := fmt.Sprintf("%v/%v", sec.Namespace, sec.Name)
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ic.sslCertTracker.DeleteAll(key)
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ic.syncQueue.Enqueue(key)
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},
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}
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eventHandler := cache.ResourceEventHandlerFuncs{
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AddFunc: func(obj interface{}) {
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ic.syncQueue.Enqueue(obj)
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},
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DeleteFunc: func(obj interface{}) {
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ic.syncQueue.Enqueue(obj)
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},
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UpdateFunc: func(old, cur interface{}) {
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oep := old.(*apiv1.Endpoints)
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ocur := cur.(*apiv1.Endpoints)
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if !reflect.DeepEqual(ocur.Subsets, oep.Subsets) {
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ic.syncQueue.Enqueue(cur)
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}
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},
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}
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mapEventHandler := cache.ResourceEventHandlerFuncs{
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AddFunc: func(obj interface{}) {
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upCmap := obj.(*apiv1.ConfigMap)
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mapKey := fmt.Sprintf("%s/%s", upCmap.Namespace, upCmap.Name)
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if mapKey == ic.cfg.ConfigMapName {
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glog.V(2).Infof("adding configmap %v to backend", mapKey)
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ic.cfg.Backend.SetConfig(upCmap)
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ic.setForceReload(true)
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}
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},
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UpdateFunc: func(old, cur interface{}) {
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if !reflect.DeepEqual(old, cur) {
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upCmap := cur.(*apiv1.ConfigMap)
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mapKey := fmt.Sprintf("%s/%s", upCmap.Namespace, upCmap.Name)
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if mapKey == ic.cfg.ConfigMapName {
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glog.V(2).Infof("updating configmap backend (%v)", mapKey)
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ic.cfg.Backend.SetConfig(upCmap)
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ic.setForceReload(true)
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}
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// updates to configuration configmaps can trigger an update
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if mapKey == ic.cfg.ConfigMapName || mapKey == ic.cfg.TCPConfigMapName || mapKey == ic.cfg.UDPConfigMapName {
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ic.recorder.Eventf(upCmap, apiv1.EventTypeNormal, "UPDATE", fmt.Sprintf("ConfigMap %v", mapKey))
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ic.syncQueue.Enqueue(cur)
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}
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}
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},
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}
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watchNs := apiv1.NamespaceAll
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if ic.cfg.ForceNamespaceIsolation && ic.cfg.Namespace != apiv1.NamespaceAll {
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watchNs = ic.cfg.Namespace
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}
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lister := &ingress.StoreLister{}
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controller := &cacheController{}
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lister.Ingress.Store, controller.Ingress = cache.NewInformer(
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cache.NewListWatchFromClient(ic.cfg.Client.ExtensionsV1beta1().RESTClient(), "ingresses", ic.cfg.Namespace, fields.Everything()),
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&extensions.Ingress{}, ic.cfg.ResyncPeriod, ingEventHandler)
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lister.Endpoint.Store, controller.Endpoint = cache.NewInformer(
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cache.NewListWatchFromClient(ic.cfg.Client.CoreV1().RESTClient(), "endpoints", ic.cfg.Namespace, fields.Everything()),
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&apiv1.Endpoints{}, ic.cfg.ResyncPeriod, eventHandler)
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lister.Secret.Store, controller.Secret = cache.NewInformer(
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cache.NewListWatchFromClient(ic.cfg.Client.CoreV1().RESTClient(), "secrets", watchNs, fields.Everything()),
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&apiv1.Secret{}, ic.cfg.ResyncPeriod, secrEventHandler)
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lister.ConfigMap.Store, controller.Configmap = cache.NewInformer(
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cache.NewListWatchFromClient(ic.cfg.Client.CoreV1().RESTClient(), "configmaps", watchNs, fields.Everything()),
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&apiv1.ConfigMap{}, ic.cfg.ResyncPeriod, mapEventHandler)
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lister.Service.Store, controller.Service = cache.NewInformer(
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cache.NewListWatchFromClient(ic.cfg.Client.CoreV1().RESTClient(), "services", ic.cfg.Namespace, fields.Everything()),
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&apiv1.Service{}, ic.cfg.ResyncPeriod, cache.ResourceEventHandlerFuncs{})
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var nodeListerWatcher cache.ListerWatcher
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if disableNodeLister {
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nodeListerWatcher = fcache.NewFakeControllerSource()
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} else {
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nodeListerWatcher = cache.NewListWatchFromClient(ic.cfg.Client.CoreV1().RESTClient(), "nodes", apiv1.NamespaceAll, fields.Everything())
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}
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lister.Node.Store, controller.Node = cache.NewInformer(
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nodeListerWatcher,
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&apiv1.Node{}, ic.cfg.ResyncPeriod, cache.ResourceEventHandlerFuncs{})
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return lister, controller
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}
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