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controller.go
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controller.go
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// Copyright 2018 The vault-operator 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 operator
import (
"context"
"fmt"
"time"
api "github.com/coreos/vault-operator/pkg/apis/vault/v1alpha1"
"github.com/coreos/vault-operator/pkg/util/probe"
"github.com/sirupsen/logrus"
"k8s.io/apimachinery/pkg/fields"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/util/workqueue"
)
func (v *Vaults) run(ctx context.Context) {
source := cache.NewListWatchFromClient(
v.vaultsCRCli.VaultV1alpha1().RESTClient(),
api.VaultServicePlural,
v.namespace,
fields.Everything())
v.queue = workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "vault-operator")
v.indexer, v.informer = cache.NewIndexerInformer(source, &api.VaultService{}, 0, cache.ResourceEventHandlerFuncs{
AddFunc: v.onAddVault,
UpdateFunc: v.onUpdateVault,
DeleteFunc: v.onDeleteVault,
}, cache.Indexers{})
defer v.queue.ShutDown()
logrus.Info("starting Vaults controller")
go v.informer.Run(ctx.Done())
if !cache.WaitForCacheSync(ctx.Done(), v.informer.HasSynced) {
logrus.Error("Timed out waiting for caches to sync")
return
}
probe.SetReady()
const numWorkers = 1
for i := 0; i < numWorkers; i++ {
go wait.Until(v.runWorker, time.Second, ctx.Done())
}
<-ctx.Done()
logrus.Info("stopping Vaults controller")
}
func (v *Vaults) onAddVault(obj interface{}) {
key, err := cache.MetaNamespaceKeyFunc(obj)
if err != nil {
panic(err)
}
v.queue.Add(key)
logrus.Infof("Vault CR (%s) is created", key)
}
func (v *Vaults) onUpdateVault(oldObj, newObj interface{}) {
key, err := cache.MetaNamespaceKeyFunc(newObj)
if err != nil {
panic(err)
}
v.queue.Add(key)
}
func (v *Vaults) onDeleteVault(obj interface{}) {
vr, ok := obj.(*api.VaultService)
if !ok {
tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
if !ok {
panic(fmt.Sprintf("unknown object from Vault delete event: %#v", obj))
}
vr, ok = tombstone.Obj.(*api.VaultService)
if !ok {
panic(fmt.Sprintf("Tombstone contained object that is not a Vault: %#v", obj))
}
}
if cancel, ok := v.ctxCancels[vr.Name]; ok {
cancel()
delete(v.ctxCancels, vr.Name)
}
// IndexerInformer uses a delta queue, therefore for deletes we have to use this
// key function.
key, err := cache.DeletionHandlingMetaNamespaceKeyFunc(obj)
if err != nil {
panic(err)
}
v.queue.Add(key)
}