228 lines
7.3 KiB
Go
228 lines
7.3 KiB
Go
/*
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Copyright 2019 The Jetstack cert-manager contributors.
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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 acmeorders
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import (
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"context"
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"fmt"
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"sync"
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"time"
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"github.com/golang/glog"
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k8sErrors "k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apimachinery/pkg/util/runtime"
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"k8s.io/apimachinery/pkg/util/wait"
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corelisters "k8s.io/client-go/listers/core/v1"
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"k8s.io/client-go/tools/cache"
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"k8s.io/client-go/util/workqueue"
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"k8s.io/utils/clock"
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"github.com/jetstack/cert-manager/pkg/acme"
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cmlisters "github.com/jetstack/cert-manager/pkg/client/listers/certmanager/v1alpha1"
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controllerpkg "github.com/jetstack/cert-manager/pkg/controller"
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"github.com/jetstack/cert-manager/pkg/util"
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)
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type Controller struct {
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controllerpkg.Context
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helper controllerpkg.Helper
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acmeHelper acme.Helper
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// To allow injection for testing.
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syncHandler func(ctx context.Context, key string) error
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orderLister cmlisters.OrderLister
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challengeLister cmlisters.ChallengeLister
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issuerLister cmlisters.IssuerLister
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clusterIssuerLister cmlisters.ClusterIssuerLister
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secretLister corelisters.SecretLister
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watchedInformers []cache.InformerSynced
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queue workqueue.RateLimitingInterface
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// used for testing
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clock clock.Clock
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}
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func New(ctx *controllerpkg.Context) *Controller {
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ctrl := &Controller{Context: *ctx}
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ctrl.syncHandler = ctrl.processNextWorkItem
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ctrl.queue = workqueue.NewNamedRateLimitingQueue(controllerpkg.DefaultItemBasedRateLimiter(), "orders")
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orderInformer := ctrl.SharedInformerFactory.Certmanager().V1alpha1().Orders()
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orderInformer.Informer().AddEventHandler(&controllerpkg.QueuingEventHandler{Queue: ctrl.queue})
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ctrl.watchedInformers = append(ctrl.watchedInformers, orderInformer.Informer().HasSynced)
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ctrl.orderLister = orderInformer.Lister()
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issuerInformer := ctrl.SharedInformerFactory.Certmanager().V1alpha1().Issuers()
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issuerInformer.Informer().AddEventHandler(&controllerpkg.BlockingEventHandler{WorkFunc: ctrl.handleGenericIssuer})
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ctrl.watchedInformers = append(ctrl.watchedInformers, issuerInformer.Informer().HasSynced)
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ctrl.issuerLister = issuerInformer.Lister()
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if ctx.Namespace == "" {
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clusterIssuerInformer := ctrl.SharedInformerFactory.Certmanager().V1alpha1().ClusterIssuers()
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clusterIssuerInformer.Informer().AddEventHandler(&controllerpkg.BlockingEventHandler{WorkFunc: ctrl.handleGenericIssuer})
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ctrl.watchedInformers = append(ctrl.watchedInformers, clusterIssuerInformer.Informer().HasSynced)
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ctrl.clusterIssuerLister = clusterIssuerInformer.Lister()
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}
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challengeInformer := ctrl.SharedInformerFactory.Certmanager().V1alpha1().Challenges()
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challengeInformer.Informer().AddEventHandler(&controllerpkg.BlockingEventHandler{WorkFunc: ctrl.handleOwnedResource})
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ctrl.watchedInformers = append(ctrl.watchedInformers, challengeInformer.Informer().HasSynced)
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ctrl.challengeLister = challengeInformer.Lister()
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// TODO: detect changes to secrets referenced by order's issuers.
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secretInformer := ctrl.KubeSharedInformerFactory.Core().V1().Secrets()
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ctrl.watchedInformers = append(ctrl.watchedInformers, secretInformer.Informer().HasSynced)
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ctrl.secretLister = secretInformer.Lister()
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ctrl.helper = controllerpkg.NewHelper(ctrl.issuerLister, ctrl.clusterIssuerLister)
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ctrl.acmeHelper = acme.NewHelper(ctrl.secretLister, ctrl.Context.ClusterResourceNamespace)
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ctrl.clock = clock.RealClock{}
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return ctrl
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}
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func (c *Controller) handleOwnedResource(obj interface{}) {
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metaobj, ok := obj.(metav1.Object)
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if !ok {
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glog.Errorf("item passed to handleOwnedResource does not implement ObjectMetaAccessor")
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return
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}
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ownerRefs := metaobj.GetOwnerReferences()
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for _, ref := range ownerRefs {
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// Parse the Group out of the OwnerReference to compare it to what was parsed out of the requested OwnerType
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refGV, err := schema.ParseGroupVersion(ref.APIVersion)
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if err != nil {
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glog.Errorf("Could not parse OwnerReference GroupVersion: %v", err)
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continue
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}
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if refGV.Group == orderGvk.Group && ref.Kind == orderGvk.Kind {
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// TODO: how to handle namespace of owner references?
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order, err := c.orderLister.Orders(metaobj.GetNamespace()).Get(ref.Name)
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if err != nil {
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glog.Errorf("Error getting Order %q referenced by resource %q", ref.Name, metaobj.GetName())
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continue
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}
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objKey, err := keyFunc(order)
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if err != nil {
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runtime.HandleError(err)
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continue
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}
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c.queue.Add(objKey)
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}
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}
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}
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func (c *Controller) Run(workers int, stopCh <-chan struct{}) error {
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glog.V(4).Infof("Starting %s control loop", ControllerName)
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// wait for all the informer caches we depend on are synced
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if !cache.WaitForCacheSync(stopCh, c.watchedInformers...) {
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// c.challengeInformerSynced) {
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return fmt.Errorf("error waiting for informer caches to sync")
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}
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var wg sync.WaitGroup
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for i := 0; i < workers; i++ {
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wg.Add(1)
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// TODO (@munnerz): make time.Second duration configurable
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go wait.Until(func() {
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defer wg.Done()
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c.worker(stopCh)
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},
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time.Second, stopCh)
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}
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<-stopCh
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glog.V(4).Infof("Shutting down queue as workqueue signaled shutdown")
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c.queue.ShutDown()
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glog.V(4).Infof("Waiting for workers to exit...")
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wg.Wait()
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glog.V(4).Infof("Workers exited.")
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return nil
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}
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func (c *Controller) worker(stopCh <-chan struct{}) {
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glog.V(4).Infof("Starting %q worker", ControllerName)
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for {
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obj, shutdown := c.queue.Get()
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if shutdown {
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break
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}
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var key string
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// use an inlined function so we can use defer
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func() {
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defer c.queue.Done(obj)
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var ok bool
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if key, ok = obj.(string); !ok {
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return
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}
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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ctx = util.ContextWithStopCh(ctx, stopCh)
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glog.Infof("%s controller: syncing item '%s'", ControllerName, key)
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if err := c.syncHandler(ctx, key); err != nil {
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glog.Errorf("%s controller: Re-queuing item %q due to error processing: %s", ControllerName, key, err.Error())
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c.queue.AddRateLimited(obj)
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return
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}
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glog.Infof("%s controller: Finished processing work item %q", ControllerName, key)
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c.queue.Forget(obj)
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}()
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}
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glog.V(4).Infof("Exiting %q worker loop", ControllerName)
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}
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func (c *Controller) processNextWorkItem(ctx context.Context, key string) error {
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namespace, name, err := cache.SplitMetaNamespaceKey(key)
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if err != nil {
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runtime.HandleError(fmt.Errorf("invalid resource key: %s", key))
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return nil
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}
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order, err := c.orderLister.Orders(namespace).Get(name)
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if err != nil {
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if k8sErrors.IsNotFound(err) {
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runtime.HandleError(fmt.Errorf("order '%s' in work queue no longer exists", key))
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return nil
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}
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return err
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}
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return c.Sync(ctx, order)
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}
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var keyFunc = controllerpkg.KeyFunc
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const (
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ControllerName = "orders"
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)
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func init() {
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controllerpkg.Register(ControllerName, func(ctx *controllerpkg.Context) controllerpkg.Interface {
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return New(ctx).Run
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})
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}
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