241 lines
8.1 KiB
Go
241 lines
8.1 KiB
Go
package certificates
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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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corev1 "k8s.io/api/core/v1"
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k8sErrors "k8s.io/apimachinery/pkg/api/errors"
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"k8s.io/apimachinery/pkg/util/runtime"
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"k8s.io/apimachinery/pkg/util/wait"
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coreinformers "k8s.io/client-go/informers/core/v1"
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extinformers "k8s.io/client-go/informers/extensions/v1beta1"
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"k8s.io/client-go/kubernetes"
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corelisters "k8s.io/client-go/listers/core/v1"
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extlisters "k8s.io/client-go/listers/extensions/v1beta1"
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"k8s.io/client-go/tools/cache"
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"k8s.io/client-go/tools/record"
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"k8s.io/client-go/util/workqueue"
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clientset "github.com/jetstack/cert-manager/pkg/client/clientset/versioned"
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cminformers "github.com/jetstack/cert-manager/pkg/client/informers/externalversions/certmanager/v1alpha1"
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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/issuer"
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"github.com/jetstack/cert-manager/pkg/scheduler"
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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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client kubernetes.Interface
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cmClient clientset.Interface
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issuerFactory issuer.Factory
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recorder record.EventRecorder
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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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issuerLister cmlisters.IssuerLister
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clusterIssuerLister cmlisters.ClusterIssuerLister
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certificateLister cmlisters.CertificateLister
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secretLister corelisters.SecretLister
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ingressLister extlisters.IngressLister
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queue workqueue.RateLimitingInterface
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scheduledWorkQueue scheduler.ScheduledWorkQueue
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workerWg sync.WaitGroup
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syncedFuncs []cache.InformerSynced
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}
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// New returns a new Certificates controller. It sets up the informer handler
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// functions for all the types it watches.
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func New(
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certificatesInformer cminformers.CertificateInformer,
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issuersInformer cminformers.IssuerInformer,
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clusterIssuersInformer cminformers.ClusterIssuerInformer,
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secretsInformer coreinformers.SecretInformer,
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ingressInformer extinformers.IngressInformer,
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podsInformer coreinformers.PodInformer,
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serviceInformer coreinformers.ServiceInformer,
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client kubernetes.Interface,
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cmClient clientset.Interface,
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issuerFactory issuer.Factory,
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recorder record.EventRecorder,
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) *Controller {
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ctrl := &Controller{client: client, cmClient: cmClient, issuerFactory: issuerFactory, recorder: recorder}
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ctrl.syncHandler = ctrl.processNextWorkItem
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ctrl.queue = workqueue.NewNamedRateLimitingQueue(workqueue.NewItemExponentialFailureRateLimiter(time.Second*2, time.Minute*1), "certificates")
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// Create a scheduled work queue that calls the ctrl.queue.Add method for
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// each object in the queue. This is used to schedule re-checks of
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// Certificate resources when they get near to expiry
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ctrl.scheduledWorkQueue = scheduler.NewScheduledWorkQueue(ctrl.queue.AddRateLimited)
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certificatesInformer.Informer().AddEventHandler(&controllerpkg.QueuingEventHandler{Queue: ctrl.queue})
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ctrl.certificateLister = certificatesInformer.Lister()
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ctrl.syncedFuncs = append(ctrl.syncedFuncs, certificatesInformer.Informer().HasSynced)
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ctrl.issuerLister = issuersInformer.Lister()
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ctrl.syncedFuncs = append(ctrl.syncedFuncs, issuersInformer.Informer().HasSynced)
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// clusterIssuersInformer may be nil if cert-manager is scoped to a single
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// namespace
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if clusterIssuersInformer != nil {
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ctrl.clusterIssuerLister = clusterIssuersInformer.Lister()
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ctrl.syncedFuncs = append(ctrl.syncedFuncs, clusterIssuersInformer.Informer().HasSynced)
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}
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secretsInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
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DeleteFunc: ctrl.secretDeleted,
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})
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ctrl.secretLister = secretsInformer.Lister()
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ctrl.syncedFuncs = append(ctrl.syncedFuncs, secretsInformer.Informer().HasSynced)
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ctrl.ingressLister = ingressInformer.Lister()
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ctrl.syncedFuncs = append(ctrl.syncedFuncs, ingressInformer.Informer().HasSynced)
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// We also add pod and service informers to the list of informers to sync.
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// They are not actually used directly by the Certificates controller,
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// however the ACME HTTP challenge solver *does* require a Pod and Secret
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// lister, and due to the way the instantiation of issuers is performed it
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// is far more performant to perform the sync here.
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// We should consider moving this into pkg/issuer/acme at some point, some how.
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ctrl.syncedFuncs = append(ctrl.syncedFuncs, podsInformer.Informer().HasSynced)
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ctrl.syncedFuncs = append(ctrl.syncedFuncs, serviceInformer.Informer().HasSynced)
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return ctrl
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}
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// TODO: replace with generic handleObjet function (like Navigator)
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func (c *Controller) secretDeleted(obj interface{}) {
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var secret *corev1.Secret
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var ok bool
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secret, ok = obj.(*corev1.Secret)
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if !ok {
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runtime.HandleError(fmt.Errorf("Object is not a Secret object %#v", obj))
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return
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}
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crts, err := c.certificatesForSecret(secret)
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if err != nil {
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runtime.HandleError(fmt.Errorf("Error looking up Certificates observing Secret: %s/%s", secret.Namespace, secret.Name))
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return
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}
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for _, crt := range crts {
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key, err := keyFunc(crt)
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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.AddRateLimited(key)
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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 to sync
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if !cache.WaitForCacheSync(stopCh, c.syncedFuncs...) {
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return fmt.Errorf("error waiting for informer caches to sync")
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}
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glog.V(4).Infof("Synced all caches for %s control loop", ControllerName)
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for i := 0; i < workers; i++ {
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c.workerWg.Add(1)
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// TODO (@munnerz): make time.Second duration configurable
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go wait.Until(func() { c.worker(stopCh) }, 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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c.workerWg.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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defer c.workerWg.Done()
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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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err := func(obj interface{}) error {
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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 nil
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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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return err
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}
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c.queue.Forget(obj)
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return nil
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}(obj)
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if 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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continue
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}
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glog.Infof("%s controller: Finished processing work item %q", ControllerName, key)
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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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crt, err := c.certificateLister.Certificates(namespace).Get(name)
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if err != nil {
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if k8sErrors.IsNotFound(err) {
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c.scheduledWorkQueue.Forget(key)
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runtime.HandleError(fmt.Errorf("certificate '%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, crt)
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}
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var keyFunc = controllerpkg.KeyFunc
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const (
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ControllerName = "certificates"
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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(
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ctx.SharedInformerFactory.Certmanager().V1alpha1().Certificates(),
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ctx.SharedInformerFactory.Certmanager().V1alpha1().Issuers(),
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ctx.SharedInformerFactory.Certmanager().V1alpha1().ClusterIssuers(),
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ctx.KubeSharedInformerFactory.Core().V1().Secrets(),
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ctx.KubeSharedInformerFactory.Extensions().V1beta1().Ingresses(),
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ctx.KubeSharedInformerFactory.Core().V1().Pods(),
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ctx.KubeSharedInformerFactory.Core().V1().Services(),
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ctx.Client,
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ctx.CMClient,
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ctx.IssuerFactory,
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ctx.Recorder,
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).Run
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})
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}
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