148 lines
3.9 KiB
Go
148 lines
3.9 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 controller
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import (
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"reflect"
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"time"
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"github.com/go-logr/logr"
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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/client-go/tools/cache"
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"k8s.io/client-go/util/workqueue"
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logf "github.com/jetstack/cert-manager/pkg/logs"
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)
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var (
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KeyFunc = cache.DeletionHandlingMetaNamespaceKeyFunc
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)
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func DefaultItemBasedRateLimiter() workqueue.RateLimiter {
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return workqueue.NewItemExponentialFailureRateLimiter(time.Second*5, time.Minute*5)
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}
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func HandleOwnedResourceNamespacedFunc(log logr.Logger, queue workqueue.RateLimitingInterface, ownerGVK schema.GroupVersionKind, get func(namespace, name string) (interface{}, error)) func(obj interface{}) {
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return func(obj interface{}) {
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log := log.WithName("handleOwnedResource")
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metaobj, ok := obj.(metav1.Object)
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if !ok {
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log.Error(nil, "item passed to handleOwnedResource does not implement metav1.Object")
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return
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}
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log = logf.WithResource(log, metaobj)
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ownerRefs := metaobj.GetOwnerReferences()
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for _, ref := range ownerRefs {
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log := log.WithValues(
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logf.RelatedResourceNamespaceKey, metaobj.GetNamespace(),
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logf.RelatedResourceNameKey, ref.Name,
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logf.RelatedResourceKindKey, ref.Kind,
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)
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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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log.Error(err, "could not parse OwnerReference GroupVersion")
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continue
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}
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if refGV.Group == ownerGVK.Group && ref.Kind == ownerGVK.Kind {
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// TODO: how to handle namespace of owner references?
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order, err := get(metaobj.GetNamespace(), ref.Name)
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if err != nil {
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log.Error(err, "error getting order referenced by resource")
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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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log.Error(err, "error computing key for resource")
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continue
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}
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queue.Add(objKey)
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}
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}
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}
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}
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// QueuingEventHandler is an implementation of cache.ResourceEventHandler that
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// simply queues objects that are added/updated/deleted.
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type QueuingEventHandler struct {
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Queue workqueue.RateLimitingInterface
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}
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func (q *QueuingEventHandler) Enqueue(obj interface{}) {
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key, err := KeyFunc(obj)
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if err != nil {
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runtime.HandleError(err)
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return
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}
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q.Queue.Add(key)
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}
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func (q *QueuingEventHandler) OnAdd(obj interface{}) {
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q.Enqueue(obj)
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}
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func (q *QueuingEventHandler) OnUpdate(old, new interface{}) {
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if reflect.DeepEqual(old, new) {
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return
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}
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q.Enqueue(new)
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}
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func (q *QueuingEventHandler) OnDelete(obj interface{}) {
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tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
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if ok {
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obj = tombstone.Obj
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}
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q.Enqueue(obj)
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}
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// BlockingEventHandler is an implementation of cache.ResourceEventHandler that
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// simply synchronously calls it's WorkFunc upon calls to OnAdd, OnUpdate or
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// OnDelete.
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type BlockingEventHandler struct {
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WorkFunc func(obj interface{})
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}
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func (b *BlockingEventHandler) Enqueue(obj interface{}) {
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b.WorkFunc(obj)
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}
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func (b *BlockingEventHandler) OnAdd(obj interface{}) {
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b.WorkFunc(obj)
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}
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func (b *BlockingEventHandler) OnUpdate(old, new interface{}) {
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if reflect.DeepEqual(old, new) {
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return
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}
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b.WorkFunc(new)
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}
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func (b *BlockingEventHandler) OnDelete(obj interface{}) {
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tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
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if ok {
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obj = tombstone.Obj
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}
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b.WorkFunc(obj)
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}
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