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Ansible operator: Adding support for event filtering via predicates
Event filtering will allow Ansible operator to skip reconciles that are not required Fixes operator-framework#1968
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| // Copyright 2019 The Operator-SDK 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. | ||
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| package predicates | ||
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| import ( | ||
| "reflect" | ||
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| "k8s.io/apimachinery/pkg/apis/meta/v1/unstructured" | ||
| "sigs.k8s.io/controller-runtime/pkg/event" | ||
| logf "sigs.k8s.io/controller-runtime/pkg/log" | ||
| crtpredicate "sigs.k8s.io/controller-runtime/pkg/predicate" | ||
| ) | ||
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| var log = logf.Log.WithName("predicates") | ||
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| // PredicateFuncs returns functions defined for filtering events | ||
| func PredicateFuncs() crtpredicate.Funcs { | ||
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| dependentPredicate := crtpredicate.Funcs{ | ||
| // We don't need to reconcile dependent resource creation events | ||
| // because dependent resources are only ever created during | ||
| // reconciliation. Another reconcile would be redundant. | ||
| CreateFunc: func(e event.CreateEvent) bool { | ||
| o := e.Object.(*unstructured.Unstructured) | ||
| log.V(1).Info("Skipping reconciliation for dependent resource creation", "name", o.GetName(), "namespace", o.GetNamespace(), "apiVersion", o.GroupVersionKind().GroupVersion(), "kind", o.GroupVersionKind().Kind) | ||
| return false | ||
| }, | ||
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| // Reconcile when a dependent resource is deleted so that it can be | ||
| // recreated. | ||
| DeleteFunc: func(e event.DeleteEvent) bool { | ||
| o := e.Object.(*unstructured.Unstructured) | ||
| log.V(1).Info("Reconciling due to dependent resource deletion", "name", o.GetName(), "namespace", o.GetNamespace(), "apiVersion", o.GroupVersionKind().GroupVersion(), "kind", o.GroupVersionKind().Kind) | ||
| return true | ||
| }, | ||
|
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| // Don't reconcile when a generic event is received for a dependent | ||
| GenericFunc: func(e event.GenericEvent) bool { | ||
| o := e.Object.(*unstructured.Unstructured) | ||
| log.V(1).Info("Skipping reconcile due to generic event", "name", o.GetName(), "namespace", o.GetNamespace(), "apiVersion", o.GroupVersionKind().GroupVersion(), "kind", o.GroupVersionKind().Kind) | ||
| return false | ||
| }, | ||
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| // Reconcile when a dependent resource is updated, so that it can | ||
| // be patched back to the resource managed by the CR, if | ||
| // necessary. Ignore updates that only change the status and | ||
| // resourceVersion. | ||
| UpdateFunc: func(e event.UpdateEvent) bool { | ||
| old := e.ObjectOld.(*unstructured.Unstructured).DeepCopy() | ||
| new := e.ObjectNew.(*unstructured.Unstructured).DeepCopy() | ||
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| delete(old.Object, "status") | ||
| delete(new.Object, "status") | ||
| old.SetResourceVersion("") | ||
| new.SetResourceVersion("") | ||
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| if reflect.DeepEqual(old.Object, new.Object) { | ||
| return false | ||
| } | ||
| log.V(1).Info("Reconciling due to dependent resource update", "name", new.GetName(), "namespace", new.GetNamespace(), "apiVersion", new.GroupVersionKind().GroupVersion(), "kind", new.GroupVersionKind().Kind) | ||
| return true | ||
| }, | ||
| } | ||
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| return dependentPredicate | ||
| } |