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Merge pull request #789 from marun/unmanaged-dispatcher
Factor unmanaged dispatcher out of the managed dispatcher
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,129 @@ | ||
| /* | ||
| Copyright 2019 The Kubernetes 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 dispatch | ||
|
|
||
| import ( | ||
| "github.com/golang/glog" | ||
| "github.com/pkg/errors" | ||
|
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| apierrors "k8s.io/apimachinery/pkg/api/errors" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/apimachinery/pkg/apis/meta/v1/unstructured" | ||
| "k8s.io/apimachinery/pkg/util/runtime" | ||
|
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| "github.com/kubernetes-sigs/federation-v2/pkg/controller/util" | ||
| ) | ||
|
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| const eventTemplate = "%s %s %q in cluster %q" | ||
|
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| // UnmanagedDispatcher dispatches operations to member clusters for | ||
| // resources that are no longer managed by a federated resource. | ||
| type UnmanagedDispatcher interface { | ||
| OperationDispatcher | ||
|
|
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| Delete(clusterName string) | ||
| RemoveManagedLabel(clusterName string, clusterObj *unstructured.Unstructured) | ||
| } | ||
|
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| type unmanagedDispatcherImpl struct { | ||
| dispatcher *operationDispatcherImpl | ||
|
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| targetName util.QualifiedName | ||
| targetKind string | ||
|
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| recorder DispatchRecorder | ||
| } | ||
|
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| func NewUnmanagedDispatcher(clientAccessor clientAccessorFunc, targetKind string, targetName util.QualifiedName) UnmanagedDispatcher { | ||
| dispatcher := newOperationDispatcher(clientAccessor, nil) | ||
| return newUnmanagedDispatcher(dispatcher, nil, targetKind, targetName) | ||
| } | ||
|
|
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| func newUnmanagedDispatcher(dispatcher *operationDispatcherImpl, recorder DispatchRecorder, targetKind string, targetName util.QualifiedName) *unmanagedDispatcherImpl { | ||
| return &unmanagedDispatcherImpl{ | ||
| dispatcher: dispatcher, | ||
| targetName: targetName, | ||
| targetKind: targetKind, | ||
| recorder: recorder, | ||
| } | ||
| } | ||
|
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| func (d *unmanagedDispatcherImpl) Wait() (bool, error) { | ||
| return d.dispatcher.Wait() | ||
| } | ||
|
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| func (d *unmanagedDispatcherImpl) Delete(clusterName string) { | ||
| d.dispatcher.incrementOperationsInitiated() | ||
| const op = "delete" | ||
| const opContinuous = "Deleting" | ||
| go d.dispatcher.clusterOperation(clusterName, op, func(client util.ResourceClient) util.ReconciliationStatus { | ||
| if d.recorder == nil { | ||
| glog.V(2).Infof(eventTemplate, opContinuous, d.targetKind, d.targetName, clusterName) | ||
| } else { | ||
| d.recorder.RecordEvent(clusterName, op, opContinuous) | ||
| } | ||
|
|
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| err := client.Resources(d.targetName.Namespace).Delete(d.targetName.Name, &metav1.DeleteOptions{}) | ||
| if apierrors.IsNotFound(err) { | ||
| err = nil | ||
| } | ||
| if err != nil { | ||
| if d.recorder == nil { | ||
| wrappedErr := d.wrapOperationError(err, clusterName, op) | ||
| runtime.HandleError(wrappedErr) | ||
| } else { | ||
| d.recorder.RecordError(clusterName, op, err) | ||
| } | ||
| return util.StatusError | ||
| } | ||
| return util.StatusAllOK | ||
| }) | ||
| } | ||
|
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| func (d *unmanagedDispatcherImpl) RemoveManagedLabel(clusterName string, clusterObj *unstructured.Unstructured) { | ||
| d.dispatcher.incrementOperationsInitiated() | ||
| const op = "remove managed label from" | ||
| const opContinuous = "Removing managed label from" | ||
| go d.dispatcher.clusterOperation(clusterName, op, func(client util.ResourceClient) util.ReconciliationStatus { | ||
| if d.recorder == nil { | ||
| glog.V(2).Infof(eventTemplate, opContinuous, d.targetKind, d.targetName, clusterName) | ||
| } else { | ||
| d.recorder.RecordEvent(clusterName, op, opContinuous) | ||
| } | ||
|
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| // Avoid mutating the resource in the informer cache | ||
| updateObj := clusterObj.DeepCopy() | ||
|
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| util.RemoveManagedLabel(updateObj) | ||
|
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| _, err := client.Resources(updateObj.GetNamespace()).Update(updateObj, metav1.UpdateOptions{}) | ||
| if err != nil { | ||
| if d.recorder == nil { | ||
| wrappedErr := d.wrapOperationError(err, clusterName, op) | ||
| runtime.HandleError(wrappedErr) | ||
| } else { | ||
| d.recorder.RecordError(clusterName, op, err) | ||
| } | ||
| return util.StatusError | ||
| } | ||
| return util.StatusAllOK | ||
| }) | ||
| } | ||
|
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| func (d *unmanagedDispatcherImpl) wrapOperationError(err error, clusterName, operation string) error { | ||
| return errors.Wrapf(err, "Failed to "+eventTemplate, operation, d.targetKind, d.targetName, clusterName) | ||
| } |