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ensure finalizers are resilient on reconciliation
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| /* | ||
| Copyright 2023 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 framework | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "sigs.k8s.io/cluster-api/util/patch" | ||
| "time" | ||
|
|
||
| . "github.com/onsi/gomega" | ||
|
|
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| "k8s.io/apimachinery/pkg/apis/meta/v1/unstructured" | ||
| clusterctlcluster "sigs.k8s.io/cluster-api/cmd/clusterctl/client/cluster" | ||
| "sigs.k8s.io/controller-runtime/pkg/client" | ||
| ) | ||
|
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| // ValidateFinalizersResilience checks that expected finalizers are in place, deletes them, and verifies that expected finalizers are properly added again. | ||
| func ValidateFinalizersResilience(ctx context.Context, proxy ClusterProxy, namespace, clusterName string) { | ||
| // Get the initial list of finalizers | ||
| initialFinalizers := getFinalizersFromAllObjs(ctx, proxy, namespace) | ||
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| clusterKey := client.ObjectKey{Namespace: namespace, Name: clusterName} | ||
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| // Removes all the finalizers. | ||
| // We are testing the worst-case scenario, i.e. all finalizers are deleted, even when reconciliation is paused. | ||
| // Deletion of the finalizers can either happen from a system generated attack or by mistake, which is an edge case. | ||
| // The reconciliation loop should be able to recover from this, by adding the required finalizers back. | ||
| setClusterPause(ctx, proxy.GetClient(), clusterKey, true) | ||
|
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| // Once all Clusters are paused remove the finalizers from all objects in the graph. | ||
| removeFinalizers(ctx, proxy, namespace) | ||
|
|
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| // Unpause the cluster. | ||
| setClusterPause(ctx, proxy.GetClient(), clusterKey, false) | ||
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| // Annotate the clusterClass, if one is in use, to speed up reconciliation. This ensures ClusterClass finalizers | ||
| // are re-reconciled before asserting the owner reference graph. | ||
| forceClusterClassReconcile(ctx, proxy.GetClient(), clusterKey) | ||
|
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| // Check that the finalizers are as expected after further reconciliations. | ||
| assertFinalizersExist(ctx, proxy, namespace, initialFinalizers) | ||
| } | ||
|
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| func getFinalizersFromAllObjs(ctx context.Context, proxy ClusterProxy, namespace string) map[string][]string { | ||
| finalizers := map[string][]string{} | ||
| graph, err := clusterctlcluster.GetOwnerGraph(ctx, proxy.GetKubeconfigPath(), namespace) | ||
| Expect(err).To(BeNil()) | ||
| for _, v := range graph { | ||
| obj := &unstructured.Unstructured{} | ||
| obj.SetAPIVersion(v.Object.APIVersion) | ||
| obj.SetKind(v.Object.Kind) | ||
| err := proxy.GetClient().Get(ctx, client.ObjectKey{Namespace: v.Object.Namespace, Name: v.Object.Name}, obj) | ||
| Expect(err).To(BeNil()) | ||
| if obj.GetFinalizers() != nil { | ||
| finalizers[fmt.Sprintf("%s/%s", v.Object.Kind, client.ObjectKey{Name: v.Object.Name, Namespace: v.Object.Namespace}.String())] = obj.GetFinalizers() | ||
| } | ||
| } | ||
| return finalizers | ||
| } | ||
|
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| func removeFinalizers(ctx context.Context, proxy ClusterProxy, namespace string) { | ||
| graph, err := clusterctlcluster.GetOwnerGraph(ctx, namespace, proxy.GetKubeconfigPath()) | ||
| Expect(err).ToNot(HaveOccurred()) | ||
| for _, object := range graph { | ||
| ref := object.Object | ||
| obj := new(unstructured.Unstructured) | ||
| obj.SetAPIVersion(ref.APIVersion) | ||
| obj.SetKind(ref.Kind) | ||
| obj.SetName(ref.Name) | ||
|
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||
| Expect(proxy.GetClient().Get(ctx, client.ObjectKey{Namespace: namespace, Name: object.Object.Name}, obj)).To(Succeed()) | ||
| helper, err := patch.NewHelper(obj, proxy.GetClient()) | ||
| Expect(err).ToNot(HaveOccurred()) | ||
| obj.SetFinalizers([]string{}) | ||
| Expect(helper.Patch(ctx, obj)).To(Succeed()) | ||
| } | ||
| } | ||
|
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| func assertFinalizersExist(ctx context.Context, proxy ClusterProxy, namespace string, initialFinalizers map[string][]string) { | ||
| Eventually(func() { | ||
| afterDeleteFinalizers := getFinalizersFromAllObjs(ctx, proxy, namespace) | ||
|
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| missing := map[string][]string{} | ||
| for k, v := range initialFinalizers { | ||
| if _, ok := afterDeleteFinalizers[k]; !ok { | ||
| missing[k] = v | ||
| } | ||
| } | ||
| missingString := "" | ||
| for k, v := range missing { | ||
| missingString = fmt.Sprintf("%s\n%s %s", missingString, k, v) | ||
| } | ||
| Expect(len(missing)).To(Equal(0), missingString) | ||
| }).WithTimeout(5 * time.Minute).WithPolling(2 * time.Second).Should(Succeed()) | ||
| } |