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| 1 | +/* |
| 2 | +Copyright 2025 Flant JSC |
| 3 | +
|
| 4 | +Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | +you may not use this file except in compliance with the License. |
| 6 | +You may obtain a copy of the License at |
| 7 | +
|
| 8 | + http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | +
|
| 10 | +Unless required by applicable law or agreed to in writing, software |
| 11 | +distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | +See the License for the specific language governing permissions and |
| 14 | +limitations under the License. |
| 15 | +*/ |
| 16 | + |
| 17 | +package hooks_common |
| 18 | + |
| 19 | +import ( |
| 20 | + "context" |
| 21 | + "errors" |
| 22 | + "fmt" |
| 23 | + |
| 24 | + snapv1 "github.com/kubernetes-csi/external-snapshotter/client/v8/apis/volumesnapshot/v1" |
| 25 | + admissionregistrationv1 "k8s.io/api/admissionregistration/v1" |
| 26 | + corev1 "k8s.io/api/core/v1" |
| 27 | + v1 "k8s.io/api/core/v1" |
| 28 | + storagev1 "k8s.io/api/storage/v1" |
| 29 | + sv1 "k8s.io/api/storage/v1" |
| 30 | + extv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1" |
| 31 | + "k8s.io/apimachinery/pkg/apis/meta/v1/unstructured" |
| 32 | + "k8s.io/apimachinery/pkg/runtime/schema" |
| 33 | + clientgoscheme "k8s.io/client-go/kubernetes/scheme" |
| 34 | + "sigs.k8s.io/controller-runtime/pkg/client" |
| 35 | + |
| 36 | + "github.com/deckhouse/snapshot-controller/hooks/go/consts" |
| 37 | + "github.com/deckhouse/module-sdk/pkg" |
| 38 | + "github.com/deckhouse/module-sdk/pkg/registry" |
| 39 | + "github.com/deckhouse/sds-common-lib/kubeclient" |
| 40 | +) |
| 41 | + |
| 42 | +const hookName = "remove-finalizers-on-module-delete" |
| 43 | + |
| 44 | +func removeFinalizersFromObject(ctx context.Context, cl client.Client, obj client.Object, logger pkg.Logger) error { |
| 45 | + logger.Info(fmt.Sprintf("[%s]: Removing finalizers from %s %s", hookName, obj.GetObjectKind().GroupVersionKind().Kind, obj.GetName())) |
| 46 | + |
| 47 | + patch := client.MergeFrom(obj.DeepCopyObject().(client.Object)) |
| 48 | + obj.SetFinalizers(nil) |
| 49 | + |
| 50 | + if err := cl.Patch(ctx, obj, patch); err != nil { |
| 51 | + return fmt.Errorf("failed to patch %s %s: %w", obj.GetObjectKind().GroupVersionKind().Kind, obj.GetName(), err) |
| 52 | + } |
| 53 | + return nil |
| 54 | +} |
| 55 | + |
| 56 | +var _ = registry.RegisterFunc(configRemoveFinalizersOnModuleDelete, handlerRemoveFinalizersOnModuleDelete) |
| 57 | + |
| 58 | +var configRemoveFinalizersOnModuleDelete = &pkg.HookConfig{ |
| 59 | + OnAfterDeleteHelm: &pkg.OrderedConfig{Order: 10}, |
| 60 | +} |
| 61 | + |
| 62 | +func handlerRemoveFinalizersOnModuleDelete(ctx context.Context, input *pkg.HookInput) error { |
| 63 | + input.Logger.Info(fmt.Sprintf("[%s]: Started removing finalizers on module delete", hookName)) |
| 64 | + var resultErr error |
| 65 | + |
| 66 | + cl, err := kubeclient.New( |
| 67 | + admissionregistrationv1.AddToScheme, |
| 68 | + clientgoscheme.AddToScheme, |
| 69 | + extv1.AddToScheme, |
| 70 | + v1.AddToScheme, |
| 71 | + sv1.AddToScheme, |
| 72 | + snapv1.AddToScheme) |
| 73 | + if err != nil { |
| 74 | + return fmt.Errorf("failed to initialize kube client: %w", err) |
| 75 | + } |
| 76 | + |
| 77 | + // Remove finalizers from Secrets in module namespace |
| 78 | + secretList := &corev1.SecretList{} |
| 79 | + if err := cl.List(ctx, secretList, client.InNamespace(consts.ModuleNamespace)); err != nil { |
| 80 | + resultErr = errors.Join(resultErr, fmt.Errorf("[%s]: failed to list secrets: %w", hookName, err)) |
| 81 | + } else { |
| 82 | + for i := range secretList.Items { |
| 83 | + if err := removeFinalizersFromObject(ctx, cl, &secretList.Items[i], input.Logger); err != nil { |
| 84 | + resultErr = errors.Join(resultErr, err) |
| 85 | + } |
| 86 | + } |
| 87 | + } |
| 88 | + |
| 89 | + // Remove finalizers from ConfigMaps in module namespace |
| 90 | + configMapList := &corev1.ConfigMapList{} |
| 91 | + if err := cl.List(ctx, configMapList, client.InNamespace(consts.ModuleNamespace)); err != nil { |
| 92 | + resultErr = errors.Join(resultErr, fmt.Errorf("[%s]: failed to list configmaps: %w", hookName, err)) |
| 93 | + } else { |
| 94 | + for i := range configMapList.Items { |
| 95 | + if err := removeFinalizersFromObject(ctx, cl, &configMapList.Items[i], input.Logger); err != nil { |
| 96 | + resultErr = errors.Join(resultErr, err) |
| 97 | + } |
| 98 | + } |
| 99 | + } |
| 100 | + |
| 101 | + // Delete ValidatingWebhookConfigurations if configured |
| 102 | + for _, name := range consts.WebhookConfigurationsToDelete { |
| 103 | + vwc := &admissionregistrationv1.ValidatingWebhookConfiguration{} |
| 104 | + if err := cl.Get(ctx, client.ObjectKey{Name: name}, vwc); err == nil { |
| 105 | + input.Logger.Info(fmt.Sprintf("[%s]: Deleting ValidatingWebhookConfiguration %s", hookName, name)) |
| 106 | + if err := cl.Delete(ctx, vwc); err != nil { |
| 107 | + resultErr = errors.Join(resultErr, fmt.Errorf("[%s]: failed to delete ValidatingWebhookConfiguration %s: %w", hookName, name, err)) |
| 108 | + } |
| 109 | + } |
| 110 | + } |
| 111 | + |
| 112 | + // Remove finalizers from StorageClass if controller creates them |
| 113 | + for _, provisioner := range consts.AllowedProvisioners { |
| 114 | + scList := &storagev1.StorageClassList{} |
| 115 | + if err := cl.List(ctx, scList); err != nil { |
| 116 | + resultErr = errors.Join(resultErr, fmt.Errorf("[%s]: failed to list storage classes: %w", hookName, err)) |
| 117 | + break |
| 118 | + } |
| 119 | + for i := range scList.Items { |
| 120 | + if scList.Items[i].Provisioner != provisioner { |
| 121 | + continue |
| 122 | + } |
| 123 | + if err := removeFinalizersFromObject(ctx, cl, &scList.Items[i], input.Logger); err != nil { |
| 124 | + resultErr = errors.Join(resultErr, err) |
| 125 | + } |
| 126 | + } |
| 127 | + } |
| 128 | + |
| 129 | + // Remove finalizers from CRs from module's crd folder |
| 130 | + for _, crgvk := range consts.CRGVKsForFinalizerRemoval { |
| 131 | + ns := "" |
| 132 | + if crgvk.Namespaced { |
| 133 | + ns = consts.ModuleNamespace |
| 134 | + } |
| 135 | + crList := &unstructured.UnstructuredList{} |
| 136 | + crList.SetGroupVersionKind(schema.GroupVersionKind{ |
| 137 | + Group: crgvk.Group, |
| 138 | + Version: crgvk.Version, |
| 139 | + Kind: crgvk.Kind + "List", |
| 140 | + }) |
| 141 | + if err := cl.List(ctx, crList, client.InNamespace(ns)); err != nil { |
| 142 | + input.Logger.Info(fmt.Sprintf("[%s]: skipping CR %s (may not exist): %v", hookName, crgvk.Kind, err)) |
| 143 | + continue |
| 144 | + } |
| 145 | + for i := range crList.Items { |
| 146 | + cr := &crList.Items[i] |
| 147 | + if len(cr.GetFinalizers()) == 0 { |
| 148 | + continue |
| 149 | + } |
| 150 | + if err := removeFinalizersFromObject(ctx, cl, cr, input.Logger); err != nil { |
| 151 | + resultErr = errors.Join(resultErr, err) |
| 152 | + } |
| 153 | + } |
| 154 | + } |
| 155 | + |
| 156 | + input.Logger.Info(fmt.Sprintf("[%s]: Finished removing finalizers on module delete", hookName)) |
| 157 | + return resultErr |
| 158 | +} |
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