forked from rook/rook
102 lines
3.6 KiB
Go
102 lines
3.6 KiB
Go
/*
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Copyright 2020 The Rook Authors. All rights reserved.
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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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"context"
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"fmt"
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"slices"
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"strings"
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"github.com/pkg/errors"
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cephv1 "github.com/rook/rook/pkg/apis/ceph.rook.io/v1"
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"github.com/rook/rook/pkg/util/log"
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"k8s.io/apimachinery/pkg/api/meta"
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"k8s.io/apimachinery/pkg/types"
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"sigs.k8s.io/controller-runtime/pkg/client"
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)
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// remove removes any element from a list
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func remove(list []string, s string) []string {
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for i, v := range list {
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if v == s {
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list = append(list[:i], list[i+1:]...)
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}
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}
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return list
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}
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// AddFinalizerIfNotPresent adds a finalizer an object to avoid instant deletion
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// of the object without finalizing it.
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func AddFinalizerIfNotPresent(ctx context.Context, client client.Client, obj client.Object) (bool, error) {
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objectFinalizer := buildFinalizerName(obj.GetObjectKind().GroupVersionKind().Kind)
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accessor, err := meta.Accessor(obj)
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if err != nil {
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return false, errors.Wrap(err, "failed to get meta information of object")
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}
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if !slices.Contains(accessor.GetFinalizers(), objectFinalizer) {
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log.NamedInfo(NsName(obj.GetNamespace(), obj.GetName()), logger, "adding finalizer %q", objectFinalizer)
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accessor.SetFinalizers(append(accessor.GetFinalizers(), objectFinalizer))
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originalGeneration := obj.GetGeneration()
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// Update CR with finalizer
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if err := client.Update(ctx, obj); err != nil {
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return false, errors.Wrapf(err, "failed to add finalizer %q on %q", objectFinalizer, accessor.GetName())
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}
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newGeneration := obj.GetGeneration()
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log.NamedDebug(NsName(obj.GetNamespace(), obj.GetName()), logger, "when adding finalizer, original generation %d, new generation %d", originalGeneration, newGeneration)
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return originalGeneration != newGeneration, nil
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}
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return false, nil
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}
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// RemoveFinalizer removes a finalizer from an object
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func RemoveFinalizer(ctx context.Context, client client.Client, obj client.Object) error {
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finalizerName := buildFinalizerName(obj.GetObjectKind().GroupVersionKind().Kind)
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return RemoveFinalizerWithName(ctx, client, obj, finalizerName)
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}
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// RemoveFinalizerWithName removes finalizer passed as an argument from an object
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func RemoveFinalizerWithName(ctx context.Context, client client.Client, obj client.Object, finalizerName string) error {
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err := client.Get(ctx, types.NamespacedName{Name: obj.GetName(), Namespace: obj.GetNamespace()}, obj)
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if err != nil {
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return errors.Wrap(err, "failed to get the latest version of the object")
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}
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accessor, err := meta.Accessor(obj)
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if err != nil {
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return errors.Wrap(err, "failed to get meta information of object")
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}
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if slices.Contains(accessor.GetFinalizers(), finalizerName) {
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log.NamedInfo(NsName(obj.GetNamespace(), obj.GetName()), logger, "removing finalizer %q", finalizerName)
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accessor.SetFinalizers(remove(accessor.GetFinalizers(), finalizerName))
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if err := client.Update(ctx, obj); err != nil {
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return errors.Wrapf(err, "failed to remove finalizer %q on %q", finalizerName, accessor.GetName())
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}
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}
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return nil
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}
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// buildFinalizerName returns the finalizer name
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func buildFinalizerName(kind string) string {
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return fmt.Sprintf("%s.%s", strings.ToLower(kind), cephv1.CustomResourceGroup)
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}
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