forked from rook/rook
Sébastien Han
a137b31e1a
Clean and refactor code helper for controller-runtime. Implement those into the block pool controller. Signed-off-by: Sébastien Han <seb@redhat.com>
99 lines
2.9 KiB
Go
99 lines
2.9 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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"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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"k8s.io/apimachinery/pkg/api/meta"
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"k8s.io/apimachinery/pkg/runtime"
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"sigs.k8s.io/controller-runtime/pkg/client"
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)
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// contains checks if an item exists in a given list.
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func contains(list []string, s string) bool {
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for _, v := range list {
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if v == s {
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return true
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}
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}
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return false
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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(client client.Client, obj runtime.Object) 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 errors.Wrap(err, "failed to get meta information of object")
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}
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if !contains(accessor.GetFinalizers(), objectFinalizer) {
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logger.Infof("adding finalizer %q on %q", objectFinalizer, accessor.GetName())
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accessor.SetFinalizers(append(accessor.GetFinalizers(), objectFinalizer))
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// Update CR with finalizer
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if err := client.Update(context.TODO(), obj); err != nil {
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return errors.Wrapf(err, "failed to add finalizer %q on %q", objectFinalizer, accessor.GetName())
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}
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}
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return nil
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}
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// RemoveFinalizer removes a finalizer from an object
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func RemoveFinalizer(client client.Client, obj runtime.Object) 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 errors.Wrap(err, "failed to get meta information of object")
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}
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if contains(accessor.GetFinalizers(), objectFinalizer) {
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logger.Infof("removing finalizer %q on %q", objectFinalizer, accessor.GetName())
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accessor.SetFinalizers(remove(accessor.GetFinalizers(), objectFinalizer))
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if err := client.Update(context.TODO(), obj); err != nil {
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return errors.Wrapf(err, "failed to remove finalizer %q on %q", objectFinalizer, 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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