54 lines
1.6 KiB
Go
54 lines
1.6 KiB
Go
/*
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Copyright 2020 The Kubernetes Authors.
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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 common
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import (
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"fmt"
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v1 "k8s.io/api/core/v1"
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"k8s.io/client-go/tools/cache"
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)
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const (
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// PodPVCIndex is the lookup name for the index function, which is to index by pod pvcs.
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PodPVCIndex = "pod-pvc-index"
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)
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// PodPVCIndexFunc returns PVC keys for given pod
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func PodPVCIndexFunc(obj interface{}) ([]string, error) {
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pod, ok := obj.(*v1.Pod)
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if !ok {
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return []string{}, nil
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}
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keys := []string{}
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for _, podVolume := range pod.Spec.Volumes {
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if pvcSource := podVolume.VolumeSource.PersistentVolumeClaim; pvcSource != nil {
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keys = append(keys, fmt.Sprintf("%s/%s", pod.Namespace, pvcSource.ClaimName))
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}
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}
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return keys, nil
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}
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// AddIndexerIfNotPresent adds the index function with the name into the cache indexer if not present
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func AddIndexerIfNotPresent(indexer cache.Indexer, indexName string, indexFunc cache.IndexFunc) error {
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indexers := indexer.GetIndexers()
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if _, ok := indexers[indexName]; ok {
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return nil
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}
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return indexer.AddIndexers(cache.Indexers{indexName: indexFunc})
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}
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