mirror of https://github.com/k3s-io/k3s
73 lines
2.5 KiB
Go
73 lines
2.5 KiB
Go
/*
|
|
Copyright 2020 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 common
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
v1 "k8s.io/api/core/v1"
|
|
utilfeature "k8s.io/apiserver/pkg/util/feature"
|
|
"k8s.io/client-go/tools/cache"
|
|
"k8s.io/kubernetes/pkg/features"
|
|
)
|
|
|
|
const (
|
|
// PodPVCIndex is the lookup name for the index function, which is to index by pod pvcs.
|
|
PodPVCIndex = "pod-pvc-index"
|
|
)
|
|
|
|
// PodPVCIndexFunc creates an index function that returns PVC keys (=
|
|
// namespace/name) for given pod. If enabled, this includes the PVCs
|
|
// that might be created for generic ephemeral volumes.
|
|
func PodPVCIndexFunc(genericEphemeralVolumeFeatureEnabled bool) func(obj interface{}) ([]string, error) {
|
|
return func(obj interface{}) ([]string, error) {
|
|
pod, ok := obj.(*v1.Pod)
|
|
if !ok {
|
|
return []string{}, nil
|
|
}
|
|
keys := []string{}
|
|
for _, podVolume := range pod.Spec.Volumes {
|
|
claimName := ""
|
|
if pvcSource := podVolume.VolumeSource.PersistentVolumeClaim; pvcSource != nil {
|
|
claimName = pvcSource.ClaimName
|
|
}
|
|
if ephemeralSource := podVolume.VolumeSource.Ephemeral; genericEphemeralVolumeFeatureEnabled && ephemeralSource != nil {
|
|
claimName = pod.Name + "-" + podVolume.Name
|
|
}
|
|
if claimName != "" {
|
|
keys = append(keys, fmt.Sprintf("%s/%s", pod.Namespace, claimName))
|
|
}
|
|
}
|
|
return keys, nil
|
|
}
|
|
}
|
|
|
|
// AddPodPVCIndexerIfNotPresent adds the PodPVCIndexFunc with the current global setting for GenericEphemeralVolume.
|
|
func AddPodPVCIndexerIfNotPresent(indexer cache.Indexer) error {
|
|
return AddIndexerIfNotPresent(indexer, PodPVCIndex,
|
|
PodPVCIndexFunc(utilfeature.DefaultFeatureGate.Enabled(features.GenericEphemeralVolume)))
|
|
}
|
|
|
|
// AddIndexerIfNotPresent adds the index function with the name into the cache indexer if not present
|
|
func AddIndexerIfNotPresent(indexer cache.Indexer, indexName string, indexFunc cache.IndexFunc) error {
|
|
indexers := indexer.GetIndexers()
|
|
if _, ok := indexers[indexName]; ok {
|
|
return nil
|
|
}
|
|
return indexer.AddIndexers(cache.Indexers{indexName: indexFunc})
|
|
}
|