mirror of https://github.com/k3s-io/k3s
93 lines
3.0 KiB
Go
93 lines
3.0 KiB
Go
/*
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Copyright 2014 The Kubernetes 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 persistent_claim
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import (
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"fmt"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/types"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/util/mount"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/volume"
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"github.com/golang/glog"
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)
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func ProbeVolumePlugins() []volume.VolumePlugin {
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return []volume.VolumePlugin{&persistentClaimPlugin{nil}}
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}
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type persistentClaimPlugin struct {
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host volume.VolumeHost
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}
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var _ volume.VolumePlugin = &persistentClaimPlugin{}
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const (
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persistentClaimPluginName = "kubernetes.io/persistent-claim"
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)
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func (plugin *persistentClaimPlugin) Init(host volume.VolumeHost) {
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plugin.host = host
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}
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func (plugin *persistentClaimPlugin) Name() string {
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return persistentClaimPluginName
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}
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func (plugin *persistentClaimPlugin) CanSupport(spec *volume.Spec) bool {
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return spec.VolumeSource.PersistentVolumeClaim != nil
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}
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func (plugin *persistentClaimPlugin) NewBuilder(spec *volume.Spec, pod *api.Pod, opts volume.VolumeOptions, mounter mount.Interface) (volume.Builder, error) {
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claim, err := plugin.host.GetKubeClient().PersistentVolumeClaims(pod.Namespace).Get(spec.VolumeSource.PersistentVolumeClaim.ClaimName)
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if err != nil {
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glog.Errorf("Error finding claim: %+v\n", spec.VolumeSource.PersistentVolumeClaim.ClaimName)
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return nil, err
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}
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if claim.Spec.VolumeName == "" {
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return nil, fmt.Errorf("The claim %+v is not yet bound to a volume", claim.Name)
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}
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pv, err := plugin.host.GetKubeClient().PersistentVolumes().Get(claim.Spec.VolumeName)
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if err != nil {
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glog.Errorf("Error finding persistent volume for claim: %+v\n", claim.Name)
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return nil, err
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}
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if pv.Spec.ClaimRef == nil {
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glog.Errorf("The volume is not yet bound to the claim. Expected to find the bind on volume.Spec.ClaimRef: %+v", pv)
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return nil, err
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}
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if pv.Spec.ClaimRef.UID != claim.UID {
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glog.Errorf("Expected volume.Spec.ClaimRef.UID %+v but have %+v", pv.Spec.ClaimRef.UID, claim.UID)
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return nil, err
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}
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builder, err := plugin.host.NewWrapperBuilder(volume.NewSpecFromPersistentVolume(pv), pod, opts, mounter)
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if err != nil {
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glog.Errorf("Error creating builder for claim: %+v\n", claim.Name)
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return nil, err
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}
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return builder, nil
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}
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func (plugin *persistentClaimPlugin) NewCleaner(_ string, _ types.UID, _ mount.Interface) (volume.Cleaner, error) {
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return nil, fmt.Errorf("This will never be called directly. The PV backing this claim has a cleaner. Kubelet uses that cleaner, not this one, when removing orphaned volumes.")
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}
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