ed46466b95
After a volume is unmounted from pod and worker node, cluster admin or external-provisioner might delete the disk from storage, therefore block device on the node should be cleaned up beforehand. The photon volume plugin already has same functionality. Fixes #49392
100 lines
2.6 KiB
Go
100 lines
2.6 KiB
Go
/*
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Copyright 2015 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 fc
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import (
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"os"
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"github.com/golang/glog"
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"k8s.io/kubernetes/pkg/util/mount"
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"k8s.io/kubernetes/pkg/volume"
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)
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// Abstract interface to disk operations.
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type diskManager interface {
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MakeGlobalPDName(disk fcDisk) string
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// Attaches the disk to the kubelet's host machine.
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AttachDisk(b fcDiskMounter) (string, error)
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// Detaches the disk from the kubelet's host machine.
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DetachDisk(disk fcDiskUnmounter, devName string) error
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}
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// utility to mount a disk based filesystem
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func diskSetUp(manager diskManager, b fcDiskMounter, volPath string, mounter mount.Interface, fsGroup *int64) error {
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globalPDPath := manager.MakeGlobalPDName(*b.fcDisk)
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// TODO: handle failed mounts here.
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noMnt, err := mounter.IsLikelyNotMountPoint(volPath)
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if err != nil && !os.IsNotExist(err) {
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glog.Errorf("cannot validate mountpoint: %s", volPath)
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return err
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}
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if !noMnt {
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return nil
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}
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if err := os.MkdirAll(volPath, 0750); err != nil {
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glog.Errorf("failed to mkdir:%s", volPath)
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return err
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}
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// Perform a bind mount to the full path to allow duplicate mounts of the same disk.
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options := []string{"bind"}
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if b.readOnly {
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options = append(options, "ro")
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}
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err = mounter.Mount(globalPDPath, volPath, "", options)
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if err != nil {
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glog.Errorf("failed to bind mount:%s", globalPDPath)
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return err
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}
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if !b.readOnly {
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volume.SetVolumeOwnership(&b, fsGroup)
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}
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return nil
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}
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// utility to tear down a disk based filesystem
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func diskTearDown(manager diskManager, c fcDiskUnmounter, volPath string, mounter mount.Interface) error {
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noMnt, err := mounter.IsLikelyNotMountPoint(volPath)
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if err != nil {
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glog.Errorf("cannot validate mountpoint %s", volPath)
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return err
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}
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if noMnt {
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return os.Remove(volPath)
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}
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if err := mounter.Unmount(volPath); err != nil {
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glog.Errorf("failed to unmount %s", volPath)
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return err
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}
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noMnt, mntErr := mounter.IsLikelyNotMountPoint(volPath)
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if mntErr != nil {
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glog.Errorf("isMountpoint check failed: %v", mntErr)
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return err
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}
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if noMnt {
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if err := os.Remove(volPath); err != nil {
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return err
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}
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}
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return nil
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}
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