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Don't create mounter when reconstructing block volume

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CSI mounter will create a new directory + json for a filesystem volume,
leading to even more orphaned files/directories.
This commit is contained in:
Jan Safranek 2019-07-09 15:34:16 +02:00 committed by Masaki Kimura
parent f1d2d9d670
commit bab81b809b
2 changed files with 36 additions and 24 deletions
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55
pkg/kubelet/volumemanager/reconciler/reconciler.go
View File

@ -493,32 +493,12 @@ func (rc *reconciler) reconstructVolume(volume podVolume) (*reconstructedVolume,
uniqueVolumeName = util.GetUniqueVolumeNameFromSpecWithPod(volume.podName, plugin, volumeSpec)
}
volumeMounter, newMounterErr := plugin.NewMounter(
volumeSpec,
pod,
volumepkg.VolumeOptions{})
if newMounterErr != nil {
return nil, fmt.Errorf(
"reconstructVolume.NewMounter failed for volume %q (spec.Name: %q) pod %q (UID: %q) with: %v",
uniqueVolumeName,
volumeSpec.Name(),
volume.podName,
pod.UID,
newMounterErr)
}
// Check existence of mount point for filesystem volume or symbolic link for block volume
isExist, checkErr := rc.operationExecutor.CheckVolumeExistenceOperation(volumeSpec, volumeMounter.GetPath(), volumeSpec.Name(), rc.mounter, uniqueVolumeName, volume.podName, pod.UID, attachablePlugin)
if checkErr != nil {
return nil, checkErr
}
// If mount or symlink doesn't exist, volume reconstruction should be failed
if !isExist {
return nil, fmt.Errorf("Volume: %q is not mounted", uniqueVolumeName)
}
var volumeMapper volumepkg.BlockVolumeMapper
var volumeMounter volumepkg.Mounter
// Path to the mount or block device to check
var checkPath string
// TODO: remove feature gate check after no longer needed
var volumeMapper volumepkg.BlockVolumeMapper
if utilfeature.DefaultFeatureGate.Enabled(features.BlockVolume) && volume.volumeMode == v1.PersistentVolumeBlock {
var newMapperErr error
if mapperPlugin != nil {
@ -535,7 +515,34 @@ func (rc *reconciler) reconstructVolume(volume podVolume) (*reconstructedVolume,
pod.UID,
newMapperErr)
}
checkPath, _ = volumeMapper.GetPodDeviceMapPath()
}
} else {
var err error
volumeMounter, err = plugin.NewMounter(
volumeSpec,
pod,
volumepkg.VolumeOptions{})
if err != nil {
return nil, fmt.Errorf(
"reconstructVolume.NewMounter failed for volume %q (spec.Name: %q) pod %q (UID: %q) with: %v",
uniqueVolumeName,
volumeSpec.Name(),
volume.podName,
pod.UID,
err)
}
checkPath = volumeMounter.GetPath()
}
// Check existence of mount point for filesystem volume or symbolic link for block volume
isExist, checkErr := rc.operationExecutor.CheckVolumeExistenceOperation(volumeSpec, checkPath, volumeSpec.Name(), rc.mounter, uniqueVolumeName, volume.podName, pod.UID, attachablePlugin)
if checkErr != nil {
return nil, checkErr
}
// If mount or symlink doesn't exist, volume reconstruction should be failed
if !isExist {
return nil, fmt.Errorf("Volume: %q is not mounted", uniqueVolumeName)
}
reconstructedVolume := &reconstructedVolume{

5
pkg/volume/util/operationexecutor/operation_executor.go
View File

@ -543,10 +543,12 @@ type MountedVolume struct {
// Mounter is the volume mounter used to mount this volume. It is required
// by kubelet to create container.VolumeMap.
// Mounter is only required for file system volumes and not required for block volumes.
Mounter volume.Mounter
// BlockVolumeMapper is the volume mapper used to map this volume. It is required
// by kubelet to create container.VolumeMap.
// BlockVolumeMapper is only required for block volumes and not required for file system volumes.
BlockVolumeMapper volume.BlockVolumeMapper
// VolumeGidValue contains the value of the GID annotation, if present.
@ -935,6 +937,9 @@ func (oe *operationExecutor) CheckVolumeExistenceOperation(
if attachable != nil {
var isNotMount bool
var mountCheckErr error
if mounter == nil {
return false, fmt.Errorf("mounter was not set for a filesystem volume")
}
if isNotMount, mountCheckErr = mounter.IsLikelyNotMountPoint(mountPath); mountCheckErr != nil {
return false, fmt.Errorf("Could not check whether the volume %q (spec.Name: %q) pod %q (UID: %q) is mounted with: %v",
uniqueVolumeName,