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unmap rbd volume if nodestage fails

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if mapping of rbd device is passed and mounting
device to stagingpath fails or if chmod on targetpath fails
,which may leave up stale mapping if
unstage is called

this will be fixed by unmapping if somthing fails

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
This commit is contained in:
Madhu Rajanna 2019-07-24 18:48:23 +05:30 committed by mergify[bot]
parent 4e529e6643
commit 5d85f965df
1 changed files with 30 additions and 1 deletions
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31
pkg/rbd/nodeserver.go
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@ -116,12 +116,20 @@ func (ns *NodeServer) NodeStageVolume(ctx context.Context, req *csi.NodeStageVol
}
klog.V(4).Infof("rbd image: %s/%s was successfully mapped at %s\n", req.GetVolumeId(), volOptions.Pool, devicePath)
isMounted := false
// if mounting to stagingpath fails unmap the rbd device. this wont leave any
// stale rbd device if unstage is not called
defer func() {
if err != nil {
ns.cleanupStagingPath(stagingTargetPath, devicePath, volID, isBlock, isMounted)
}
}()
// nodeStage Path
err = ns.mountVolumeToStagePath(req, stagingTargetPath, devicePath)
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
isMounted = true
err = os.Chmod(stagingTargetPath, 0777)
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
@ -132,6 +140,27 @@ func (ns *NodeServer) NodeStageVolume(ctx context.Context, req *csi.NodeStageVol
return &csi.NodeStageVolumeResponse{}, nil
}
func (ns *NodeServer) cleanupStagingPath(stagingTargetPath, devicePath, volID string, isBlock, isMounted bool) {
var err error
if isMounted {
err = ns.mounter.Unmount(stagingTargetPath)
if err != nil {
klog.Errorf("failed to unmount stagingtargetPath: %s with error: %v", stagingTargetPath, err)
}
}
// remove the block file created on staging path
if isBlock {
err = os.Remove(stagingTargetPath)
if err != nil {
klog.Errorf("failed to remove stagingtargetPath: %s with error: %v", stagingTargetPath, err)
}
}
// Unmapping rbd device
if err = detachRBDDevice(devicePath); err != nil {
klog.Errorf("failed to unmap rbd device: %s for volume %s with error: %v", devicePath, volID, err)
}
}
// NodePublishVolume mounts the volume mounted to the device path to the target
// path
func (ns *NodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublishVolumeRequest) (*csi.NodePublishVolumeResponse, error) {