Cannot resize disk 0

Community Support
1

I’m using version 5.4.6 and I am unable to resize disk 0 on one of my VM’s. At first I was getting an error:

  • Can’t resize an image which has snapshots

From the Storage I attempted to delete the snapshot but got an error that Active snapshots cannot be deleted.

From a separate forum post I the executed:

  • onedb change-body vm --id 202 ‘/VM/SNAPSHOTS[DISK_ID=0]/ALLOW_ORPHANS’ – “YES”

I was then able to delete the snapshot and I then executed:

  • onevm disk-resize 202 0 20480

The command executed without error but the disk did not resize. The vm’s error log shows:

Mon Apr 23 13:57:36 2018 [Z0][TM][I]: Command execution fail: /var/lib/one/remotes/tm/ssh/resize thor:/var/lib/one//datastores/0/202/disk.0 20480 202 111
Mon Apr 23 13:57:36 2018 [Z0][TM][E]: resize: Command “qemu-img resize /var/lib/one/datastores/0/202/disk.0 20480M” failed: qemu-img: Can’t resize an image which has snapshots
Mon Apr 23 13:57:36 2018 [Z0][TM][I]: qemu-img: This image does not support resize
Mon Apr 23 13:57:36 2018 [Z0][TM][E]: Error resizing image /var/lib/one/datastores/0/202/disk.0
Mon Apr 23 13:57:36 2018 [Z0][TM][I]: ExitCode: 1
Mon Apr 23 13:57:36 2018 [Z0][TM][E]: Error executing image transfer script: Error resizing image /var/lib/one/datastores/0/202/disk.0
Mon Apr 23 13:57:36 2018 [Z0][LCM][I]: VM disk resize operation completed.

Any idea what I should try next to resize?

2

AFAIK the datastore operation with enabled ALLOW_ORPHANS option is not supported by the QCOW2 backed storage drivers.

Best Regards,
Anton Todorov

3

Based on your feedback and my experiences, can you confirm these assumptions (assuming use of version 5.4.6) . . .

  • There is no way to resize a disk once a snapshot is taken
  • In my case specifically there is no way to resize my disk with the work-around I executed to delete the snapshots

Correct?

Thanks

4

The limits are related to the QCOW2 file format. The OpenNebula version is irrelevant.

This error message is from qemu-img tool so the file still has snapshots.

Best Regards,
Anton Todorov