Detach volume from non-existing instance

cinder

asked 2019-04-24 09:22:23 -0500

ICBeter
71 ●9 ●12 ●20

I have a volume that is attached to an already deleted instance. No idea how this happend, but I cannot delete this volume as long as it is still attached to something:

root@controller:/opt/scripts# openstack volume show 211ea613-442e-42db-9438-e51fe2f46487
+--------------------------------+----------------------------------------+
| Field                          | Value                                                                                                                                                                                                                                                                                                                              +--------------------------------+----------------------------------------+
| attachments                    | [{u'server_id': u'aa04d3e1-ffd7-48ee-af56-37942661598f', u'attachment_id': u'0d01ed31-2912-4aad-b142-657775dbd1de', u'attached_at': u'2018-06-01T20:05:15.000000', u'host_name': u'compute1', u'volume_id': u'211ea613-442e-42db-9438-e51fe2f46487', u'device': u'/dev/vda', u'id': u'211ea613-442e-42db-9438-e51fe2f46487'}] |

but:

root@controller:/opt/scripts# nova volume-detach aa04d3e1-ffd7-48ee-af56-37942661598f 211ea613-442e-42db-9438-e51fe2f46487
ERROR (CommandError): No server with a name or ID of 'aa04d3e1-ffd7-48ee-af56-37942661598f' exists.


root@controller:/opt/scripts# openstack volume delete 211ea613-442e-42db-9438-e51fe2f46487
Failed to delete volume with name or ID '211ea613-442e-42db-9438-e51fe2f46487': Invalid volume: Volume status must be available or error or error_restoring or error_extending or error_managing and must not be migrating, attached, belong to a group, have snapshots or be disassociated from snapshots after volume transfer. (HTTP 400) (Request-ID: req-9e84c6d4-de2b-4f64-b1ef-2870e431e8b2)
1 of 1 volumes failed to delete.

I have no idea what to do now...

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If the instance doesn't exist anymore, you can simply reset the volume state to "available": openstack volume set --state available <VOLUME>

eblock ( 2019-04-26 04:37:25 -0500 )edit

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answered 2019-04-29 03:10:19 -0500

ICBeter
71 ●9 ●12 ●20

updated 2019-04-29 03:10:58 -0500

Thank you for your comment, eblock. But it does not work:

root@controller:~# openstack volume set --state available 211ea613-442e-42db-9438-e51fe2f46487
root@controller:~# openstack volume delete 211ea613-442e-42db-9438-e51fe2f46487
Failed to delete volume with name or ID '211ea613-442e-42db-9438-e51fe2f46487': Invalid volume: Volume status must be available or error or error_restoring or error_extending or error_managing and must not be migrating, attached, belong to a group, have snapshots or be disassociated from snapshots after volume transfer. (HTTP 400) (Request-ID: req-aaad4a9f-b618-4761-baf9-298073ea023e)
1 of 1 volumes failed to delete.
root@controller:~# openstack volume show 211ea613-442e-42db-9438-e51fe2f46487
+--------------------------------+-----------------------------------------------------------+
| Field                          | Value                                                                                                                                                                                                                                                                                                                         |
+--------------------------------+-----------------------------------------------------------+
| attachments                    | [{u'server_id': u'aa04d3e1-ffd7-48ee-af56-37942661598f', u'attachment_id': u'0d01ed31-2912-4aad-b142-657775dbd1de', u'attached_at': u'2018-06-01T20:05:15.000000', u'host_name': u'compute1', u'volume_id': u'211ea613-442e-42db-9438-e51fe2f46487', u'device': u'/dev/vda', u'id': u'211ea613-442e-42db-9438-e51fe2f46487'}] |
...
| status                         | available

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Of course, I forgot to mention attach-status. You should also reset that: cinder reset-state --state available --attach-status detached 211ea613-442e-42db-9438-e51fe2f46487

eblock ( 2019-04-29 08:19:06 -0500 )edit

Thanks, eblock. That worked!

ICBeter ( 2019-05-20 04:19:23 -0500 )edit

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answered 2019-05-11 20:50:56 -0500

JorgeFranco

11 ●2 ●4 https://ormuco.com/

Hi @ICBetter!

Normally when this happens is due a missing request via your MQ or some event that is not trigered.

If the solution with the state doesn't work after some time, there are several ways to do that. But, the best way I've found was to do it directly from the DB. This solution is a litle bit tricky since it's required to modify 2 entries on the cinder and nova database and then delete the mapping for the volume attached on instance in nova DB.

Steps:

Go to a controller node. Access the MariaDB container. Access the Database.
Detach volume from cinder and Updated the volume status

    MariaDB [(none)]> use cinder;
    MariaDB [(cinder)]> update cinder.volumes set attach_status='detached',status='available'  where id='$volume_uuid';

Changed to nova DB

   MariaDB [(none)]> use nova;

Deleted the instance entry for that volume on the mapping table

   MariaDB [(nova)]> delete from block_device_mapping where not deleted and volume_id='$volume_uuid';

Finally, updated the nova bootindex on the mapping table for the volume root file system

   MariaDB [(nova)]> update nova.block_device_mapping  set boot_index=0 where not deleted and volume_id='$volume_uuid';

This two links can provide you more information:

https://raymii.org/s/articles/Fix_inc...

https://ask.openstack.org/en/question...

Hope this works for you as worked for me :D

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