Multi-Attached volume support
Nova and Cinder Queens release finally support multi-attached volume.
It is originally filed as bug 1751564 but it turns out we need more effort with multiple commits, so this blueprint is filed.
Blueprint information
- Status:
- Complete
- Approver:
- Akihiro Motoki
- Priority:
- Low
- Drafter:
- Vishal Manchanda
- Direction:
- Approved
- Assignee:
- Vishal Manchanda
- Definition:
- Approved
- Series goal:
- Accepted for 16.0.0-train
- Implementation:
-
Implemented
- Milestone target:
-
train-3
- Started by
- Akihiro Motoki
- Completed by
- Vishal Manchanda
Related branches
Related bugs
| Bug #1700034: wrong list of attached vms are shown in manage volume attachments | Fix Released |
| Bug #1751564: unable to attach multiattach volume to server | Fix Released |
Sprints
Whiteboard
Status as of Aug 8, 2019 -- amotoki
The main patch https:/
Only remaining item looks like the following minor improvements:
- The table of "Manage Attachments" dialog from the volume table is wrong when a multi-attach volume is being attached to multiple server instances. I see a single server name twice when a volume is attached to two servers. (bug 1700034 looks like the one.)
---
Initial patch with basic support: https:/
This blueprint needs to be updated to follow the blueprint template https:/
Gerrit topic: https:/
Addressed by: https:/
Use microversion 2.60 when attaching a multiattach volume
Notes from Akihiro on what should also be addressed in this blueprint:
* Depending on qemu and libvirt versions, even though the nova API and volume multiattach attribute say the multi-attach is supported, there is a case where the multiattach cannot be used. We need to raise a clearer error message for that case. At now, "Unable to attach volume." is shown.
* multi-attachable volumes attached to other instances are not listed in "Attach Volume" form from the instance table.
* "Manage attachments" action of the volume table needs to take into account multi-attachable volumes.
* allow_multiattach attribute needs to be specified during volume creation.
-- mriedem 20180424
For anyone interested in working on this, here is a short demo on setting up a devstack environment and working with multiattach volumes: https:/
Addressed by: https:/
Allow to select multiattach volume that has been attached
Gerrit topic: https:/
Gerrit topic: https:/
Addressed by: https:/
Wrong list of attached vms are shown in manage volume attachments
Work Items
Work items:
Attach multiattach capable volumes to server using compute API version 2.60: DONE
Improve error handling for specific multiattach failures: TODO
Show all instances attached to multiattach volume in "Attach Volume" form in instance table: TODO
"Manage attachments" action of the volume table needs to take into account multiattach volumes: TODO
Add the ability to create multiattach-capable volumes during volume creation (this might not be necessary since you can already do this in Horizon today): TODO
