[Openstack-operators] Cinder Volume Multi-attach

Kostiantyn.Volenbovskyi at swisscom.com Kostiantyn.Volenbovskyi at swisscom.com
Fri Sep 9 07:26:14 UTC 2016

Cinder supports that from Kilo, but Nova needs to support that, [1]
And you can see in blueprint progress won't happen even in Newton (=so Ocata is earliest)

Also note that this will be Cinder-backend-specific, so you need to check when/if  Cinder backend used by you will support it.


From: Alexandra Kisin [mailto:KISIN at il.ibm.com]
Sent: Thursday, September 08, 2016 5:06 PM
To: openstack-operators at lists.openstack.org
Subject: [Openstack-operators] Cinder Volume Multi-attach


I'm running OpenStack Liberty release.
My question is if cinder supports volume multi-attach ?
Can the same volume be attached to more than one instances ?
Should anything be changed in the code level to make it work?

Currently I was able to create a new volume with --allow-multiattach option.
But it can't be attached to more than one instance.
I'm getting an error :
"ERROR (BadRequest): Invalid volume: volume '08cf47a0-2f31-422b-a124-192155143abf' status must be 'available'. Currently in 'in-use' (HTTP 400) (Request-ID: req-038db0fa-624d-45a1-a13c-2c5432790019)"

Thank you.


Alexandra Kisin
Servers & Network group, IBM R&D Labs in Israel
Unix & Virtualization Team

Phone: +972-48296172 | Mobile: +972-54-6976172 | Fax: +972-4-8296111
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