On 12/19/2016 2:24 AM, Avishay Traeger wrote:
Multi-attach also happens during VM migration: (attach volume to
destination host, move VM to destination host, detach volume from source
host). It's not clear if rbd's limitation affects this as well - it's
not clear from the bug report or the patch.
On Thu, Dec 15, 2016 at 1:30 AM, Matt Riedemann
<mrie...@linux.vnet.ibm.com <mailto:mrie...@linux.vnet.ibm.com>> wrote:
On 12/14/2016 3:53 PM, Shane Peters wrote:
Hello all,
Per https://review.openstack.org/#/c/283695/
<https://review.openstack.org/#/c/283695/> multi-attach was disabled
for rbd volumes.
Does anyone know what features are missing or aren't compatible
in rbd
for it to support multi-attach?
Thanks
Shane
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Nova doesn't support multiattach volumes for any Cinder backend.
That's being worked by the Nova and Cinder teams but won't be
something that's implemented on the Nova side in the Ocata release,
and will be a stretch probably for Pike. There are weekly meetings
about this though, see:
http://eavesdrop.openstack.org/#Cinder,_Nova
<http://eavesdrop.openstack.org/#Cinder,_Nova>
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Thanks,
Matt Riedemann
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The live migration CI job runs Rbd-backed block live migration but we
haven't yet enabled that for volume-backed live migration, but I thought
that was possible, and was a big reason why a lot of deployments choose
Ceph for storage, the ease of use for live migration. Timofey Durakov
has been working on enabling the volume-backed live migration + Ceph
storage in our CI jobs so he'd know more.
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Thanks,
Matt Riedemann
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