From: Giulio Fidente <gfidente@redhat.com>
To: David Moreau Simard <dmsimard@iweb.com>
Cc: Loic Dachary <loic@dachary.org>,
Florian Haas <florian.haas@hastexo.com>,
"ceph-devel@vger.kernel.org" <ceph-devel@vger.kernel.org>
Subject: Re: Ceph & Cinder & HA
Date: Fri, 07 Nov 2014 10:56:26 +0100 [thread overview]
Message-ID: <545C974A.2090609@redhat.com> (raw)
In-Reply-To: <A6E8431B-9D66-4545-96A9-56E2C27AB9ED@iweb.com>
On 11/07/2014 10:50 AM, David Moreau Simard wrote:
> Giulio,
>
> Right. The volume part is tricky because the volume is ultimately tied to one cinder-volume instance.
> I don't have a magic solution for that yet.
yep but this can be worked around by customizing the host= setting in
Cinder so all instances of cinder-volume look like a single 'host'
this was discussed with Cinder guy here, which I am in touch with too,
and is known to expose some issues due to multiple cinder-volume
instances potentially trying to get access to the same volume when
multiple tasks are queued ... yet this is 'known stuff' and they are
already working on a 'state machine' for Cinder which will fix the a/a
scenario
until then, the idea is to deploy cinder-volume in a a/p scenario, yet
customizing the host= setting
--
Giulio Fidente
GPG KEY: 08D733BA | IRC: giulivo
next prev parent reply other threads:[~2014-11-07 9:57 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-06 15:57 Ceph & Cinder & HA Loic Dachary
2014-11-07 8:46 ` David Moreau Simard
2014-11-07 9:35 ` Giulio Fidente
2014-11-07 9:50 ` David Moreau Simard
2014-11-07 9:56 ` Giulio Fidente [this message]
2014-11-07 10:08 ` Sebastien Han
2014-11-09 21:54 ` Justin Erenkrantz
2014-11-10 10:34 ` Sebastien Han
2014-11-10 10:51 ` Loic Dachary
2014-11-10 11:50 ` Giulio Fidente
2014-11-10 16:39 ` Gregory Farnum
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