Open Stack

FWIW, we're using DRBD + pacemaker in active/passive setups for both the 
MySQL and RabbitMQ setup in the trystack.org (the artist formerly known 
as FreeCloud) project, and it's working quite well and is pretty simple 
to set up. Nati Ueno could give some more details on the setup and the 
Chef cookbooks used...

Best,
-jay

On 02/16/2012 03:46 AM, i3D.net - Tristan van Bokkem wrote:
> Any more thoughts about this subject? Ask? Vish?
>
> Best regards,
>
> Tristan van Bokkem
> Datacenter Operations
>
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>     ------------------------------------------------------------------------
>     *From:* Alexis Richardson [mailto:alexis at rabbitmq.com]
>     *To:* Major Hayden [mailto:major.hayden at rackspace.com]
>     *Cc:* i3D.net - Tristan van Bokkem [mailto:tristanvanbokkem at i3d.nl],
>     <openstack at lists.launchpad.net>
>     [mailto:openstack at lists.launchpad.net], Ask Solem
>     [mailto:ask at rabbitmq.com]
>     *Sent:* Tue, 14 Feb 2012 14:47:13 +0100
>     *Subject:* Re: [Openstack] Howto Nova setup with HA?
>
>     Major,
>
>     The current set-up of HA in Openstack is borked in several ways.
>
>     Ask Solem, cc'd, is going to write up a note helping people to do it
>     properly.
>
>     alexis
>
>
>     On Tue, Feb 14, 2012 at 1:34 PM, Major Hayden
>     <major.hayden at rackspace.com <mailto:major.hayden at rackspace.com>> wrote:
>      > On Feb 14, 2012, at 2:07 AM, i3D.net - Tristan van Bokkem wrote:
>      >
>      >> So, we can run MySQL in master-master mode on multiple hosts, we
>     can run nova-api on serveral hosts and load balance those and
>     RabbitMQ has a cluster ha setup as well but is this the way to go? I
>     can't find a clear answer to this. I am hoping one can shine some
>     light on this!
>      >
>      > If you want to make things a little simpler, an active/passive
>     MySQL setup with pacemaker, corosync, and DRBD will work quite well.
>     ClusterLabs has a pretty decent howto on their site:
>      >
>      > http://www.clusterlabs.org/wiki/DRBD_MySQL_HowTo
>      >
>      > As for RabbitMQ clustering, I worked with it for several days and
>     had quite a few problems with data consistency and availability. We
>     eventually settled on the "legacy" H/A method for RabbitMQ using
>     pacemaker and DRBD. There's a pretty good walkthrough on RabbitMQ's
>     site:
>      >
>      > http://www.rabbitmq.com/pacemaker.html
>      >
>      > --
>      > Major Hayden
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