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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> 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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