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Re: Howto Nova setup with HA?


Any more thoughts about this subject? Ask? Vish?

Best regards,

Tristan van Bokkem
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From: Alexis Richardson [mailto:alexis@xxxxxxxxxxxx]
To: Major Hayden [mailto:major.hayden@xxxxxxxxxxxxx]
Cc: i3D.net - Tristan van Bokkem [mailto:tristanvanbokkem@xxxxxx], <openstack@xxxxxxxxxxxxxxxxxxx> [mailto:openstack@xxxxxxxxxxxxxxxxxxx], Ask Solem [mailto:ask@xxxxxxxxxxxx]
Sent: Tue, 14 Feb 2012 14:47:13 +0100
Subject: Re: [Openstack] Howto Nova setup with HA?

  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.
  On Tue, Feb 14, 2012 at 1:34 PM, Major Hayden
  <major.hayden@xxxxxxxxxxxxx> 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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