[Openstack] Openstack High Availability

Eugene Kirpichov ekirpichov at gmail.com
Mon Dec 17 20:28:12 UTC 2012


I suggest you to read a series of our blogposts on H/A in openstack (in
this order):

Sorry for the shameless promotion but I actually think it's relevant :)

On Mon, Dec 17, 2012 at 12:11 PM, Samuel Winchenbach <swinchen at gmail.com>wrote:

> Hi All,
> I am following the high availability guide provided by openstack as seen
> here: http://docs.openstack.org/trunk/openstack-ha/content/ch-intro.html
> I currently have mysql and rabbitmq setup with pacemaker and corosync.
>  Everything seems to be working fine.
> I am now adding in the openstack services.  I have keystone configured and
> it is using haproxy for load balancing/redundancy and keepalived for the
> virtual IP.  haproxy is set configured to bind to non-local address and is
> running on all HA nodes.
> Is this a good way to make the openstack services such as glance, swift,
> nova and keystone HA?
> Is it preferable to have keepalived start haproxy on the node that it
> assigns the virtual IP to, or is my setup with the non-local binding ok?
> Is this (
> http://docs.openstack.org/folsom/openstack-network/admin/content/ha_pacemaker.html)
> the preferred to make the networking (quantum) HA?
> and one last question:
> What is a good method to detect a compute node failure and automatically
> restart the virutal machines it was running on another node?
> Thank you so much, and sorry to bombard you with questions!
> Sam
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Eugene Kirpichov
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