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Ho Florian,<br><br>I respect your opinion of course and I am not here to start a fight. Point is, how I understand it Nova really isn't very flexible on High Availability terms. I have now a master/master mysql setup with a Virtual IP working just to work around the shortcomings Nova imo introduces. This same story goes for RabbitMQ, I need to setup RabbitMQ in HA (which is fine) but I need to setup a Virtual IP for it as well just so Nova can correctly connect to it. Without the VIP the hole point of setting it up in a cluster is useless as you still will point nova to one single host.<br><br>It shouldn't be that hard to make Nova listen to multiple mysql addresses and rabbitmq hosts in a cluster?<br><br>Best regards,<br><br>Tristan van Bokkem<br>Datacenter Operations<br><br>Contact:<br>E-mail Personal: <a href="mailto:tristanvanbokkem@i3d.net">tristanvanbokkem@i3d.net</a><br>E-mail Support: <a href="mailto:info@i3d.net">info@i3d.net</a><br>E-mail NOC: <a href="mailto:noc@i3d.net">noc@i3d.net</a><br>Website: <a href="http://www.i3d.net" target="_blank">http://www.i3d.net</a> Office:<br>Interactive 3D B.V.<br>Meent 93b<br>3011 JG Rotterdam<br>The Netherlands<br><br>Visit www.smartdc.net – SmartDC is our in-house 36,000 sq. ft. datacenter in Rotterdam, The Netherlands. High density hosting – multiple fiber carriers in-house – Level3 PoP.<br><br>Interactive 3D (i3D.net) is a company registered in The Netherlands at Meent 93b, Rotterdam. Registration #: 14074337 - VAT # NL 8202.63.886.B01. Interactive 3D (i3D.net) is CDSA certified on content protection and security. We are ranked in the Deloitte Technology Fast 50 as one of the fastest growing technology companies.<br><blockquote style="padding-left: 5px; margin-left: 5px; border-left: #0000ff 2px solid; margin-right: 0px"><hr><b>From:</b> Florian Haas [mailto:florian@hastexo.com]<br><b>To:</b> openstack@lists.launchpad.net<br><b>Sent:</b> Fri, 17 Feb 2012 13:32:51 +0100<br><b>Subject:</b> Re: [Openstack] Howto Nova setup with HA?<br><br>On Thu, Feb 16, 2012 at 3:28 PM, i3D.net - Tristan van Bokkem<br>
<<a href="mailto:tristanvanbokkem@i3d.nl">tristanvanbokkem@i3d.nl</a>> wrote:<br>
> Hi Tom,<br>
><br>
> Thank you very much for sharing your knowledge, this will help not only me!<br>
> As I am still working on the MySQL part, you mentioned multi-master which I<br>
> have running indeed, but I suppose there still will need to be some kind of<br>
> entering point within the cluster. How did you managed this?<br>
<br>
Virtual cluster IP addresses and highly available MySQL (either DRBD<br>
or MySQL replication based). Pacemaker is very well capable of<br>
managing this.<br>
<br>
Of course, since you also quoted<br>
<a href="http://openlife.cc/blogs/2011/july/ultimate-mysql-high-availability-solution" target="_blank">http://openlife.cc/blogs/2011/july/ultimate-mysql-high-availability-solution</a><br>
parts of which I wholeheartedly disagree with (as with all of Henrik's<br>
Pacemaker bashing, but he's of course entitled to his own opinion),<br>
then you might run away screaming from anything that barely mentions<br>
Pacemaker in passing. But in reality[1], Pacemaker is an extremely<br>
capable HA stack that would be well suited for this.<br>
<br>
Cheers,<br>
Florian<br>
<br>
[1] To be polite, I should say "in my humble opinion," but my opinion<br>
on this really isn't humble at all, so I prefer being honest over<br>
being polite. :)<br>
<br>
-- <br>
Need help with High Availability?<br>
<a href="http://www.hastexo.com/now" target="_blank">http://www.hastexo.com/now</a><br>
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