Open Stack

Hey,

I can't help with the HA with the actual openstack setup, but for HA
of the vms I think I can try.
First: You could have HA for the persistent storage with a volume
backend like ceph, which is replicating the data.
Second: I would recommend to use a controller service for HA of the actual VMs.
Something like rightscale or scalr (opensource) this is making HA
easier and failover to other environments easier.
Having a Hybrid environment or if your private environment get's stuck
for a day you could failover to a public one or a second openstack
deployment in another datacenter.
Abstracting the VM failover and HA capabilities is ensuring more
flexibility in the long-run.

Third: Going back to the openstack HA, you could take a look at having
the 2 control nodes being held online with heartbeat or pacemaker etc.
I hope someone else can help out here.

Cheers Michael

On Tue, Oct 9, 2012 at 2:34 PM, Samuel Winchenbach <swinchen at gmail.com> wrote:
> Hi All,
>
> I am trying to figure out high availability and was wondering if
> anyone here has some good reading material on the subject?
>
> I currently have 4 physical machines (each with 8 dual-core 3GHz CPU
> and 128 GB of RAM) but we plan to scale up to a larger deployment in
> the near future of about 16 physical machines.
>
> Only two of the machines have connections to the outside over 1GbE so
> I am planning on making those the cloud controllers.   Seeing each
> machine is very capable I would also like to VMs on the two nodes
> designated as the cloud controllers.  Is this a bad idea?  I could
> also run them at a reduced load.
>
> Here is what I am thinking:
> https://docs.google.com/open?id=0ByOuh2TRmUHgcnI4ZU5UZTR3OU0
>
> Also does openstack have the ability to automatically re-start VMs on
> a new node that were running on a failed node?
>
> This is pretty new territory for me so any information you can send my
> way would be greatly appreciated.
>
> Thanks,
> Sam
>
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