[openstack-dev] blueprint proposal nova-compute fencing for HA ?
ubuntu at consolejunkie.net
Mon Apr 22 22:32:34 UTC 2013
On Mon, Apr 22, 2013 at 01:02:45PM -0400, Lon Hohberger wrote:
> On 04/22/2013 08:09 AM, Leen Besselink wrote:
> > Hi,
> > As I have not been at the summit and the technical videos of the Summit are not yet online I am not aware of what was discusses there.
> > But I would like to submit a blueprint.
> > My idea is:
> > It is a step to support VM High availability.
> > This part is about handling compute node failure.
> > My proposal would be to create a framework/API/plugin/agent or whatever is needed for fencing off a nova-compute node.
> > The implementation of the code that handles the fencing could be implemented in different ways for different environments:
> > - The IPMI-code that handle baremetal provisining could for example be used to poweroff or reboot the node.
> This sounds familiar :) These have been integrated in to several
> projects, including Pacemaker and oVirt:
Ahh, of course, that is a good idea. Thanks.
It is also packaged in Debian/Ubuntu.
I even had it checked out on my desktop, so I had seen it before. And I should have
known better. :-)
So where would the code that calls such fence-agents best fit into OpenStack ?
Or maybe this is an other new service in OpenStack (like there aren't enough already) ?
I guess it would run on a machine where you would also find something like the Nova
baremetal deploy helper service.
> There's a standalone API that they follow which simply takes stdin
> parameter=value assignments.
> These agents call out to IPMI, iLO, DRAC, RSA, and other integrated
> hardware as well as external power switches for controlling host power.
> Many of them are written in python (or C) and should require minimal if
> anything more than what OpenStack already requires.
> -- Lon
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