On 12/21/06, Serge Dubrouski <[EMAIL PROTECTED]> wrote:
On 12/21/06, Andrew Beekhof <[EMAIL PROTECTED]> wrote:
> On 12/21/06, Serge Dubrouski <[EMAIL PROTECTED]> wrote:
> > Attached is xen0 external stonith plugin (slightly changes ssh plugin)
> > that can use Xen Dom0 as a stonith device.
> >
> > Requirements:
> >
> > 1. hostlist parameter configured in cib.xml in a format
> > node_name:dom0_hostname:configfile_for_dumU
> >
> > 2. node_name must be the same as DomU name in Xen.
> >
> > 3. xm command has to be available through PATH variable on Dom0
> >
> > 4. ssh access without password from cluster nodes to Xen Dom0.
> >
> > When this plugin receives "reset" command it tries to kill DomU with
> > "xm destroy" and then restart it with "xm create". On and Off commands
> > aren't supported. But can be easily added if required.
>
> i think that would be a good idea
I'll add it.
>
> > Of course this plugin isn't a good solution for production but can be
> > used is a testing environment.
>
>
> a nice addition would be for the RA to detect the list of DomU's at
> startup (and redetect during status or some other recurring action).
> that would make stonith configuration for clusters of virtual nodes a
> no-brainer.
I'm not sure that it would work or I don't really get it. The idea
here is to have a cluster out of virtual nodes. For example on one Xen
server I configure node1 and on another node2. Heartbeat on those
nodes doesn't know that it's running on virtual nodes under Xen but
with this new plugin properly configured it'll be able to kill a
failed node if necessary. In this configuration Xen RA isn't used at
all.
right but we know and as a result we'd add this resource with a list of Dom0s.
that is enough information for the resource to use "xm list" and
populate the hostlist.
so now any cluster member that is also a DomU can now be fenced.
> some extra logic allowing the RA to run on the Dom0 might also be a
> nice extension
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