Re: [Xen-users] lockfile?

[Alexander Schreiber <als@xxxxxxxxxxxxxxx>]

Hi,

On Fri, Oct 12, 2007 at 09:50:34AM +0900, Tomoki Taniguchi wrote:
> I have the configuration located on a shared drive
> so that if the primary xen server crashes/stops
> then i can start the domU on a backup xen server

But if that is what you are aiming at, you don't really needed a shared
drive (BTW: what do you mean by that? Shared SAN volume? NFS-Mount?).
What I did when I had to keep configs on different systems in sync was
to use a revision control system for that. I kept the configs in
subversion and used svn to sync them between the repository and the
systems. As a bonus, you get change logs ;-)

As for ensuring that only one copy of the domU runs you have pretty much
the same problem that any HA cluster has. So you should probably look at
the various heartbeat and distributed lock manager solutions if you
really want to go that far. 


> On 10/12/07, Nico Kadel-Garcia <nkadel@xxxxxxxxx> wrote:
> > Why would you put your config files on a shared drive? Shouldn't they be
> > configuration files, local to each host?
> >
> >
> > On 10/11/07, Mark Williamson <mark.williamson@xxxxxxxxxxxx> wrote:
> > > No, there's nothing like this currently available.
> > >
> > > However, the commercial products based on Xen (or other VMMs, in fact) may
> > > include support for stuff like this.
> > >
> > > Some of the open source management apps people are working one might
> > either
> > > support this now or in the future, I guess.  You could always register a
> > > feature request with one or more of them and see how they respond.
> > >
> > > Cheers,
> > > Mark
> > >
> > > On Wednesday 10 October 2007, Tomoki Taniguchi wrote:
> > > > is there a locking mechanism in xen
> > > > to prevent 2 xen server from running the same domU config
> > > > located on a shared drive?
> > > >
> > > > i wish that i you could specify a lock file in the domU config file,
> > > > then xm create configfile
> > > > will check to see if the lockfile specified in the config file exists.
> > > > if it exists, it exits out with an error.
> > > > if it does not exist, it creates the lockfile
> > > > and starts the domU.
> > > >
> > > > does something similar exits?

Regards,
       Alex.
-- 
"Opportunity is missed by most people because it is dressed in overalls and
 looks like work."                                      -- Thomas A. Edison

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users