Re: xen proposal

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On Fri, 18 Apr 2008, Kostas Georgiou wrote:

> On Fri, Apr 18, 2008 at 03:33:22PM -0500, Mike McGrath wrote:
>
> > The only reason we haven't done this already is the inability to detect if
> > the box is already up somewhere (which is something we need already)
> > Consider this scenario:
> >
> > app1 running on xen1 (which is having high load from koji1 also on xen1)
> >
> > People complain about the wiki.
> >
> > We move app1 to a more free box, xen7.
> >
> > high load causes CRASH
> >
> > xen1 reboots.  Attempts to bring app1 up (already up on xen7)
> >
> > Two machines try to write to the same disk - DOOM.
>
> What about using gfs (or maybe just nfs from the netapp) to keep the
> contents of /etc/xen/auto "synced" between hosts? Having /etc/xen/auto
> as a link to [sharedarea]/auto-xenXX and making sure that the entries
> there are unique will be a good start for a solution I think.
>

Network file shares are ill suited for tasks like configuration management
IMHO.

	-Mike

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