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Re: [Qemu-devel] Hardware watchdogs (patch for discussion only)
From: |
Paul Brook |
Subject: |
Re: [Qemu-devel] Hardware watchdogs (patch for discussion only) |
Date: |
Fri, 27 Feb 2009 12:19:53 +0000 |
User-agent: |
KMail/1.9.9 |
On Friday 27 February 2009, Steve Fosdick wrote:
> On Thu, 2009-02-26 at 17:50 +0000, Jamie Lokier wrote:
> > For real continuity of service you'd also want QEMU itself to have a
> > watchdog. Either a software watchdog internally (SIGALRM => kill/exec
> > self, or child process expecting regular pings over a pipe), or by
> > QEMU itself becoming a client of the host watchdog.
>
> So many possibilities - one, two, or three watchdogs?
IMHO external watchdog (i.e. ones that monitor qemu itself) are out of scope.
We should restrict this to internal watchdog devices within a VM.
There already exist several solutions for external fencing. Traditionally
these are used in a clustered environment, where physical machines are
connected to remote power switches (or equivalent management cards). Making
these system kill/restart virtual machines seems like it should be a very
minor tweak.
Paul
- [Qemu-devel] Hardware watchdogs (patch for discussion only), Richard W.M. Jones, 2009/02/25
- Re: [Qemu-devel] Hardware watchdogs (patch for discussion only), Daniel P. Berrange, 2009/02/26
- Re: [Qemu-devel] Hardware watchdogs (patch for discussion only), Richard W.M. Jones, 2009/02/26
- Re: [Qemu-devel] Hardware watchdogs (patch for discussion only), Steve Fosdick, 2009/02/26
- Re: [Qemu-devel] Hardware watchdogs (patch for discussion only), Jamie Lokier, 2009/02/26
- Re: [Qemu-devel] Hardware watchdogs (patch for discussion only), Steve Fosdick, 2009/02/27
- Re: [Qemu-devel] Hardware watchdogs (patch for discussion only),
Paul Brook <=
- Re: [Qemu-devel] Hardware watchdogs (patch for discussion only), Jamie Lokier, 2009/02/28
- Re: [Qemu-devel] Hardware watchdogs (patch for discussion only), Andreas Färber, 2009/02/28
- Re: [Qemu-devel] Hardware watchdogs (patch for discussion only), Richard W.M. Jones, 2009/02/28