[Users] Should host reboot trigger migration?

Doron Fediuck dfediuck at redhat.com
Mon Oct 14 02:47:28 EDT 2013



----- Original Message -----
> From: "Mario Giammarco" <mgiammarco at gmail.com>
> To: users at ovirt.org
> Sent: Sunday, October 13, 2013 8:11:32 PM
> Subject: Re: [Users] Should host reboot trigger migration?
> 
> Doron Fediuck <dfediuck at ...> writes:
> 
> > 
> > ----- Original Message -----
> > > From: "Dan Kenigsberg" <danken at ...>
> > > To: "Mario Giammarco" <mgiammarco at ...>, doron at ...
> > > Cc: users at ...
> > > Sent: Saturday, October 12, 2013 11:28:18 PM
> > > Subject: Re: [Users] Should host reboot trigger migration?
> > > 
> > > On Sat, Oct 12, 2013 at 05:14:45PM +0000, Mario Giammarco wrote:
> > > > Hello,
> > > > I have a two hosts ovirt cluster.
> > > > I rebooted one of the hoping to see the migration of vm on other host.
> > > > But it does not happen and so vm are brutally shutdownd.
> > > > 
> > > > Is auto migration supported? Where can I enable it?
> > > 
> > > I am afraid that we have no means for a host to inform Engine about an
> > > immanent reboot.
> > > 
> > > A scheduled reboot of a host should begin in moving it to "maintenance"
> > > in Engine.
> > > 
> 
> > 
> > Hi Mario.
> > 
> > As Dan explained, in managed data centers a host is first put into
> > maintenance
> > mode when needed. This ensures any critical resources are handled properly,
> > and in this case the VMs are migrated if needed.
> 
> Many thanks for both replies. I see that putting in "maintenance" mode an
> host could be the right way to shutdown an host.
> > so far. We do have thoughts on allowing a shadow VM for fault tolerance in
> > the
> > future, so if you're interested let us know.
> > 
> Yes I am interested to test it!
> 
> > Thanks for the feedback,
> > Doron
> > 
> 
> Thank you too.
> I dare to ask another thing (but I have already seen negative replies in
> mailing list): auto startup of virtual machines. It is a feature very useful
> because in case of an unexpected server shutdown there is no need to call me
> to restart vms at next boot.
> 
> Thanks again,
> Mario
> 

Hi Mario,
Indeed auto-start is missing as well.
If you have programming capabilities, feel free to send patches.

Other than that, I suggest that you keep monitoring the list, so
when a poll for features is made, you can add your vote. Here's
a recent example which is relevant for the next version: 
http://lists.ovirt.org/pipermail/users/2013-October/016898.html

Thanks again,
Doron


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