[Users] vms behaviour when a host shut down

[Nathanaël Blanchet]

Typically, we ask to our inverter to send a signal to the host to shut 
down when it runs on his battery so as OS extinction to be "clean". So 
we also want that the guests to shut down cleanly because they are so 
much important than the host, to prevent of database corruption for 
instance. For this, we could imagine host sending an init signal through 
a virtual serial port to the VMs. Do you think it is possible in that or 
an other way?
Le 24/01/2014 15:17, Dan Kenigsberg a écrit :
> On Fri, Jan 24, 2014 at 10:01:52AM +0100, Nathanaël Blanchet wrote:
>> Hi all,
>>
>> I'd like to be sure about the behaviour of vms when hist host goes
>> down for any reason. I suppose high availibility is for migrating
>> vms to another host, but how to do if I prefer them to shut down at
>> the same time of the host?
> For a planned shutdown of a host, you should move it to "maintenance"
> mode (which migrates all VMs from it) or shut down the VMs individually.
>
> If the host unexpectedly dies, it would be fenced by Engine.
> Highly-available VMs that were running on it, would be re-started on
> another host. You can mimic such a condition with logging into the host
> as root and doing
>      service vdsmd stop
>      pkill qemu-kvm
> (and may the force be with your guest's data)

-- 
Nathanaël Blanchet

Supervision réseau
Pôle exploitation et maintenance
Département des systèmes d'information
227 avenue Professeur-Jean-Louis-Viala
34193 MONTPELLIER CEDEX 5 	
Tél. 33 (0)4 67 54 84 55
Fax  33 (0)4 67 54 84 14
blanchet at abes.fr

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