Re: [libvirt] On shutdown Destroy/Delete
Daniel P. Berrange schreef:
On Wed, Aug 20, 2008 at 02:34:22PM +0100, Richard W.M. Jones wrote:
> On Wed, Aug 20, 2008 at 02:31:52PM +0100, Richard W.M. Jones wrote:
>> On Tue, Aug 19, 2008 at 10:26:33PM +0200, Stefan de Konink wrote:
>>> I would really like to know how I can make a defined domain *gone* after
>>> shutdown :) (instead of it still be defined, after shutdown)
> [...]
>
> Oh right, so am I correct in thinking you want the domain to be
> undefined after it has shutdown itself? That's not possible
> currently. AIUI undefining a running domain is either an illegal
> operation or shuts it down abruptly -- you'll need to look in the
> source to see which. So you'd need some sort of 'reaper' cronjob to
> regularly undefine domains after they have gone into the shutdown
> state.
The easy answer is to simply *not* define it in the first place. If
you use virDomainCreateLinux() instead of virDomainDefine+virDomainCreate
then you'll get a running VM without any persistent config file behind
it. Then all trace will disappear when it shuts down.
That would be too easy ;) I define the domain because my API interacts
and ads resources before it is started. What I could do is before the
actualy 'start' command to undefine it, and start it with a
virDomainCreateLinux. That would be an interesting thought and now I
think of it, probably a clean way :)
My domains are automatically migrated across my cluster, so I am not
able to undefine it after shutdown, because technically I cannot know
that a domain is defined at that place. Alternatively I really hope that
the the ListDomains command shows the defined domains too :)
Stefan