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Re: [libvirt] how can dst know that migration is over?



On Thu, Oct 22, 2009 at 12:07:49PM +0100, Daniel P. Berrange wrote:
> On Thu, Oct 22, 2009 at 12:26:41PM +0200, Dan Kenigsberg wrote:
> > When migrating a domain from src to dst, it first appears 'suspended' at
> > the dst. When it's 'running', higher-level management can tell that
> > migration is done.
> > 
> > However, when bugzilla.redhat.com/519204 is fixed, I can no longer count
> > on that - migrated domain may still be suspended at the destination.
> > 
> > So how can I tell, at the destination, that migration is over? I could
> > add higher-level communication from src to dst, but I am reluctant to
> > add another failure mode. I'd rather have libvirt tell me, "hey
> > migration is done".
> 
> You'll get a series of events emitted
> 
>  1. On destination:
> 
>       VIR_DOMAIN_EVENT_STARTED + VIR_DOMAIN_EVENT_STARTED_MIGRATED
> 
>  2. On source, if non-live migration:
> 
>      VIR_DOMAIN_EVENT_SUSPENDED + VIR_DOMAIN_EVENT_SUSPENDED_MIGRATED
> 
>  3. On source, if completed
> 
>      VIR_DOMAIN_EVENT_STOPPED + VIR_DOMAIN_EVENT_STOPPED_MIGRATED
> 
>  4. On source, if aborted & non-live 
> 
>      VIR_DOMAIN_EVENT_RESUMED + VIR_DOMAIN_EVENT_RESUMED_MIGRATED
> 
>  5. On destination, if successful
> 
>      VIR_DOMAIN_EVENT_RESUMED + VIR_DOMAIN_EVENT_RESUMED_MIGRATED
> 
>  6. On destination if failed
> 
>      VIR_DOMAIN_EVENT_STOPPED + VIR_DOMAIN_EVENT_STOPPED_FAILED
> 

oh, so the 'detail' parameter is not just an ornament..

Thanks!


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