qemu hook: event for source host too

[Michal Privoznik]

On 1/22/20 9:23 AM, Guy Godfroy wrote:
> I could launch `lvchange -asy` on the source host manually, but the aim 
> of hooks is to automatically execute such commands and avoid human errors.

Agreed. However, you would need two hooks actually. One that is called 
on the source when the migration is started, and the other that is 
called on the destination when the migration is finished (so that you 
can promote the shared lock to the exclusive again). Just out of 
curiosity - how do you handle the lock promoting?

Michal