[Users] All VMs disappeared

[Frank Wall]

Hi Laszlo,

On 27.08.2013 14:24, Laszlo Hornyak wrote:
> If I understand correctly, this is what happens to your installation,
> the AddVmFromTemplate command goes to fail and engine tries to
> compensate, and upon successful compensation you get VM records
> removed from DB and storage cleaned up.

just to be sure, please note, that the task actually completed 
successfully from my point of view. The new VM (direved from the 
template clone task) is fully usable and on the webadmin the task is 
shown as "completed".

So maybe at some point in time the engine does get the job status wrong 
and the problem begins...

> I need to look into this but I think it should be safe to remove this
> record while the engine is down. Make sure to make a backup if you
> try!

OK, I did the following test:

- created a new VM from my custom template (with cloned Disk)
- waited for the job to complete
- manually deleted the related DB entry from the table "async_tasks"
- set host/node to maintenance
- rebootet engine

Result: The VM did NOT disappear! :-)

I think somehow ovirt-engine does get the results of the job wrong, thus 
it does not recognize that the job completed *successfully* and does a 
retry after reboot (which fails horribly and leads to disappearing VMs).


Thanks
- Frank