[ovirt-users] upgrade hosted-engine os ( not hosts )

[Yedidyah Bar David]

On Thu, Jun 30, 2016 at 11:53 AM, Gianluca Cecchi
<gianluca.cecchi at gmail.com> wrote:
> On Thu, Jun 30, 2016 at 8:00 AM, Yedidyah Bar David <didi at redhat.com> wrote:
>>
>>
>>
>> Basically, you can manually do what the tool is supposed to do:
>> 1. Make sure state is clean and stable (no running/pending storage
>> actions,
>> no VMs in the middle of migration etc), all clusters are compat level 3.6,
>> etc.
>> 2. Move to global maintenance
>> 3. backup the engine using engine-backup and keep the backup elsewhere
>> 4. Reinstall engine vm with el7 and 4.0 engine (the tool will use the
>> engine
>> appliance, you might too but not sure how exactly).
>> 5. Restore the backup and run engine-setup.
>> 6. If all looks ok, leave global maintenance.
>>
>> If you manually keep a full backup of the engine vm before step 4,
>> you might be able to restore this backup if there are problems.
>> Doing this in the provided tool is currently the main blocking issue
>> for it. Hopefully will be provided in 4.0.1.
>>
>> Best,
>> --
>> Didi
>> _____
>
>
> Hello,
> coming back to this proposed steps, do you think it could be applied also to
> single host environment with hosted engine?
> In that case a few clarifications needed
>
> 4. Reinstall engine vm with el7 and 4.0 engine (the tool will use the engine
> appliance, you might too but not sure how exactly).
> --> so in my still working 3.6 environment I will install a clean VM with
> el7 and at least at the beginning while I provision it, it should have
> different hostname and ip from previous engine vm, correct?
> And then? Can I shutdown previous engine vm and after that, give the same
> hostname and ip to the new el7 vm ?

My suggestion above was to reinstall the same existing VM.

If you want to have a new VM, you'll have to configure the HA daemons
to know this is the one they should handle, which is currently not
supported.
-- 
Didi