[ovirt-users] oVirt 3.6 on CentOS 6.7 based HyperConverged DC : Upgradable?

[Nicolas Ecarnot]

Le 29/03/2017 à 15:54, Yedidyah Bar David a écrit :
> On Wed, Mar 29, 2017 at 4:35 PM, Nicolas Ecarnot <nicolas at ecarnot.net> wrote:
>> [Please ignore the previous msg]
>>
>> Hello,

Hello Didi,

>> One of our DC is a very small one, though quite critical.
>> It's almost hyper converged : hosts are compute+storage, but the engine is
>> standalone.
>
> And you intend to keep it that way? You didn't mention below.

I intend to keep it this way.

>> At first glance, I would go this way (feel free to comment) :
>> - upgrade the OS of the engine : 6.7 -> 7.3
>
> How? This isn't supported, in principle, although it might work.

Mmmm, yep, you're right. Many people documented it.
I'm not very fond of playing for such a critical part.

> The "official" way is using engine-backup to backup and restore it.
> See also:
> https://bugzilla.redhat.com/show_bug.cgi?id=1332463

Ok,
Sent you a question there.

>> During this upgrade, I have no constraint to keep everything running, total
>> shutdown is acceptable.
>
> So you can also do a full backup and restore.

I could.
But I may run out of hosts at present.

> Create an NFS export domain
> somewhere, export all your VMs there, recreate everything from scratch,
> import the VMs. Will take much longer, but then you don't need to risk/
> test/prepare for problems in upgrading gluster.

Well, so your overall opinion is that I should stick to KISS, correct?

-- 
Nicolas ECARNOT