[ovirt-users] Re: How to upgrade CPU type in Clusters?

On 9 Feb 2019, at 02:53, Juhani Rautiainen <juhani.rautiainen(a)gmail.com&gt; wrote: On Sat, Feb 9, 2019 at 1:05 AM Vinícius Ferrão <ferrao(a)versatushpc.com.br&gt; wrote: > > Hello, > > For reasons unknown during oVirt 4.2 -> 4.3 my CPU type was Broadwell IBRS and because of this I can’t upgrade the datacenter to 4.3. The problem was that on 4.3 theres only Broadwell IBRS SSBD and Broadwell. > > So the only way to up the cluster to 4.3 was to downgrade to plain Broadwell. > > Now I can’t upgrade it Broadwell IBRS SSBD. > > So, how can I upgrade it back? There has been lot's of discussion about that this week. I had same problem with Opteron G3->Epyc conversion. There steps were suggested to me and they worked and you problem is similar:

- set HE global maintenance mode - set one of the hosted-engine hosts into maintenance mode - move it to a different cluster - shutdown the engine VM - manually restart the engine VM on the host on the custom cluster directly executing on that host: hosted-engine --vm-start - connect again to the engine - set all the hosts of the initial cluster into maintenance mode - upgrade the cluster - shut down again the engine VM - manually restart the engine VM on one of the hosts of the initial cluster - move back the host that got into a temporary cluster to its initial cluster

As first step I would add that you create new cluster which already has 4.3 level and CPU Type you want so already can check if cluster accepts nodes. -Juhani