Hi,

could you please run the following command on the non responsive host and post the output here?

virsh domcapabilities

Also, could you please go to the Webadmin UI and check the warning signs on the host list and host detail to see, what flags is the host missing? You can also check the CPU Type on the host's detail page + all available cpus in the info icon next to it.

Regards,

Lucia

On Mon, Nov 15, 2021 at 6:30 AM <clin.yolo@gmail.com> wrote:
Hi, I'm attempting to build an oVirt node on a server. The host is an RHEL 8.4, I'm attempting to install OVirt 4.4.6 as per  instructions at https://www.ovirt.org/documentation/installing_ovirt_as_a_self-hosted_engine_using_the_command_line/index.html. I'm receiving the following error:

[ INFO  ] The host has been set in non_operational status, deployment errors:   code 156: Host redacted.com moved to Non-Operational state as host CPU type is not supported in this cluster compatibility version or is not supported at all,    code 9000: Failed to verify Power Management configuration for Host redacted.com.,
[ INFO  ] skipping: [localhost]
[ INFO  ] You can now connect to https://redacted.com:6900/ovirt-engine/ and check the status of this host and eventually remediate it, please continue only when the host is listed as 'up'

Now, I note that initially lm_sensors was unable to detect CPU temperatures, which was subsequently resolved (I don't recall how), however the issue still remains.

The CPU is an Xeon E5-2630 (IvyBridge). I cannot see any definitive CPU support catalog, so I'm unsure if this is no longer supported.

Within engine-logs-2021-11-13T12:22:10Z/log/ovirt-engine/engine.log, there were occurrences of `<model fallback='forbid'>IvyBridge-IBRS</model>`. From what I can tell, spectre/meltdown bugs have been mitigated:

```
egrep -e "model|cpu family|stepping|microcode" /proc/cpuinfo | sort | uniq
cpu family      : 6
microcode       : 0x42e
model           : 62
model name      : Intel(R) Xeon(R) CPU E5-2630 v2 @ 2.60GHz
stepping        : 4
```

In the installation documents, IvyBridge seems supported but the evidence above suggests it may not be. Can anyone advise on if this processor is _actually_ supported, and if so how I can remediate the issue? Thanks!
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