RHCOS 4.11 + RHEL 8.6 s390x: Failed systemd-modules-load.service

[jschintag]

When testing rhcos 4.11 based on RHEL 8.6 on s390x, i can see when booting the image, that the systemd-modules-load.service fails.
The Image passed the kola tests.

– Logs begin at Mon 2022-03-14 09:53:39 UTC, end at Mon 2022-03-14 09:55:59 UTC. –

Mar 14 09:53:39 localhost systemd-modules-load[248]: Inserted module 'fuse'

Mar 14 09:53:39 localhost systemd-modules-load[248]: Failed to find module 'ipmi-si'

Mar 14 09:53:39 localhost systemd-modules-load[248]: Failed to find module 'ipmi-devintf'

Mar 14 09:53:39 localhost systemd-modules-load[248]: Inserted module 'pkey'

Mar 14 09:53:53 localhost systemd-modules-load[1311]: Failed to find module 'ipmi-si'

Mar 14 09:53:53 localhost systemd-modules-load[1311]: Failed to find module 'ipmi-devintf'

At login:

---
[systemd]
Failed Units: 1
  systemd-modules-load.service
[core@cosa-devsh ~]$ systemctl status systemd-modules-load.service
● systemd-modules-load.service - Load Kernel Modules
   Loaded: loaded (/usr/lib/systemd/system/systemd-modules-load.service; static; vendor preset: disabled)
   Active: failed (Result: exit-code) since Mon 2022-03-21 09:16:29 UTC; 28s ago
     Docs: man:systemd-modules-load.service(8)
           man:modules-load.d(5)
  Process: 1312 ExecStart=/usr/lib/systemd/systemd-modules-load (code=exited, status=1/FAILURE)
 Main PID: 1312 (code=exited, status=1/FAILURE)

The Problem seems to be that the package fwupd is trying to load them:

[core@cosa-devsh modules-load.d]$ rpm -q --whatprovides /usr/lib/modules-load.d/fwupd-redfish.conf
fwupd-1.7.1-1.el8.s390x
[core@cosa-devsh modules-load.d]$ cat fwupd-redfish.conf
ipmi-si
ipmi-devintf

[cgwalters]

Does fwupd do anything on s390x? Should we just not be installing it at all?

[jschintag]

I asked around since i don't have that deep of a system knowledge myself. So installing fwupd on s390x seems questionable. The only thing that came up is vBMC in OpenStack and libvirt using IPMI, but this would be running on a kvm Host and i don't think we need that capability in CoreOS currently.
So i'll make a build without fwupd and test it.

[cgwalters]

Short term I'm fine carrying a postprocess script which drops out the incorrect module loads on s390x too.

[jschintag]

@cgwalters I could run RHCOS without fwupd with no problems, so i'll try it with fcos as well and if it works my plan is to not install it on s390x. I don't think we need to do this in postprocess

[miabbott]

if it works my plan is to not install it on s390x

I suspect this could be done for ppc64le as well.

@mrcxavier could you do some investigation about the usefulness of fwupd on ppc64le systems? is it supported? do customers use it? etc?