Re: [xenomai-images][PATCH 3/3] start-qemu: Start with read-writable rootfs

[Jan Kiszka <jan.kiszka@siemens.com>]

On 04.01.23 16:57, Florian Bezdeka wrote:
> On Wed, 2023-01-04 at 16:21 +0100, Jan Kiszka wrote:
>> From: Jan Kiszka <jan.kiszka@siemens.com>
>>
>> This is needed by systemd to initialize the machine ID on first boot.
> 
> I'm not facing any problem regarding the machine-ID here, but the LAVA
> tests are failing like this:
> 

I got

Welcome to Debian GNU/Linux 11 (bullseye)!

[   12.650423] systemd[1]: Set hostname to <demo>.
[   12.651334] systemd[1]: System cannot boot: Missing /etc/machine-id and /etc is mounted read-only.
[   12.651709] systemd[1]: Booting up is supported only when:
[   12.651992] systemd[1]: 1) /etc/machine-id exists and is populated.
[   12.652296] systemd[1]: 2) /etc/machine-id exists and is empty.
[   12.652595] systemd[1]: 3) /etc/machine-id is missing and /etc is writable.
[   21.224091] systemd[1]: Invalid unit wpa_supplicant-nl80211@.service symlink multi-user.target.wants/wpa_supplicant-nl80211@.service.
[   21.224776] systemd[1]: Invalid unit wpa_supplicant-wired@.service symlink multi-user.target.wants/wpa_supplicant-wired@.service.
[   21.226480] systemd[1]: Invalid unit wpa_supplicant@.service symlink multi-user.target.wants/wpa_supplicant@.service.
[   21.228235] systemd[1]: Failed to populate /etc with preset unit settings, ignoring: Read-only file system

with a qemu-arm image before this change.

> 2023-01-04T15:10:03 [?2004lmkdir: cannot create directory ‘/lava-6952’: Read-only file system
> 
> So, in addition to the qemu-script we might have to update the job
> templates for the qemu tests as well.
> 
> I already added "rw" to the qemu kernel cmdline in my local branch, but
> I updated to Debian 12 here and up to now was sure that this is
> something Debian 12 specific. I have no glue what changed in the test
> setup / LAVA installation that "rw" is necessary now. Any ideas?

That's more a question for Quirin, I do not even know when that mkdir 
comes from.

Jan

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