Can't edit rc.conf in Freebsd qcow2 using virt-edit

[teekwan]

Hi,
I'd like to use virt-edit to edit rc.conf before running the FreeBSD 11.3 official provided qcow2 image from https://download.freebsd.org/ftp/releases/VM-IMAGES/11.3-RELEASE/amd64/Latest/
I tried like this:

# virt-edit FreeBSD-11.3-RELEASE-amd64.qcow2  /etc/rc.conf
virt-edit: no operating system was found on this disk

If using guestfish '-i' option, remove this option and instead
use the commands 'run' followed by 'list-filesystems'.
You can then mount filesystems you want by hand using the
'mount' or 'mount-ro' command.

If using guestmount '-i', remove this option and choose the
filesystem(s) you want to see by manually adding '-m' option(s).
Use 'virt-filesystems' to see what filesystems are available.

If using other virt tools, this disk image won't work
with these tools.  Use the guestfish equivalent commands
(see the virt tool manual page).

It seems like an issue with FreeBSD's UFS and I was googling all around trying to make it work but no luck
Hope someone here tried it already and has a way forward.

For what it's worth - I use a RHEL 7.4 host and KVM.

Thanks in advance
Kind regards,
Darko

 

[teekwan]

I think I found the answer I was looking for, so I'll leave some info here for whom it may concern.
Haven't gotten around testing it yet, but I hope it saves the day
I'll post here when I do, mainly cause it's an old post from 2012 and back then r/w to UFS was experimental - I'd expect it's stable by now.

In short - kmod-ufs module is needed for RHEL to handle UFS.

Source:
http://linux-bsd-sharing.blogspot.com/2012/05/howto-mount-ufs-partition-on-centos-sl.html

Installing ElRepo for various RHELs/CentOS:
http://elrepo.org/tiki/tiki-index.php

Regards
Darko