Rasberry /bootfs on external hard drive with gpt partition table

[claveryu]

My YunoHost server

Hardware: Raspberry Pi 3 at home ( Linux yunohost 5.10.103-v7+ #1529 SMP Tue Mar 8 12:21:37 GMT 2022 armv7l GNU/Linux)
YunoHost version:
I have access to my server : keyboard / screen
Are you in a special context or did you perform some particular tweaking on your YunoHost instance ? : yes
If yes, please explain: /boot on sd card, /root on external hard drive (usb) gpt partition table

Description of my issue

Hello,

Is it possible to setup /boot on sd card and /rootfs on external hard drive with gpt partition table ?

I tried, but can’t start the system.

Thanks

[claveryu]

I succed to boot, on the usb external drive on /rootfs, but I have an error message at the post-install :

Error: iptables/nftables does not seems to be working on your setup. You may be in a container or your kernel does have the proper modules loaded. Sometimes, rebooting the machine may solve the issue.

Rebooting don’t change anything.

root@yunohost:~# uname -a
Linux yunohost 5.10.103-v7+ #1529 SMP Tue Mar 8 12:21:37 GMT 2022 armv7l GNU/Linux

root@yunohost:~# yunohost tools update all
Traceback (most recent call last):
  File "/usr/bin/yunohost", line 9, in <module>
    import yunohost
  File "/usr/lib/moulinette/yunohost/__init__.py", line 7, in <module>
    import moulinette
ImportError: No module named moulinette
root@yunohost:~#

 root@yunohost:~# yunohost tools update all
Traceback (most recent call last):
  File "/usr/bin/yunohost", line 9, in <module>
    import yunohost
  File "/usr/lib/moulinette/yunohost/__init__.py", line 7, in <module>
    import moulinette
ImportError: No module named moulinette
root@yunohost:~#

root@yunohost:~# lsmod
Module                  Size  Used by
root@yunohost:~#

Everything seems wrong. What should I do ?