[systemd-devel] How to add a second bridge to a nspawn container?

[Wojtek Swiatek]

Hello everyone,

I have an nspawn container which is currently connected to a bridge on the
host:

root at srv /e/s/nspawn# cat domotique.nspawn
[Exec]
Boot=yes
[Network]
Bridge=br0
#Bridge=wlx00c0ca384bd9

This results in a host0 interface being present in the container.
Everything works.

I now would like to add another interface in the container, which would be
bridged with a wireless card on the host. The commented out line above is
my attempt to add another bridge but it failed with

-- Subject: Unit systemd-nspawn at domotique.service has begun start-up
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Unit systemd-nspawn at domotique.service has begun starting up.
Jan 03 17:02:17 srv systemd-nspawn[17264]: Selected user namespace base
119472128 and range 65536.
Jan 03 17:02:17 srv systemd-nspawn[17264]: Failed to add interface
vb-domotique to bridge wlx00c0ca384bd9: Operation not supported
Jan 03 17:02:17 srv systemd-udevd[17279]: link_config: autonegotiation is
unset or enabled, the speed and duplex are not writable.
Jan 03 17:02:17 srv systemd-timesyncd[791]: Network configuration changed,
trying to establish connection.
Jan 03 17:02:17 srv networkd-dispatcher[906]: WARNING:Unknown index 26
seen, reloading interface list
Jan 03 17:02:17 srv systemd-timesyncd[791]: Synchronized to time server
145.238.203.10:123 (ntp.obspm.fr).
Jan 03 17:02:17 srv systemd[1]: systemd-nspawn at domotique.service: Main
process exited, code=exited, status=1/FAILURE
Jan 03 17:02:17 srv systemd[1]: systemd-nspawn at domotique.service: Failed
with result 'exit-code'.
Jan 03 17:02:17 srv systemd[1]: Failed to start Container domotique.

I am not sure whether "Operation not supported" means that there is
something wrong with that config? or that it is not possible to create a
bridge to a wireless NIC?
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