@enr0n, the proposal to add:
bridges:
br0:
interfaces: [vlan1]
To the network config defeats the purpose. The goal is to not have to do
double configuration. The bridge is define in LXD, the vlan1 only in
netplan.
The other proposed fix of `KeepMaster=true` snippet in
/etc/systemd/network/10-netplan-vlan1.network.d/keep_master.conf didn't
work for me. I also tried putting it in 99-netplan-vlan1.network.d to
match the name of my netplan .yaml but still didn't work.
root@networkd-bug:~# cat /etc/netplan/99-vlan1.yaml
network:
version: 2
vlans:
vlan1:
id: 1
link: eth0
root@networkd-bug:~# cat
/etc/systemd/network/99-netplan-vlan1.network.d/keep_master.conf
[Network]
KeepMaster=true
root@networkd-bug:~# grep -n . /run/systemd/network/*vlan1*
/run/systemd/network/10-netplan-vlan1.netdev:1:[NetDev]
/run/systemd/network/10-netplan-vlan1.netdev:2:Name=vlan1
/run/systemd/network/10-netplan-vlan1.netdev:3:Kind=vlan
/run/systemd/network/10-netplan-vlan1.netdev:5:[VLAN]
/run/systemd/network/10-netplan-vlan1.netdev:6:Id=1
/run/systemd/network/10-netplan-vlan1.network:1:[Match]
/run/systemd/network/10-netplan-vlan1.network:2:Name=vlan1
/run/systemd/network/10-netplan-vlan1.network:4:[Network]
/run/systemd/network/10-netplan-vlan1.network:5:LinkLocalAddressing=ipv6
/run/systemd/network/10-netplan-vlan1.network:6:ConfigureWithoutCarrier=yes
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https://bugs.launchpad.net/bugs/2036127
Title:
Restarting `systemd-networkd` looses unmanaged bridged parents
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