Comment 13 for bug 1896630

Hum, this may be a catch-22 in the service ordering, looking closer at console while a affected container boots:
[ OK ] Reached target Network (Pre).
         Starting Open vSwitch Database Unit...
         Starting Network Service...
[ OK ] Started Open vSwitch Database Unit.
         Starting OpenVSwitch configuration for cleanup...
         Starting Open vSwitch Forwarding Unit...
[ OK ] Started Open vSwitch Forwarding Unit.
[ OK ] Finished OpenVSwitch configuration for cleanup.
[ OK ] Started Network Service.
         Starting Wait for Network to be Configured...
         Starting Network Name Resolution...
[ OK ] Finished Wait for Network to be Configured.
         Starting Initial cloud-init job (metadata service crawler)...
[ OK ] Started Network Name Resolution.
[ OK ] Reached target Host and Network Name Lookups.

Looking at output from journalctl -u:
Feb 01 15:16:59 juju-b10aeb-6-lxd-7 ovs-ctl[419]: hostname: Temporary failure in name resolution

root@juju-b10aeb-6-lxd-7:/home/ubuntu# stat /run/systemd/network/10-netplan-eth2.*
  File: /run/systemd/network/10-netplan-eth2.link
  Size: 73 Blocks: 8 IO Block: 4096 regular file
Device: c0h/192d Inode: 34 Links: 1
Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root)
Access: 2021-02-01 15:26:34.294834047 +0000
Modify: 2021-02-01 15:22:29.621531946 +0000
Change: 2021-02-01 15:22:29.621531946 +0000
 Birth: -
  File: /run/systemd/network/10-netplan-eth2.network
  Size: 191 Blocks: 8 IO Block: 4096 regular file
Device: c0h/192d Inode: 35 Links: 1
Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root)
Access: 2021-02-01 15:26:39.582862189 +0000
Modify: 2021-02-01 15:22:29.621531946 +0000
Change: 2021-02-01 15:22:29.621531946 +0000
 Birth: -

With the addition of support for OVS in netplan I assume we also need OVS to run prior to netplan running, which kind of creates a cyclic dependency wrt. Open vSwitch's init script updating its database with FQDN from call to `hostname -f` each boot.

This is hidden on the physical host as MAAS / cloud-init manages /etc/hosts