netplan dhcp domain search not working

[Kees Bakker]

This system is Ubuntu 18.04, using netplan configuration. In fact, it is a LXD container, if that matters at all.

With a simple netplan dhcp client configuration it does not set the domain search from the DHCP server. The DHCP server is configured correctly, I think, because all other clients setup their domain search as expected.

My netplan config is:

========8X======8X======8X======8X======
network:
  version: 2
  renderer: networkd
  ethernets:
    eth0: {dhcp4: true}
========8X======8X======8X======8X======

Output of systemd-resolve --status is as follows:

========8X======8X======8X======8X======
...
Link 26 (eth0)
      Current Scopes: DNS
       LLMNR setting: yes
MulticastDNS setting: no
      DNSSEC setting: no
    DNSSEC supported: no
         DNS Servers: 172.16.16.39
                      172.16.16.33
          DNS Domain: <mydomain1>
========8X======8X======8X======8X======

That <mydomain1> is really my actual first search domain. There should be another one.

[Kees Bakker (keestux)]

BTW. I'm suspecting that this one is related https://bugs.launchpad.net/netplan/+bug/1759014

Especially the UseDomains= setting, which is default false (why?)

[Kees Bakker (keestux)]

To me it seems that netplan (in combination with networkd) is not production ready.

I've switched to the Good Old ifupdown. That works flawlessly.