[lxc-users] Resolve .lxc domain with Ubuntu 17.04

[Serge E. Hallyn]

On Wed, Mar 29, 2017 at 12:16:29AM -0300, Norberto Bensa wrote:
> Hello list!
> 
> In previous versions of Ubuntu I had lxc domain name resolution
> working, but it's broken for me in 17.04.
> 
> Name resolution inside the containers work:
> 
> ubuntu at consulta:~⟫ ping fox
> PING fox.lxc (10.0.1.114) 56(84) bytes of data.
> 64 bytes from fox.lxc (10.0.1.114): icmp_seq=1 ttl=64 time=0.058 ms
> ^C
> 
> But it doesn't from the host:
> 
> zoolook at melnitz:~$ ping fox.lxc
> ping: fox.lxc: Name or service not known
> 
> 
> I've added 10.0.1.1 as a nameserver in
> /etc/resolvconf/resolv.conf.d/head, but it makes systemd-resolved eat
> my cpu at ~100%.
> 
>  1268 systemd+  20   0   57672  13292   5136 R  98,9  0,1   0:18.73
> /lib/systemd/systemd-resolved
> Logs from systemd are useless:
> 
> Mar 28 23:41:54 melnitz systemd-resolved[1268]: Processing query...
> 
> 
> I need/want to have name resolution working from the host. Does anyone
> have a solution?
> 

https://help.ubuntu.com/lts/serverguide/lxc.html#lxc-network