[lxc-users] dnsmasq hostnames

[Fernando Blat]

Hello,

I love how dnsmasq is automatically reconfigured when a new container is
created, but since the last two days ago this feature is not working well.

Now, when I create a container named c1

$ lxc launch ubuntu:14.04 c1
$ lxc list
+------+---------+------+------+------------+-----------+
| NAME |  STATE  | IPV4 | IPV6 |    TYPE    | SNAPSHOTS |
+------+---------+------+------+------------+-----------+
| c1   | RUNNING |      |      | PERSISTENT | 0         |
+------+---------+------+------+------------+-----------+

The entry in the leases file specifies the new host as ubuntu:

cat /var/lib/lxd-bridge//dnsmasq.lxdbr0.leases
1464629670 00:16:3e:3f:53:5c 10.0.8.96 ubuntu *

Of course, `ping c1` doesn't work, but `ping ubuntu` does.

If I create a second container c2

$ lxc launch ubuntu:14.04 c2
$ lxc list
+------+---------+------------------+-----------------------------------------------+------------+-----------+
| NAME |  STATE  |       IPV4       |                     IPV6
         |    TYPE    | SNAPSHOTS |
+------+---------+------------------+-----------------------------------------------+------------+-----------+
| c1   | RUNNING | 10.0.8.96 (eth0) |
fd35:1ee0:10e8:42af:216:3eff:fe3f:535c (eth0) | PERSISTENT | 0         |
+------+---------+------------------+-----------------------------------------------+------------+-----------+
| c2   | RUNNING |                  |
fd35:1ee0:10e8:42af:216:3eff:fe11:d2b8 (eth0) | PERSISTENT | 0         |
+------+---------+------------------+-----------------------------------------------+------------+-----------+

The new entry is added as *:

1464629733 00:16:3e:11:d2:b8 10.0.8.52 ubuntu *
1464629670 00:16:3e:3f:53:5c 10.0.8.96 * *

This second container can't be accessed by a host name, only by IP.

I'm running LXD on Ubuntu 16:04

# dpkg -l | grep lxd
ii  lxd                                2.0.1-0ubuntu1~16.04.1
    amd64        Container hypervisor based on LXC - daemon
ii  lxd-client                         2.0.1-0ubuntu1~16.04.1
    amd64        Container hypervisor based on LXC - client

Do you have any clue why the host name included in the DNS leases file is
not picking the name of the container anymore?

Thanks in advance,
Fernando
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