Allow bootp for dnsmasq in docker container

Question

I try to run dnsmasq which have to provide DHCP + BOOTP, but dnsmask doesn't open 67\udp port when it is running in container.

With similar configuration file on the host system it works properly.

I run container with flags -net host and -privileged, but it doesn't help me.

Why dnsmasq doesn't want to open 67/udp (BOOTP server) into container? How I able to fix it for doing that?

have a look at https://hub.docker.com/r/roninkenji/dnsmasq-docker/ — user2915097, Dec 02 '16 at 12:58
I run it like: docker run -d --privileged -v /sys/fs/cgroup:/sys/fs/cgroup:ro \ -v /etc/cobbler:/etc/cobbler \ -v /var/lib/tftpboot:/var/lib/tftpboot \ -v /etc/xinetd.d:/etc/xinetd.d \ -v /var/lib/cobbler:/var/lib/cobbler \ --net host \ 48b8f78ab34d — Oleg Ilyin, Dec 02 '16 at 13:16
see http://stackoverflow.com/questions/27596409/how-do-i-expose-a-udp-port-on-docker — user2915097, Dec 02 '16 at 13:26
there is parameter in command `--net host` . It'll provide host network to container. I run `netstat` -an into container firstly, and there is not open 67 port — Oleg Ilyin, Dec 02 '16 at 13:39
having `--net host` means it shares the host interface with the container, but if you do not say the port 67 is published, so... — user2915097, Dec 02 '16 at 13:50
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/129627/discussion-between-user2915097-and-oleg-ilyin). — user2915097, Dec 02 '16 at 14:01
I add `-p 67:67/udp` for command which run it, try to add `EXPOSE 67` in `Dockerfile`. it didn't help me. — Oleg Ilyin, Dec 02 '16 at 14:15

score 1 · Accepted Answer · answered Dec 02 '16 at 15:00

1

the root cause isn't in docker configuration. I missed to add configuration file /etc/dnsmasq.d/default.conf with required parameters. After adding it 67 port was opened and exposing began works

answered Dec 02 '16 at 15:00

Oleg Ilyin

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Allow bootp for dnsmasq in docker container

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