Debian Question posted in
The oficial documentation can be found here.

Libvirt dnsmasq is running on all interfaces, this is undesired – Debian

So currently I’m running libvirt on my debian box, and it’s DHCP server is listening on all interfaces, I would like to restrict that down to the bridge interface where the VMs would live. I can kill off the dhcp server temporarily to accomplish what I need but would like something more permanent.

I’m sure there is some option I can put in the dhcp server portion of the network config to make this happen.

<network>
  <name>default</name>
  <uuid>2fb34907-96bc-4af1-89a2-4f1f872a2600</uuid>
  <forward mode='nat'/>
  <bridge name='virbr0' stp='on' delay='0'/>
  <mac address='52:54:00:c3:d2:ea'/>
  <ip address='192.168.122.1' netmask='255.255.255.0'>
    <dhcp>
      <range start='192.168.122.2' end='192.168.122.254'/>
      <host mac='52:54:00:21:df:dc' ip='192.168.122.2'/>
    </dhcp>
  </ip>
  <route address='192.168.122.2' prefix='32' gateway='192.168.122.110'/>
</network>

root@calypso-deb:~# lsof -i -n | grep dnsmasq
dnsmasq     1656       nobody    3u  IPv4   29150      0t0  UDP *:bootps 
dnsmasq     1656       nobody    5u  IPv4   29153      0t0  UDP 192.168.122.1:domain 
dnsmasq     1656       nobody    6u  IPv4   29154      0t0  TCP 192.168.122.1:domain (LISTEN)
root@calypso-deb:~#
Tags:

2

Answers


  1. 0

    It should already be listening on virbr0 interface only, as the config shows that too.

    You can check that with lsof -i -n | grep dnsmasq or similar tools.

    Login or Signup to reply.
  2. 0

    Here’s a suggestion (which is meant to be a comment rather than an answer, but I cannot comment).

    User Jonathon Reinhart posted an answer that describes how to pass options to dnsmasq (since libvirt v.5.6.0). See also “Network XML format” in the libvirt documentation. This got me wondering whether passing something like --interface=virbr0 --bind-interfaces would do what you need in this case.

    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search