Disabling DHCP on a LibVirt setup

So you have this libvirt setup and you want to have a dhcp server on the virtual machines you are playing with , or you want to have all static IP's.

Libvirt uses dnsmasq to provide dhcp services etc and when you generate a config from the gui it will look like

  1. <network>
  2.   <name>piponet</name>
  3.   <uuid>e87d3bf1-a2e7-96ca-e131-7ae51ac033f9</uuid>
  4.   <bridge name='virbr2' stp='on' delay='0' />
  5.   <ip address='192.168.100.1' netmask='255.255.255.0'>
  6.     <dhcp>
  7.       <range start='192.168.100.128' end='192.168.100.254' />
  8.     </dhcp>
  9.   </ip>
  10. </network>

If you fully remove the dhcp section, then restart libvirt you'll notice dnsmasq running with no dhcpd on that subnet so you'll have full control again :)

  1. <network>
  2.   <name>piponet</name>
  3.   <uuid>e87d3bf1-a2e7-96ca-e131-7ae51ac033f9</uuid>
  4.   <bridge name='virbr2' stp='on' delay='0' />
  5.   <ip address='192.168.100.1' netmask='255.255.255.0'>
  6.      </ip>
  7. </network>

Submitted by Kris Buytaert on Fri, 12/04/2009 - 20:43
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Comments

Serge van Ginderachter's picture

#1 Serge van Ginderachter : Or you could install the latest virt-manager 0.8.1

.. which support disabling dhcp :-)


12/05/2009 - 13:07