Orphaning dnsmasq

[Tom Hughes]

On 25/08/11 15:24, Paul Wouters wrote:

> Here the issue is:
>
> 3) I mostly don't need/want any DNS/DHCP in my bridged setup, but it still
>      configures and starts dnsmasq (at least on F14 using virt-manager)
>      (eg I have a /28 bridges to eth1 with static IPs, I don't want it)
>
> The biggest problem for me is wanting to run a DNSSEC aware resolver, and the
> libvirtd/dnsmasq is preventing me from doing a simple "yum install unbound|bind"
> by stealing port 53. Especially on my laptop with libvirtd....

I think you've got something odd going on.... I'm using a bridged setup 
with libvirt and although I do have a dnsmasq running it is for the 
private network defined in libvirt (which I'm not using) and it is only 
listing on that private network's address.

So when I list networks I just have the default one:

virsh # net-list
Name                 State      Autostart
-----------------------------------------
default              active     yes

and it is defined over a private address range:

virsh # net-dumpxml default
<network>
   <name>default</name>
   <uuid>6229892b-486a-4c48-961a-20298d585e47</uuid>
   <forward mode='nat'/>
   <bridge name='virbr0' stp='on' delay='0' />
   <mac address='52:54:00:37:0B:C2'/>
   <ip address='192.168.122.1' netmask='255.255.255.0'>
     <dhcp>
       <range start='192.168.122.2' end='192.168.122.254' />
     </dhcp>
   </ip>
</network>

and that is what lsof shows dnsmasq as listening on:

dnsmasq 2229 nobody    6u  IPv4              23692      0t0       TCP 
192.168.122.1:domain (LISTEN)

Though like I say, I don't actually use that as I have br0 setup as a 
bridge to my ethernet card and use bridged networking with that instead.

Tom

-- 
Tom Hughes (tom at compton.nu)
http://compton.nu/