[Dnsmasq-discuss] Re: dnsmasq & dynamic DHCP updates?

Michael DeHaan mdehaan at redhat.com
Thu May 24 20:14:33 BST 2007

Michael DeHaan wrote:
> Question...
> I recently added dnsmasq support to cobbler 
> (http://cobbler.et.redhat.com), and I'm wanting a way to update both 
> DNS and DHCP entries programatically without restarting dnsmasq, if 
> possible.   (Editing a config file or two and signalling is totally 
> fine).   In general, what I want is something analogous to the dynamic 
> modification abilities of ISC omshell, without the utter brokenness 
> that is omshell :)
> I see the live DNS update portions are doable from reading 
> /usr/share/doc/dnsmasq-2.38/DBus-interface, though is something like 
> this doable for DHCP entries?   For instance, if I have a datacenter 
> with a new computer off the truck (MAC AA:BB:CC:DD:EE:FF, I want to be 
> able to assign that to hostname "blippy", though it looks like I first 
> need to know it's IP to do that... thus I need to modify the DHCP 
> config to assign this by a dhcp-host entry.   I'm not sure how to go 
> about doing that dynamically now.
> Basically right now I'm just templating out dnsmasq.conf and doing a 
> SIGHUP (/sbin/service dnsmasq reload), which per the manpage reloads 
> resolve.conf stuff, but not the dhcp-host entries in dnsmasq.conf ...  
> Or am I wrong about that?
> Regardless, dnsmasq setup was quite easy, and I'm likely to use it 
> much more in the future.  Neat stuff.
> Thanks,
> Michael DeHaan
Just read 
-- that appears to do what I want.

If that can also be added to the dbus interface that would be interesting :)


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