[Libvir] [Discussion] 0/4 Implement DHCP host mappings for virtual networks

Richard W.M. Jones rjones at redhat.com
Fri Feb 22 09:38:36 UTC 2008


On Fri, Feb 22, 2008 at 08:04:26AM +0000, Mark McLoughlin wrote:
> On Thu, 2008-02-21 at 20:54 +0000, Richard W.M. Jones wrote:
> > What this patch allows you to do is to create a table of IP address to
> > host (defined by its hardware / MAC address) for each virtual network.
> > Optionally you can also assign a hostname.  When a host starts up and
> > requests an IP address through DHCP, if it is in this table then it
> > gets the fixed IP address from the table and, optionally, a fixed
> > hostname.
> > 
> > Four new API calls are added.  Two are required to list the contents
> > of the mapping table.  Two more allow you to add and delete a mapping.
> > 
> > The mapping table is semi-permanent.  It is stored in
> > /var/lib/libvirt/hosts-<networkname>.conf and survives across libvirtd
> > restarts.
> 
> 	Cool stuff, but why isn't this just an addition to the network's XML
> definition?

Well indeed.  It's essentially because this implementation was thought
to be easier.  I haven't tried the other implementation so I'm not
categorically sure that is true.

Rich.

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