Re: [libvirt] [RFC, PATCH] network: add 'netboot' option to dhcp config
On 09/11/2009 06:47 AM, Jeremy Kerr wrote:
Currently, libvirtd will start a dnsmasq process for the virtual
network, but (aside from killing the dnsmasq process and replacing it),
there's no way to define tftp boot options.
This change introduces a 'netboot' tag to the dhcp configuration:
<network>
<name>default</name>
<bridge name="virbr%d" />
<forward/>
<ip address="192.168.122.1" netmask="255.255.255.0">
<dhcp>
<range start="192.168.122.2" end="192.168.122.254" />
<netboot root="/srv/tftp" file="pxeboot.img"/>
</dhcp>
</ip>
</network>
When root= and file= attributes are present, these are passed to the
arguments to dnsmasq:
dnsmasq [...] --enable-tftp --tftp-root /srv/tftp --dhcp-boot pxeboot.img
At present, only local tftp servers are supported (ie, dnsmasq runs as
the tftp server), but we could improve this in future by adding a
server= attribute.
Since there is only one TFTP server running in the network, it is not
possible to specify different roots for different dhcp ranges. I think
the schema should be
<ip address="192.168.122.1" netmask="255.255.255.0">
<tftp root="/srv/tftp">
<dhcp>
<range start="192.168.122.2" end="192.168.122.254" />
<bootp file="pxeboot.img"/>
</dhcp>
</ip>
where in the future the bootp argument could grow a server attribute as
mentioned by Jeremy.
Paolo