[libvirt] [PATCH v2] network: add 'bootp' and 'tftp' config
Daniel P. Berrange
berrange at redhat.com
Tue Sep 15 09:43:57 UTC 2009
On Tue, Sep 15, 2009 at 11:13:50AM +0200, Paolo Bonzini 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 the appropriate tags to the dhcp configuration:
>
> <network>
> <name>default</name>
> <bridge name="virbr%d" />
> <forward/>
> <ip address="192.168.122.1" netmask="255.255.255.0">
> <tftp root="/var/lib/tftproot" />
> <dhcp>
> <range start="192.168.122.2" end="192.168.122.254" />
> <bootp file="pxeboot.img"/>
> </dhcp>
> </ip>
> </network>
>
> When the attributes are present, these are passed to the
> arguments to dnsmasq:
>
> dnsmasq [...] --enable-tftp --tftp-root /srv/tftp --dhcp-boot pxeboot.img
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^
> from <tftp /> from <bootp />
>
>
> Possible future features in this field include the following:
>
> - 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 to <bootp>.
I think we possibly ought to move <tftp> one level higher up, outside
of the <ip> tag, since you can have a TFTP server regardless of whether
we've configured IP/dhcp details, and in the future we may well have
multiple <ip> tags.
> - Currently, the BOOTP file cannot be assigned to a specific <range> or
> <host>. Even if this was implemented, it would still make sense to
> allow <bootp> appearing directly within the <dhcp> element, providing
> a global default.
Daniel
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