[libvirt] RFC: configuring host interfaces with libvirt
Daniel P. Berrange
berrange at redhat.com
Fri Jan 16 16:15:25 UTC 2009
On Fri, Jan 16, 2009 at 03:06:16PM +0000, Daniel P. Berrange wrote:
>
> <interface type='physical'>
> <name>eth0</name>
> <mac address='00:19:d2:9f:88:96'/>
> <dhcp peerdns="yes"/>
> </interface>
>
> <interface type='physical'
> <name>eth1</name>
> <mac address='00:19:d2:9f:88:97'/>
> <ip address="192.168.0.5" gateway="192.168.0.1" netmask="255.255.255.0"/>
> </interface>
>
> <interface type='physical'
> <name>eth2</name>
> <mac address='00:19:d2:9f:88:98'/>
> </interface>
>
> <interface type='bond'>
> <name>bond0</name>
> <bond mode='active-backup'>
> <interface name="eth0" primary="yes"/>
> <interface name="eth1"/>
> </bond>
> </bond>
>
> <interface type='bridge'>
> <name>br0</name>
> <bridge stp='off'>
> <interface name="eth2"/>
> </bridge>
> <dhcp peerdns="yes"/>
> </bridge>
>
> <interface type='vlan'>
> <name>vlan0</name>
> <vlan tag="42" reorder_hdr="yes">
> <interface name='eth0'>
> </vlan>
> </inteface>
>
> > * Are there crucial config options that are not covered by the sketches
> > above (e.g., setting an explicit MTU) ? Are there things in the XML
> > sketches above that will be impossible to implement on some OS ?
>
> There are almost certainly things we won't be able to implement for certain
> backends. XenAPI's API does not allow for VLANs for example. The important
> thing would be to provide a way to query what capabilities are curently
> available. So akin to the host virt capabilities, we'd need network
> API capabilities data.
Actually I tell a lie - XenAPI does allow for bonding + vlans, using a
generic 'interface' class and a master/slave relation to associate
bonds with their interfaces, and interfaces with vlans. So the XML format
and functionality should map onto that quite well.
Daniel
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