Re: [libvirt] RFC: configuring host interfaces with libvirt

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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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