Re: [Xen-users] xen domU ID and static routing

[Thomas Halinka <lists@xxxxxxxxx>]

Hi Again,

another approach is here:

http://www.howtoforge.com/how-to-enable-networking-in-xen-guests-on-hetzners-new-eq-servers-debian-lenny

hth,

thomas

Am Mittwoch, den 06.01.2010, 14:11 +0100 schrieb Thomas Halinka:
> Hi csdemmer,
> 
> Am Dienstag, den 05.01.2010, 14:29 +0100 schrieb Info - csdemmer:
> > Hi,
> > 
> > I use a EQ 4 dedicated root server by hetzner with ubuntu jaunty. I
> > installed xen 3.3 with debian kernel and brought up 3 domUs.
> > Now comes networking...
> > Hetzner does not allow bridged networking so I have to use routed mode
> > in xen. No Problem so far, but the Problem actually is:
> > When I bring up a domU the routing table is created by the xen-script
> > vif-routing. The network interface name for this is created
> > dynamically, depending on the domU ID.
> 
> Im just assigning one ip of the subnet to dom0, that acts as router....
> 
> # cat /etc/xen/scripts/network-hetzner
> ---
>         #!/bin/bash
>         #
>         # This xen-network-scripts fires up the internal and external
>         bridges,
>         # and finally activates routing in dom0
>         #
>         #
>         # thohal, 14.01.09
>         #
>         ###### 
>         
>         #
>         # fire up internal bridge for openqrm
>         # ...
>         # .... some magic secrets in here :-)
>         # ...
>         # fire up external bridge public access
>         # xx.yy.zz.16/27
>         # usable ips: xx.yy.zz.161 - xx.yy.zz.190
>         
>         brctl addbr xen-public
>         ifconfig xen-public xx.yy.zz.65 netmask 255.255.255.224 up
>         
>         
>         #
>         # finally activate routing and let dom0 act as a router
>         #
>         #
>         
>         echo 1 > /proc/sys/net/ipv4/ip_forward
>         
> make it executable (chmod +x), configure it in /etc/xen/xend-config.sxp
> and restart xend...
> 
> 
> > 
> > Example:
> > If the domU ID is 16, the network interfaces name will be vif16.0 in
> > the dom0. So I tell shorewall (iptables frontend) that it shall ACCEPT
> > traffic from an to vif16.0. The next time I restart my server or just
> > the domU, there's a new network interface name, that the shorewall
> > firewall does not know...
> > 
> > As far as I know there's no way to tell a xen domU to get a static ID,
> > so the network interface name would be static as well.
> > Any Ideas or solutions? 
> 
> hth,
> 
> thomas
> 
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
> 
> 
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