network init script for two machines ( image )

Hello,

Before I start with the question I have to explain the situation:

we have two identical machines ( except the mac address ) with RAID
disks and SLES 10. To have them identical we move one of the raid disks
from one machine to the second and recreate the raid. The hostname and
the IP are the only things that have to be different.

Now to the question:

how can I create a network init script that sets two different hostnames
and IP adresses starting from the mac address ?
If it finds MAC 00:30:05:9B:3B:03 it should set hostname hosta and Ip
10.1.1.10, if it finds MAC 00:30:05:9B:3B:1B, then hostname should be
hostb and IP 10.1.1.12

Thanks
Andreas


Andreas Moroder

On 2008-06-30, Andreas Moroder <Andreas.moroder@[nospam]> wrote:
>
>
> Hello,
>
> Before I start with the question I have to explain the situation:
>
> we have two identical machines ( except the mac address ) with RAID
> disks and SLES 10. To have them identical we move one of the raid disks
> from one machine to the second and recreate the raid. The hostname and
> the IP are the only things that have to be different.
>
> Now to the question:
>
> how can I create a network init script that sets two different hostnames
> and IP adresses starting from the mac address ?
> If it finds MAC 00:30:05:9B:3B:03 it should set hostname hosta and Ip
> 10.1.1.10, if it finds MAC 00:30:05:9B:3B:1B, then hostname should be
> hostb and IP 10.1.1.12
>
> Thanks
> Andreas

DHCP
Avahi
IPv6

Bill Marcum schrieb:
>
> DHCP
> Avahi
> IPv6

Hello,

I don't like the idea to have a server that depends on a functioning
DHCP server

Bye
Andreas

On Monday 30 June 2008 09:55, Andreas Moroder wrote:

> Hello,
>
> Before I start with the question I have to explain the situation:
>
> we have two identical machines ( except the mac address ) with RAID
> disks and SLES 10. To have them identical we move one of the raid disks
> from one machine to the second and recreate the raid. The hostname and
> the IP are the only things that have to be different.
>
> Now to the question:
>
> how can I create a network init script that sets two different hostnames
> and IP adresses starting from the mac address ?
> If it finds MAC 00:30:05:9B:3B:03 it should set hostname hosta and Ip
> 10.1.1.10, if it finds MAC 00:30:05:9B:3B:1B, then hostname should be
> hostb and IP 10.1.1.12

Find out the MAC address, eg something like

mac=$(ifconfig eth0 | sed -n 's/.*HWaddr \([^ ]*\).*/\1/p')

if [ "$mac" = "00:30:05:9B:3B:03" ]; then
ifconfig eth0 10.1.1.10 netmask 255.255.255.0 up
# rest of config...
else
ifconfig eth0 10.1.1.12 netmask 255.255.255.0 up
# rest of config...
fi