[Server-devel] eth0 statii IP

[Tim Moody]

On startup /etc/rc.d/init.d/olpc-network-config (which points to 
/fsroot.olpc/etc/init.d/olpc-network-config) runs and, as Tony says, checks 
for the existence of /etc/sysconfig/olpc_net_config.

If it doesn't find that file it runs 
/etc/sysconfig/olpc-scripts/network_config (which points to 
/fsroot.olpc/etc/sysconfig/olpc-scripts/network_config).  I have the 
impression that /fsroot.olpc/etc/sysconfig/olpc-scripts/network_config can 
be run by other configuration scripts as well.

/fsroot.olpc/etc/sysconfig/olpc-scripts/network_config closes the loop by 
creating /etc/sysconfig/olpc_net_config, but ONLY if it succeeds.  It will 
fail if there are more than two wired ethernet adapters (or none); I have 
three so it always fails.

It copies /fsroot.olpc/etc/sysconfig/olpc-scripts/ifcfg-eth0, etc to 
/etc/sysconfig/network-scripts.  My approach to the problem of not losing 
the eth0 static IP address was to modify 
/fsroot.olpc/etc/sysconfig/olpc-scripts/ifcfg-eth0 as follows rather than 
just creating /etc/sysconfig/olpc_net_config.

#  OLPC School server
#  This file configures the ethernet port connected to the Internet (WAN)
DEVICE=eth0
ONBOOT=yes

#  Sometimes, a static address is assigned
IPADDR=192.168.0.160
#IPV6ADDR=2001:4830:2446:ff00::2/64
NETMASK=255.255.255.0
NETWORK=192.168.0.0
BROADCAST=192.168.0.255
GATEWAY=192.168.0.1

#  These defines are used to request a dynamic address [or not]
BOOTPROTO=none
DHCP_HOSTNAME=schoolserver

#  This is tied to a particular ethernet interface

That way even if something causes 
/fsroot.olpc/etc/sysconfig/olpc-scripts/network_config to run, the static IP 
config is not lost.

> ------------------------------
>
> Message: 2
> Date: Tue, 1 Jul 2008 07:04:39 -0700
> From: Tony Pearson <tpearson at us.ibm.com>
> Subject: [Server-devel] eth0 static IP requires
> /etc/sysconfig/olpc_net_config
> To: server-devel at lists.laptop.org
> Cc: Phill Hardstaff <phillh at spc.int>
> Message-ID:
> <OF27D1315A.E43714CA-ON87257479.004CCFE7-07257479.004D5137 at us.ibm.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
>> From: "Martin Langhoff" <martin.langhoff at gmail.com>
>> Subject: Re: [Server-devel] Laptop XS working
>> To: "Phill Hardstaff" <phillh at spc.int>
>
>> The XS has (or should have) 2 network interfaces.
>
>>  - eth0 is the internet / wan connection. It defaults to doing dhcp,
>> if you need to set it to a static ip address, edit
>> /etc/sysconfig/network-scripts/ifcfg-eth0
>
> Phil,
> For static IP you also need to create a file, which I did as
> follows:
>
> [root ~]# echo "# created by Tony" > /etc/sysconfig/olpc_net_config
>
> It doesn't matter what the contents are, however, XS checks for this file,
> and if it doesn't exist,
> copies over your ifcfg-eth0 with pre-defined DHCP ones.  The original idea
> I presume was that
> after it copies over the DHCP it would create this file to turn off the
> process and only do it on the
> first boot, but in my case, that file never got created, and all my work
> setting up static IP was
> over-written each time.  Creating this file solved the problem.
>
> Martin, would you like me to file a "bug" on this?
>
> Tony
>
>
>
>
> Tony Pearson
> Senior Storage Consultant, IBM System Storage?
> Telephone: +1 520-799-4309 |  tie 321-4309 |  Cell: +1 520 990-8669
> email: tpearson at us.ibm.com |  GSA: http://tucgsa.ibm.com/~tpearson
> Blog: http://www.ibm.com/developerworks/blogs/page/InsideSystemStorage
> AKA: 990tony Paravane, eightbar specialist
>
>
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