Re: [OSR-devel] IPs in cluster.conf and manual startup

[<go...@bo...>]

Thanks for that. :-)

I'm having a problem with the way the ifcfg-eth* files are being handled 
for the initrd. My ifcfg-eth1 file doesn't get transferred across 
verbatim. This is a problem because I have to explicitly specify the 
HWADDR in my ifcfg files (therwise they come up on wrong subnets).

It looks as if mkinitrd removes some lines from the file, and this causes 
eth1 to be physical eth0, which puts it on the wrong subnet, and that 
means it can't see the iSCSI shares.  :-(

I checked the /etc/sysconfig/network-scripts/ifcfg-eth1 in the initrd, and 
it is indeed lacking the HWADDR line (and a few others).

Am I missing something here? Does mkinitrd mangle the ifcfg-eth* files?

Thanks.

Gordan

On Mon, 22 Oct 2007, Mark Hlawatschek wrote:

>> I'm in a position where I have to move my GFS volume from one SAN to
>> another, on a different IP block.
>>
>> If my IP for the SAN and cluster operation is assigned by DHCP, do I have
>> to specify it in cluster.conf anyway? Or is specifying the MAC address
>> sufficient? Or do I specify something like "dhcp" as the IP address?
> Yes, it should be possible to use dhcp by adding this:
> <eth name="eth0" ip="dhcp" mac="yourmacaddress" />
> Please note, that defining a mac address is mandatory, because it defines the
> node in the cluster.
>
>>
>> If the cluster doesn't come up normally and I'm stuck in the initrd boot
>> image, is there a documented list of procedures on how to get from there
>> to mounting the GFS root volume in the right place sufficiently (i.e.
>> including the host speciffic files, such as /etc/modprobe.conf) to re-make
>> the initrd?
> You need to do the following steps:
> 1. mount your rootfs to /mnt/newroot if the cluster software fails to start,
> use the lockproto=lock_nolock option to mount the fs. But make sure it's the
> only node mounting the filesystem ;-) )
> # mount -t gfs -o lockproto=lock_nolock /dev/foo /mnt/newroot
> 2. mount --bind /dev /mnt/newroot/dev
> 3. mount -t proc proc /mnt/newroot/proc
> 4. mount -t sysfs none /mnt/newroot/sys
> 5. mount --bind /mnt/newroot/cluster/cdsl/<nodeid> /mnt/newroot/cdsl.local
> 6. chroot /mnt/newroot
> 7. you can make your changes and build new initrd in the chroot