[CentOS] disk duplication question

[m.roth at 5-cent.us]

Les Mikesell wrote:
> On Fri, Sep 9, 2011 at 11:51 AM,  <m.roth at 5-cent.us> wrote:
>>
>>> Clonezilla (especially with the drbl server) can do this pretty
>>> quickly over the network without having to juggle disks, but you end
>>> up with the same problem with the NICs - and in fact you will have it
>>> with any method of backing up and restoring on a different machine so
>>> it is something to consider even if you aren't cloning.   On 5.x,
>>> kudzu would normally run on the new machine, rename all the
>>> NIC-related files and create new default dhcp-based copies.  Not sure
>>> how 6.0 works in that respect.  If it doesn't do it automatically, you
>> <snip>
>> We've gone to upgrading using rsync, and NICs are a problem. UDEV
>> renames the NICs - eth0 to eth2, eth1 to eth3, and so there are no
>> ifcfg-eth? for them. Removing the MAC fixes this, including down in
>> /etc/udev/rules.d//70-persistant-net.rules
>
> So how do you know which NIC is which then?  Most of my boxes have 4
> to 6 and they appear in random order (well, flipped in pairs by
> driver) on reboots without being anchored with MAC addresses?   I need
> each one to keep the same IP and associated routes.

Yeah, I wasn't thinking of that. At some point, I should probably go back
into that rulefile and fix it. Hmmm, or write a simple script....

          mark