[CentOS] Most efficient way to create a CentOS 3 test VM

Wed Nov 27 00:26:02 UTC 2013
Greg Bailey <gbailey at lxpro.com>

On 11/26/2013 4:38 PM, Johnny Hughes wrote:
> On 11/26/2013 02:00 PM, Warren Young wrote:
>> I'm about to create a new CentOS 3 VM for testing, since we still have a
>> bunch of deployed machines running that OS.
>> (Don't yell at me about using old OSes.  These machines won't get
>> "un-deployed" until they fall over dead of natural causes.  Until the
>> last one dies, we need test and build VMs around to service them.)
>> I have the CentOS 3.9 *.iso files plus a local cache of RPMs against 3.9
>> that is probably incomplete relative to the vault[*].
>> It seems wasteful to install the last published version of the OS, then
>> scp over my local update RPMs, freshen from those, *then* check with the
>> vault for yet more updates.
>> What I'm hoping for is some way to get a "CentOS 3.10", being 3.9 with
>> the vault updates directory contents merged in.
>> Is there a straightforward way to do that, or is schlepping around
>> folders full of RPMs actually the best way to go?
>> [*] http://vault.centos.org/3.9/updates/i386/RPMS/
> If I needed to do this, I would mirror the 3.9/os/ and 3.9/updates/
> directory (and others if you need them)
> Then I would create my directory as well in the same tree or even put my
> files in 3.9/updates/ as we are no longer putting files there anyway.
> Then I would rerun createrepo on the updates/i386 and updates/x86_64
> directories and do network installs and run updates.

I used to do something similar to this, except that in this case I'd 
assume "3.9/os/" and "3.9/updates/" are static, so I'd probably combine 
the RPMS from these 2 trees together (in a subdirectory called "RPMS" 
for instance), and then run:

repomanage -o RPMS | xargs rm -f

so that the outdated/superseded packages would be removed from the 
collection before running createrepo.