RPM Community Forums

Mailing List Message of <rpm-users>

Re: Single RPM database, multiple platforms

From: Mark Hatle <mark.hatle@windriver.com>
Date: Wed 04 Mar 2009 - 18:29:16 CET
Message-ID: <49AEBA6C.308@windriver.com>
I've seen this issue handled in the past by breaking up the RPM packages into 
binary arch/os components and non arch/os common packages..

That doesn't solve upgrade issues directly, but may be work considering as you 
migrate your products to newer versions in the future.

--Mark

Jeff Putsch wrote:
> On Mar 4, 2009, at 6:19 AM, Mark Hatle wrote:
> 
>> I have attempted something similar in the past, however on the same 
>> OS. Different databases made it easier to manage the components.
>>
>> A simple wrapper for the RPM command line items would allow you to 
>> specify (either automatically via uname, or manually such as --os=) 
>> and then dynamically switch the database.  This would be a much safer 
>> solution as well.
> 
> Understood. The part I'm "struggling" with is the shared directory tree 
> that we manage. This tree has a platform independent part and a platform 
> dependent part. If I use different databases then the following scenario 
> becomes problematic:
> 
>    If packages for rhel3 install stuff in platform independent part, the
>    other oses will not know it. An rhel4 package could nuke the stuff the
>    rhel3 package installed, the rhel3 package could then remove stuff the
>    rhel4 package depends upon.
> 
> It think this means I'd need a separate database for noarch that is OS 
> independent.
> 
>  From Jeff's description of controlling the database locations via 
> cpu/os or both I think I can do what I need and use separate databases. 
> We'll just have to make sure an RHEL3 package only installs in the RHEL3 
> area  and not in the platform independent area.
> 
> Jeff.
> 
> 
>>
>>
>> --Mark
>>
>> Jeff Putsch wrote:
>>>>> What are you trying to do?
>>>> Why not use multiple databases on different paths, which include
>>>> a platform string in the path to the rpmdb, instantly avoiding
>>>> the problem that you are seeing, instead?
>>> Well... I need to put together a packaging system that manages 
>>> multiple architectures (platforms) at once. The packages are 
>>> installed in a shared disk space (NFS storage) and the directory 
>>> structure being used needs to be backwards compatible with one 
>>> already in place. We use the --prefix and --exec-prefix style split 
>>> for most packages.
>>> The management of the installed packages needs to happen from one or 
>>> more computers sharing the storage and the management platforms may 
>>> be of different OSes and architectures for a given NFS repository.
>>> I need reporting, etc. from these hosts.
>>> Since RPM pretty much gets the job done (the key is to get the 
>>> "RPMTAG_ARCH" defined right), it seems much easier to me to have a 
>>> single rpm database for this shared tree, than multiple trees and 
>>> wrappers around RPM to make sure the right thing happens multiple 
>>> times, or to take the reporting output and merge it properly (e.g. a 
>>> "noarch" package installed in multiple trees should be reported only 
>>> once). With a merged tree and RPM handling the packaging the 
>>> "multiple" part of the problem takes care of itself.
>>> Thanks, again, for clearing up what RPM keys off of! I really 
>>> appreciate getting that straightened out.
>>> Jeff.
>>> -- 
>>> Jeff Putsch
>>> Email: putsch@mxim.com
>>> Office: 503.267.5480
>>> Horse ... Water ... Drink.
>>> ______________________________________________________________________
>>> RPM Package Manager                                    http://rpm5.org
>>> User Communication List                             rpm-users@rpm5.org
>>
>> ______________________________________________________________________
>> RPM Package Manager                                    http://rpm5.org
>> User Communication List                             rpm-users@rpm5.org
>>
> 
> -- 
> Jeff Putsch
> Email: putsch@mxim.com
> Office: 503.267.5480
> Horse ... Water ... Drink.
> 
> ______________________________________________________________________
> RPM Package Manager                                    http://rpm5.org
> User Communication List                             rpm-users@rpm5.org
Received on Wed Mar 4 18:29:37 2009
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