[CentOS-devel] Delta RPMs disabled by default?

Thu Jul 10 15:25:16 UTC 2014
Blake Dunlap <ikiris at gmail.com>

Isn't this the point of package profiles in spacewalk?


On Wed, Jul 9, 2014 at 2:37 PM, Les Mikesell <lesmikesell at gmail.com> wrote:
> On Wed, Jul 9, 2014 at 1:36 PM, Howard Johnson <merlin at mwob.org.uk> wrote:
>>> So there's no way to force yum to only use deltas - or better, one set
>>> of deltas?   I've been looking for a sane way to get repeatable
>>> updates out of yum forever (i.e. update production to match your last
>>> QA update after testing is complete), and no, I don't consider keeping
>>> a snapshot copy of a repository in every state that I might want to
>>> reproduce to be a sane approach.
>> What you want sounds like a couple of fairly simple python scripts using
>> the yum api.  On box A, run a script that dumps a list of installed
>> packages, with full N-V-R for each.  Move the list to box B.  Pass it to
>> another script that creates a yum transaction to upgrade (or downgrade)
>> packages to those versions, and install any missing packages.  For bonus
>> points it could remove extra packages it finds.  None of this requires
>> drpms.  Hell, if you don't feel like going near the yum api, I reckon
>> you could do it with a bash script to generate an input file to pass to
>> "yum shell".
>> Actual implementation of said scripts is of course an exercise for the
>> reader ;)  And probably quite a fun and rewarding one, too.
> Yeah, assuming the boxes are identical to start, I think you can just
> 'yum list installed' and feed that on the command line  to 'yum update
> big_list' on the others.   But that is awkward, gets ugly with
> hardware-related packages, and probably breaks if you cross a minor
> rev boundary in Centos.   What I'm really looking for is something
> like a repository transaction id or even a timestamp to mark the last
> repository change to update to.   That is, something simple I could
> pick up from the repository to identify its current state
> during/before the test system update and then use to tell yum on the
> corresponding production update to ignore anything newer than that.
> Effectively this would correspond to the use of tags in a source
> control system, and for exactly the same usage and reasons.   It would
> come close if you could tell it not to use any source of rpms _except_
> a particular set of deltas and storing those sets might be slightly
> more sane than full repository snapshots for states you might like to
> reproduce.
> --
>    Les Mikesell
>      lesmikesell at gmail.com
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