Using YUM to update to a certain errata level?

[Stainforth, Matthew (SD/DS)]

> Hey all,
> After exploring the yum and yum.conf man pages I'm surprised to see
> that
> there doesn't seem to be a way to do this. Is it possible to set yum to
> only
> update to a certain point in time? For instance, to install all errata
> up to
> a certain point in time? 

During a support ticket I asked about this very functionality and was told there is no way to accomplish this automatically.  I use RHN manually to queue up and schedule the updates.  Here was my question:


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In order to use yum, I would need to find a way to apply "all updates issued before date X" or "all errata up to errata #Y" so that production systems don't end up with errata issued later than what's on dev and test tiers.  If there is a way to do that?  I didn't see anything in the yum manpage that lets you pick a date when I glanced quickly through it.
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And here is what Support said:

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...so far, I haven't found a method for doing what you want to do other than with the --bz, --advisory, or --cve options, and even that wouldn't work in conjunction with RHN.  [...]it looks like your best solution with yum would be to use a script to have yum download plugins with the --bz, --cve, or --advisory.  The script would pull the bug numbers or security advisory numbers and plug them into a yum command similar to "yum --downloadonly --cve $i".  This would allow you to make one download of the necessary patched packages and apply them in any manner you like.