[CentOS] Allow updates but not upgrades

Thu May 10 09:49:03 UTC 2012
Peter Kjellström <cap at nsc.liu.se>

On Thursday 10 May 2012 03.58.17 Johnny Hughes wrote:
> On 05/10/2012 01:46 AM, Peter Kjellström wrote:
> > On Thursday 10 May 2012 17.36.07 Gregory Machin wrote:
> >> Hi.
> >> At the moment it seems my machines just update to the latest current
> >> release . I install a 6.0 machine and run yum update , and next thing
> >> its 6.2 .
> >> 
> >> I have a requirement where I need machines to only upgrade to even
> >> numbered sub releases eg: 6.0 , 6.2, 6.4 and only on my approval. But
> >> will allow updates within a given release.
> > 
> > There is no provided functionality to do this, that is, CentOS doesn't
> > differentiate between what you call updates and upgrades.
> 
> I want to point out that neither does Red Hat.
> 
> If you are on the RHEL 6 channel and if you run an update after you
> install RHEL 6.0, you will be at RHEL 6.2.
> 
> 6.0, 6.1, and 6.2 are really only point in time freezes of installation
> media.  They are not separate entities or versions.

To be fair that's not entierly true. At those points in time updates are more 
numerous and higher impact (new kernel -131 -> -220 last time, driver updates, 
some new tech. etc.).

/Peter
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