On Tue, 10 Aug 2010, Nick wrote:
> To: centos@xxxxxxxxxx
> From: Nick <oinksocket@xxxxxxxxxxxxxxx>
> Subject: problems with yum_priorities on CentOS5/RHEL5
>
> Hello,
>
> Many of you will have read this page, with its (somewhat ambiguous) endorsement
> of yum_priorities:
>
> http://wiki.centos.org/AdditionalResources/Repositories/RPMForge
>
> As I gather has been stated before on the centos list [1], that quote stops
> short of outlining what exactly is wrong with yum_priorities (YP) and why it's
> the best solution. In fact it goes on to say:
>
>> as of yet, no real world problems have been reported with regard to the
>> 'yum-priorities' plugin
>
> Some (I hope, constructive) comments which might help users of yum/YP to avoid
> surprises:
>
> - The above statement should be altered, since it obviously isn't true
> (Judging both from comments in [1] and my own experience in [2])
>
> - Perhaps it could explain how YP works and when it doesn't with an example?
> (I have one you are welcome to copy in [2].)
>
> - Could the above page incorporate, or at least link to the useful information
> at the bottom of the page here:
>
> http://wiki.centos.org/PackageManagement/Yum/Priorities
>
> - Could it also mention somewhere quite visible that yum_priorities is not
> available on RHEL5 so any solutions using YP it will just not work there?
>
>
> I'd also like to know more about why YP cannot be made available on RHEL, but I
> guess this is not the place to ask.
>
> Plus I've noticed a couple of features of yum + YP which aggravate the
> shortcomings - again this is probably not the place, but I'll mention them
> anyway, as a heads-up to other users.
>
> 1. yum check-updates and yum update do *not* warn you of an impending
> unresolved dependency caused by YP hiding the required package.
>
> It seems the only way to find out is if you go ahead and try and perform the
> update, which potentially leaves you with one or more broken packages.
> This seems a serious flaw that should be fixed.
Not necessarily so.
I use '[root]# yum -y --skip-broken update' and this only
updates the packages that have no depsolving problems. Any
packages with problems are left out of the update.
> 2. Not only do higher priority packages totally eclipse lower priorities,
> whatever version, but yum_priorities also makes it seem like they aren't
> even present.
Well you can enable all your repos with:
[root]# yum --enablerepo=* --disablerepo=Cmedia5 update (or
whatever the DVD media repo name is).
I have Centos 5.5, ATrpms, EPEL and remi repos all working
reasonably well using yum-priorities plugin.
My repo priorites might need looking at, but I have no great
problems that I'm aware of yet.
Kind Regards,
Keith Roberts
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