CentOS - Nov 2007 - Centos 5.1 distro: How to upgrade 5.0 to 5.1 with yum??

Hi,

 Redhat announced RHEL 5.1 on Nov 07, so hopefully
CentOS 5.1 will be ready shortly. But I get kind of
nervous of the arrival of 5.1.

 My problem is: I have hundreds Centos 5.0 boxes just
finished installation and I will continue to install
and upgrade hundreds more in next few months. With the
arrival of Centos 5.1, I don't like to reinstall them
anymore but continuous upgrade instead -- if this is
possible? 

 Currently I download the Centos 5.0 upgrade packages
from mirror sites on Internet
(.../centos/5/updates/{SRPMS,i386,x86_64}/...), with
the arrival of Centos 5.1, are the existing Centos 5.0
update packages will be removed in honor of Centos 5.1
updates? or it will stay? And how about the Centos
5.1's default packages in distro?   

 Give an example here:

 2.6.18-8.1.15 version kernel is the most recently
updated kernel for Centos 5.0 distro, if the Centos
5.1 distro comes with 2.6.18-8.1.10000 kernel and in
the first few weeks there are no kernel updates for
5.1, then how can I upgrade my kernel to
2.6.18-8.1.10000 naturally -- will the
2.6.18-8.1.10000 shows in the same update sources
directories(.../centos/5/updates/{SRPMS,i386,x86_64/...)?

 A similar question is: are the update diretories
contains only updates for 5.1 distro, or both 5.0 and
5.1?

 Any clarifications are greatly appreciated.

--Robinson


     
____________________________________________________________________________________
Never miss a thing.  Make Yahoo your home page. 
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Robinson Tiemuqinke pisze:
> Hi,
>
>  Redhat announced RHEL 5.1 on Nov 07, so hopefully
> CentOS 5.1 will be ready shortly. But I get kind of
> nervous of the arrival of 5.1.
>
>  My problem is: I have hundreds Centos 5.0 boxes just
> finished installation and I will continue to install
> and upgrade hundreds more in next few months. With the
> arrival of Centos 5.1, I don't like to reinstall them
> anymore but continuous upgrade instead -- if this is
> possible? 
>
>  Currently I download the Centos 5.0 upgrade packages
> from mirror sites on Internet
> (.../centos/5/updates/{SRPMS,i386,x86_64}/...), with
> the arrival of Centos 5.1, are the existing Centos 5.0
> update packages will be removed in honor of Centos 5.1
> updates? or it will stay? And how about the Centos
> 5.1's default packages in distro?   
>
>  Give an example here:
>
>  2.6.18-8.1.15 version kernel is the most recently
> updated kernel for Centos 5.0 distro, if the Centos
> 5.1 distro comes with 2.6.18-8.1.10000 kernel and in
> the first few weeks there are no kernel updates for
> 5.1, then how can I upgrade my kernel to
> 2.6.18-8.1.10000 naturally -- will the
> 2.6.18-8.1.10000 shows in the same update sources
> directories(.../centos/5/updates/{SRPMS,i386,x86_64/...)?
>
>  A similar question is: are the update diretories
> contains only updates for 5.1 distro, or both 5.0 and
> 5.1?
>
>  Any clarifications are greatly appreciated.
>   
It's simply. All things from 5.0 to 5.1 will be done automatically via 
yum (as standard update) or in rare situation can be possibly depedency 
problem (when mixing different repo ?).

So don't worry. if you are really affraid - update only one box and test 
... test ... then update the rest.

I must say. In Centos 4 world all updates from 1 to 2 to 3 ... to 5 were 
go in smooth way.

Regards,

Irens
> --Robinson
>
>
>      
____________________________________________________________________________________
> Never miss a thing.  Make Yahoo your home page. 
> http://www.yahoo.com/r/hs
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> http://lists.centos.org/mailman/listinfo/centos
>
>
>

On Wed, Nov 28, 2007 at 12:42:09PM -0800, Robinson Tiemuqinke
alleged:
> Hi,
> 
>  Redhat announced RHEL 5.1 on Nov 07, so hopefully
> CentOS 5.1 will be ready shortly. But I get kind of
> nervous of the arrival of 5.1.
> 
>  My problem is: I have hundreds Centos 5.0 boxes just
> finished installation and I will continue to install
> and upgrade hundreds more in next few months. With the
> arrival of Centos 5.1, I don't like to reinstall them
> anymore but continuous upgrade instead -- if this is
> possible? 
Don't think of 5.0 and 5.1 as different distros.  They are the same distro.

Think of it as a bunch of non-critical updates that were withheld from the
regular update cycle, tested as a set, and released all at once with a new
installer image.  It is just an update, analogous to a Windows service pack.

Think of RHEL5 as the distro, evolving through time, and 5.1 as a well-tested
snapshot of RHEL5 at a particular point in time.  

A regular 'yum update' will bring in all of the new updates.  There is
no need
to reinstall the OS.

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Robinson Tiemuqinke wrote:
> --- Jancio Wodnik <jancio_wodnik at wp.pl> wrote:
> 
>> Robinson Tiemuqinke pisze:
>>> 
>>>  Currently I download the Centos 5.0 upgrade packages from mirror
>>> sites on Internet (.../centos/5/updates/{SRPMS,i386,x86_64}/...),
>>> with the arrival of Centos 5.1, are the existing Centos 5.0
>>> update packages will be removed in honor of Centos 5.1
>>> updates? or it will stay? And how about the Centos
>>> 5.1's default packages in distro?
>>> 
>>>  Give an example here:
>>> 
>>>  2.6.18-8.1.15 version kernel is the most recently
>>> updated kernel for Centos 5.0 distro, if the Centos
>>> 5.1 distro comes with 2.6.18-8.1.10000 kernel and in
>>> the first few weeks there are no kernel updates for
>>> 5.1, then how can I upgrade my kernel to
>>> 2.6.18-8.1.10000 naturally -- will the
>>> 2.6.18-8.1.10000 shows in the same update sources
>>> 
>> 
> directories(.../centos/5/updates/{SRPMS,i386,x86_64/...)?
>>> 
>>>  A similar question is: are the update diretories
>>> contains only updates for 5.1 distro, or both 5.0 and
>>> 5.1?
>>> 
>>>  Any clarifications are greatly appreciated.
>>> 
>> It's simply. All things from 5.0 to 5.1 will be done automatically
>> via yum (as standard update) or in rare situation can be possibly
>> depedency problem (when mixing different repo ?).
>> 
>> So don't worry. if you are really affraid - update
>> only one box and test
>> ... test ... then update the rest.
>> 
>> I must say. In Centos 4 world all updates from 1 to 2 to 3 ... to 5
>> were go in smooth way.
>> 
>> Regards,
>> 
>> Irens
>> 
> 
>  I have had my local 5.0 update repository
> (.../centos/5.0/updates/{SRPMS,i386,x86_64}/...) setup
> and used it for my 900+ boxes's daily upgrade already.
> The repository is synchronized with official Internet
> mirrors daily to keep it current.
> 
>  My major concerns is: After the 5.1 is released, the
> update channel/directory
> (.../centos/5.1/updates/{SRPMS,i386,x86_64}/...)  may
> change to contain only updates for 5.1
> snapshot/release, not updates since 5.0. If so, then
> all my Centos 5.0 boxes will suffer.
> 
>  I have the serious concern because most Centos Mirror
> sites on Internet ONLY keep the updates for latest
> release/snapshot, not holds updates since the
> base(3.0, 4.0, 5.0 etc) release. This seems like a big
> problem if we would like to install from base|initial
> release (3.0, 4.0, 5.0) continuously and then use a
> single up-to-date update/ repository to upgrade
> machines to current level.
> 
> For example, at Stanford's Centos 4 mirror site, only
> 4.5 is mirrored while all the other
> 4.0/4.1/4.2/4.3/4.4 are not. and in the updates/
> directory only updates for 4.5 are kept there.  If the
> same is true for all other sites honoring 5.0 series,
> then I think I will definitely get screwed If I tried
> to keep on using base 5.0 and daily synced  updates/
> (exactly the same) for upgrade.
> 
> Any mirror sites hold updates since base release? Or I
> have to keep on adding more repositories to yum's
> configuration? 5.0 distro, 5.0 updates, 5.1 distro,
> 5.1 updates, 5.2 distro, 5.2 updates. etc. If so, then
> it is too low-performanced and erro-prone.
> 
> Any one have experience on upgrade Centos 4 releases
> from 4.0 to 4.5 can shed a light on this?
> 
> Thanks a lot.
> 
> --Robinson
> 
> 
If you remove the point release numbers from your update paths you do
not need the old versions. If you really need the old updates use
http://vault.centos.org/
>From http://mirror.centos.org/centos-4/4.4/readme
------------------------------------------------------------------------
This directory (and version of CentOS) is depreciated.  For normal
users,
you should use /4/ and not /4.4/ in your path. Please see this FAQ
concerning the CentOS release scheme:

http://www.centos.org/modules/smartfaq/faq.php?faqid=34

If you know what you are doing, and absolutely want to remain at the 4.4
level, go to http://vault.centos.org/ for packages.
------------------------------------------------------------------------


To simplfy our yum configuration I disable all the repo files in
/etc/yum.repos.d and call the yum configuration from a local web server
in yum.conf by using the include statement. One change on the web server
changes the yum configuration on all CentOS machines.

In the yum.conf I add

# Site yum files
include=http://ourserver.ourdomain.com/centos/yum/centos.repo
include=http://ourserver.ourdomain.com/centos/yum/centos-updates.repo

The centos.repo looks like this,

[base]
name=CentOS-$releasever - Base
baseurl=http://ourserver.ourdomain.com/centos/$releasever/os/$basearch/
enabled=1
gpgcheck=1

And the centos-updates.repo looks like this,

[updates-released]
name=CentOS-$releasever - Updates
baseurl=http://ourserver.ourdomain.com/centos/$releasever/updates/$basea
rch/
enabled=1
gpgcheck=1

[custom-repo]
name=CentOS-$releasever - Custom-rpms
baseurl=http://ourserver.ourdomain.com/centos/$releasever/customrepo/
enabled=1
gpgcheck=1

Hope this helps.

Dean