DevHeads.net

Update to base release

By John Kennedy at 09/07/2010 - 11:22

Hello All,
We have some machines running CentOS 4 Update 4 (4.4). We want to update
these boxes to the stock CentOS 4 Update 8 (4.8).
We have the 4.8 iso images. Is it possible to use up2date and have it use
the 4.8 mounted iso images on a remote (install) server as the repository?
The ISO's are accessible through http. These servers are remote with no
CD/DVD option to upgrade that way.
I have tried to Google this but can't seem to quite hit what I need. I found
one that shows up2date-config GUI setup but I do not have X running on this
server and do not want to screw up the config with the CLI version of it.
We need to go to stock versions to match our production RHEL 4.8 machines.
Thanks,
John

Comments

Re: Update to base release

By Greg Bailey at 09/07/2010 - 12:33

John Kennedy wrote:
Check to see if you have the following file on your system:

/etc/yum.repos.d/CentOS-Media.repo

If you do, then just loopback mount the DVD image under /media/cdrom or
/media/cdrecorder, and then use the yum command as described in that
repo file:

yum --disablerepo=\* --enablerepo=c4-media [command]

Not sure if that works with "up2date" or not... haven't used up2date in
a long time...

-Greg

Re: Update to base release

By Robert Heller at 09/07/2010 - 12:25

You could mount the ISO's via the loopback device on the http server
('localeservername'):

mkdir /var/www/centos48
mount -t iso9660 -r -o loop /path/to/dvdrom.iso /var/www/centos48

then add /var/www/centos44 to /etc/httpd/conf/httpd.conf:

Alias /centos48/ "/var/www/centos48/"

<Directory "/var/www/centos48/">
Options Indexes FollowSymLinks
AllowOverride None
</Directory>

Then restart the httpd server:

/sbin/service httpd restart

Then on the machines you want to update:

create /etc/yum.repos.d/CentOS-48-Http.repo:

[c48-local-httpd]
name=CentOS-4.8 - Local Httpd
baseurl=http://localeservername/centos48/
gpgcheck=1
enabled=0
gpgkey=file:///usr/share/doc/centos-release-4/RPM-GPG-KEY-centos4

Then do

yum --disablerepo=\* --enablerepo=c48-local-httpd update

(The above was cribbed from the /etc/yum.repos.d/CentOS-Media.repo)

Basicly, the DVD *IS* a repository (corresponds to the base repo).

Re: Update to base release

By Gabriel Tabares at 09/07/2010 - 11:33

On 07/09/2010 16:22, John Kennedy wrote:
There are lots of instructions online how to do it, do a search for
"centos create yum repo iso" or something similar and you will get lots
of hits.

Gabriel