I help manage a small production server. The server runs a downlevel version of CentOS. CentOS recently announced Release for CentOS Linux 7 (1511) on x86_64.
Running yum update
picked up the release and offered 400+ packages upgrades. We would like to prohibit the upgrade at the moment on the production server.
We are most concerned about an accidental upgrade, like a script using -y
. We still want to receive updates for the older version of CentOS; we just don't want the OS upgrade.
How can we configure yum to avoid the CentOS 7 upgrade?
Here's what it looks like when we run yum update
:
$ sudo yum update
[sudo] password for xxxxxxxx:
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirror.hostduplex.com
* epel: linux.mirrors.es.net
* extras: mirror.hostduplex.com
* updates: mirror.hostduplex.com
Resolving Dependencies
...
Transaction Summary
================================================================================
Install 2 Packages (+6 Dependent packages)
Upgrade 412 Packages
Total download size: 374 M
Is this ok [y/d/N]:
Here is our yum.conf
:
$ cat /etc/yum.conf
[main]
cachedir=/var/cache/yum/$basearch/$releasever
keepcache=0
debuglevel=2
logfile=/var/log/yum.log
exactarch=1
obsoletes=1
gpgcheck=1
plugins=1
installonly_limit=5
bugtracker_url=http://bugs.centos.org/set_project.php?project_id=23&ref=http://bugs.centos.org/bug_report_page.php?category=yum
distroverpkg=centos-release
Here is the section in the manual covering the configuration: 12.4. Configuring yum. But its not obvious to me how to prohibit the upgrade.
Best Answer
This seems to be the same question as How do I keep Centos at version 6.3? and the second answer that might help you achieve what you want: https://serverfault.com/a/500606
Something like this might work:
yum --releasever=7.0 update
You may have to adapt as I'm not sure whatreleasever
your currently installed CentOS uses, maybe you also need to use 7.1. The latter answers to Yum: How can I view variables like $releasever, $basearch & $YUM0? should help you with that.Although another source mentions that this might still draw updates from later point releases, see http://www.linuxquestions.org/questions/linux-server-73/rhel-yum-update-without-migrating-to-point-releases-4175456496/
FWIW, this was also already asked the same way as How can I keep the RHEL version static (e.g. RHEL 5.1)? but I don't think that solution will work as cleanly as the above or if it will work at all.