[Users] CentOS 7.2 Upgrade with OpenVZ container and 2.6 kernel

[E Frank Ball III]

On Sat, Jan 02, 2016 at 03:28:25AM -0500, Jeffrey Walton wrote:
 > Hello everyone,
 > 
 > We rent a CentOS 7.1 VM:
 > 
 >     $ cat /etc/redhat-release
 >     CentOS Linux release 7.1.1503 (Core)
 > 
 > CentOS 7.2 was released recently
 > (http://wiki.centos.org/Manuals/ReleaseNotes/CentOS7) and yum is
 > prompting us to upgrade. In addition, its not giving us 7.1 security
 > updates.
 > 
 > We want to upgrade, but we are not sure if our configuration is
 > tested. The configuration includes a 2.6 kernel (not a 3.x kernel),
 > and we believe is due to OpenVZ container
 > (http://unix.stackexchange.com/q/238317):
 > 
 >     $ uname -a
 >     Linux cryptopp 2.6.32-042stab112.15 #1 SMP Tue Oct 20 17:22:56 \
 >         MSK 2015 x86_64 x86_64 x86_64 GNU
 > 
 > We can't determine if this a supported configuration, so we are not
 > sure if its expected to upgrade. The release notes don't discuss it
 > (http://wiki.centos.org/Manuals/ReleaseNotes/CentOS7), and we could
 > not find information on it searching the list archives
 > (http://www.google.com/search?q="CentOS+7.2"+site:lists.openvz.org).
 > 
 > Is it safe to perform the upgrade from 7.1 to 7.2 with the 2.6 kernel?
 > That is, is this a supported configuration that will update as
 > expected? If not, then what are our options?



systemd quit working when one of my OpenVZ machines upgraded from CentOS
7.1 to 7.2.  I tried re-installing, and it did the same then when
upgrading to 7.2.  That machine is running kernel 2.6.32-042stab093.5
It's now working fine with CentOS 6.

I have CentOS 7.2 working fine on OpenVZ with kernels
2.6.32-042stab108.8 and 2.6.32-042stab111.12.

I also have a machine with 2.6.32-042stab094.8, and I don't know if that
works or not, but 2.6.32-042stab112.15 should be fine (at least until
the next update).


   E. Frank Ball III      efball at efball.com