I decided to try the upgrade process from EL 6 to 7 on the servers I used in my previous blog post “Windows (CIFS) fileshares using GlusterFS and CTDB for Highly available data”

Following the instructions here I found the process fairly painless. However there were 1 or two little niggles which caused various issues which I will detail here.

The servers were minimal CentOS 6.5 installs, with Gluster volumes shared via CTDB. The extra packages installed had mostly come from the EPEL or Glusterfs repositories, and I believe this is where the issues arise - third party repositories.

Gone are the days where we install nslookup for DNS resolution testing, the new(ish) kid on the block is dig. Although maybe not installed by default, it can be installed quite easily from yum, however it comes bundled with a number of tools so the package name isn’t all that obvious.

[root@server ~]# yum install bind-utils

Will do the trick, now how to use it?

[root@server ~]# dig @nameserver address.com

I wouldn’t normally write about this kind of move, but I’m in a position where I feel I have to. A little over a year ago I made a decision to move from Fedora to Ubuntu, it wasn’t a decision that was easy after all I have been using Fedora since its first release, and Red Hat since around version 5. Needless to say I was (and still am at heart) a die hard Red Hat fan. There seemed at the time to be a draw to Ubuntu, I was feeling a buzz around the community there that I wasn’t really seeing with Fedora (although I don’t think I was looking), a lot was going on around the Unity project - whether good or bad, it was still going on. So I jumped right in, installing the latest release 11.10 I think it was, joined the forums/wiki/launchpad etc and started filing bugs and generally making a nuisance of myself.