I cross-posted this in one other popular forum on another site, and hopefully that is not too much.
I'm preparing to implement a FQDN change. We're going from short_name.example.com to short_name.xyz.example.com.
DNS is already taken care of. I'm not concerned with that part. I'm concerned with local changes.
The boxes are running RHEL ES 4 and RHEL ES 3.
Here is my plan so far.
Files I need to modify or at least check that they will still make sense.
- /etc/hosts (We have lots of friendly names that are only avail in the hosts file).
Actions I take after all the files are in place.
- Run *hostname* to change name.
- SIGHUP sendmail.
- On Apache httpd, see if ServerName is inherited from hostname somehow and its effects.
- Anything on Apache Tomcat to do?
- Reboot, maybe or definitely?
- hostname output
- hostname -s output.
- domainname output.
- Oddness in /var/log files.
- Check user mail for reported problems.
- Any other way to detect cron job failure?
- No Nagios alerts.
- Ensure Nagios alerts can still be sent!
- Test user functionality of site.
- Apache httpd log complaining?
- Tomcat log complaining?
- How to check db connectivity?
Thoughts? What am I forgetting? Where will I get bit in the ass?
Thanks, All, and cheers!