I had to take the DEOSS server off-line for a couple of hours this evening for a routine server operating system update. Essentially it involved upgrading its underlying Debian GNU/Linux operating system from version 10 (“buster” aka “old stable”) to version 11 (“bullseye” aka “stable”).
As Debian upgrades go, this proved to be one of my less eventful ones. Pretty much everything upgraded as expected. It also gave me the opportunity to revisit some configuration issues.
So I’m pleased to report that after several reboots and some fairly extensive server-side testing, the e-mail server and the web server both upgraded successfully and appear to be functioning correctly. And there certainly seems to be a significant improvement in web server performance.
This upgrade should also be good news for those with sites needing updated plug-ins. Some plug-ins refused to upgrade on the version of PHP shipped with Debian 10. Debian 11 has a later version of PHP, which allows these plug-ins to update correctly.
I have subsequently visited and logged-in to all sites hosted on this server and successfully updated all plug-ins. Everything appears to be functioning correctly.
However, with an upgrade of this magnitude, there may still be a few configuration issues and tweaks needed over the next few days. So, if you are a DEOSS customer and you are still having any issues, please contact me through the normal channels.