Sametime upgrade – A thing to be aware of

Today I noticed that Sametime awareness was not working in Verse. Since it did until a few days ago I started to look what could be wrong. I tried to log in to Sametime and could not.

Alas, time to look at the logs on the server; doing so I noticed a strange error in the community container log. A timeout when connecting to my LDAP server. I checked my Domino server, which is my LDAP and everything was fine. So I started a remote session with my Linux box where I have installed Sametime and all of a sudden weird errors appeared when I tried to change directory from / to /sametime. A look at the filesystem left me horrified. I had the disk full!!!

How could it have happened ? I did nothing recently on that machine.

In quick chat with my friend and Lifetime HCL Ambassador Daniel Nashed he suggested me to install ncdu to see what was eating up my disk. I did so and found out that the /var/lib/docker directory was more than 70 GB! I checked what I had in Docker and found out that all the images from the ST12.0.1 installation were there. That makes sense, since I upgraded my server from 12.0.1 to 12.0.2 and the upgrade does not automatically delete the old images.
I did not bother at the time to delete the images of 12.0.1 but now I did so and the disk is now 40 GB lighter

So my advice is, if you plan to upgrade an existing Sametime server from 12.x to 12.0.2 remember to delete the old images once everything is running fine.