I run GitLab CE 14.8.2 on Ubuntu 22.04. There are now packages for 15.5.1, but these will only install if the current GitLab version is at least 15.0. However for Ubuntu 22.04 there is no package for version 15.0, so it seems to me that there is no way to do this.
Am I missing something, or am I stuck with the version I have?
The focal (Ubuntu 20.04) packages works fine on jammy (Ubuntu 22.04), so use those when upgrading to a version before 15.5.
When choosing which versions to include in your upgrade path, consult:
So in general terms the procedure you have to go through:
Configure the focal sources on your server (might already be there)
Upgrade to 14.9.5
Upgrade to 14.10.Z (I don’t remember what the latest version in that series was, and the recommended upgrade path doesn’t say)
Upgrade to 15.0.Z (as above)
Upgrade to 15.4.0 (that’s what the recommended path says. I would probably go for 15.4.3 to avoid the security problems that were in the first releases)
Change the sources to point to the jammy repo of GitLab
Upgrade to 15.5.1 (the newest release at the moment)
As always: Make sure you have a backup before doing an upgrade.