We have quite old (13.*) Gitlab instance running on premises. It is not exposed so pretty safe but it is time to upgrade to the latest version. According to this page: Upgrading GitLab | GitLab we cannot jump straight to the latest version but have to do interim upgrades - 6 altogether (doesn’t look good).
So the upgrade in pseudo-code would look like:
for V in GitLabVersions(A B C D E F)  upgrade from CURRENT to V  check if V is working correctly  CURRENT = V
Of course the upgrade step  is quite time consuming but pretty well documented
However I am more interested in the “check” step  - is there an easy way I can check that all Gitlab components upgraded and are working correctly ?
Did anyone followed the multiple-upgrades-at-once path ?