How to import from tarball backup?

Hi there. I had system on which my GitLab installation resided fail on me but I had a backup of /usr/local/gitlab and I was wondering if it’d be possible to import my previous implementation into the new install.

My previous install was 10.1.0 and the new is 10.2.3. I didn’t know if it’d be possible to simply copy over the old postgres files or if it’d be more complicated than that.

Thank you for any advice!