Apache 2.4 + Gitlab Omnibus (CE) with a relative URL: 404 (not found), 422 (The change you requested was rejected)

It’s been a painful month battling with this and I’m too tired to document everything thoroughly, so I’ll just throw this out there:

# "Note this config assumes unicorn is listening on default port 8080 and
# gitlab-workhorse is listening on port 8181."

Alias /lab "/opt/gitlab/embedded/service/gitlab-rails/public"

<Directory /opt/gitlab/embedded/service/gitlab-rails/public>
    Include conf-available/geoblock-non-fi.conf
    Options -MultiViews
    #DirectoryIndex disabled

<Location /lab>
    Include conf-available/geoblock-non-fi.conf
    ErrorDocument 404 /404.html
    ErrorDocument 422 /422.html
    ErrorDocument 500 /500.html
    ErrorDocument 502 /502.html
    ErrorDocument 503 /503.html

    RequestHeader set X-Forwarded-Proto https
    Header set Strict-Transport-Security: "max-age=15768000;includeSubdomains"

    ProxyPass ""
    ProxyPassReverse ""

That one disabled line (#DirectoryIndex disabled) was required (uncommented) when I used the RewriteRules version of the recipe, otherwise it was 404 whenever logging in.

You also obviously need to either out-comment “Include conf-available/geoblock-non-fi.conf” or add your own geoblocking rules in the file it references.