Gitlab uses unkown domain for gitlab runners

david4 · July 14, 2023, 12:09pm

Hello,

My GitLab was a bit outdated and i have updated to the latest version 16.1.2, after some usage I’ve found some problems with my runners. The build failed because of some strange URL. I don’t know where this URL is coming from…

Preparing environment
Running on runner-gsobv3-z-project-37-concurrent-0 via 51e7b9d83a15...
Getting source from Git repository
Fetching changes with git depth set to 50...
Reinitialized existing Git repository in /builds/david/repo/.git/
fatal: unable to access 'http://c4bbe1f47248/david/repo.git/': Could not resolve host: c4bbe1f47248
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1

I was trying to add a new runner via https://gitlab.my.com/admin/runners/new , I was redirected to some strange URL, what was also not found. The same URL is visible again when I click on the runner in the list.

Where is this URL configured?

balonik · July 14, 2023, 12:13pm

Let me guess, your GitLab is behind a HTTPS reverse proxy and the “strange url” is id/hostname of the container where GitLab is running

david4 · July 14, 2023, 12:27pm

Yes sir, you are right! I am using a reverse proxy and also the url is the hostname of the container!

How can I fix it?

/edit: I just figured out my gitlab.rb file is completely empty… I guess this happened during the upgrade at some point. I will try to fix that and see how it goes…

balonik · July 14, 2023, 12:33pm

You are not the only one that reported this issue with the new Runner registration method and all you have in common is own reverse proxy
I suppose this is a bug, you can raise this in the GitLab issue tracker or use the old registrationToken method which is hidden behind the “3 dots” menu next to “New runner” button.