rancher-gitlab-proxy

Authenticate Rancher users from Gitlab instance. Uses proxy simulating GitHub API translating calls to Gitlab API

All credits goes to https://sandstorm.de/de/blog/post/making-rancher-2-and-gitlab-oauth-authentication-work-together.html

It is now not required to fill RANCHER_URL env variable. Rancher url is auto-detected from requests now. You can this way use same gitlab instance for several Rancher instances! :-)

Tested with Gitlab 15 and Rancher 2.6

Installation using docker

1. Run wpjsro/rancher-gitlab-proxy:latest Docker image next to Gitlab. Set GITLAB_URL, see example docker-compose.yaml.
2. Configure Gitlab - add config option from gitlab.rb
3. Create Gitlab application with read_api scope and https://<RANCHER_URL>/verify-auth redirect URL
4. Configure Rancher to use GitHub authentication, set enterprise host to your Gitlab url, fill in Application ID and Secret from Gitlab.
5. Working Gitlab Rancher authentication :-)