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This page contains SRE related topics for GitLab. For GitLab application specific information, please see https://www.mediawiki.org/wiki/GitLab (under Implementation).
GitLab is reachable at https://gitlab.wikimedia.org/. We run multiple instances of GitLab:
- gitlab1001 runs production GitLab serving https://gitlab.wikimedia.org/
- gitlab2001 runs a passive GitLab replica serving https://gitlab-replica.wikimedia.org/ (WIP)
- gitlab-ansible-test in WMCS gitlab-test project serving https://gitlab-test.wmcloud.org/
gitlab1001 and gitlab2001 are setup using puppet and Ansible. The base configuration currently lives in profile::gitlab. Additional GitLab specific configuration comes from gitlab-ansible. Its planned to migrate all of the logic to puppet and drop Ansible (see T283076). GitLab is installed as a Omnibus installation on all instances. So all GitLab components are installed using the official packages and are executed on a single host. The reasons for this setup can be found in the Initialization docs in Mediawiki.
GitLab login is implemented with SSO using the CAS/SSO. So users will be redirected to idp.wikimedia.org to login to the SSO portal. Authentication is currently open to all users with a Wikimedia developer account.
For our current and future runner setups, see GitLab/Gitlab Runner.