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Using GitLab SSO on a self-hosted instance of Infisical requires configuring an OAuth application in GitLab and registering your instance with it.
1

Create an OAuth application in GitLab

Navigate to your user Settings > Applications to create a new GitLab application. Create the application. As part of the form, set the Redirect URI to https://your-domain.com/api/v1/sso/gitlab. Note that only read_user is required as part of the Scopes configuration.
If you have a GitLab group, you can create an OAuth application under it in your group Settings > Applications.
2

Add your OAuth application credentials to Infisical

Obtain the Application ID and Secret for your GitLab application.Back in your Infisical instance, make sure to set the following environment variables:
  • CLIENT_ID_GITLAB_LOGIN: The Client ID of your GitLab application.
  • CLIENT_SECRET_GITLAB_LOGIN: The Secret of your GitLab application.
  • (optional) URL_GITLAB_LOGIN: The URL of your self-hosted instance of GitLab where the OAuth application is registered. If no URL is passed in, this will default to https://gitlab.com.
  • AUTH_SECRET: A secret key used for signing and verifying JWT. This can be a random 32-byte base64 string generated with openssl rand -base64 32.
  • SITE_URL: The URL of your self-hosted instance of Infisical - should be an absolute URL including the protocol (e.g. https://app.infisical.com)
Once added, restart your Infisical instance and log in with GitLab.

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FAQ

It is likely that you have misconfigured your self-hosted instance of Infisical. You should:
  • Check that you have set the CLIENT_ID_GITLAB_LOGIN, CLIENT_SECRET_GITLAB_LOGIN, AUTH_SECRET, and SITE_URL environment variables.
  • Check that the Redirect URI specified in GitLab matches the SITE_URL environment variable. For example, if the former is https://app.infisical.com/api/v1/sso/gitlab then the latter should be https://app.infisical.com.