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Configure GitLab OAuth2 authentication

There are numerous authentication methods available in Grafana to verify user identity. The authentication configuration dictates which users can access Grafana and the methods they can use for logging in. You can also configure Grafana to automatically update users’ roles and team memberships in Grafana based on the information returned by the auth provider integration.

When deciding on an authentication method, it’s important to take into account your current identity and access management system as well as the specific authentication and authorization features you require. For a complete list of the available authentication options and the features they support, refer to Configure authentication.

This topic describes how to configure GitLab OAuth2 authentication.

Before you begin

To follow this guide:

Steps

To configure GitLab authentication with Grafana, follow these steps:

  1. Create an OAuth application in GitLab.

    1. Set the redirect URI to http://<my_grafana_server_name_or_ip>:<grafana_server_port>/login/gitlab.

      Ensure that the Redirect URI is the complete HTTP address that you use to access Grafana via your browser, but with the appended path of /login/gitlab.

      For the Redirect URI to be correct, it might be necessary to set the root_url option in the [server]section of the Grafana configuration file. For example, if you are serving Grafana behind a proxy.

    2. Set the OAuth2 scopes to openid, email and profile.

  2. Refer to the following table to update field values located in the [auth.gitlab] section of the Grafana configuration file:

    FieldDescription
    client_id, client_secretThese values must match the client ID and client secret from your GitLab OAuth2 application.
    enabledEnables GitLab authentication. Set this value to true.

    Review the list of other GitLab configuration options and complete them, as necessary.

  3. Optional: Configure a refresh token:

    a. Set use_refresh_token to true in [auth.gitlab] section in Grafana configuration file.

  4. Configure role mapping.

  5. Optional: Configure team synchronization.

  6. Restart Grafana.

    You should now see a GitLab login button on the login page and be able to log in or sign up with your GitLab accounts.

Configuration options

The table below describes all GitLab OAuth configuration options. Like any other Grafana configuration, you can apply these options as environment variables.

SettingRequiredDescriptionDefault
enabledYesWhether GitLab OAuth authentication is allowed.false
client_idYesClient ID provided by your GitLab OAuth app.
client_secretYesClient secret provided by your GitLab OAuth app.
auth_urlYesAuthorization endpoint of your GitLab OAuth provider. If you use your own instance of GitLab instead of gitlab.com, adjust auth_url by replacing the gitlab.com hostname with your own.https://gitlab.com/oauth/authorize
token_urlYesEndpoint used to obtain GitLab OAuth access token. If you use your own instance of GitLab instead of gitlab.com, adjust token_url by replacing the gitlab.com hostname with your own.https://gitlab.com/oauth/token
api_urlNoGrafana uses <api_url>/user endpoint to obtain GitLab user information compatible with OpenID UserInfo.https://gitlab.com/api/v4
nameNoName used to refer to the GitLab authentication in the Grafana user interface.GitLab
iconNoIcon used for GitLab authentication in the Grafana user interface.gitlab
scopesNoList of comma or space-separated GitLab OAuth scopes.openid email profile
allow_sign_upNoWhether to allow new Grafana user creation through GitLab login. If set to false, then only existing Grafana users can log in with GitLab OAuth.true
auto_loginNoSet to true to enable users to bypass the login screen and automatically log in. This setting is ignored if you configure multiple auth providers to use auto-login.false
role_attribute_pathNoJMESPath expression to use for Grafana role lookup. Grafana will first evaluate the expression using the GitLab OAuth token. If no role is found, Grafana creates a JSON data with groups key that maps to groups obtained from GitLab’s /oauth/userinfo endpoint, and evaluates the expression using this data. Finally, if a valid role is still not found, the expression is evaluated against the user information retrieved from api_url/users endpoint and groups retrieved from api_url/groups endpoint. The result of the evaluation should be a valid Grafana role (Viewer, Editor, Admin or GrafanaAdmin). For more information on user role mapping, refer to Configure role mapping.
role_attribute_strictNoSet to true to deny user login if the Grafana role cannot be extracted using role_attribute_path. For more information on user role mapping, refer to Configure role mapping.false
allow_assign_grafana_adminNoSet to true to enable automatic sync of the Grafana server administrator role. If this option is set to true and the result of evaluating role_attribute_path for a user is GrafanaAdmin, Grafana grants the user the server administrator privileges and organization administrator role. If this option is set to false and the result of evaluating role_attribute_path for a user is GrafanaAdmin, Grafana grants the user only organization administrator role. For more information on user role mapping, refer to Configure role mapping.false
skip_org_role_syncNoSet to true to stop automatically syncing user roles.false
allowed_domainsNoList of comma or space-separated domains. User must belong to at least one domain to log in.
allowed_groupsNoList of comma or space-separated groups. The user should be a member of at least one group to log in.
tls_skip_verify_insecureNoIf set to true, the client accepts any certificate presented by the server and any host name in that certificate. You should only use this for testing, because this mode leaves SSL/TLS susceptible to man-in-the-middle attacks.false
tls_client_certNoThe path to the certificate.
tls_client_keyNoThe path to the key.
tls_client_caNoThe path to the trusted certificate authority list.
use_pkceNoSet to true to use Proof Key for Code Exchange (PKCE). Grafana uses the SHA256 based S256 challenge method and a 128 bytes (base64url encoded) code verifier.true
use_refresh_tokenNoSet to true to use refresh token and check access token expiration. The accessTokenExpirationCheck feature toggle should also be enabled to use refresh token.true

Configure a refresh token

Available in Grafana v9.3 and later versions.

When a user logs in using an OAuth provider, Grafana verifies that the access token has not expired. When an access token expires, Grafana uses the provided refresh token (if any exists) to obtain a new access token.

Grafana uses a refresh token to obtain a new access token without requiring the user to log in again. If a refresh token doesn’t exist, Grafana logs the user out of the system after the access token has expired.

By default, GitLab provides a refresh token.

Refresh token fetching and access token expiration check is enabled by default for the GitLab provider since Grafana v10.1.0. If you would like to disable access token expiration check then set the use_refresh_token configuration value to false.

Note

The accessTokenExpirationCheck feature toggle has been removed in Grafana v10.3.0 and the use_refresh_token configuration value will be used instead for configuring refresh token fetching and access token expiration check.

Configure allowed groups

To limit access to authenticated users that are members of one or more GitLab groups, set allowed_groups to a comma or space-separated list of groups.

GitLab’s groups are referenced by the group name. For example, developers. To reference a subgroup frontend, use developers/frontend. Note that in GitLab, the group or subgroup name does not always match its display name, especially if the display name contains spaces or special characters. Make sure you always use the group or subgroup name as it appears in the URL of the group or subgroup.

Configure role mapping

Unless skip_org_role_sync option is enabled, the user’s role will be set to the role retrieved from GitLab upon user login.

The user’s role is retrieved using a JMESPath expression from the role_attribute_path configuration option. To map the server administrator role, use the allow_assign_grafana_admin configuration option. Refer to configuration options for more information.

If no valid role is found, the user is assigned the role specified by the auto_assign_org_role option. You can disable this default role assignment by setting role_attribute_strict = true. This setting denies user access if no role or an invalid role is returned.

To ease configuration of a proper JMESPath expression, go to JMESPath to test and evaluate expressions with custom payloads.

Role mapping examples

This section includes examples of JMESPath expressions used for role mapping.

Map roles using user information from OAuth token

In this example, the user with email admin@company.com has been granted the Admin role. All other users are granted the Viewer role.

ini
role_attribute_path = email=='admin@company.com' && 'Admin' || 'Viewer'

Map roles using groups

In this example, the user from GitLab group ’example-group’ have been granted the Editor role. All other users are granted the Viewer role.

ini
role_attribute_path = contains(groups[*], 'example-group') && 'Editor' || 'Viewer'

Map server administrator role

In this example, the user with email admin@company.com has been granted the Admin organization role as well as the Grafana server admin role. All other users are granted the Viewer role.

bash
role_attribute_path = email=='admin@company.com' && 'GrafanaAdmin' || 'Viewer'

Map one role to all users

In this example, all users will be assigned Viewer role regardless of the user information received from the identity provider.

ini
role_attribute_path = "'Viewer'"
skip_org_role_sync = false

Configure team synchronization

Note: Available in Grafana Enterprise and Grafana Cloud.

By using Team Sync, you can map GitLab groups to teams within Grafana. This will automatically assign users to the appropriate teams. Teams for each user are synchronized when the user logs in.

GitLab groups are referenced by the group name. For example, developers. To reference a subgroup frontend, use developers/frontend. Note that in GitLab, the group or subgroup name does not always match its display name, especially if the display name contains spaces or special characters. Make sure you always use the group or subgroup name as it appears in the URL of the group or subgroup.

To learn more about Team Sync, refer to Configure team sync.

Example of GitLab configuration in Grafana

This section includes an example of GitLab configuration in the Grafana configuration file.

bash
[auth.gitlab]
enabled = true
allow_sign_up = true
auto_login = false
client_id = YOUR_GITLAB_APPLICATION_ID
client_secret = YOUR_GITLAB_APPLICATION_SECRET
scopes = openid email profile
auth_url = https://gitlab.com/oauth/authorize
token_url = https://gitlab.com/oauth/token
api_url = https://gitlab.com/api/v4
role_attribute_path = contains(groups[*], 'example-group') && 'Editor' || 'Viewer'
role_attribute_strict = false
allow_assign_grafana_admin = false
allowed_groups = ["admins", "software engineers", "developers/frontend"]
allowed_domains = mycompany.com mycompany.org
tls_skip_verify_insecure = false
use_pkce = true
use_refresh_token = true