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Grafana Cloud Enterprise Open source

Configure Keycloak OAuth2 authentication

Keycloak OAuth2 authentication allows users to log in to Grafana using their Keycloak credentials. This guide explains how to set up Keycloak as an authentication provider in Grafana.

Refer to Generic OAuth authentication for extra configuration options available for this provider.

Note

If Users use the same email address in Keycloak that they use with other authentication providers (such as Grafana.com), you need to do additional configuration to ensure that the users are matched correctly. Please refer to the Using the same email address to login with different identity providers documentation for more information.

You may have to set the root_url option of [server] for the callback URL to be correct. For example in case you are serving Grafana behind a proxy.

Example config:

ini 
[auth.generic_oauth]
enabled = true
name = Keycloak-OAuth
allow_sign_up = true
client_id = YOUR_APP_CLIENT_ID
client_secret = YOUR_APP_CLIENT_SECRET
scopes = openid email profile offline_access roles
email_attribute_path = email
login_attribute_path = username
name_attribute_path = full_name
auth_url = https://<PROVIDER_DOMAIN>/realms/<REALM_NAME>/protocol/openid-connect/auth
token_url = https://<PROVIDER_DOMAIN>/realms/<REALM_NAME>/protocol/openid-connect/token
api_url = https://<PROVIDER_DOMAIN>/realms/<REALM_NAME>/protocol/openid-connect/userinfo
role_attribute_path = contains(roles[*], 'admin') && 'Admin' || contains(roles[*], 'editor') && 'Editor' || 'Viewer'

As an example, <PROVIDER_DOMAIN> can be keycloak-demo.grafana.org and <REALM_NAME> can be grafana.

To configure the kc_idp_hint parameter for Keycloak, you need to change the auth_url configuration to include the kc_idp_hint parameter. For example if you want to hint the Google identity provider:

ini 
auth_url = https://<PROVIDER_DOMAIN>/realms/<REALM_NAME>/protocol/openid-connect/auth?kc_idp_hint=google

Note

api_url is not required if the id_token contains all the necessary user information and can add latency to the login process. It is useful as a fallback or if the user has more than 150 group memberships.

Keycloak configuration

  1. Create a client in Keycloak with the following settings:
  • Client ID: grafana-oauth
  • Enabled: ON
  • Client Protocol: openid-connect
  • Access Type: confidential
  • Standard Flow Enabled: ON
  • Implicit Flow Enabled: OFF
  • Direct Access Grants Enabled: ON
  • Root URL: <grafana_root_url>
  • Valid Redirect URIs: <grafana_root_url>/login/generic_oauth
  • Web Origins: <grafana_root_url>
  • Admin URL: <grafana_root_url>
  • Base URL: <grafana_root_url>

As an example, <grafana_root_url> can be https://play.grafana.org. Non-listed configuration options can be left at their default values.

  1. In the client scopes configuration, Assigned Default Client Scopes should match:
email
offline_access
profile
roles

Warning

These scopes do not add group claims to the id_token. Without group claims, group synchronization will not work. Group synchronization is covered further down in this document.
  1. For role mapping to work with the example configuration above, you need to create the following roles and assign them to users:
admin
editor
viewer

Group synchronization

Note

Available in Grafana Enterprise and Grafana Cloud.

By using group synchronization, you can link your Keycloak groups to teams and roles within Grafana. This allows automatically assigning users to the appropriate teams or granting them the mapped roles. This is useful if you want to give your users access to specific resources based on their group membership. Teams and roles get synchronized when the user logs in.

To enable group synchronization, you need to add a groups mapper to the client configuration in Keycloak. This will add the groups claim to the id_token. You can then use the groups claim to map groups to teams and roles in Grafana.

  1. In the client configuration, head to Mappers and create a mapper with the following settings:
  • Name: Group Mapper
  • Mapper Type: Group Membership
  • Token Claim Name: groups
  • Full group path: OFF
  • Add to ID token: ON
  • Add to access token: OFF
  • Add to userinfo: ON
  1. In Grafana’s configuration add the following option:
ini 
[auth.generic_oauth]
groups_attribute_path = groups

If you use nested groups containing special characters such as quotes or colons, the JMESPath parser can perform a harmless reverse function so Grafana can properly evaluate nested groups. The following example shows a parent group named Global with nested group department that contains a list of groups:

ini 
[auth.generic_oauth]
groups_attribute_path = reverse("Global:department")

To learn more about how to configure group synchronization, refer to Configure team sync and Configure group attribute sync documentation.

Enable Single Logout

To enable Single Logout, you need to add the following option to the configuration of Grafana:

ini 
[auth.generic_oauth]
signout_redirect_url = https://<PROVIDER_DOMAIN>/auth/realms/<REALM_NAME>/protocol/openid-connect/logout?post_logout_redirect_uri=https%3A%2F%2F<GRAFANA_DOMAIN>%2Flogin

As an example, <PROVIDER_DOMAIN> can be keycloak-demo.grafana.org, <REALM_NAME> can be grafana and <GRAFANA_DOMAIN> can be play.grafana.org.

Note

Grafana supports ID token hints for single logout. Grafana automatically adds the id_token_hint parameter to the logout request if it detects OAuth as the authentication method.

Allow assigning Grafana Admin

If the application role received by Grafana is GrafanaAdmin , Grafana grants the user server administrator privileges.

This is useful if you want to grant server administrator privileges to a subset of users. Grafana also assigns the user the Admin role of the default organization.

ini 
role_attribute_path = contains(roles[*], 'grafanaadmin') && 'GrafanaAdmin' || contains(roles[*], 'admin') && 'Admin' || contains(roles[*], 'editor') && 'Editor' || 'Viewer'
allow_assign_grafana_admin = true

Configure refresh token

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.

To enable a refresh token for Keycloak, do the following:

  1. Extend the scopes in [auth.generic_oauth] with offline_access.

  2. Add use_refresh_token = true to [auth.generic_oauth] configuration.