Integrate with Harbor

What is Harbor

Harbor is an open source container image registry that secures images with role-based access control, scans images for vulnerabilities, and signs images as trusted. A CNCF Graduated project, Harbor delivers compliance, performance, and interoperability to help you consistently and securely manage images across cloud native compute platforms like Kubernetes and Docker.

-- https://goharbor.io

Preparation

The following placeholders are used in this guide:

• harbor.company is the FQDN of the Harbor installation.
• authentik.company is the FQDN of the authentik installation.

:::info This documentation lists only the settings that you need to change from their default values. Be aware that any changes other than those explicitly mentioned in this guide could cause issues accessing your application. :::

authentik configuration

To support the integration of Harbor with authentik, you need to create an application/provider pair in authentik.

Create an application and provider in authentik

1. Log in to authentik as an administrator and open the authentik Admin interface.
2. Navigate to Applications > Applications and click Create with Provider to create an application and provider pair. (Alternatively you can first create a provider separately, then create the application and connect it with the provider.)

• Application: provide a descriptive name, an optional group for the type of application, the policy engine mode, and optional UI settings.

• Choose a Provider type: select OAuth2/OpenID Connect as the provider type.

• Configure the Provider: provide a name (or accept the auto-provided name), the authorization flow to use for this provider, and the following required configurations.

  • Protocol Settings:
    • Redirect URI:
      • Strict: https://harbor.company/c/oidc/callback.
    • Signing Key: select any available signing key.
  • Advanced Protocol Settings:
    • Scopes: add authentik default OAuth Mapping: OpenID 'offline_access' to Selected Scopes.

• Configure Bindings (optional): you can create a binding (policy, group, or user) to manage the listing and access to applications on a user's My applications page.

3. Click Submit to save the new application and provider.

Harbor configuration

To support the integration of authentik with Harbor, you need to configure OIDC authentication.

1. Log in to the Harbor dashboard as an admin.

2. Navigate to Configuration and select the Authentication tab.

3. In the Auth Mode dropdown, select OIDC and provide the following required configurations.

   • OIDC Provider Name: authentik
   • OIDC Endpoint: https://authentik.company/application/o/harbor/
   • OIDC Client ID: client ID from authentik
   • OIDC Client Secret: client secret from authentik
   • Group Claim Name: groups
   • OIDC Scope: openid,profile,email,offline_access
   • Username Claim: preferred_username

4. Click Save.

:::info If you are experiencing redirect errors, ensure that you have set the hostname and external_url fields in your harbor.yml file and run the setup.sh script. :::

Configuration verification

To confirm that authentik is properly configured with Harbor, log out of Harbor, then use the "LOGIN VIA OIDC PROVIDER" button on the login page and verify that Single Sign-On succeeds.