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Integrate with Gravity

Support level: Community

What is Gravity?​

Gravity is a fully-replicated DNS, DHCP, and TFTP server powered by etcd, offering features like built-in caching, ad/privacy blocking, automatic DNS registration, and metric tracking.

-- https://gravity.beryju.io/

Preparation​

The following placeholders are used in this guide:

  • gravity.company is the FQDN of the Gravity 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.

info

Gravity automatically triggers SSO authentication when configured. To prevent this behavior, log in using the following URL: https://gravity.company/ui/?local.

Access control

Gravity grants OIDC-authenticated users administrative access. Use authentik application bindings or policies to restrict which users can access Gravity.

authentik configuration​

Redirect URI changes in authentik 2026.5

In authentik versions earlier than 2026.5, all Redirect URIs are automatically treated as Authorization type. If you are using one of these older authentik versions, add only the Authorization URL to your Redirect URIs and do not configure a Post Logout URI.

To support the integration of Gravity 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 New Application to open the application wizard.

    • Application: provide a descriptive name, a slug, an optional group for the type of application, the policy engine mode, and optional UI settings. Take note of the Slug value as it will be required later.
    • 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.
      • Note the Client ID and Client Secret values because they will be required later.
      • Add a Redirect URI of type Strict Authorization as https://gravity.company/auth/oidc/callback.
      • Select any available signing key.
    • Configure Bindings (optional): you can create a binding (policy, group, or user) to manage the listing and access to applications on a user's Application Dashboard page.

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

Gravity configuration​

  1. Log in to the Gravity administrative interface.
  2. Navigate to Cluster > Roles and click API.
  3. Under the OIDC section, configure the following values:
  • Issuer: https://authentik.company/application/o/<application_slug>/
  • Client ID: use the Client ID from authentik
  • Client Secret: use the Client Secret from authentik
  • Redirect URL: https://gravity.company/auth/oidc/callback
  1. Click Update to save and apply your configuration.

Configuration verification​

To verify the integration with authentik, log out of Gravity and open Gravity. You should be automatically redirected to authentik.

Resources​