authentik/index.md at 44fe477c3c0cb6538e48341f3e07fc3074adeebc

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Gitea

Support level: Community

What is Gitea

From https://gitea.io/

:::note Gitea is a community managed lightweight code hosting solution written in Go. It is published under the MIT license. :::

:::note This is based on authentik 2021.10.3 and Gitea 1.16.0+rc1 installed using https://docs.gitea.io/en-us/install-from-binary/. Instructions may differ between versions. :::

Preparation

The following placeholders will be used:

authentik.company is the FQDN of authentik.
gitea.company is the FQDN of Gitea.

Step 1

In authentik, create an OAuth2/OpenID Provider (under Resources/Providers) with these settings:

:::note Only settings that have been modified from default have been listed. :::

Protocol Settings

Name: Gitea
Signing Key: Select any available key

:::note Take note of the Client ID and Client Secret, you'll need to give them to Gitea in Step 3. :::

Step 2

In authentik, create an application (under Resources/Applications) which uses this provider. Optionally apply access restrictions to the application using policy bindings.

:::note Only settings that have been modified from default have been listed. :::

Name: Gitea
Slug: gitea-slug
Provider: Gitea

Step 3

Navigate to the Authentication Sources page at https://gitea.company/admin/auths and click Add Authentication Source

Change the following fields

Authentication Name: authentik
OAuth2 Provider: OpenID Connect
Client ID (Key): Step 1
Client Secret: Step 1
Icon URL: https://goauthentik.io/img/icon.png
OpenID Connect Auto Discovery URL: https://authentik.company/application/o/gitea-slug/.well-known/openid-configuration
Additional Scopes: email profile

Add Authentication Source and you should be done. Your Gitea login page should now have a Sign in With followed by the authentik logo which you can click on to sign-in to Gitea with Authentik creds.

Helm Chart Configuration

authentik can be configured automatically in Gitea Kubernetes deployments via it's Helm Chart.

:::note This is based on authentik 2022.8.2, Gitea v17.2, and Gitea Helm Chart v6.0.1. Instructions may differ between versions. :::

Add the following to the Gitea Helm Chart values.yaml file:

gitea:
    oauth:
        - name: "authentik"
          provider: "openidConnect"
          key: "CLIENT_ID_FROM_AUTHENTIK" #Step 1
          secret: "CLIENT_SECRET_FROM_AUTHENTIK" #Step 1
          autoDiscoveryUrl: "https://authentik.company/application/o/gitea-slug/.well-known/openid-configuration"
          iconUrl: "https://goauthentik.io/img/icon.png"
          scopes: "email profile"

Kubernetes Secret

Alternatively you can use a Kubernetes secret to set the key and secret values.

Create a Kubernetes secret with the following:

apiVersion: v1
kind: Secret
metadata:
    name: gitea-authentik-secret
type: Opaque
stringData:
    key: "CLIENT_ID_FROM_AUTHENTIK" #Step 1
    secret: "CLIENT_SECRET_FROM_AUTHENTIK" #Step 1