# noble_authentik — Authentik + OIDC for the noble stack

Installs **Authentik** (Helm `goauthentik/authentik`) as the cluster IdP, **oauth2-proxy** as an **OIDC** client to Authentik for Traefik **ForwardAuth** (Prometheus, Alertmanager, Longhorn UI), and re-applies Helm values so **Argo CD**, **Grafana**, and **Headlamp** use **native OIDC** to Authentik (not HTTP BasicAuth).

## Enable

1. Copy repository **`.env.sample`** to **`.env`** and set every **`NOBLE_AUTHENTIK_*`** variable (see comments there).
2. Set **`noble_authentik_install: true`** in **`ansible/inventory/group_vars/all.yml`** (or pass **`-e noble_authentik_install=true`**).
3. Run **`ansible-playbook playbooks/noble.yml --tags authentik`** (or a full **`noble.yml`**) from **`ansible/`** with a working **`KUBECONFIG`**.

`noble_authentik` runs **after** **`noble_platform`** so Grafana / Headlamp / Prometheus exist before SSO Helm upgrades.

## Variables

See **`defaults/main.yml`**. Hostnames default to **`auth.apps.noble.lab.pcenicni.dev`** and **`oauth2.apps.noble.lab.pcenicni.dev`**.

## IdP configuration

When **`noble_authentik_configure_idp`** is true, Ansible runs **`files/configure_authentik.py`** (Python 3, stdlib only) with the bootstrap token to create/update OAuth2 providers and applications for **argocd**, **grafana**, **headlamp**, and **oauth2-proxy**, create **`noble-admins`** / **`noble-editors`**, and add the bootstrap user (by email) to those groups.

## RBAC notes

- **Argo CD:** `noble-admins` group → `role:admin` (see **`clusters/noble/bootstrap/argocd/values-authentik-oidc.yaml`**).
- **Grafana:** `noble-admins` → Admin, `noble-editors` → Editor (see **`values-authentik-oidc.yaml`**).

## Troubleshooting

- Re-run **`configure_authentik.py`** only by executing **`noble.yml`** with **`--tags authentik`** after fixing `.env`.
- If Authentik API calls fail, check flows exist (slug **`default-provider-authorization-implicit-consent`**) and TLS reaches **`AUTHENTIK_API_BASE`**.
- **`GET …/flows/instances/…` → HTTP 403** with **`Token invalid/expired`**: the bootstrap API token is not accepted yet (common right after install: worker still creating it) or **`NOBLE_AUTHENTIK_BOOTSTRAP_TOKEN`** in `.env` does not match the value Helm applied. Re-run **`--tags authentik`** (the role waits for **`GET …/core/applications/`** to return **200** with your token). If you rotated the token in `.env` only, run the play again so Helm picks up the new value, or mint a new API token for **`akadmin`** in the admin UI.
- **`GET …/flows/instances/…` → HTTP 403** with **permission** errors (Authentik **2026+** RBAC): the bearer token’s user must be able to **view flows**. The Helm bootstrap token belongs to **`akadmin`**, which must be in the **`authentik Admins`** group. Add **`akadmin`** to **Directory → Groups → authentik Admins**, or create a new **API token** for `akadmin` after fixing groups, and put that token in **`NOBLE_AUTHENTIK_BOOTSTRAP_TOKEN`**. As a workaround, set **`noble_authentik_oauth_authorization_flow_pk`** and **`noble_authentik_oauth_invalidation_flow_pk`** (both required) to the flows’ **UUID** primary keys from **Admin → Flows** (or `-e` / `group_vars`); the configure script then skips flow list API calls.
- **`/if/admin/` redirects to `/if/user/`** (even as **`akadmin`**): the admin UI only loads when **`canAccessAdmin`** is true. That comes from **`user.isSuperuser`** on **`GET /api/v3/core/users/me/`**, which is **not** the Django username — in Authentik **2026.x** it is derived from **membership in a group with the superuser flag** (bootstrap blueprint: **`authentik Admins`**). If **`isSuperuser`** is false in **`/me`**, `akadmin` is missing that membership or the group’s flag is off. Fix in **Directory → Groups** when you can, or run the worker shell below, then **log out** and sign in again.

### Fix `akadmin` superuser / admin redirect (worker shell)

```bash
kubectl exec -it deploy/authentik-worker -n authentik -- ak shell -c "from authentik.core.models import User, Group; u=User.objects.get(username='akadmin'); adm,_=Group.objects.get_or_create(name='authentik Admins', defaults={'is_superuser': True}); adm.is_superuser=True; adm.save(update_fields=['is_superuser']); adm.users.add(u); u=User.objects.get(pk=u.pk); print('all_groups', list(u.all_groups().values_list('name', flat=True))); print('is_superuser', u.is_superuser)"
```

Then **log out** of Authentik (or use a private window) and sign in again as **`akadmin`**.
- **Grafana / Headlamp / ForwardAuth “Unauthorized” or Authentik “Not found”** (Authentik **2026.x**): OAuth endpoints are no longer under **`/application/o/<app>/oauth2/...`**. Use **issuer discovery** (Grafana **`server_url`** at **`…/application/o/<slug>/`**; oauth2-proxy **`oidc-issuer-url`**; Headlamp **`-oidc-idp-issuer-url`**). Re-apply **Traefik** (**`allowCrossNamespace`** so Ingresses can use Middleware in **`oauth2-proxy`**), **kube-prometheus-stack**, and **Headlamp** after updating values (e.g. **`ansible-playbook playbooks/noble.yml --tags authentik`**).