Enable Authentik installation and add support for extra public hostnames in the configuration. Updated README and values files to reflect changes for improved deployment flexibility and documentation clarity.

ansible/roles/noble_authentik/README.md

@@ -14,6 +14,18 @@ Installs **Authentik** (Helm `goauthentik/authentik`) as the cluster IdP, **oaut
 
 See **`defaults/main.yml`**. Hostnames default to **`auth.apps.noble.lab.pcenicni.dev`** and **`oauth2.apps.noble.lab.pcenicni.dev`**. **`noble_authentik_ensure_admin_ui_access`** (default **true**) re-applies **authentik Admins** superuser membership via the worker on each **`--tags authentik`** run so the admin UI keeps working under **2026+** RBAC.
 
+### Extra public hostname (Pangolin + Newt, same Authentik)
+
+To expose the **same** Authentik instance on an **internet-facing** FQDN (while keeping the lab name on Traefik), set **`noble_authentik_ingress_extra_hosts`** in **`ansible/inventory/group_vars/all.yml`** (or **`-e`**) to a list of extra FQDNs, for example **`auth.example.com`**. Re-run **`ansible-playbook playbooks/noble.yml --tags authentik`**. Ansible extends **`server.ingress.hosts`** and **`tls[0].hosts`** so **cert-manager** issues one certificate with SANs for the primary **`noble_authentik_host`** plus those names (DNS must resolve for your issuer — often **Cloudflare** for public names, split horizon for lab).
+
+Then in **Pangolin**: link the domain, create an **HTTP** resource for that hostname, and set the **target** to your **Newt** site with **`ip:port`** pointing at the cluster **Traefik** HTTPS entry (same pattern as **`clusters/noble/bootstrap/newt/README.md`** — typically the MetalLB / LAN VIP and **443**). One Newt tunnel can front many hostnames.
+
+In **Authentik**, add a **Brand** (or equivalent) for the new hostname if you want different titles/favicon; OAuth **redirect URIs** for each app must include issuer URLs that match what browsers use (often you keep **internal** issuer URLs in cluster apps and use the public URL only for human login, or align all apps to the public issuer — pick one strategy to avoid mixed **`iss`** / callback mismatches).
+
+### “Secondary tenant” (separate PostgreSQL schema — alpha)
+
+Authentik **tenancy** (multiple isolated tenants in one deployment, **`AUTHENTIK_TENANTS__ENABLED`**) is **alpha**, requires **per-tenant Enterprise licensing**, **`AUTHENTIK_TENANTS__API_KEY`**, and **`AUTHENTIK_OUTPOSTS__DISABLE_EMBEDDED_OUTPOST=true`** (embedded outposts are unsupported with tenancy). It is **not** wired in this repo by default. See [Tenancy](https://docs.goauthentik.io/sys-mgmt/tenancy). For most homelabs, **one tenant** plus **`noble_authentik_ingress_extra_hosts`** is the right split.
+
 ## IdP configuration
 
 When **`noble_authentik_configure_idp`** is true, Ansible creates/updates OAuth2 providers and applications for **argocd**, **grafana**, **headlamp**, and **oauth2-proxy** using either the **worker ORM path** (default **`noble_authentik_oidc_provision_via: worker`**: **`kubectl exec`** + **`ak shell`** + **`files/worker_upsert_oauth_oidc.py`**, which avoids **2026+** REST **403** on **`GET …/providers/oauth2/**`) or the **REST-only path** (**`noble_authentik_oidc_provision_via: rest`**: **`files/configure_authentik.py`** needs a token that can list/patch OAuth2 providers). With the worker path and a bootstrap email, it also runs **`files/worker_add_bootstrap_user_groups.py`** so **`User.groups.add`** does not depend on **`GET …/core/users/**`. It then runs **`configure_authentik.py`** with **`AUTHENTIK_SKIP_OIDC_REST`** / **`AUTHENTIK_SKIP_USER_GROUP_REST`** when those worker steps ran, so the script only calls **`ensure_group`** over the API (skipped when **`AUTHENTIK_NOBLE_*_GROUP_PK`** are set).