docs: correct Grafana Authentik SSO facts

The vault claimed the fork property-mapping evaluator was broken and userinfo
returned only sub, so email could never reach Grafana (outcome unverified). That
was a misdiagnosis: the real causes were the NULL authorization_flow (the
NoneType.slug crash) and the email scope mapping returning a bare string rather
than a dict. Record the four verified causes and fixes, point to the repair
script and the new landing spec, and drop the unverified caveat.
This commit is contained in:
Frank
2026-10-20 20:40:15 -07:00
parent 200039d589
commit afe72781bc
2 changed files with 50 additions and 32 deletions
@@ -81,7 +81,7 @@ Two provisioning rules, each verified live by an outage:
appears. Create the Application with `provider_id` set (the UI does this
automatically; raw API/ORM drives must do it explicitly).
## OAuth2 relying-party quirks (this fork, verified live 2026-08-31)
## OAuth2 relying-party quirks (this fork; corrected live 2026-10-20)
The Grafana RP provider (`grafana`, pk 9, confidential client) was created and
verified end-to-end via `ak shell` ORM drives. This fork's OAuth2 provider
@@ -100,23 +100,32 @@ implementation diverges from upstream in ways that bit us; all verified live:
- **Provider resolution is by `client_id` query param** on the global
`/application/o/authorize/` route; per-slug authorize paths do not exist in
this build. Token/userinfo live at `/application/o/token/` and
`/application/o/userinfo/?api=1`.
- **Property-mapping evaluator is broken → userinfo returns `sub` only.**
`PropertyMappingEvaluator.evaluate(*args, **kwargs)` forwards kwargs to
`BaseEvaluator.evaluate(expression_source)`, so the first context kwarg
becomes the *expression source* instead of the context; every call raises a
swallowed `PropertyMappingExpressionException` and the claim is skipped.
Scope-grant filtering has the same class of bug: `ScopeMapping` has no
provider FK (linkage lives in the `ProviderPropertyMapping` through model)
so `filter(provider=...)` always yields an empty queryset and tokens asked
to carry scopes get zero. Net effect: userinfo/introspection answers with
`{sub}` only — email/groups/entitlements claims cannot be delivered by this
build until the evaluator is patched or upgraded. Clients consuming this
provider must key identity off `sub`.
- Scope mappings for this provider exist — `grafana-email-scope` and
`grafana-profile-scope` are both rows in `authentik_core_propertymapping`
(read-only `SELECT`, 2026-10-18) — and will start emitting claims the moment
the evaluator bug is fixed; no config change is needed then.
`/application/o/userinfo/` — do **not** append `?api=1` to a Grafana API URL.
- **NULL `authorization_flow` → authorize 500, `AttributeError: 'NoneType'
object has no attribute 'slug'`.** A provider created via raw `ak shell`
`create()` leaves `authorization_flow` unset; the authorize view then crashes
building the flow planner (`flows/planner.py`) and returns "Server Error —
Powered by authentik" before any claim is built. This was previously
mis-attributed to a broken evaluator; the crash is the missing flow. Fix: set
`authorization_flow = default-provider-authorization-implicit-consent` (the
flow every other provider in this instance already uses).
- **A scope mapping that returns a non-dict emits no claim.** authentik merges a
granted scope mapping's evaluated result into the token **as a mapping**: a
dict contributes its keys as claims; a bare string is keyed under the
mapping's NAME, so nothing usable appears. `grafana-email-scope` returned the
bare string `user.email`, so no `email` claim landed — the evaluator was
never broken (the dict-valued `grafana-profile-scope` mapping has always
delivered, and the stock OpenID mappings return dicts). Fix:
`return {"email": user.email, "email_verified": True}`. With no email, Grafana
v13 falls back to GET `<api_url>/emails`; authentik 404s it → "Login failed:
InternalError".
- **Claims ride in the id_token.** `include_claims_in_id_token` is on for this
provider and Grafana reads identity from it (`USE_ID_TOKEN=true`).
- **Net (2026-10-20):** the evaluator is fine; email/profile claims reach RP
clients. Both IdP fixes are idempotent in `scripts/authentik-grafana-sso-fix.sh`
(re-run after an ak-shell re-creation of the provider or a blueprint import,
which revert them). Grafana's half + the verified outcome (Viewer,
`login = <sub hex>`, email present) are in [[Grafana]].
## LDAP provider objects (provisioned via `ak shell` ORM)
+23 -14
View File
@@ -4,7 +4,7 @@ description: "Grafana visualizes the metrics that Prometheus collects from every
tags:
- infrastructure
- grafana
timestamp: 2026-09-11
timestamp: 2026-10-20
---
# Grafana
@@ -64,19 +64,28 @@ Grafana responds on `/api/health` with 200 and `"database":"ok"`; measured 2026-
- Change the default admin credentials at first boot (env or UI).
- Dashboards provisioned as code (dashboard JSON plus a YAML provider, `shared/grafana/provisioning/dashboards/`) survive container recreation; UI-created ones live in the data volume — back it up.
- **Auth = OAuth2 relying-party, not auth_proxy.** The embedded outpost carries
no provider token (`token=None`), so no identity header ever reaches Grafana;
RP mode is topology-independent. The full verified contract (provider pk 9,
client_id `grafana-21ca190cde75d60f`, global authorize/token/userinfo paths,
Basic client auth, form-encoded token body, and the fork's userinfo-claims
bug that leaves identity at the `sub` hash only) is in
[[Authentik Outpost Reference]] → "OAuth2 relying-party quirks". Consequences for Grafana:
The unit sets `ALLOW_SIGN_UP=false`, `AUTO_UPSERT=true`, `ALLOW_ASSIGN_ORG=true`
`ORG_ID=1` and **no** role-attribute mapping (`grafana.container:52-55`), so
users land as Viewer with `login = <sub hex>`; no email/groups/role claims
reach Grafana until the evaluator bug is fixed — do not write role mappings
that depend on those claims. The local admin account stays the only Admin.
(The Viewer-default outcome and the `<sub hex>` login are not readable from
the host without the database or an admin password. *(unverified 2026-10-18)*)
no provider token (`token=None`), so no identity header reaches Grafana; the
login is Grafana's own "Sign in with Authentik" button against the `grafana`
confidential-client provider. **Verified end-to-end 2026-10-20** after four
independent breakages had made it fail. The two Authentik-side causes (a NULL
`authorization_flow` → authorize 500; an email scope mapping that returned a
bare string so no `email` claim was emitted) and the full wire contract live in
[[Authentik Outpost Reference]] → "OAuth2 relying-party quirks"; the IdP half is
re-applied by `scripts/authentik-grafana-sso-fix.sh` (idempotent — re-run after
an ak-shell re-creation of the provider or a blueprint import, both of which
revert it silently). The Grafana half is the unit's own env (`grafana.container`):
`SCOPES="openid email profile"` (a GitLab-style `user:email` scope crashes the
authorize view), `USE_ID_TOKEN=true` + no `?api=1` (Grafana v13 otherwise GETs
`<api_url>/emails`, which authentik 404s and the login dies with "Login failed:
InternalError"), attribute paths `email`/`sub`/`preferred_username`, and
`ALLOW_SIGN_UP=true` — safe because the guard fronts every request, so the
callback is unreachable to unauthenticated traffic.
- **What a new login becomes:** a Viewer in org 1 (`ALLOW_ASSIGN_ORG=true`,
`ORG_ID=1`, no role-attribute mapping), with `login = <sub hex>` but the real
`email`. The local admin account stays the only Admin. The landing that the
edge-only 13-sso spec never checked is now asserted by
`tests/e2e/specs/20-grafana-sso.spec.ts` (RP round-trip → `/api/user` 200 with
an email).
- **Never point this unit's `EnvironmentFile` at the repo-root `.env`.** That
file is a gluetun env file and it carries `HOME=/root`; systemd imports it
for the service, podman then looks for its configuration under `/root`