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swarm: OIDC clients registered wherever authelia runs; nats + matrix secrets from bao

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The three client registrations move into glue-{controller,nats,matrix}-oidc-client.nix,
gated only on deploy.authelia.enable and reading their ids from swarm.* options,
so the host running authelia registers every one of them whichever host runs
the service. The matrix callback is a new read-only swarm.matrix.sso.redirectUri,
read by both the homeserver's config and its client entry.

swarm-secret-publish now also publishes the queue's and the homeserver's minted
secrets to swarm/services/<id>/oidc/client. The queue host reads its responder's
secret there with swarm-bao-nats-auth-oidc under the responder's own leaf
(swarm-nats-auth role gains that one read path), and the homeserver's host with
swarm-bao-matrix-oidc under matrix-ctl's leaf (swarm-matrix-ctl role gains its
one read path). The host-file copies are gone: swarm-nats-auth-secrets now
delivers only the callout seeds and the store identity, and
hive-matrix-oidc-secret is removed. A fetch unit whose leaf is unset still
renders and fails naming the option pair.

Closes #4943
This commit is contained in:
atlas 2026-10-05 02:56:18 +02:00 • committed by mara
commit 962da3b784
20 changed files with 702 additions and 293 deletions
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46
nix/host-modules/glue-matrix-oidc-client.nix Normal file
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# Glue: register the swarm's homeserver as an OIDC client wherever authelia
# runs.
#
# ONE PAIRING PER FILE — matrix ← authelia, and nothing else. Deleting this
# leaves a homeserver whose SSO login authelia has never heard of, and no
# minted secret for swarm-secret-publish to put in the store.
#
# ⚠️ Gated on authelia being HERE, and NOT on this host running the
# homeserver. A client is a row in THIS host's provider config, so it is
# declared where that config is rendered; ./hive-matrix.nix's `config` hangs
# off `deploy.matrix.enable`, which answers a question about a different host.
# Same shape as ./glue-grafana-oidc-client.nix.
#
# Registered whether or not the swarm runs a homeserver: nothing in `swarm.*`
# records that. The one swarm-level fact that rules a login out is a null
# `gatewayHost`, which leaves no callback a browser can reach, so that alone
# skips the client.
{
lib,
config,
...
}:
let
hyperhiveCfg = config.services.hyperhive;
deployCfg = hyperhiveCfg.deploy;
matrixCfg = hyperhiveCfg.swarm.matrix;
in
{
config = lib.mkIf (deployCfg.authelia.enable && matrixCfg.sso.redirectUri != null) {
# One declaration, two readers: the callback is the read-only option the
# homeserver's own config renders, so it is spelled once.
services.hyperhive.swarm.authelia.oidc.clients = [
{
id = matrixCfg.sso.clientId;
description = "HyperHive matrix";
redirectUris = [ matrixCfg.sso.redirectUri ];
# tuwunel authenticates at the token endpoint by putting the secret in
# the POST body. Authelia enforces the *registered* method, and its
# default is `client_secret_basic` — so without this the browser flow
# completes, consent is granted, and the last hop fails with a 401
# that names neither the secret nor the redirect.
tokenEndpointAuthMethod = "client_secret_post";
}
];
};
}