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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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45
nix/host-modules/glue-nats-oidc-client.nix Normal file
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# Glue: register the swarm queue as an OIDC client wherever authelia runs.
#
# ONE PAIRING PER FILE — swarm-nats ← authelia, and nothing else. Deleting this
# leaves a queue responder whose introspection calls authelia refuses, so it
# denies every client, 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 queue. A
# client is a row in THIS host's provider config, so it is declared where that
# config is rendered; ./swarm-nats.nix's `config` hangs off
# `deploy.nats.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 queue: nothing in `swarm.*` records
# that, so the cost of a swarm without one is one unused client and one unused
# minted secret.
{
lib,
config,
...
}:
let
hyperhiveCfg = config.services.hyperhive;
deployCfg = hyperhiveCfg.deploy;
natsCfg = hyperhiveCfg.swarm.nats;
in
{
config = lib.mkIf deployCfg.authelia.enable {
services.hyperhive.swarm.authelia.oidc.clients = [
{
id = natsCfg.clientId;
description = "HyperHive swarm queue";
# `client_credentials`: a queue's clients are daemons with nobody to
# redirect, and no redirect URI exists.
#
# ⚠️ `kind` says that, and an empty `redirectUris` does NOT: authelia
# permits only the grants a client names, and an omitted `grant_types`
# means authorization-code alone. Introspection, which is all the
# responder calls, works either way, so the token endpoint's
# `unauthorized_client` is the only place a wrong kind shows.
kind = "machine";
}
];
};
}