The harness now reads swarm/agents/<agent>/queue from the store itself,
under the agent's own store certificate, and holds it in memory only.
It reads once before the first connect and again on every reconnect
attempt (async-nats `ConnectOptions::with_auth_callback`), so an agent
whose secret was re-minted reconnects with the new value instead of
being refused until the container restarts.
hive-agent-queue-credential.service, the /run file it wrote, and
HIVE_AGENT_QUEUE_AGENT_SECRET_FILE are gone; queue-identity.nix now
hands hive-agent.service the store address, its certificate paths and
the agent name.
A failed or empty read before the first connect still falls back to
the hive's shared client. Each read is bounded by a 10s timeout, and
retries wait out the existing reconnect backoff (500ms doubling, capped
at 60s).
Closes#4783
Every agent on a hive authenticates to the swarm queue with the same
hive-scoped OIDC client, so at the auth callout one agent is
indistinguishable from its co-hived neighbours. The commit before this
one mints a secret per agent at swarm level into
secret/swarm/agents/<agent>/queue; nothing read it.
Read it here, and read it from the container itself. A hive courier in
the path would be the hive vouching for which agent this is, which is
the property a per-agent credential exists to remove -- so the agent
logs in to the store with the certificate hive-agent-bao-identity
already proves it can log in with, and reads its own path. The store
certificate is for reaching the store and nothing else: what the new
unit writes to /run is the secret it read back, and nothing hands a
BAO_CLIENT_* path to anything queue-shaped.
The read needs no policy change. render_agent grants read on
secret/data/swarm/agents/<agent>/*, which covers this path and the
bao-mtls one beside it alike -- which is also why this unit degrades
where the identity check fails. A refusal this unit sees and that check
did not cannot be a policy that drifted; it is an object not yet minted,
the ordinary state of every agent created before its swarm knew to mint
one.
The harness resolves the path and reports which credential this agent
can present. It does not yet present it: the auth-callout responder
still verifies only the hive-scoped token, and an agent offering a
credential nothing on the other end reads back would simply be refused.
Teaching swarm-nats-auth to read the same path is the next slice.
The single module-eval derivation forced ~62 full nixosSystem
fixtures live at once to compute its cases list: 10.6GB peak RSS /
5m25s to evaluate, by far the dominant cost in nix flake check.
Splits it into 21 independent checks.module-eval-* derivations
(1-7 fixtures each) sharing builders/helpers via module-eval/lib.nix,
so no single derivation needs more than a handful of fixtures live
at once. A few cases spanning two clusters carry a small duplicated
fixture rather than threading shared state through lib.nix.
