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nix: re-run the host's store fetches on a ten-minute timer

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Seven host oneshots fetch a secret from the swarm secret store into a file
their consumer loads at start: swarm-bao-grafana-oidc, swarm-bao-otel-oidc,
swarm-bao-matrix-oidc, swarm-bao-ci-runner, swarm-bao-forge-oidc,
swarm-bao-hive-otel-oidc and swarm-bao-forwarder-oidc. Each was
RemainAfterExit with no timer, so it ran at boot or deploy and never again:
a secret re-minted in the store reached its consumer only through an
operator restarting the fetch.

lib/store-refresh-timer.nix gives each one a timer (OnUnitInactiveSec 10min,
RandomizedDelaySec 1min, the agent's own store re-read interval), and each
drops RemainAfterExit so a timer start is not a no-op. Each script already
writes the file only when secret_differs, and refresh_consumer/refresh_unit
restart the consumer only when the file is newer than its last start, so a
run reading an unchanged value restarts nothing.

Two docs said these units do not run on a timer; credentials.md's
ci-runner row said the runner token is not re-pulled.

Part of #5017 (slice T).
This commit is contained in:
atlas 2026-10-12 20:21:17 +02:00 • committed by mara
commit 2f05e2db28
12 changed files with 146 additions and 13 deletions
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2
docs/swarm/credentials.md
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@ -72,7 +72,7 @@ of the cell says how.
| `swarm/hives/<hive>/queue/agent` | authelia | `swarm-bao-queue-agent` on the hive's host, under its own per-hive certificate; no agent's policy reaches it | must be stated | must be stated |
| `swarm/hives/<hive>/oidc/client` | authelia, at its first boot; `swarm-secret-publish` copies it in | hive-c0re, under the hive's own certificate, when it first connects to the queue | ❌ authelia mints it once. A re-mint is republished by `swarm-secret-publish`'s path unit | ❌ read until the first connect succeeds, retried with a backoff of up to five minutes while it's missing; then held until hive-c0re restarts |
| `swarm/services/<clientId>/oidc/client` | authelia | that service's own reader, under its own certificate — the queue responder's under `swarm-nats-auth`'s, the homeserver's under `swarm-matrix-ctl`'s, the forge's under `swarm-forge-publisher`'s, the review classifier's under `swarm-review-classifier`'s; the bao UI's by the store's granter | must be stated | must be stated |
| `swarm/services/ci-runner/registration-token` | `swarm-controller`, from the forge's admin API, at start and in a five-minute pass; its grant on the path is write-only | `swarm-bao-ci-runner` on the runner's host, under the runner's own certificate, into a file only `swarm-ci-runner-register` in the runner's container loads; no other principal's policy reads it | ❌ the forge hands out one token until an admin resets it; the controller writes a reset token within five minutes | ❌ `swarm-bao-ci-runner` reads it when it starts, at boot or deploy, and restarts the runner when the value changed |
| `swarm/services/ci-runner/registration-token` | `swarm-controller`, from the forge's admin API, at start and in a five-minute pass; its grant on the path is write-only | `swarm-bao-ci-runner` on the runner's host, under the runner's own certificate, into a file only `swarm-ci-runner-register` in the runner's container loads; no other principal's policy reads it | ❌ the forge hands out one token until an admin resets it; the controller writes a reset token within five minutes | ✅ `swarm-bao-ci-runner` reads it at boot, on deploy and every ten minutes, and restarts the runner when the value changed |
| `swarm/services/review-classifier/anthropic-api-key` | the operator, by hand in the store's UI, field `api_key` | `swarm-review-classifier` in its container, under its own certificate, at the start of every run; held for that run and handed to `claude`'s environment only; no other principal's policy reads it | ❌ an operator's key; replaced by writing a new one | ✅ read on every run, so a written or removed key takes effect on the next run |
| `swarm/services/review-classifier/forge/token` | `swarm-controller`, with the forge's admin API, for its `review-classifier` account, at start and in a five-minute pass; the secret publisher's policy denies it | `swarm-controller` under its own certificate, before it decides whether to mint, and on every review it posts as the account; the classifier service's policy doesn't read it | ✅ the controller's pass re-mints when the stored token is missing or no longer matches the forge (last eight characters and scopes) | ✅ the controller reads the store on every review it posts |
| _(not in the store)_ a hive's mTLS leaf | the store's own PKI, or an operator placing it by hand | its own client, off disk — the exception above, because it's what makes every other row's pull possible | must be stated | must be stated |