`swarm-bao-forwarder-oidc` fetches the store container's collector secret,
one path, and was the last reader still logging in with
`deploy.bao.clientCertFile`: the hive's own leaf, whose policy reads every
agent's credentials, the hive's tree and every service's OIDC secret. The
four-way split gave grafana's and the swarm collector's readers leaves of
their own and left this one behind.
It now holds `forwarder-oidc.pem`, minted by `swarm-bao-pki`, and logs in
under the `swarm-forwarder-oidc` cert-auth role, whose policy reads
`secret/data/swarm/services/<store forwarder client id>/oidc/client` and
nothing else. The role is written by `swarm-bao-forwarder-oidc-policy`
from the bootstrap token, which gains the two grants that unit calls, and
the reader is ordered after it. The subject is reserved as a hive name. A
store host whose pair is null is refused at eval rather than falling back
to the hive's leaf.
The hive's own role and `client.pem` are untouched; nothing is revoked.
The queue listened in plaintext on 4222, reached by bridge IP or loopback,
and nothing in-tree opened it to another hive. It now has a name, serves a
certificate for that name alone, and refuses clients that do not speak TLS.
- `swarm.nats.domain`, default `nats.<swarm.domain>`, a sibling name like
`swarm.bao.domain`. The queue host answers it via `gateway.localNames`;
every other hive resolves it through the operator's DNS, as for bao.
- `pki/roles/swarm-nats` allows that one name (bare domain, no subdomains,
IPs or localhost, server flag). A `swarm-nats` cert-auth role and policy
may only `update` `pki/issue/swarm-nats`, written by
`swarm-bao-nats-tls-policy`. The login leaf is minted by glue-bao-tls and
paired by glue-nats-bao-identity. `deploy.bao.natsCommonName` is reserved
as a hive name.
- `swarm-bao-nats-tls` issues the leaf into a directory bound read-only into
the container, restarts nats when it rotates, and re-runs daily.
It joins glue-bao-readers-policy-order, so it is ordered after its policy
unit (`after` and `wants`, never `requires`) where the store is on the
same host. The policy unit joins the store's journald list.
- nats gets `tls {}`, with the key via `LoadCredential`, and no
`allow_non_tls`. `validateConfig` is now off in every mode, because the
build-time check loads a leaf that only exists at runtime.
- 4222 is also open on `wg-hive` when the host is on the mesh, never
host-wide.
- `statusPublish.natsUrl`, `queue.agentNatsUrl`, the controller's URL under
`singleHostSwarm`, and the auth responder all dial
`tls://<swarm.nats.domain>:<port>`. swarm-queue-client hands its CA file
to the NATS connection too, so hive-c0re and the controller trust the
leaf's root.
- docs/swarm/README.md: the queue URL and the one DNS record a multi-host
swarm needs.
module-eval-nats-tls pins the role, the policy, the served leaf, the
firewall, the ordering, and a scan of every `*_NATS_URL` and the
responder's URL across the host and its containers.
Closes#4626
The four readers' ordering after their policy units only applies where
the store and that reader share a host, so it is colocation glue and
does not belong in the reader modules (two of which are main modules).
glue-bao-readers-policy-order.nix now sets the after+wants edges, gated
on deploy.bao.enable AND the reader's own gate, so a store host without
a reader gains no stub unit.
