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hyperhive/nix/host-modules/glue-bao-readers-policy-order.nix
atlas 121c4678aa swarm-controller reads its forge token from the store, not a host file
The controller's forge token never entered bao: the forge minted it in its
container, hive-forge-swarm-controller-token copied it to a host file, and the
controller LoadCredential'ed that file. forgeTokenFile defaulted to that path
only where the forge ran, so a controller on any other host had no forge
access unless an operator copied the file by hand.

Now the forge's host publishes it and the controller reads it:

- swarm-bao-forge-publisher (replaces hive-forge-swarm-controller-token)
  waits for the in-container token, logs in with its own forge-publisher leaf
  and writes it to swarm/controller/swarm-controller/forge/token. It runs on
  every forge container start, the old unit's trigger.
- New principal swarm-forge-publisher: leaf minted by glue-bao-tls.nix,
  policy create/update on that one path, written by
  swarm-bao-forge-publisher-policy, CN reserved as a hive name.
- The controller policy gains read on that path. swarm-controller reads it
  at start under its own certificate with the OIDC secret's retry, and runs
  without forge access if it still cannot.
- forgeTokenFile, its LoadCredential and the forgeEnv gate are gone;
  SWARM_CONTROLLER_FORGE_URL is always set. hostSwarmControllerTokenFile is
  removed, and a tmpfiles rule deletes the old host copy on the forge host.

The in-container file stays: the mint unit's only-once guard reads it, and
it is the publisher's source.

Refs #4998
2026-10-08 13:25:47 +02:00

90 lines
3.5 KiB
Nix

# Glue: where the store and one of its readers share a host, the reader waits
# for the unit that writes the cert-auth role it logs in with, and for any
# other policy unit whose rules it relies on.
#
# ONE PAIRING PER FILE — the store's policy units ← the readers that rely
# on them, and nothing else. Deleting this leaves every reader as it is on a
# host whose store is remote: it may log in before its role exists, and its own
# retries are what carry it past that.
#
# ⚠️ Gated on BOTH the store and that reader being here. Off the store's host
# there is no local policy unit to order against. On the store's host without
# the reader, setting `systemd.services.<reader>.after` would define a unit
# with no ExecStart, so each gate below restates the one the reader's own
# module puts on it. A reader whose gate changes must change here too.
#
# Ordering, never a requirement: a policy unit that failed still counts as
# done, and the reader's own retries carry it past that. `wants` as well as
# `after`, so a reader started on its own pulls its policy unit into the same
# transaction.
{
lib,
config,
...
}:
let
hyperhiveCfg = config.services.hyperhive;
deployCfg = hyperhiveCfg.deploy;
baoDeploy = deployCfg.bao;
havePair = cert: key: cert != null && key != null;
# Reader unit → the gate its own module defines it under.
readersHere = {
# ./glue-queue-agent-credential.nix
swarm-bao-queue-agent =
deployCfg.hive-controller.enable
&& havePair baoDeploy.queueAgentClientCertFile baoDeploy.queueAgentClientKeyFile;
# ./swarm-grafana.nix
swarm-bao-grafana-oidc = deployCfg.grafana.enable;
# ./swarm-otel.nix
swarm-bao-otel-oidc =
deployCfg.swarm-otel.enable
&& havePair baoDeploy.otelOidcClientCertFile baoDeploy.otelOidcClientKeyFile;
# ./swarm-bao.nix: its block is gated on the store, which `orderAfterPolicies`
# already checks.
swarm-bao-forwarder-oidc = true;
# ./swarm-nats.nix: the queue's TLS leaf, not a secret, but the same wait.
swarm-bao-nats-tls = deployCfg.nats.enable;
# ./swarm-ci-runner.nix
swarm-bao-ci-runner = deployCfg.ci-runner.enable;
# ./hive-forge/default.nix
swarm-bao-forge-publisher = deployCfg.forgejo.enable;
};
# Readers that log in under another unit's principal: reader unit → the
# gate its own module defines it under, and the policy units it waits for.
readersOfOtherPolicy = {
# ./swarm-nats.nix, under the queue responder's leaf. Also after the
# publisher's policy, which denies the publisher the callout seeds' paths:
# until it is written the publisher may create them, and this unit keeps
# a seed it finds there.
swarm-bao-nats-callout-xkey = {
here = deployCfg.nats.enable;
policies = [
"swarm-bao-nats-auth-policy"
"swarm-bao-secret-publisher-policy"
];
};
# ./hive-matrix.nix, under matrix-ctl's leaf.
swarm-bao-matrix-oidc = {
here = deployCfg.matrix.enable;
policies = [ "swarm-bao-matrix-ctl-policy" ];
};
};
orderAfterPolicies =
reader: here: policies:
lib.mkIf (baoDeploy.enable && here) {
systemd.services.${reader} = {
after = map (p: "${p}.service") policies;
wants = map (p: "${p}.service") policies;
};
};
in
{
config = lib.mkMerge (
lib.mapAttrsToList (reader: here: orderAfterPolicies reader here [ "${reader}-policy" ]) readersHere
++ lib.mapAttrsToList (reader: r: orderAfterPolicies reader r.here r.policies) readersOfOtherPolicy
);
}