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hyperhive/nix/host-modules/glue-bao-readers-policy-order.nix
atlas 0bfe354b6d nix: move the reader-after-policy edges into their own colocation glue
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.
2026-09-24 15:15:15 +02:00

60 lines
2.2 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.
#
# ONE PAIRING PER FILE — the store's four reader policy units ← the readers
# they grant, 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 skips once the bootstrap token
# is gone, and a skipped unit counts as done. `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-matrix-bao-token.nix
swarm-bao-matrix-token =
hyperhiveCfg.enable
&& havePair baoDeploy.matrixTokenClientCertFile baoDeploy.matrixTokenClientKeyFile
&& deployCfg.matrix.enable;
# ./glue-queue-agent-credential.nix
swarm-bao-queue-agent =
hyperhiveCfg.enable
&& havePair baoDeploy.queueAgentClientCertFile baoDeploy.queueAgentClientKeyFile;
# ./swarm-grafana.nix
swarm-bao-grafana-oidc = hyperhiveCfg.enable && deployCfg.grafana.enable;
# ./swarm-otel.nix
swarm-bao-otel-oidc =
deployCfg.swarm-otel.enable
&& havePair baoDeploy.otelOidcClientCertFile baoDeploy.otelOidcClientKeyFile;
};
orderAfterPolicy =
reader: here:
lib.mkIf (baoDeploy.enable && here) {
systemd.services.${reader} = {
after = [ "${reader}-policy.service" ];
wants = [ "${reader}-policy.service" ];
};
};
in
{
config = lib.mkMerge (lib.mapAttrsToList orderAfterPolicy readersHere);
}