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swarm-secret-client: hives no longer read swarm/services/*

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The hive policy rendered by policy::render granted every hive cert read
on secret/data/swarm/services/*, which holds each swarm service's OIDC
client secret. No reader of that tree authenticates with a hive cert:
grafana, the otel collector and the store forwarder each read with
their own leaf, and the bao UI's secret is read by the store's granter.

render() now emits two stanzas: swarm/agents/* and the hive's own
swarm/hives/<hive>/*. Kind::Service had no other caller and is removed.
Docs and comments that described the grant as a decision are rewritten
to the current state.

Closes #4960
This commit is contained in:
atlas 2026-10-04 22:32:28 +02:00 • committed by mara
commit 2505008b83
13 changed files with 82 additions and 136 deletions
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3
nix/host-modules/swarm-grafana.nix
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@ -238,8 +238,7 @@ let
hostSecretPath = "/var/lib/nixos-containers/${cfg.machine}${secretPath}";
hostSecretDir = builtins.dirOf hostSecretPath;
# Where the publisher on authelia's host leaves this client's secret. The
# `services` segment is `swarm-secret-client`'s `path::Kind::Service` — a
# Where the publisher on authelia's host leaves this client's secret. A
# swarm service's client is registered once for the whole swarm, so its
# secret is one value and not one per hive. Both ends compose this from the
# same swarm-wide client id, so a rename cannot leave one of them behind.