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swarm-victoriametrics: forward the container's journal to the swarm collector

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The metrics store's container now runs the journal forwarder the other
service containers run, pushing to a receiver of its own on the swarm
collector (serviceProducers swarm-victoriametrics) as a new machine OIDC
client (swarm.victoriametrics.otel.clientId), registered by a glue file
wherever authelia runs and published to the store by the secret publisher.

The container keeps its loopback-only netns. The collector cannot dial a
unix socket, so swarm-victoriametrics-egress-relay, a socket-activated
systemd-socket-proxyd inside the container, takes its connections on
127.0.0.1:4380 and passes them to /run/swarm-victoriametrics-egress/egress.sock.
The host's nginx listens there and sends /swarm-victoriametrics/ to the swarm
collector and /api/oidc/token to authelia, both by name and verified, and
refuses every other path. nginx gets ReadWritePaths on that directory and
removes a stale socket before it starts.

The container cannot reach the store, so the client secret is fetched on the
host by swarm-victoriametrics-forwarder-oidc under swarm-metrics-auth's leaf,
the shape swarm-bao-forwarder-oidc has, and bound into the container
read-only. The forwarder module gains hostSecretFile for that: set, it renders
no fetch unit. swarm-metrics-auth's policy gains one read stanza on the
forwarder's client path.

The container drops --link-journal=host, and the host collector stops reading
it.

Also lists the forge publisher's and matrix-ctl's leaves in the forwarder
secrets row of docs/swarm/secrets.md, which the hive-forge/hive-matrix change
missed.
This commit is contained in:
atlas 2026-10-16 12:05:10 +02:00 • committed by mara
commit 7294707d7d
15 changed files with 454 additions and 62 deletions
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2
nix/host-modules/swarm-secret-publisher.nix
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@ -106,6 +106,8 @@ let
hyperhiveCfg.swarm.victorialogs.otel.clientId
hyperhiveCfg.swarm.forge.otel.clientId
hyperhiveCfg.swarm.matrix.otel.clientId
# The metrics store container's journal forwarder, whose host reads it.
hyperhiveCfg.swarm.victoriametrics.otel.clientId
];
# The swarm controller's OIDC client, which it reads back from the store