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otel: stop handing hive-c0re the upstream auth credential

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hive-c0re's container-resource exporter already targets this hive's own
collector (environment.nix derives the bridge address), so the upstream
header it was loaded with has nowhere to be presented: that hop is
unauthenticated for every producer on the host, and the credential
belongs to the swarm tier, which is the one that leaves the swarm.

Drop the LoadCredential entry and the auth_headers() reader with it.
The option itself stays -- swarm-otel.nix is its real consumer, via
EnvironmentFile on the collector unit.

Also corrects three descriptions that this makes false, or that were
already false: the module doc claimed to reuse the config "Claude Code's
in-container SDK export uses", which stopped being true when agents
moved off that path; the nix comment claimed the secret is "the same one
the agent containers get, forwarded via nspawn --load-credential", which
lost its last producer earlier; and docs/observability.md described an
Authorization header on a hop that will no longer send one. The
headersCredential option's own docs already said it reaches "neither an
agent container nor a hive's own collector" -- this makes that true
rather than aspirational.
This commit is contained in:
atlas 2026-08-18 23:06:14 +02:00 • committed by mara
commit 5ca5433e0b
3 changed files with 27 additions and 50 deletions
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13
docs/observability.md
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@ -256,10 +256,9 @@ reference above); custom per-data-point labels can be passed with
When OTEL is enabled, **hive-c0re itself** also exports each agent
container's resource load — the same cgroup gauges shown on the dashboard
LOAD tab — to the configured `endpoint`, reusing the same
`services.hyperhive.otel` config (no separate toggle). These come from the
host, not the in-container Claude SDK, so they cover containers even when
their agent is idle.
LOAD tab — to this hive's own collector, exactly like an agent does and with
no separate toggle. These come from the host, not the in-container Claude SDK,
so they cover containers even when their agent is idle.
Emitted via the OpenTelemetry Rust SDK, using the
[semconv `container.*`](https://opentelemetry.io/docs/specs/semconv/system/container-metrics/)
@ -284,9 +283,9 @@ labels (`hive`, `swarm`, …) ride on the resource via
`extraResourceAttributes`.
Cadence follows `metricIntervalMs` (default 60s). Transport is OTLP/HTTP
(JSON) to `<endpoint>`; the auth header is loaded onto hive-c0re's own unit
via systemd `LoadCredential` (from the same `headersCredential` file) and
sent as `Authorization`.
(JSON) to the hive collector's bridge address, with no auth header — that
first hop is unauthenticated for every producer on this host, and the upstream
credential stays on the swarm tier.
## Agent-emitted custom metrics (`hive-metric`)