ci runner: export its built-in metrics through the container's forwarder
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@ -430,6 +430,19 @@ On a host without the store, that leaf is the one file to copy. Registration,
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the container and the threat model are in
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[`../scheduler/ci.md`](../scheduler/ci.md).
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The runner's built-in Prometheus endpoint is on, bound to `127.0.0.1:9101` in
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the container's own network namespace. The container's journal forwarder
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scrapes it (`services.hyperhive.swarmJournalForwarder.extraScrapeTargets`) and
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pushes the series to the swarm collector under the job `gitea-runner`, so
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nothing listens on the bridge. Series, all prefixed `gitea_runner_`:
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`job_running`, `capacity`, `job_capacity_utilization_ratio`, `uptime_seconds`,
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`info` (labels `version` and `name`), `job_total{status}`,
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`job_duration_seconds`, `poll_fetch_total{result}`,
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`poll_fetch_duration_seconds`, `poll_backoff_seconds`, `report_log_*`,
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`report_state_*` and `client_errors_total`. A pull-request job runs in the same
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namespace and can read the endpoint, which carries counts, durations, the
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runner's name and its version, and no secrets.
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### Builder
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The swarm builder, in a `swarm-builder` container on the host that sets
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