Frank
650b6e0281
fix(observability): serve every exporter bind; scrape same-host cadvisor via gateway
...
Two shipped-2026-10-20 bugs that left gpu-dankclaw, gpu-dankserver and
cadvisor-dankclaw DOWN beside a green deploy:
- gpu-exporter.py built one ThreadingHTTPServer per bind but ran
serve_forever() on servers[0] only: the LAN-class socket sat listen()ing
but never accept()ed, loopback deploy gate passed, every scrape that
reached the other bind timed out on the SYN backlog. Now one thread per
extra bind. Regression test spins --serve on two loopback binds and
requires BOTH to answer /metrics.
- cadvisor-dankclaw scraped its own host's LAN IP. Measured from inside the
Prometheus container: a bridge container cannot dial its own host's LAN
address at all (hairpin refuses published ports too); the podman gateway
answers. Target moved to host.containers.internal:8080; the seam that
pinned the LAN address (asserting the wrong doctrine) is re-pinned to the
gateway plus a negative pin against the own-host LAN dial. Observability
page records the measured reachability law replacing the inferred one.
2026-10-21 00:34:17 -07:00
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