cloudflared binds 127.0.0.1:2000 on the HOST. This process runs in a container
whose only route to the host is the bridge gateway (172.17.0.1), where nothing
is listening — so the check was permanently red regardless of what the tunnel
was actually doing.
Binding the metrics endpoint wider would have fixed the probe and made a
metrics bind failure capable of taking down ingress. That is a worse trade than
losing one row on a dashboard.
The check is not silently dropped: /health/full now carries a 'not_checked_here'
map naming the tunnel and where its health actually lives (systemd
windygit-tunnel). An observer should never have to wonder whether a missing
check means healthy or means forgotten.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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