#5254 "Traefik — Routers: current routers only, header row, certs on the router they serve".
- Router hosts come from Traefik's API (/api/http|tcp/routers), read
best-effort on each scrape. An optional api_url overrides it; the default
is /api on the metrics host. A certificate's expiry then shows in a TLS
column on the router whose host it covers. An expiring one makes that
router a problem, graded by Settings → Thresholds.
- Only current: routers and certificates must have appeared in the last
three scrapes. Certificates are upserted by serial and never deleted, so
renewed or retired ones lingered on the widget.
- Widget order: verdict, problem routers with the reason, then the busiest
healthy routers under one header (Router / Req/s / Bandwidth / p95 / TLS).
A missing value shows "—".
- If the API is unreachable, expiring certificates are listed after the
routers, not above them.
- The page splits certificates into served (with the routers using each,
plus SANs) and "No longer served".
- Latest row per router: an index walk (recursive CTE + LATERAL) replaces
DISTINCT plus a query per router.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
