Prometheus Metrics

ANY /metrics is registered only when the app wires a Prometheus handler; otherwise the route is absent and returns 404. Its response is Prometheus exposition, not JSON, and it is outside the Product HTTP contract. Scrapers should use GET.

scrape_configs:
  - job_name: wukongim
    static_configs:
      - targets: ['127.0.0.1:5001']

The endpoint has no built-in authentication and remains readable during restore maintenance. Expose it only on a monitoring network; add TLS and authentication at the outer boundary when crossing an untrusted network. Base alerts on the same release and representative load, including latency percentiles, queues, rejection, drops, and node skew.

Metrics show trends and alerts; they do not alone prove readiness or safe topology mutation. Use /readyz for traffic admission.

"# HELP wukongim_connections Current Gateway sessions\n# TYPE wukongim_connections gauge\nwukongim_connections 42\n"