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3 Reverse proxies and load balancers

1 Nginx

  1. HTTP errors 4xx
  2. HTTP errors 5xx
  3. Nginx latency high

2 Apache

  1. Apache down
  2. Apache workers load
  3. Apache restart

3 HaProxy

Embedded exporter (HAProxy >= v2)

  1. HAProxy high HTTP 4xx error rate backend
  2. HAProxy high HTTP 5xx error rate backend
  3. HAProxy high HTTP 4xx error rate server
  4. HAProxy high HTTP 5xx error rate server
  5. HAProxy server response errors
  6. HAProxy backend connection errors
  7. HAProxy server connection errors
  8. HAProxy backend max active session > 80%
  9. HAProxy pending requests
  10. HAProxy HTTP slowing down
  11. HAProxy retry high
  12. HAproxy has no alive backends
  13. HAProxy frontend security blocked requests
  14. HAProxy server healthcheck failure

prometheus/haproxy_exporter (HAProxy < v2)

  1. HAProxy down
  2. HAProxy high HTTP 4xx error rate backend
  3. HAProxy high HTTP 5xx error rate backend
  4. HAProxy high HTTP 4xx error rate server
  5. HAProxy high HTTP 5xx error rate server
  6. HAProxy server response errors
  7. HAProxy backend connection errors
  8. HAProxy server connection errors
  9. HAProxy backend max active session
  10. HAProxy pending requests
  11. HAProxy HTTP slowing down
  12. HAProxy retry high
  13. HAProxy backend down
  14. HAProxy server down
  15. HAProxy frontend security blocked requests
  16. HAProxy server healthcheck failure

4 Traefik

ExporterV2: observability/metrics/prometheus/

  1. Traefik service down
  2. Traefik high HTTP 4xx error rate service
  3. Traefik high HTTP 5xx error rate service

ExporterV1: observability/metrics/prometheus/

  1. Traefik backend down
  2. Traefik backend errors
  3. Traefik high HTTP 5xx error rate backend