critical
4.3.1.1. HAProxy high HTTP 4xx error rate backend
Too many HTTP requests with status 4xx (> 5%) on backend {{ $labels.proxy }}
- alert: HAProxyHighHTTP4xxErrorRateBackend
expr: ((sum by (proxy) (rate(haproxy_server_http_responses_total{code="4xx"}[1m])) / sum by (proxy) (rate(haproxy_server_http_responses_total[1m]))) * 100) > 5 and sum by (proxy) (rate(haproxy_server_http_responses_total[1m])) > 0
for: 1m
labels:
severity: critical
annotations:
summary: HAProxy high HTTP 4xx error rate backend (instance {{ $labels.instance }})
description: "Too many HTTP requests with status 4xx (> 5%) on backend {{ $labels.proxy }}\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" critical
4.3.1.2. HAProxy high HTTP 5xx error rate backend
Too many HTTP requests with status 5xx (> 5%) on backend {{ $labels.proxy }}
- alert: HAProxyHighHTTP5xxErrorRateBackend
expr: ((sum by (proxy) (rate(haproxy_server_http_responses_total{code="5xx"}[1m])) / sum by (proxy) (rate(haproxy_server_http_responses_total[1m]))) * 100) > 5 and sum by (proxy) (rate(haproxy_server_http_responses_total[1m])) > 0
for: 1m
labels:
severity: critical
annotations:
summary: HAProxy high HTTP 5xx error rate backend (instance {{ $labels.instance }})
description: "Too many HTTP requests with status 5xx (> 5%) on backend {{ $labels.proxy }}\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" critical
4.3.1.3. HAProxy high HTTP 4xx error rate server
Too many HTTP requests with status 4xx (> 5%) on server {{ $labels.server }}
- alert: HAProxyHighHTTP4xxErrorRateServer
expr: ((sum by (server) (rate(haproxy_server_http_responses_total{code="4xx"}[1m])) / sum by (server) (rate(haproxy_server_http_responses_total[1m]))) * 100) > 5 and sum by (server) (rate(haproxy_server_http_responses_total[1m])) > 0
for: 1m
labels:
severity: critical
annotations:
summary: HAProxy high HTTP 4xx error rate server (instance {{ $labels.instance }})
description: "Too many HTTP requests with status 4xx (> 5%) on server {{ $labels.server }}\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" critical
4.3.1.4. HAProxy high HTTP 5xx error rate server
Too many HTTP requests with status 5xx (> 5%) on server {{ $labels.server }}
- alert: HAProxyHighHTTP5xxErrorRateServer
expr: ((sum by (server) (rate(haproxy_server_http_responses_total{code="5xx"}[1m])) / sum by (server) (rate(haproxy_server_http_responses_total[1m]))) * 100) > 5 and sum by (server) (rate(haproxy_server_http_responses_total[1m])) > 0
for: 1m
labels:
severity: critical
annotations:
summary: HAProxy high HTTP 5xx error rate server (instance {{ $labels.instance }})
description: "Too many HTTP requests with status 5xx (> 5%) on server {{ $labels.server }}\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" critical
4.3.1.5. HAProxy server response errors
Too many response errors to {{ $labels.server }} server (> 5%).
- alert: HAProxyServerResponseErrors
expr: (sum by (server) (rate(haproxy_server_response_errors_total[1m])) / sum by (server) (rate(haproxy_server_http_responses_total[1m]))) * 100 > 5 and sum by (server) (rate(haproxy_server_http_responses_total[1m])) > 0
for: 1m
labels:
severity: critical
annotations:
summary: HAProxy server response errors (instance {{ $labels.instance }})
description: "Too many response errors to {{ $labels.server }} server (> 5%).\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" critical
4.3.1.6. HAProxy backend connection errors
Too many connection errors to {{ $labels.proxy }} backend (> 100 req/s). Request throughput may be too high.
- alert: HAProxyBackendConnectionErrors
expr: (sum by (proxy) (rate(haproxy_backend_connection_errors_total[1m]))) > 100
for: 1m
labels:
severity: critical
annotations:
summary: HAProxy backend connection errors (instance {{ $labels.instance }})
description: "Too many connection errors to {{ $labels.proxy }} backend (> 100 req/s). Request throughput may be too high.\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" critical
4.3.1.7. HAProxy server connection errors
Too many connection errors to {{ $labels.proxy }} (> 100 req/s). Request throughput may be too high.
- alert: HAProxyServerConnectionErrors
expr: (sum by (proxy) (rate(haproxy_server_connection_errors_total[1m]))) > 100
for: 0m
labels:
severity: critical
annotations:
summary: HAProxy server connection errors (instance {{ $labels.instance }})
description: "Too many connection errors to {{ $labels.proxy }} (> 100 req/s). Request throughput may be too high.\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" warning
4.3.1.8. HAProxy backend max active session > 80%
Session limit from backend {{ $labels.proxy }} reached 80% of limit - {{ $value | printf "%.2f"}}%
- alert: HAProxyBackendMaxActiveSession>80%
expr: (haproxy_backend_current_sessions / haproxy_backend_limit_sessions * 100) > 80 and haproxy_backend_limit_sessions > 0
for: 2m
labels:
severity: warning
annotations:
summary: HAProxy backend max active session > 80% (instance {{ $labels.instance }})
description: "Session limit from backend {{ $labels.proxy }} reached 80% of limit - {{ $value | printf \"%.2f\"}}%\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" warning
4.3.1.9. HAProxy pending requests
Some HAProxy requests are pending on {{ $labels.proxy }} - {{ $value | printf "%.2f"}}
# haproxy_backend_current_queue is a gauge (current queue depth), not a counter.
- alert: HAProxyPendingRequests
expr: sum by (proxy) (haproxy_backend_current_queue) > 0
for: 2m
labels:
severity: warning
annotations:
summary: HAProxy pending requests (instance {{ $labels.instance }})
description: "Some HAProxy requests are pending on {{ $labels.proxy }} - {{ $value | printf \"%.2f\"}}\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" warning
4.3.1.10. HAProxy HTTP slowing down
HAProxy backend max total time is above 1s on {{ $labels.proxy }} - {{ $value | printf "%.2f"}}s
- alert: HAProxyHTTPSlowingDown
expr: avg by (instance, proxy) (haproxy_backend_max_total_time_seconds) > 1
for: 1m
labels:
severity: warning
annotations:
summary: HAProxy HTTP slowing down (instance {{ $labels.instance }})
description: "HAProxy backend max total time is above 1s on {{ $labels.proxy }} - {{ $value | printf \"%.2f\"}}s\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" warning
4.3.1.11. HAProxy retry high
High rate of retry on {{ $labels.proxy }} - {{ $value | printf "%.2f"}}
- alert: HAProxyRetryHigh
expr: sum by (proxy) (rate(haproxy_backend_retry_warnings_total[1m])) > 10
for: 2m
labels:
severity: warning
annotations:
summary: HAProxy retry high (instance {{ $labels.instance }})
description: "High rate of retry on {{ $labels.proxy }} - {{ $value | printf \"%.2f\"}}\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" critical
4.3.1.12. HAproxy has no alive backends
HAProxy has no alive active or backup backends for {{ $labels.proxy }}
- alert: HAproxyHasNoAliveBackends
expr: haproxy_backend_active_servers + haproxy_backend_backup_servers == 0
for: 0m
labels:
severity: critical
annotations:
summary: HAproxy has no alive backends (instance {{ $labels.instance }})
description: "HAProxy has no alive active or backup backends for {{ $labels.proxy }}\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" warning
4.3.1.13. HAProxy frontend security blocked requests
HAProxy is blocking requests for security reason
- alert: HAProxyFrontendSecurityBlockedRequests
expr: sum by (proxy) (rate(haproxy_frontend_denied_connections_total[2m])) > 10
for: 2m
labels:
severity: warning
annotations:
summary: HAProxy frontend security blocked requests (instance {{ $labels.instance }})
description: "HAProxy is blocking requests for security reason\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" warning
4.3.1.14. HAProxy server healthcheck failure
Some server healthcheck are failing on {{ $labels.server }} ({{ $value }} in the last 1m)
- alert: HAProxyServerHealthcheckFailure
expr: increase(haproxy_server_check_failures_total[1m]) > 2
for: 0m
labels:
severity: warning
annotations:
summary: HAProxy server healthcheck failure (instance {{ $labels.instance }})
description: "Some server healthcheck are failing on {{ $labels.server }} ({{ $value }} in the last 1m)\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" 
