groups:

- name: HaproxyExporterV1

  
  rules:

    - alert: HaproxyDown
      expr: 'haproxy_up == 0'
      for: 0m
      labels:
        severity: critical
      annotations:
        summary: HAProxy down (instance {{ $labels.instance }})
        description: "HAProxy down\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: HaproxyHighHttp4xxErrorRateBackend(v1)
      expr: 'sum by (backend) (rate(haproxy_server_http_responses_total{code="4xx"}[1m])) / sum by (backend) (rate(haproxy_server_http_responses_total[1m])) * 100 > 5 and sum by (backend) (rate(haproxy_server_http_responses_total[1m])) > 0'
      for: 1m
      labels:
        severity: critical
      annotations:
        summary: HAProxy high HTTP 4xx error rate backend (v1) (instance {{ $labels.instance }})
        description: "Too many HTTP requests with status 4xx (> 5%) on backend {{ $labels.backend }}\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: HaproxyHighHttp5xxErrorRateBackend(v1)
      expr: 'sum by (backend) (rate(haproxy_server_http_responses_total{code="5xx"}[1m])) / sum by (backend) (rate(haproxy_server_http_responses_total[1m])) * 100 > 5 and sum by (backend) (rate(haproxy_server_http_responses_total[1m])) > 0'
      for: 1m
      labels:
        severity: critical
      annotations:
        summary: HAProxy high HTTP 5xx error rate backend (v1) (instance {{ $labels.instance }})
        description: "Too many HTTP requests with status 5xx (> 5%) on backend {{ $labels.backend }}\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: HaproxyHighHttp4xxErrorRateServer(v1)
      expr: 'sum by (server) (rate(haproxy_server_http_responses_total{code="4xx"}[1m]) * 100) / sum by (server) (rate(haproxy_server_http_responses_total[1m])) > 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 (v1) (instance {{ $labels.instance }})
        description: "Too many HTTP requests with status 4xx (> 5%) on server {{ $labels.server }}\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: HaproxyHighHttp5xxErrorRateServer(v1)
      expr: 'sum by (server) (rate(haproxy_server_http_responses_total{code="5xx"}[1m]) * 100) / sum by (server) (rate(haproxy_server_http_responses_total[1m])) > 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 (v1) (instance {{ $labels.instance }})
        description: "Too many HTTP requests with status 5xx (> 5%) on server {{ $labels.server }}\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: HaproxyServerResponseErrors(v1)
      expr: 'sum by (server) (rate(haproxy_server_response_errors_total[1m]) * 100) / sum by (server) (rate(haproxy_server_http_responses_total[1m])) > 5 and sum by (server) (rate(haproxy_server_http_responses_total[1m])) > 0'
      for: 1m
      labels:
        severity: critical
      annotations:
        summary: HAProxy server response errors (v1) (instance {{ $labels.instance }})
        description: "Too many response errors to {{ $labels.server }} server (> 5%).\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: HaproxyBackendConnectionErrors(v1)
      expr: 'sum by (backend) (rate(haproxy_backend_connection_errors_total[1m])) > 100'
      for: 1m
      labels:
        severity: critical
      annotations:
        summary: HAProxy backend connection errors (v1) (instance {{ $labels.instance }})
        description: "Too many connection errors to {{ $labels.backend }} backend (> 100 req/s). Request throughput may be too high.\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: HaproxyServerConnectionErrors(v1)
      expr: 'sum by (server) (rate(haproxy_server_connection_errors_total[1m])) > 100'
      for: 0m
      labels:
        severity: critical
      annotations:
        summary: HAProxy server connection errors (v1) (instance {{ $labels.instance }})
        description: "Too many connection errors to {{ $labels.server }} server (> 100 req/s). Request throughput may be too high.\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: HaproxyBackendMaxActiveSession
      expr: '((sum by (backend) (haproxy_backend_current_sessions * 100) / sum by (backend) (haproxy_backend_limit_sessions))) > 80 and sum by (backend) (haproxy_backend_limit_sessions) > 0'
      for: 2m
      labels:
        severity: warning
      annotations:
        summary: HAProxy backend max active session (instance {{ $labels.instance }})
        description: "HAProxy backend {{ $labels.backend }} is reaching session limit (> 80%).\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: HaproxyPendingRequests(v1)
      expr: 'sum by (backend) (haproxy_backend_current_queue) > 0'
      for: 2m
      labels:
        severity: warning
      annotations:
        summary: HAProxy pending requests (v1) (instance {{ $labels.instance }})
        description: "Some HAProxy requests are pending on {{ $labels.backend }} backend\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: HaproxyHttpSlowingDown(v1)
      expr: 'avg by (backend) (haproxy_backend_http_total_time_average_seconds) > 1'
      for: 1m
      labels:
        severity: warning
      annotations:
        summary: HAProxy HTTP slowing down (v1) (instance {{ $labels.instance }})
        description: "Average request time is increasing\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: HaproxyRetryHigh(v1)
      expr: 'sum by (backend) (rate(haproxy_backend_retry_warnings_total[1m])) > 10'
      for: 2m
      labels:
        severity: warning
      annotations:
        summary: HAProxy retry high (v1) (instance {{ $labels.instance }})
        description: "High rate of retry on {{ $labels.backend }} backend\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: HaproxyBackendDown
      expr: 'haproxy_backend_up == 0'
      for: 0m
      labels:
        severity: critical
      annotations:
        summary: HAProxy backend down (instance {{ $labels.instance }})
        description: "HAProxy backend is down\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: HaproxyServerDown
      expr: 'haproxy_server_up == 0'
      for: 0m
      labels:
        severity: critical
      annotations:
        summary: HAProxy server down (instance {{ $labels.instance }})
        description: "HAProxy server is down\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: HaproxyFrontendSecurityBlockedRequests(v1)
      expr: 'sum by (frontend) (rate(haproxy_frontend_requests_denied_total[2m])) > 10'
      for: 2m
      labels:
        severity: warning
      annotations:
        summary: HAProxy frontend security blocked requests (v1) (instance {{ $labels.instance }})
        description: "HAProxy is blocking requests for security reason\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

    - alert: HaproxyServerHealthcheckFailure(v1)
      expr: 'increase(haproxy_server_check_failures_total[1m]) > 2'
      for: 0m
      labels:
        severity: warning
      annotations:
        summary: HAProxy server healthcheck failure (v1) (instance {{ $labels.instance }})
        description: "Some server healthcheck are failing on {{ $labels.server }} ({{ $value }} in the last 1m)\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"