global:
  smtp_smarthost: '${SMTP_HOST:-smtp.example.com}:${SMTP_PORT:-587}'
  smtp_from: '${SMTP_FROM_ADDRESS:-alerts@example.com}'
  smtp_auth_username: '${SMTP_USERNAME:-}'
  smtp_auth_password: '${SMTP_PASSWORD}'

route:
  receiver: 'default'
  group_by: ['alertname', 'severity', 'category']
  group_wait: 30s
  group_interval: 5m
  repeat_interval: 4h
  routes:
    - match:
        severity: critical
      receiver: 'critical'
      continue: true

receivers:
  - name: 'default'
    email_configs:
      - to: '${ALERT_EMAIL_TO}'
        send_resolved: true
        headers:
          Subject: '[Manage] {{ .GroupLabels.alertname }}'

  - name: 'critical'
    email_configs:
      - to: '${ALERT_EMAIL_TO}'
        send_resolved: true
        headers:
          Subject: '[Manage CRITICAL] {{ .GroupLabels.alertname }}'

  - name: 'webhook'
    webhook_configs:
      - url: '${ALERTMANAGER_WEBHOOK_URL:-http://backend:8000/api/monitoring/alertmanager-webhook}'
        send_resolved: true

inhibit_rules:
  - source_match:
      severity: 'critical'
    target_match:
      severity: 'warning'
    equal: ['alertname', 'instance']