prometheus:
  serverFiles:
    alerts:
      groups:
      - name: KafkaAlerts
        rules:
        - alert: BrokerOverLoaded
          expr: avg(sum by(brokerId, kafka_cr, kubernetes_namespace) (rate(kafka_network_requestmetrics_requests_total[15m]))) > 30
          for: 5m
          labels:
            severity: alert
          annotations:
            description: 'broker {{ $labels.brokerId }} overloaded (current value is: {{ $value }})'
            summary: 'broker overloaded'
            # If brokerConfigGroup is defined it will override scaled broker config
            # brokerConfigGroup: 'default_group'
            storageClass: 'standard'
            mountPath: '/kafkalog'
            diskSize: '2G'
            image: 'wurstmeister/kafka:2.12-2.3.0'
            command: 'upScale'
        - alert: BrokerUnderReplicated
          expr: kafka_server_replicamanager_underreplicatedpartitions > 0
          for: 5m
          labels:
            severity: alert
          annotations:
            description: 'broker {{ $labels.brokerId }} underreplicated'
            summary: 'broker underreplicated'
            storageClass: 'standard'
            mountPath: '/kafkalog'
            diskSize: '2G'
            image: 'wurstmeister/kafka:2.12-2.3.0'
            command: 'upScale'
        - alert: PartitionCountHigh
          expr: max(kafka_server_replicamanager_partitioncount)  by (kubernetes_namespace, kafka_cr) > 100
          for: 3m
          labels:
            severity: alert
          annotations:
            description: 'broker {{ $labels.brokerId }} has high partition count'
            summary: 'high partition count'
            storageClass: 'standard'
            mountPath: '/kafkalog'
            diskSize: '2G'
            image: 'wurstmeister/kafka:2.12-2.3.0'
            command: 'upScale'
        - alert: PartitionCountLow
          expr: min(kafka_server_replicamanager_partitioncount)  by (kubernetes_namespace, kafka_cr) < 40
          for: 3m
          labels:
            severity: alert
          annotations:
            description: 'broker {{ $labels.brokerId }} has low partition count'
            summary: 'low partition count'
            command: 'downScale'
        - alert: RemainingDiskSpaceLow
          expr: kubelet_volume_stats_available_bytes{persistentvolumeclaim=~"kafka-.*"} < 1 * 1000 * 1000 * 1000
          for: 2m
          labels:
            severity: alert
          annotations:
            description: 'broker {{ $labels.brokerId }} has low disk space'
            summary: 'low diskspace'
            storageClass: 'standard'
            mountPath: '/kafkalog'
            diskSize: '2G'
            command: 'addPVC'