# Kafka Cluster with Metrics as the focus
apiVersion: kafka.strimzi.io/v1beta1
kind: Kafka
metadata:
  name: kafka-cluster
  namespace: tls-kafka
spec:
  kafkaExporter:
    topicRegex: ".*"
    groupRegex: ".*"
    logging: debug
    enableSaramaLogging: true
  kafka:
    version: 2.5.0
    replicas: 3
    listeners:
      plain: {}
      external:
        type: loadbalancer
        tls: true  # TLS encryption - default true
    config:
      offsets.topic.replication.factor: 3
      transaction.state.log.replication.factor: 3
      transaction.state.log.min.isr: 2
      log.message.format.version: "2.5"
    storage:
      type: jbod
      volumes:
      - id: 0
        class: managed-premium
        type: persistent-claim
        size: 64Gi
        deleteClaim: false
    metrics:
      # Inspired by config from Kafka 2.0.0 example rules:
      # https://github.com/prometheus/jmx_exporter/blob/master/example_configs/kafka-2_0_0.yml
      lowercaseOutputName: true
      rules:
      # Special cases and very specific rules
      - pattern : kafka.server<type=(.+), name=(.+), clientId=(.+), topic=(.+), partition=(.*)><>Value
        name: kafka_server_$1_$2
        type: GAUGE
        labels:
          clientId: "$3"
          topic: "$4"
          partition: "$5"
      - pattern : kafka.server<type=(.+), name=(.+), clientId=(.+), brokerHost=(.+), brokerPort=(.+)><>Value
        name: kafka_server_$1_$2
        type: GAUGE
        labels:
          clientId: "$3"
          broker: "$4:$5"
      # Some percent metrics use MeanRate attribute
      # Ex) kafka.server<type=(KafkaRequestHandlerPool), name=(RequestHandlerAvgIdlePercent)><>MeanRate
      - pattern: kafka.(\w+)<type=(.+), name=(.+)Percent\w*><>MeanRate
        name: kafka_$1_$2_$3_percent
        type: GAUGE
      # Generic gauges for percents
      - pattern: kafka.(\w+)<type=(.+), name=(.+)Percent\w*><>Value
        name: kafka_$1_$2_$3_percent
        type: GAUGE
      - pattern: kafka.(\w+)<type=(.+), name=(.+)Percent\w*, (.+)=(.+)><>Value
        name: kafka_$1_$2_$3_percent
        type: GAUGE
        labels:
          "$4": "$5"
      # Generic per-second counters with 0-2 key/value pairs
      - pattern: kafka.(\w+)<type=(.+), name=(.+)PerSec\w*, (.+)=(.+), (.+)=(.+)><>Count
        name: kafka_$1_$2_$3_total
        type: COUNTER
        labels:
          "$4": "$5"
          "$6": "$7"
      - pattern: kafka.(\w+)<type=(.+), name=(.+)PerSec\w*, (.+)=(.+)><>Count
        name: kafka_$1_$2_$3_total
        type: COUNTER
        labels:
          "$4": "$5"
      - pattern: kafka.(\w+)<type=(.+), name=(.+)PerSec\w*><>Count
        name: kafka_$1_$2_$3_total
        type: COUNTER
      # Generic gauges with 0-2 key/value pairs
      - pattern: kafka.(\w+)<type=(.+), name=(.+), (.+)=(.+), (.+)=(.+)><>Value
        name: kafka_$1_$2_$3
        type: GAUGE
        labels:
          "$4": "$5"
          "$6": "$7"
      - pattern: kafka.(\w+)<type=(.+), name=(.+), (.+)=(.+)><>Value
        name: kafka_$1_$2_$3
        type: GAUGE
        labels:
          "$4": "$5"
      - pattern: kafka.(\w+)<type=(.+), name=(.+)><>Value
        name: kafka_$1_$2_$3
        type: GAUGE
      # Emulate Prometheus 'Summary' metrics for the exported 'Histogram's.
      # Note that these are missing the '_sum' metric!
      - pattern: kafka.(\w+)<type=(.+), name=(.+), (.+)=(.+), (.+)=(.+)><>Count
        name: kafka_$1_$2_$3_count
        type: COUNTER
        labels:
          "$4": "$5"
          "$6": "$7"
      - pattern: kafka.(\w+)<type=(.+), name=(.+), (.+)=(.*), (.+)=(.+)><>(\d+)thPercentile
        name: kafka_$1_$2_$3
        type: GAUGE
        labels:
          "$4": "$5"
          "$6": "$7"
          quantile: "0.$8"
      - pattern: kafka.(\w+)<type=(.+), name=(.+), (.+)=(.+)><>Count
        name: kafka_$1_$2_$3_count
        type: COUNTER
        labels:
          "$4": "$5"
      - pattern: kafka.(\w+)<type=(.+), name=(.+), (.+)=(.*)><>(\d+)thPercentile
        name: kafka_$1_$2_$3
        type: GAUGE
        labels:
          "$4": "$5"
          quantile: "0.$6"
      - pattern: kafka.(\w+)<type=(.+), name=(.+)><>Count
        name: kafka_$1_$2_$3_count
        type: COUNTER
      - pattern: kafka.(\w+)<type=(.+), name=(.+)><>(\d+)thPercentile
        name: kafka_$1_$2_$3
        type: GAUGE
        labels:
          quantile: "0.$4"
  zookeeper:
    replicas: 3
    storage:
      type: persistent-claim
      class: managed-premium
      size: 32Gi
      deleteClaim: false
    metrics:
      # Inspired by Zookeeper rules
      # https://github.com/prometheus/jmx_exporter/blob/master/example_configs/zookeeper.yaml
      lowercaseOutputName: true
      rules:
      # replicated Zookeeper
      - pattern: "org.apache.ZooKeeperService<name0=ReplicatedServer_id(\\d+)><>(\\w+)"
        name: "zookeeper_$2"
        type: GAUGE
      - pattern: "org.apache.ZooKeeperService<name0=ReplicatedServer_id(\\d+), name1=replica.(\\d+)><>(\\w+)"
        name: "zookeeper_$3"
        type: GAUGE
        labels:
          replicaId: "$2"
      - pattern: "org.apache.ZooKeeperService<name0=ReplicatedServer_id(\\d+), name1=replica.(\\d+), name2=(\\w+)><>(Packets\\w+)"
        name: "zookeeper_$4"
        type: COUNTER
        labels:
          replicaId: "$2"
          memberType: "$3"
      - pattern: "org.apache.ZooKeeperService<name0=ReplicatedServer_id(\\d+), name1=replica.(\\d+), name2=(\\w+)><>(\\w+)"
        name: "zookeeper_$4"
        type: GAUGE
        labels:
          replicaId: "$2"
          memberType: "$3"
      - pattern: "org.apache.ZooKeeperService<name0=ReplicatedServer_id(\\d+), name1=replica.(\\d+), name2=(\\w+), name3=(\\w+)><>(\\w+)"
        name: "zookeeper_$4_$5"
        type: GAUGE
        labels:
          replicaId: "$2"
          memberType: "$3"
      # standalone Zookeeper
      - pattern: "org.apache.ZooKeeperService<name0=StandaloneServer_port(\\d+)><>(\\w+)"
        type: GAUGE
        name: "zookeeper_$2"
      - pattern: "org.apache.ZooKeeperService<name0=StandaloneServer_port(\\d+), name1=InMemoryDataTree><>(\\w+)"
        type: GAUGE
        name: "zookeeper_$2"
  entityOperator:
    topicOperator: {}
    userOperator: {}