services:
  kafka-1:
    image: confluentinc/cp-kafka:latest
    container_name: kafka-1
    hostname: kafka-1
    ports:
      - "9092:9092"
    environment:
      KAFKA_NODE_ID: 1
      KAFKA_PROCESS_ROLES: broker,controller
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: CONTROLLER:PLAINTEXT,PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka-1:29092,PLAINTEXT_HOST://localhost:9092
      KAFKA_LISTENERS: PLAINTEXT://kafka-1:29092,PLAINTEXT_HOST://0.0.0.0:9092,CONTROLLER://kafka-1:29093
      KAFKA_CONTROLLER_LISTENER_NAMES: CONTROLLER
      KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT
      KAFKA_CONTROLLER_QUORUM_VOTERS: 1@kafka-1:29093,2@kafka-2:29093
      KAFKA_LOG_DIRS: /var/lib/kafka/data
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 2
      KAFKA_GROUP_INITIAL_REBALANCE_DELAY_MS: 0
      CLUSTER_ID: NeEcW4ddRIWWZOxkgFaC4w
      # https://docs.confluent.io/platform/current/multi-dc-deployments/multi-region.html
      # KAFKA_REPLICA_SELECTOR_CLASS: org.apache.kafka.common.replica.RackAwareReplicaSelector
      # KAFKA_BROKER_RACK: rack-1

  kafka-2:
    image: confluentinc/cp-kafka:latest
    container_name: kafka-2
    hostname: kafka-2
    ports:
      - "9093:9092"
    environment:
      KAFKA_NODE_ID: 2
      KAFKA_PROCESS_ROLES: broker,controller
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: CONTROLLER:PLAINTEXT,PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka-2:29092,PLAINTEXT_HOST://localhost:9093
      KAFKA_LISTENERS: PLAINTEXT://kafka-2:29092,PLAINTEXT_HOST://0.0.0.0:9092,CONTROLLER://kafka-2:29093
      KAFKA_CONTROLLER_LISTENER_NAMES: CONTROLLER
      KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT
      KAFKA_CONTROLLER_QUORUM_VOTERS: 1@kafka-1:29093,2@kafka-2:29093
      KAFKA_LOG_DIRS: /var/lib/kafka/data
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 2
      KAFKA_GROUP_INITIAL_REBALANCE_DELAY_MS: 0
      CLUSTER_ID: NeEcW4ddRIWWZOxkgFaC4w