# Helix 3-node cluster with Kafka wire protocol.
#
# Usage:
#   cd docker
#   docker-compose up --build -d
#   docker-compose logs -f
#
# Kafka client connections:
#   - Node 1: localhost:9092
#   - Node 2: localhost:9093
#   - Node 3: localhost:9094
#
# Raft peer connections (internal):
#   - Node 1: helix-node1:9001
#   - Node 2: helix-node2:9002
#   - Node 3: helix-node3:9003

services:
  helix-node1:
    build:
      context: ..
      dockerfile: docker/Dockerfile
    container_name: helix-node1
    hostname: helix-node1
    ports:
      - "9092:9092"  # Kafka client API
      - "9001:9001"  # Raft peer (exposed for debugging)
    volumes:
      - helix-data-1:/var/lib/helix
    command:
      - --protocol=kafka
      - --node-id=1
      - --cluster-id=helix-docker-cluster
      - --listen-addr=0.0.0.0:9092
      - --kafka-advertise-addr=helix-node1:9092
      - --raft-addr=0.0.0.0:9001
      - --peer=2:helix-node2:9092:9002
      - --peer=3:helix-node3:9092:9003
      - --data-dir=/var/lib/helix
      - --auto-create-topics
      - --auto-create-partitions=${HELIX_PARTITIONS:-1}
      - --log-level=info
    networks:
      - helix-net
    healthcheck:
      test: ["CMD-SHELL", "nc -z localhost 9092 || exit 1"]
      interval: 10s
      timeout: 5s
      retries: 3
      start_period: 10s

  helix-node2:
    build:
      context: ..
      dockerfile: docker/Dockerfile
    container_name: helix-node2
    hostname: helix-node2
    ports:
      - "9093:9092"  # Kafka client API (mapped to different host port)
      - "9002:9002"  # Raft peer
    volumes:
      - helix-data-2:/var/lib/helix
    command:
      - --protocol=kafka
      - --node-id=2
      - --cluster-id=helix-docker-cluster
      - --listen-addr=0.0.0.0:9092
      - --kafka-advertise-addr=helix-node2:9092
      - --raft-addr=0.0.0.0:9002
      - --peer=1:helix-node1:9092:9001
      - --peer=3:helix-node3:9092:9003
      - --data-dir=/var/lib/helix
      - --auto-create-topics
      - --auto-create-partitions=${HELIX_PARTITIONS:-1}
      - --log-level=info
    networks:
      - helix-net
    depends_on:
      - helix-node1
    healthcheck:
      test: ["CMD-SHELL", "nc -z localhost 9092 || exit 1"]
      interval: 10s
      timeout: 5s
      retries: 3
      start_period: 10s

  helix-node3:
    build:
      context: ..
      dockerfile: docker/Dockerfile
    container_name: helix-node3
    hostname: helix-node3
    ports:
      - "9094:9092"  # Kafka client API
      - "9003:9003"  # Raft peer
    volumes:
      - helix-data-3:/var/lib/helix
    command:
      - --protocol=kafka
      - --node-id=3
      - --cluster-id=helix-docker-cluster
      - --listen-addr=0.0.0.0:9092
      - --kafka-advertise-addr=helix-node3:9092
      - --raft-addr=0.0.0.0:9003
      - --peer=1:helix-node1:9092:9001
      - --peer=2:helix-node2:9092:9002
      - --data-dir=/var/lib/helix
      - --auto-create-topics
      - --auto-create-partitions=${HELIX_PARTITIONS:-1}
      - --log-level=info
    networks:
      - helix-net
    depends_on:
      - helix-node1
      - helix-node2
    healthcheck:
      test: ["CMD-SHELL", "nc -z localhost 9092 || exit 1"]
      interval: 10s
      timeout: 5s
      retries: 3
      start_period: 10s

networks:
  helix-net:
    driver: bridge

volumes:
  helix-data-1:
  helix-data-2:
  helix-data-3: