docker-compose.yml

version: '3'
services:

  # Kafka hizmeti, Kafka sunucusunu baslatir.
  kafka:
    image: confluentinc/cp-kafka:latest
    container_name: kafka-broker
    depends_on:
      - zookeeper  # Kafka'nin calisabilmesi icin ZooKeeper hizmetine baglidir.
    ports:
      - 59092:59092  # Kafka'ya disaridan erisim saglar.
    environment:
      KAFKA_BROKER_ID: 1
      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181  # Kafka'nin ZooKeeper ile iletisim kurmasini saglar.
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:9092,PLAINTEXT_HOST://localhost:59092
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
      KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1  # Offset konularinin cogaltma faktorunu ayarlar.

  # ZooKeeper hizmeti, Kafka icin koordinasyon ve konfigurasyon depolama saglar.
  zookeeper:
    image: confluentinc/cp-zookeeper:latest
    container_name: zookeeper
    environment:
      ZOOKEEPER_CLIENT_PORT: 2181
      ZOOKEEPER_TICK_TIME: 2000
      ZK_SERVER_HEAP: "-Xmx256M -Xms256M"  # ZooKeeper'in bellek yapilandirmalarini belirler.
    ports:
      - 52181:2181  # ZooKeeper'a disaridan erisim saglar.

  # Kafka Connect hizmeti, Kafka veri akislarini kaydetmek ve islemek icin kullanilir.
  kafka_connect:
    container_name: kafka_connect
    image: debezium/connect
    links:
      - db
      - kafka
    ports:
      - '8083:8083'  # Kafka Connect REST API'ya disaridan erisim saglar.
    environment:
      - BOOTSTRAP_SERVERS=kafka:9092  # Kafka sunucusuna baglanma ayarlarini tanimlar.
      - GROUP_ID=medium_debezium
      - CONFIG_STORAGE_TOPIC=my_connect_configs
      - OFFSET_STORAGE_TOPIC=my_connect_offsets
      - STATUS_STORAGE_TOPIC=my_connect_statuses

  # Kafka UI hizmeti, Kafka kumesini izlemek ve yonetmek icin bir kullanici arayuzu saglar.
  kafka-ui:
    container_name: kafka-ui
    image: provectuslabs/kafka-ui:latest
    ports:
      - "9091:8080"  # Kafka UI'ya disaridan erisim saglar.
    restart: always
    depends_on:
      - kafka
      - zookeeper
    environment:
      - KAFKA_CLUSTERS_0_NAME=local
      - KAFKA_CLUSTERS_0_BOOTSTRAPSERVERS=kafka:9092
      - KAFKA_CLUSTERS_0_ZOOKEEPER=zookeeper:2181

  # Veritabani hizmeti, ornek bir PostgreSQL veritabanini baslatir.
  db:
    image: debezium/example-postgres
    restart: always
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: toor
    ports:
      - 5432:5432  # PostgreSQL veritabanina disaridan erisim saglar.
    extra_hosts:
      - "host.docker.internal:host-gateway"
    command:
      - "postgres"
      - "-c"
      - "wal_level=logical"
    volumes:
      - ./init.sql:/docker-entrypoint-initdb.d/create-db-tables.sql  # Ilk veritabani tablolarini olusturan SQL dosyasini yukler.

  # Adminer hizmeti, veritabani yonetim arayuzu saglar.
  adminer:
    image: adminer
    restart: always
    ports:
      - 8001:8080  # Adminer'a disaridan erisim saglar.