docker-compose.yml

version: '3.8'  # Define a versão da especificação do Docker Compose

services:
  # ======================
  # Bancos de Dados
  # ======================

  postgres:  # Instância principal do PostgreSQL
    image: postgres:15
    container_name: postgres
    restart: always
    ports:
      - "5432:5432"  # Porta padrão do PostgreSQL
    environment:
      POSTGRES_PASSWORD: example
    networks:
     - backend
      

  mysql:  # Banco MySQL
    image: mysql:8
    container_name: mysql
    restart: always
    ports:
      - "3306:3306"
    environment:
      MYSQL_ROOT_PASSWORD: example
    networks:
      - backend

  mongodb:  # Banco MongoDB
    image: mongo:6
    container_name: mongodb
    restart: always
    ports:
      - "27017:27017"
    networks:
      - backend

  redis:  # Banco Redis (chave-valor em memória)
    image: redis:7
    container_name: redis
    restart: always
    ports:
      - "6379:6379"
    networks:
      - backend

  cassandra:  # Banco Cassandra (NoSQL distribuído)
    image: cassandra:4
    container_name: cassandra
    restart: always
    ports:
      - "9042:9042"
    networks:
      - backend

  influxdb:  # Banco InfluxDB (séries temporais)
    image: influxdb:2
    container_name: influxdb
    restart: always
    ports:
      - "8086:8086"
    networks:
      - backend

  elasticsearch:  # Elasticsearch para indexação/buscas
    image: docker.elastic.co/elasticsearch/elasticsearch:8.12.2
    container_name: elasticsearch
    restart: always
    environment:
      - discovery.type=single-node  # Configuração de nó único
      - xpack.security.enabled=false  # Desativa autenticação
    ports:
      - "9200:9200"
    networks:
      - backend

  timescaledb:  # TimescaleDB (extensão do PostgreSQL para séries temporais)
    image: timescale/timescaledb:latest-pg15
    container_name: timescaledb
    restart: always
    ports:
      - "5433:5432"  # Mapeia local 5433 → interno 5432
    environment:
      POSTGRES_PASSWORD: example
    networks:
      - backend

  # ======================
  # Exporters para Prometheus
  # ======================

  postgres_exporter:
    image: prometheuscommunity/postgres-exporter
    environment:
      DATA_SOURCE_NAME: "postgresql://postgres:example@postgres:5432/postgres?sslmode=disable"
    ports:
      - "9187:9187"
    depends_on:
      - postgres  # Espera o PostgreSQL estar pronto
    networks:
      - backend

  mysql_exporter:
    image: prometheus/mysqld-exporter
    environment:
      DATA_SOURCE_NAME: "root:example@(mysql:3306)/"
    ports:
      - "9104:9104"
    depends_on:
      - mysql
    networks:
      - backend

  redis_exporter:
    image: oliver006/redis_exporter
    ports:
      - "9121:9121"
    depends_on:
      - redis
    networks:
      - backend

  mongodb_exporter:
    image: bitnami/mongodb-exporter:latest
    environment:
      MONGODB_URI: "mongodb://mongodb:27017"
    ports:
      - "9216:9216"
    depends_on:
      - mongodb
    networks:
      - backend

  cassandra_exporter:
    image: criteord/cassandra_exporter
    ports:
      - "8080:8080"
    depends_on:
      - cassandra
    networks:
      - backend

  elasticsearch_exporter:
    image: quay.io/prometheuscommunity/elasticsearch-exporter
    ports:
      - "9114:9114"
    environment:
      - ES_URI=http://elasticsearch:9200
    depends_on:
      - elasticsearch
    networks:
      - backend

  # ======================
  # Monitoramento
  # ======================

  prometheus:
    image: prom/prometheus
    container_name: prometheus
    restart: always
    ports:
      - "9090:9090"
    volumes:
      - ./prometheus/prometheus.yml:/etc/prometheus/prometheus.yml  # Configuração externa
    networks:
      - backend

  grafana:
    image: grafana/grafana
    container_name: grafana
    restart: always
    ports:
      - "3000:3000"  # Interface web do Grafana
    volumes:
      - ./grafana/provisioning:/etc/grafana/provisioning  # Dashboards e datasources pré-definidos
    networks:
      - backend

  # ======================
  # Balanceadores de carga
  # ======================

  nginx:  # Nginx simples como proxy reverso
    image: nginx
    container_name: nginx
    restart: always
    ports:
      - "8080:80"
    volumes:
      - ./nginx/nginx.conf:/etc/nginx/nginx.conf:ro
    networks:
      - backend

  haproxy:  # HAProxy como balanceador de carga avançado
    image: haproxy:2.9
    container_name: haproxy
    restart: always
    ports:
      - "8888:80"
    volumes:
      - ./haproxy/haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg:ro
    networks:
      - backend

# ======================
# Rede interna compartilhada
# ======================
# ======================
# PostgreSQL com replicação
# ======================
  pg-primary:
    image: postgres:16
    container_name: pg_primary_us
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: root
      POSTGRES_DB: app_db
    volumes:
      - pg_primary_data:/var/lib/postgresql/data
      - ./primary/postgresql.conf:/etc/postgresql/postgresql.conf
    ports:
      - "5432:5432"
    command: postgres -c config_file=/etc/postgresql/postgresql.conf
    networks:
      - global_pg_net

  pg-replica:
    image: postgres:16
    container_name: pg_replica_br
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: root
    volumes:
      - pg_replica_data:/var/lib/postgresql/data
    depends_on:
      - pg-primary
    ports:
      - "5433:5432"
    command: >
      bash -c 'rm -rf /var/lib/postgresql/data/* && \
      pg_basebackup -h pg-primary -D /var/lib/postgresql/data -U postgres -Fp -Xs -P -R && \
      postgres'
    networks:
      - global_pg_net

volumes:
  pg_primary_data:
  pg_replica_data:

networks:
  global_pg_net:
    driver: bridge