x-default: &default
  restart: unless-stopped
  logging:
    driver: json-file
    options:
      max-size: 100m
      max-file: "3"

services:
  elasticsearch:
    <<: *default
    image: docker.elastic.co/elasticsearch/elasticsearch:${ELASTICSEARCH_VERSION:-8.16.1}
    ports:
      - "${ELASTICSEARCH_HTTP_PORT_OVERRIDE:-9200}:9200"
      - "${ELASTICSEARCH_TRANSPORT_PORT_OVERRIDE:-9300}:9300"
    volumes:
      - elasticsearch_data:/usr/share/elasticsearch/data
      - elasticsearch_logs:/usr/share/elasticsearch/logs

      # Custom configuration
      # - ./elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml:ro
    environment:
      - TZ=${TZ:-UTC}
      - node.name=elasticsearch
      - cluster.name=${ELASTICSEARCH_CLUSTER_NAME:-docker-cluster}
      - discovery.type=${ELASTICSEARCH_DISCOVERY_TYPE:-single-node}
      - bootstrap.memory_lock=true
      - xpack.security.enabled=${ELASTICSEARCH_SECURITY_ENABLED:-false}
      - xpack.security.http.ssl.enabled=${ELASTICSEARCH_SSL_ENABLED:-false}
      - xpack.security.transport.ssl.enabled=${ELASTICSEARCH_SSL_ENABLED:-false}
      - "ES_JAVA_OPTS=-Xms${ELASTICSEARCH_HEAP_SIZE:-1g} -Xmx${ELASTICSEARCH_HEAP_SIZE:-1g}"
    ulimits:
      memlock:
        soft: -1
        hard: -1
    deploy:
      resources:
        limits:
          cpus: '2.00'
          memory: 2G
        reservations:
          cpus: '0.50'
          memory: 1G
    healthcheck:
      test: ["CMD-SHELL", "curl -f http://localhost:9200/_cluster/health || exit 1"]
      interval: 30s
      timeout: 10s
      retries: 5
      start_period: 60s

volumes:
  elasticsearch_data:
  elasticsearch_logs: