docker-compose.yml

version: "3"
services:
  _setup:
    image: docker.elastic.co/elasticsearch/elasticsearch:${STACK_VERSION}
    volumes:
      - certs:/usr/share/elasticsearch/config/certs
    user: "0"
    command: >
      bash -c '
        if [ x${ELASTIC_PASSWORD} == x ]; then
          echo "Set the ELASTIC_PASSWORD environment variable in the .env file";
          exit 1;
        elif [ x${KIBANA_PASSWORD} == x ]; then
          echo "Set the KIBANA_PASSWORD environment variable in the .env file";
          exit 1;
        fi;
        if [ ! -f config/certs/ca.zip ]; then
          echo "Creating CA";
          bin/elasticsearch-certutil ca --silent --pem -out config/certs/ca.zip;
          unzip config/certs/ca.zip -d config/certs;
        fi;
        if [ ! -f config/certs/certs.zip ]; then
          echo "Creating certs";
          echo -ne \
          "instances:\n"\
          "  - name: elasticsearch\n"\
          "    dns:\n"\
          "      - elasticsearch\n"\
          "      - localhost\n"\
          "    ip:\n"\
          "      - 127.0.0.1\n"\
          > config/certs/instances.yml;
          bin/elasticsearch-certutil cert --silent --pem -out config/certs/certs.zip --in config/certs/instances.yml --ca-cert config/certs/ca/ca.crt --ca-key config/certs/ca/ca.key;
          unzip config/certs/certs.zip -d config/certs;
        fi;
        echo "Setting file permissions"
        chown -R root:root config/certs;
        find . -type d -exec chmod 750 \{\} \;;
        find . -type f -exec chmod 640 \{\} \;;
        echo "Waiting for Elasticsearch availability";
        until curl -s --cacert config/certs/ca/ca.crt https://elasticsearch:9200 | grep -q "missing authentication credentials"; do sleep 30; done;
        echo "Setting kibana_system password";
        until curl -s -X POST --cacert config/certs/ca/ca.crt -u "elastic:${ELASTIC_PASSWORD}" -H "Content-Type: application/json" https://elasticsearch:9200/_security/user/kibana_system/_password -d "{\"password\":\"${KIBANA_PASSWORD}\"}" | grep -q "^{}"; do sleep 10; done;
        echo "All done!";
      '
    networks:
      - logging-network
    healthcheck:
      test: ["CMD-SHELL", "[ -f config/certs/elasticsearch/elasticsearch.crt ]"]
      interval: 1s
      timeout: 5s
      retries: 120

  fluentd:
    build: ./fluentd
    volumes:
      - ./fluentd/conf:/fluentd/etc
      # - ./data/certs/ca/ca.crt:/fluentd/etc/certs/ca.crt:ro # if SSL cert verification is needed
    env_file:
      - .env
    ports:
      - "24224:24224"
      - "24224:24224/udp"
    networks:
      - logging-network
    depends_on:
      elasticsearch:
        condition: service_healthy

  elasticsearch:
    depends_on:
      _setup:
        condition: service_healthy
    image: docker.elastic.co/elasticsearch/elasticsearch:${STACK_VERSION}
    environment:
      - "discovery.type=single-node"
      - "ES_JAVA_OPTS=-Xms2g -Xmx2g" # Adjust heap size, anything below 2g is likely to cause issues
      - node.name=elasticsearch
      - cluster.name=${CLUSTER_NAME}
      - ELASTIC_PASSWORD=${ELASTIC_PASSWORD}
      - bootstrap.memory_lock=true
      - xpack.security.enabled=true
      - xpack.security.http.ssl.enabled=true
      - xpack.security.http.ssl.key=certs/elasticsearch/elasticsearch.key
      - xpack.security.http.ssl.certificate=certs/elasticsearch/elasticsearch.crt
      - xpack.security.http.ssl.certificate_authorities=certs/ca/ca.crt
      - xpack.security.transport.ssl.enabled=true
      - xpack.security.transport.ssl.key=certs/elasticsearch/elasticsearch.key
      - xpack.security.transport.ssl.certificate=certs/elasticsearch/elasticsearch.crt
      - xpack.security.transport.ssl.certificate_authorities=certs/ca/ca.crt
      - xpack.security.transport.ssl.verification_mode=certificate
      - xpack.license.self_generated.type=${LICENSE}
    volumes:
      - certs:/usr/share/elasticsearch/config/certs
      - es_data:/usr/share/elasticsearch/data
    networks:
      - logging-network
    ports:
      - ${ES_PORT}:9200
    # deploy: # new syntax for mem_limit
    #   resources:
    #     limits:
    #       memory: 512M
    mem_limit: ${ELASTICSEARCH_MEM_LIMIT}
    ulimits:
      memlock:
        soft: -1
        hard: -1
    healthcheck:
      test: ["CMD-SHELL", "curl -s --cacert config/certs/ca/ca.crt https://localhost:9200 | grep -q 'missing authentication credentials'"]
      interval: 10s
      timeout: 10s
      retries: 120

  kibana:
    depends_on:
      elasticsearch:
        condition: service_healthy
    image: docker.elastic.co/kibana/kibana:${STACK_VERSION}
    volumes:
      - certs:/usr/share/kibana/config/certs
      - kibana_data:/usr/share/kibana/data
    environment:
      - SERVERNAME=kibana
      - ELASTICSEARCH_HOSTS=https://elasticsearch:9200
      - ELASTICSEARCH_USERNAME=kibana_system
      - ELASTICSEARCH_PASSWORD=${KIBANA_PASSWORD}
      # - ELASTICSEARCH_SSL_VERIFICATIONMODE=none
      - ELASTICSEARCH_SSL_CERTIFICATEAUTHORITIES=config/certs/ca/ca.crt
    networks:
      - logging-network
    ports:
      - ${KIBANA_PORT}:5601
    mem_limit: ${KIBANA_MEM_LIMIT}
    healthcheck:
      test: ["CMD-SHELL", "curl -s -I http://localhost:5601 | grep -q 'HTTP/1.1 302 Found'"]
      interval: 10s
      timeout: 10s
      retries: 120

networks:
  logging-network:
    external: true
    name: logging-network


volumes:
  certs:
    driver: local
  es_data:
    driver: local
  kibana_data:
    driver: local