//sysctl.conf 增加
vm.max_map_count = 655360
sysctl -p #生效

// 每台机器增加目录配置文件

mkdir -p /home/es/config
mkdir -p /home/es/data
mkdir -p /home/es/plugins/ik
mkdir -p /home/es/logs

chmod 777 /home/es* -R

// 下载镜像

docker pull elasticsearch:7.6.2
docker pull kibana:7.6.2

// 下载分词器

mkdir -p /home/es/plugins/ik
wget https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v7.6.2/elasticsearch-analysis-ik-7.6.2.zip
// 解压
unzip elasticsearch-analysis-ik-7.6.2.zip
rm -rf elasticsearch-analysis-ik-7.6.2.zip

每台机器增加配置文件

vi /home/es/config/elasticsearch.yml
network.host: 0.0.0.0
http.cors.enabled: true # 设置跨域，主要用于head插件访问es
http.cors.allow-origin: "*" # 允许所有域名访问

增加一个节点就行

[root@es01 kibana]# cat /home/es/kibana/kibana.yml

server.port: 5601
server.host: "0.0.0.0"
server.name: "kibana-192.168.10.70"
elasticsearch.hosts: ["http://192.168.10.70:9200","http://192.168.10.71:9200","http://192.168.10.72:9200"]

[root@es01 es01]# cat docker-compose.yml

version: '3.3'
services:
  es01:
    image: elasticsearch:7.6.2
    container_name: es01
    restart: always
    environment:
      - node.name=es01
      - network.publish_host=192.168.10.70
      - discovery.seed_hosts=192.168.10.71,192.168.10.72
      - cluster.initial_master_nodes=192.168.10.70,192.168.10.71,192.168.10.72
      - cluster.name=es-docker-cluster
      - bootstrap.memory_lock=true
      - "ES_JAVA_OPTS=-Xms8196m -Xmx8196m"
    ulimits:
      memlock:
        soft: -1
        hard: -1
    volumes:
      - /home/es/config/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml
      - /home/es/data:/usr/share/elasticsearch/data
      - /home/es/plugins:/usr/share/elasticsearch/plugins
      - /home/es/logs:/usr/share/elasticsearch/logs
    ports:
      - 9200:9200
      - 9300:9300
  kib01:
    depends_on:
      - es01
    image: kibana:7.6.2
    container_name: kib01
    ports:
      - 5601:5601
    environment:
      ELASTICSEARCH_URL: http://es01:9200
      ELASTICSEARCH_HOSTS: http://es01:9200
    volumes:
      - /home/es/kibana/kibana.yml:/usr/share/kibana/config/kibana.yml

[root@es02 es02]# cat docker-compose.yml

version: '3.3'
services:
  es02:
    image: elasticsearch:7.6.2
    container_name: es02
    restart: always
    environment:
      - node.name=es02
      - network.publish_host=192.168.10.71
      - discovery.seed_hosts=192.168.10.70,192.168.10.72
      - cluster.initial_master_nodes=192.168.10.70,192.168.10.71,192.168.10.72
      - cluster.name=es-docker-cluster
      - bootstrap.memory_lock=true
      - "ES_JAVA_OPTS=-Xms8196m -Xmx8196m"
    ulimits:
      memlock:
        soft: -1
        hard: -1
    volumes:
      - /home/es/config/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml
      - /home/es/data:/usr/share/elasticsearch/data
      - /home/es/plugins:/usr/share/elasticsearch/plugins
      - /home/es/logs:/usr/share/elasticsearch/logs
    ports:
      - 9200:9200
      - 9300:9300

[root@es03 es03]# cat docker-compose.yml
version: '3'
services:
  es03:
    image: elasticsearch:7.6.2
    container_name: es03
    restart: always
    environment:
      - node.name=es03
      - network.publish_host=192.168.10.72
      - discovery.seed_hosts=192.168.10.70,192.168.10.71
      - cluster.initial_master_nodes=192.168.10.70,192.168.10.71,192.168.10.72
      - cluster.name=es-docker-cluster
      - bootstrap.memory_lock=true
      - "ES_JAVA_OPTS=-Xms8196m -Xmx8196m"
    ulimits:
      memlock:
        soft: -1
        hard: -1
    volumes:
      - /home/es/config/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml
      - /home/es/data:/usr/share/elasticsearch/data
      - /home/es/plugins:/usr/share/elasticsearch/plugins
      - /home/es/logs:/usr/share/elasticsearch/logs
    ports:
      - 9200:9200
      - 9300:9300

集群验证：
http://192.168.10.70:9200/_cat/nodes?pretty

查看分片：
curl 192.168.10.71:9200/_cat/shards