基于 Docker 部署 ElasticSearch 集群

前提

安装好 docker 和 docker-compose 的环境，具体安装教程查看链接

下载镜像

docker pull elasticsearch:5.6.11

创建所需的文件和目录

mkdir -p /root/softdata/elasticsearch/config 
cd /root/softdata/elasticsearch/config
touch es-node1.yml # 节点 1 配置文件
touch es-node2.yml # 节点 2 配置文件
touch es-node3.yml # 节点 3 配置文件
cd ..
touch docker-compose-yaml # docker-compose 启动文件

编写节点配置文件

es-node1.yml 配置文件

cluster.name: es-cluster
node.name: es-node1
path.data: /usr/share/elasticsearch/data
path.logs: /usr/share/elasticsearch/logs
bootstrap.memory_lock: false
bootstrap.system_call_filter: false
network.host: 0.0.0.0
http.port: 9200
discovery.zen.ping.unicast.hosts: ["es-node2","es-node3"] 
http.cors.enabled: true
http.cors.allow-origin: "*"

es-node2.yml 配置文件

cluster.name: es-cluster
node.name: es-node2
path.data: /usr/share/elasticsearch/data
path.logs: /usr/share/elasticsearch/logs
bootstrap.memory_lock: false
bootstrap.system_call_filter: false
network.host: 0.0.0.0
http.port: 9200
discovery.zen.ping.unicast.hosts: ["es-node1","es-node3"] 
http.cors.enabled: true
http.cors.allow-origin: "*"

es-node3.yml 配置文件

cluster.name: es-cluster
node.name: es-node3
path.data: /usr/share/elasticsearch/data
path.logs: /usr/share/elasticsearch/logs
bootstrap.memory_lock: false
bootstrap.system_call_filter: false
network.host: 0.0.0.0
http.port: 9200
discovery.zen.ping.unicast.hosts: ["es-node1","es-node2"] 
http.cors.enabled: true
http.cors.allow-origin: "*"

docker-compose 配置文件

version: '3'
services:
  es-node1:
    image: elasticsearch:5.6.11
    container_name: es-node1
    restart: always
    environment:
      - "ES_JAVA_OPTS=-Xms256m -Xmx256m"
    ulimits:
      memlock:
        soft: -1
        hard: -1
    volumes:
      - /root/softdata/elasticsearch/data/es-node1:/usr/share/elasticsearch/data
      - /root/softdata/elasticsearch/logs/es-node1:/usr/share/elasticsearch/logs
      - /root/softdata/elasticsearch/plugins/es-node1:/usr/share/elasticsearch/plugins 
      - /root/softdata/elasticsearch/config/es-node1.yml:/usr/share/elasticsearch/config/elasticsearch.yml
    ports:
      - 9200:9200
  es-node2:
    image: elasticsearch:5.6.11
    container_name: es-node2
    restart: always
    environment:
      - "ES_JAVA_OPTS=-Xms256m -Xmx256m"
    ulimits:
      memlock:
        soft: -1
        hard: -1
    volumes:
      - /root/softdata/elasticsearch/data/es-node2:/usr/share/elasticsearch/data
      - /root/softdata/elasticsearch/logs/es-node2:/usr/share/elasticsearch/logs
      - /root/softdata/elasticsearch/plugins/es-node1:/usr/share/elasticsearch/plugins
      - /root/softdata/elasticsearch/config/es-node2.yml:/usr/share/elasticsearch/config/elasticsearch.yml
    ports:
      - 9201:9200
  es-node3:
    image: elasticsearch:5.6.11
    container_name: es-node3
    restart: always
    environment:
      - "ES_JAVA_OPTS=-Xms256m -Xmx256m"
    ulimits:
      memlock:
        soft: -1
        hard: -1
    volumes:
      - /root/softdata/elasticsearch/data/es-node3:/usr/share/elasticsearch/data
      - /root/softdata/elasticsearch/logs/es-node3:/usr/share/elasticsearch/logs
      - /root/softdata/elasticsearch/plugins/es-node1:/usr/share/elasticsearch/plugins
      - /root/softdata/elasticsearch/config/es-node3.yml:/usr/share/elasticsearch/config/elasticsearch.yml
    ports:
      - 9202:9200

启动容器

docker-compose up -d

安装 analysis-ik 中文分词器

docker exec -it es-node1 bash
cd /usr/share/elasticsearch/plugins
wget https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v5.6.11/elasticsearch-analysis-ik-5.6.11.zip
unzip elasticsearch-analysis-ik-5.6.11.zip
mv elasticsearch/ analysis-ik/

安装完成之后我们需要重启 elasticsearch 集群，重启命令

docker-compose restart

验证集群状态

验证集群节点数，其中master代表该节点为主节点，正常情况下为 3 个节点

curl http://<IP>:9200/_cat/nodes?v

验证集群健康状态，status为green表示正常

curl http://<IP>:9200/_cat/health?v