CentOS7.9-ES7 部署

1. 下载 https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.11.2-linux-x86_64.tar.gz

2. 解压

   tar -zxvf elasticsearch-7.11.2-linux-x86_64.tar.gz
   

3. 移动目录

   mv elasticsearch-7.11.2 /usr/local/
   

4. 修改es相关配置文件(重点配置)

   # vim config/elasticsearch.yml
   # 集群名
   cluster.name: es-cluster
   # 节点名
   node.name: node-master
   # 数据存放位置
   path.data: /usr/local/elasticsearch-7.11.2/data
   # 日志存放位置
   path.logs: /usr/local/elasticsearch-7.11.2/logs
   # bind 地址,0 表示任意
   network.host: 0.0.0.0
   # 默认初始 master 节点
   cluster.initial_master_nodes: ["node-master"]
   

5. 修改 jvm 相关配置

   # 重点配置堆内存大小, 本人为虚拟机只给 512m,请结合实际情况调优
   -Xms512m
   -Xmx512m
   

6. 因为 es 不允许使用 root, 所以添加 es 用户

   useradd esuser
   chown -R esuser:esuser /usr/local/elasticsearch-7.11.2/
   

7. 运行时可能出现以下错误

   ERROR: [2] bootstrap checks failed
   [1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65535]
   [2]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
   ERROR: Elasticsearch did not exit normally - check the logs at /usr/local/elasticsearch-7.11.2/logs/es-cluster.log
   

8. 修改限制

   vim /etc/security/limits.conf
   # 输入如下参数
   * soft nofile 65536
   * hard nofile 131072
   * soft nproc 2048
   * hard nproc 4096
   

9. 修改系统设置

   vim /etc/sysctl.conf
   vm.max_map_count=262145
   

   sysctl -p
   

10. 配置开机自启

    vim /etc/init.d/elasticsearch
    

    #!/bin/bash
    #chkconfig: 345 63 37
    #description: elasticsearch
    #processname: elasticsearch-7.11.2
    
    export ES_HOME=/usr/local/elasticsearch-7.11.2
    
    case $1 in
            start)
                    su esuser<<!
                    cd $ES_HOME
                    ./bin/elasticsearch -d -p pid
                    exit
    !
                    echo "elasticsearch is started"
                    ;;
            stop)
                    pid=`cat $ES_HOME/pid`
                    kill -9 $pid
                    echo "elasticsearch is stopped"
                    ;;
            restart)
                    pid=`cat $ES_HOME/pid`
                    kill -9 $pid
                    echo "elasticsearch is stopped"
                    sleep 1
                    su esuser<<!
                    cd $ES_HOME
                    ./bin/elasticsearch -d -p pid
                    exit
    !
                    echo "elasticsearch is started"
            ;;
        *)
            echo "start|stop|restart"
            ;;
    esac
    exit 0
    

    chmod 777 elasticsearch
    chkconfig --add elasticsearch
    chkconfig elasticsearch on