安装单机版Elasticsearch

1、需要提前安装好jdk环境

2、使用wget下载安装包本文版本使用6.3.2 wget http://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.3.2.tar.gz

3、解压 tar -zxvf elasticsearch-6.3.2.tar.gz

4、运行elasticsearch {替换成自己的目录}/elasticsearch-6.3.2/bin/elasticsearch

5、异常处理

   ①：java.lang.RuntimeException: can not run elasticsearch as root

         解决方式:创建一个用户es useradd es -p 123456 

                       授权 chown -R {替换成自己的目录}/elasticsearch-6.3.2

         验证:切换到es用户  su - es 再次运行{替换成自己的目录}/elasticsearch-6.3.2/bin/elasticsearch

    max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]

      修改/etc/security/limits.conf文件，增加配置，用户es退出后重新登录生效  

      * soft nofile 65536

 * hard nofile 65536
 *表示哪些用户
 


    max number of threads [3818] for user [es] is too low, increase to at least [4096]
      修改配置文件/etc/security/limit    

 *               soft    nproc           4096
        *               hard    nproc           4096
 


 max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
         修改/etc/sysctl.conf文件，增加配置
 vm.max_map_count=262144
      执行命令sysctl -p生效