elasticsearch-installation

1. 安装Java JDK

移步 ：sdfa

2. 下载elasticsearch

• url : https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.1.2.zip

3. 解压安装installation

• 3.1 由于elasticsearch不支持root用户启动（can not run elasticsearch as root），这里我们新建一个组和用户：

  groupadd ela
  useradd ela -g groupadd

• 3.3 切换到root用户,把elasticsearch的所属组合用户给为ela

  su root
  chown ela:ela -R /usr/local/elasticsearch-5.1.2

• 3.4 修改elasticsearch.yml 配置文件

  vim /usr/local/elasticsearch-5.1.2/config/elasticsearch.yml
  

4.访问

• 4.1 浏览器访问：
  

• 4.2 终端访问：
  

5.可能会出现的问题

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

  修改/etc/security/limits.conf文件，添加或修改如下行：
  * hard nofile 65536
  * soft nofile 65536

• 5.2 max virtual memory areas vm.max_map_count [65530] likely too low, increase to at least [262144]

  sudo sysctl -w vm.max_map_count=262144
  修改 /etc/sysctl.conf 文件，添加 “vm.max_map_count”设置