错误详情

can not run elasticsearch as root

错误原因

root用户启动es7.4.0被拒绝,其他版本类似.
es 因为安全问题拒绝使用root用户启动

解决方案

添加用户组es,及用户es 密码password
给用户es:es添加指定目录拥有权限

groupadd es
useradd es -g es -p password # -g 指定组 -p 指定密码
chown -R es:es  elasticsearch-7.4.0/ # -R : 处理指定目录下的所有文件

切换到用户,并执行elasticsearch

su es
cd  elasticsearch-7.4.0/bin
./elasticsearch 
./elasticsearch -d # 后台方式启动

成功运行

[es@localhost ~]$ lsof -i:9200
COMMAND   PID USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
java    59772   es  208u  IPv6 5185436      0t0  TCP localhost:wap-wsp (LISTEN)
java    59772   es  209u  IPv6 5185437      0t0  TCP localhost:wap-wsp (LISTEN)
[es@localhost ~]$ curl 127.0.0.1:9200
{
  "name" : "localhost.localdomain",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "i0JcrWyeT6WMqw-VV_SzjQ",
  "version" : {
    "number" : "7.4.0",
    "build_flavor" : "default",
    "build_type" : "tar",
    "build_hash" : "22e1767283e61a198cb4db791ea66e3f11ab9910",
    "build_date" : "2019-09-27T08:36:48.569419Z",
    "build_snapshot" : false,
    "lucene_version" : "8.2.0",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}