Linux环境 安装 elasticsearch can not run elasticsearch as root + vm.max_map_count [65530] is too low 问题(

Posted 2021-08-29 シ風箏

异常一

Caused by: java.lang.RuntimeException: can not run elasticsearch as root

异常一解决

添加 elasticsearch 用户组和用户：

[root@tcloud ~]# groupadd elasticsearch 
[root@tcloud ~]# useradd -g elasticsearch elasticsearch
# 设置密码
[root@tcloud ~]# echo "elasticsearch" | passwd elasticsearch --stdin

将ES的文件转到 elasticsearch 下：

[root@tcloud ~]# cd /usr/local/elasticsearch 
[root@tcloud ~]# chown -R elasticsearch .
[root@tcloud ~]# chgrp -R elasticsearch .
[root@tcloud elasticsearch]# ll
total 448
drwxr-xr-x  3 elasticsearch elasticsearch   4096 Jul 31 11:22 bin
drwxr-xr-x  2 elasticsearch elasticsearch   4096 Jul 31 12:16 config
drwxr-xr-x  3 elasticsearch elasticsearch   4096 Oct 31  2018 lib
-rw-r--r--  1 elasticsearch elasticsearch  13675 Oct 31  2018 LICENSE.txt
drwxr-xr-x  2 elasticsearch elasticsearch   4096 Jul 31 12:01 logs
drwxr-xr-x 27 elasticsearch elasticsearch   4096 Oct 31  2018 modules
-rw-r--r--  1 elasticsearch elasticsearch 401465 Oct 31  2018 NOTICE.txt
drwxr-xr-x  2 elasticsearch elasticsearch   4096 Oct 31  2018 plugins
-rw-r--r--  1 elasticsearch elasticsearch   8519 Oct 31  2018 README.textile

修改 sudoers 文件，给用户 elasticsearch 添加 sudo 权限：

[root@tcloud ~]# vim /etc/sudoers
## Allow root to run any commands anywhere
root    ALL=(ALL)       ALL
# 添加elasticsearch 
elasticsearch ALL=(ALL)       ALL

启动时切换到 elasticsearch 用户下。

异常二

ERROR: [1] bootstrap checks failed
[1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

异常二解决

# 查看系统环境变量vm.max_map_count
[root@tcloud ~]# sysctl -a | grep vm.max_map_count
vm.max_map_count = 65530

# 修改系统环境变量vm.max_map_count
[root@tcloud ~]# vim /etc/sysctl.conf
	# 末尾添加 
	vm.max_map_count = 262144

# 配置文件修改完后需要重启才能生效 可使用下面命令使得本次启动有效
[root@tcloud ~]# sysctl -w vm.max_map_count=262144
vm.max_map_count = 262144

修改最大文件描述符数量和用户最大线程数

[root@tcloud ~]# vim /etc/security/limits.conf
	# 添加下面代码至文件末尾：
	* soft nofile 65536
	* hard nofile 65536
	* soft nproc 4096
	* hard nproc 4096