Elasticsearch【问题记录 02】can not run elasticsearch as root + vm.max_map_count [65530] is too low 问题解决

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

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

[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

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

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

# 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

[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