elasticsearch 安装过程中可遇到的问题 2019-04-05

1、can not run elasticsearch as root

解决方法：切换到非root用户

步骤：groupadd elsearch

useradd elsearch -g elsearch -p elsearch

su elsearch

2、main ERROR Could not register mbeans java.security.AccessControlException: access denied ("javax.management.MBeanTrustPermission" "register")

解决方法：改变elasticsearch文件夹所有者到当前用户

步骤：sudo chown -R 用户组:用户名 elasticsearch目录

chmod -R 775 elasticsearch目录

如果还是有错误的话，添加permission javax.management.MBeanTrustPermission "register"

nano /usr/java/jdk1.8.0_121/jre/lib/security/java.policy

3、max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

解决方法：

sudo vi /etc/sysctl.conf 

添加下面配置：

vm.max_map_count=655360

并执行命令：

sudo sysctl -p

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

解决方法：

sudo vi /etc/security/limits.conf

添加如下内容:

* soft nofile 65536

* hard nofile 131072

* soft nproc 2048

* hard nproc 4096

sudo vi /etc/pam.d/common-session

添加 session required pam_limits.so

sudo vi /etc/pam.d/common-session-noninteractive

添加 session required pam_limits.so