CentOS7上elasticsearch5.0启动失败

CentOS7上elasticsearch5.0启动失败

刚一启动完直接就退出了

$ ./elasticsearch
...
ERROR: bootstrap checks failed
max file descriptors [] for elasticsearch process likely too low, increase to at least []
max virtual memory areas vm.max_map_count [] likely too low, increase to at least []
[--31T04::,][INFO ][o.e.n.Node               ] [vJDcSkt] stopping ...
[--31T04::,][INFO ][o.e.n.Node               ] [vJDcSkt] stopped
[--31T04::,][INFO ][o.e.n.Node               ] [vJDcSkt] closing ...
[--31T04::,][INFO ][o.e.n.Node               ] [vJDcSkt] closed

解决办法：

问题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

问题2：max virtual memory areas vm.max_map_count [65530] likely too low, increase to at least [262144]

使用下面的方法临时使其生效

sudo sysctl -w vm.max_map_count=

或者修改 /etc/sysctl.conf 文件，添加 “vm.max_map_count”设置

设置后，可以使用

sysctl -a

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

 1 [root@localhost ~]# cat /etc/sysctl.conf | grep -v "vm.max_map_count" > /tmp/system_sysctl.conf
 2 [root@localhost ~]# echo "vm.max_map_count=262144" >> /tmp/system_sysctl.conf
 3 [root@localhost ~]# mv /tmp/system_sysctl.conf /etc/sysctl.conf
 4 mv：是否覆盖"/etc/sysctl.conf"？ y
 5 [root@localhost ~]# cat /etc/sysctl.conf
 6 # System default settings live in /usr/lib/sysctl.d/00-system.conf.
 7 # To override those settings, enter new settings here, or in an /etc/sysctl.d/<name>.conf file
 8 #
 9 # For more information, see sysctl.conf(5) and sysctl.d(5).
10 vm.max_map_count=262144
11 [root@localhost ~]# sysctl -p
12 vm.max_map_count = 262144