博客

[root@localhost bin]# ./elasticsearch
2018-12-11T22:58:32,045][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [unknown] uncaught exception in thread [main]
org.elasticsearch.bootstrap.StartupException: java.lang.RuntimeException: can not run elasticsearch as root
	at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:140) ~[elasticsearch-6.5.2.jar:6.5.2]
	at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:127) ~[elasticsearch-6.5.2.jar:6.5.2]
	at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-6.5.2.jar:6.5.2]
	at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-6.5.2.jar:6.5.2]
	at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-6.5.2.jar:6.5.2]
	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:93) ~[elasticsearch-6.5.2.jar:6.5.2]
	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:86) ~[elasticsearch-6.5.2.jar:6.5.2]
Caused by: java.lang.RuntimeException: can not run elasticsearch as root
	at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:103) ~[elasticsearch-6.5.2.jar:6.5.2]
	at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:170) ~[elasticsearch-6.5.2.jar:6.5.2]
	at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:333) ~[elasticsearch-6.5.2.jar:6.5.2]
	at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:136) ~[elasticsearch-6.5.2.jar:6.5.2]
	... 6 more

创建用户和组

[root@localhost bin]# groupadd eszu
[root@localhost bin]# useradd esyonghu -g eszu -p 123456

进入elasticsearch-6.5.2目录的上一级

将elasticsearch-6.5.2目录下的所有权限赋予刚创建的用户

root@localhost elasticsearch-6.5.2]# cd ..
[root@localhost tools]# ll
total 291860
drwxr-xr-x. 8 root root       143 Nov 30 08:02 elasticsearch-6.5.2
-rw-r--r--. 1 root root 113320120 Dec 11 22:53 elasticsearch-6.5.2.tar.gz
-rwxrwxrwx. 1 root root 185540433 Dec 11 22:39 jdk-linux-x64.tar.gz
[root@localhost tools]# chown -R esyonghu:eszu elasticsearch-6.5.2

切换用户

[root@localhost tools]# su esyonghu

修改ip ，修改配置文件

[esyonghu@localhost elasticsearch-6.5.2]$ cd config/
[esyonghu@localhost config]$ ll
total 36
-rw-rw----. 1 esyonghu eszu   207 Dec 11 22:58 elasticsearch.keystore
-rw-rw----. 1 esyonghu eszu  2853 Nov 30 07:55 elasticsearch.yml
-rw-rw----. 1 esyonghu eszu  3194 Nov 30 07:55 jvm.options
-rw-rw----. 1 esyonghu eszu 12423 Nov 30 08:02 log4j2.properties
-rw-rw----. 1 esyonghu eszu   473 Nov 30 08:02 role_mapping.yml
-rw-rw----. 1 esyonghu eszu   197 Nov 30 08:02 roles.yml
-rw-rw----. 1 esyonghu eszu     0 Nov 30 08:02 users
-rw-rw----. 1 esyonghu eszu     0 Nov 30 08:02 users_roles
[esyonghu@localhost config]$ vi elasticsearch.yml 

将下面内容的注释部分打开

network.host: 192.168.119.140
#
# Set a custom port for HTTP:
#
http.port: 9200

保存后，重新启动

[esyonghu@localhost bin]$ ./elasticsearch

主要出现下面三个错误

ERROR: [3] bootstrap checks failed
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
[2]: max number of threads [3780] for user [esyonghu] is too low, increase to at least [4096]
[3]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
[2018-12-12T21:54:57,353][INFO ][o.e.n.Node               ] [PlbSkhz] stopping ...
[2018-12-12T21:54:57,413][INFO ][o.e.n.Node               ] [PlbSkhz] stopped
[2018-12-12T21:54:57,413][INFO ][o.e.n.Node               ] [PlbSkhz] closing ...
[2018-12-12T21:54:57,473][INFO ][o.e.n.Node               ] [PlbSkhz] closed
[2018-12-12T21:54:57,488][INFO ][o.e.x.m.j.p.NativeController] [PlbSkhz] Native controller process has stopped - no new native processes can be started

解决方法

[root@localhost ~]# vi /etc/security/limits.conf

在文件的末尾加上

esyonghu soft nofile 65536
esyonghu hard nofile 65536
esyonghu soft nproc 4096
esyonghu hard nproc 4096

进入到下面文件夹

[root@localhost ~]# cd /etc/security/limits.d
[root@localhost limits.d]# ll
total 4
-rw-r--r--. 1 root root 191 Nov  6  2016 20-nproc.conf

[root@localhost limits.d]# vi 20-nproc.conf 

# Default limit for number of user's processes to prevent
# accidental fork bombs.
# See rhbz #432903 for reasoning.

*          soft    nproc     4096
root       soft    nproc     unlimited
~                                                                                                                            
~  

将上面内容的*号改成用户名

# See rhbz #432903 for reasoning.

esyonghu   soft    nproc     4096
root       soft    nproc     unlimited

修改下面文件加上内容

[root@localhost security]# vi /etc/sysctl.conf 
vm.max_map_count = 655360

对于上面的内容让其生效

[root@localhost security]# sysctl -p
vm.max_map_count = 655360

重新启动ES,发现仍然有两个问题。

ERROR: [2] bootstrap checks failed
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
[2]: max number of threads [3780] for user [esyonghu] is too low, increase to at least [4096]
[2018-12-12T22:10:33,868][WARN ][o.e.m.j.JvmGcMonitorService] [PlbSkhz] [gc][young][2][28] duration [1.9s], collections [1]/[2.7s], total [1.9s]/[10.4s], memory [121.1mb]->[65.1mb]/[1015.6mb], all_pools {[young] [59mb]->[292.5kb]/[66.5mb]}{[survivor] [7.3mb]->[7.8mb]/[8.3mb]}{[old] [54.7mb]->[57mb]/[940.8mb]}
[2018-12-12T22:10:33,869][WARN ][o.e.m.j.JvmGcMonitorService] [PlbSkhz] [gc][2] overhead, spent [1.9s] collecting in the last [2.7s]
[2018-12-12T22:10:33,993][INFO ][o.e.n.Node               ] [PlbSkhz] stopping ...
[2018-12-12T22:10:34,092][INFO ][o.e.n.Node               ] [PlbSkhz] stopped
[2018-12-12T22:10:34,092][INFO ][o.e.n.Node               ] [PlbSkhz] closing ...
[2018-12-12T22:10:34,156][INFO ][o.e.n.Node               ] [PlbSkhz] closed
[2018-12-12T22:10:34,197][INFO ][o.e.x.m.j.p.NativeController] [PlbSkhz] Native controller process has stopped - no new native processes can be started

重启虚拟机reboot

关闭防火墙

[root@localhost ~]# systemctl stop firewalld.service

对于9100端口，防火墙放行

firewall-cmd --zone=public --add-port=9100/tcp --permanent

重启防火墙

firewall-cmd --reload

启动es ，使用su esyonghu，进入es下的bin目录下./elasticsearch

启动es-head，进入到es-head目录下 ，执行

node_modules/grunt/bin/grunt server