CentOS7添加logstash5启动脚本

默认情况使用rpm包安装完logstash之后没有启动脚本，这一点我觉得算是开发不够彻底。官网给了一个脚本，需要根据不同的系统版本生成对应的启动脚本，而且官网没有给明使用方法，对于新用户来说算是个坑，不过在终端可以查看到脚本的使用帮助。

我的系统是CentOS7，这里说一下7的使用方法，6类似，具体方法如下：

[root@elk-node1 ~]# cd /usr/share/logstash/bin/
[root@elk-node1 bin]# ./system-install --help
Usage: system-install [OPTIONSFILE] [STARTUPTYPE] [VERSION]

NOTE: These arguments are ordered, and co-dependent

OPTIONSFILE: Full path to a startup.options file
OPTIONSFILE is required if STARTUPTYPE is specified, but otherwise looks first
in /usr/share/logstash/config/startup.options and then /etc/logstash/startup.options
Last match wins

STARTUPTYPE: e.g. sysv, upstart, systemd, etc.
OPTIONSFILE is required to specify a STARTUPTYPE.

VERSION: The specified version of STARTUPTYPE to use.  The default is usually
preferred here, so it can safely be omitted.
Both OPTIONSFILE & STARTUPTYPE are required to specify a VERSION.

For more information, see https://github.com/jordansissel/pleaserun

a、要跟startup.options文件的绝对路径，如果是rpm安装的在/etc/logstash/startup.options，如果是二进制包解压安装的则在解压目录下的config目录下面。
b、必须要跟启动类型，比如CentOS7是systemd，CentOS7是sysv。

2、执行脚本生成启动文件

[root@elk-node1 bin]# /usr/share/logstash/bin/system-install /etc/logstash/startup.options systemd
Using provided startup.options file: /etc/logstash/startup.options
Manually creating startup for specified platform: systemd
Successfully created system startup script for Logstash

3、执行完就可以使用systemctl启动logstash了　　

[root@elk-node1 bin]# systemctl enable logstash.service 
Created symlink from /etc/systemd/system/multi-user.target.wants/logstash.service to /etc/systemd/system/logstash.service.
[root@elk-node1 bin]# systemctl start logstash.service
[root@elk-node1 bin]# systemctl status logstash.service 
● logstash.service - logstash
   Loaded: loaded (/etc/systemd/system/logstash.service; enabled; vendor preset: disabled)
   Active: active (running) since Tue 2017-12-19 14:27:21 CST; 9s ago
 Main PID: 10125 (java)
   CGroup: /system.slice/logstash.service
           └─10125 /usr/bin/java -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMS...

Dec 19 14:27:21 elk-node1.example.com systemd[1]: Started logstash.
Dec 19 14:27:21 elk-node1.example.com systemd[1]: Starting logstash...