####tsar采集apache的插件安装步骤

1.首先编译asar_apache_agent
make

2.将asar_apache_agent部署到服务器
make install,默认会安装到/usr/local/sbin/asar_apache_agent
或者拷贝到指定目录，比如/usr/local/sbin/asar_apache_agent

3.配置apache的CustomLog，注意asar_apache_agent的目录要保持一致
CustomLog "|/usr/local/sbin/asar_apache_agent" "%D"

4.重启apache，配置/etc/tsar/tsar.conf确保开启mod_apache on

-bash-3.2$/etc/init.d/httpd start
Starting httpd:                                            [  OK  ]
-bash-3.2$ ps aux|grep agent
root     12323  0.0  0.0   3652   348 ?        S    14:22   0:00 /usr/local/sbin/asar_apache_agent
kongjian 12367  0.0  0.0  61132   752 pts/14   S+   14:22   0:00 grep agent

5.使用tsar查看apache的数据

asar_apache采集的数据会临时保存在/tmp/apachert.mmap里面，配置成功时，这个文件会存在，否则kill掉asar_apache_agent,重启httpd

tsar --apache -l -i 1
-bash-3.2$ tsar --apache -l -i 1
Time              ------------------apache----------------
Time                 qps      rt    sent    busy    idle
16/07/14-14:25:41   8.1K    0.09  794.00    9.00   30.00
16/07/14-14:25:42   7.8K    0.09  766.00   10.00   30.00
16/07/14-14:25:43   8.7K    0.09  851.00   11.00   29.00
16/07/14-14:25:44   8.1K    0.09  791.00    9.00   31.00

6.另外要确保apache能够访问server-status?auto页面

-bash-3.2$ curl localhost/server-status?auto
Total Accesses: 89588
Total kBytes: 8592
CPULoad: .879688
Uptime: 640
ReqPerSec: 139.981
BytesPerSec: 13747.2
BytesPerReq: 98.2074
BusyWorkers: 1
IdleWorkers: 32
Scoreboard: __._____.________._._W__.________._...____......................................................................................................................................................................................................................

done