nagios监控mysql主机,nginx,磁盘IO,网卡流量

http://blog.chinaunix.net/uid-28685162-id-3506260.html

nagios安装完成，打开/usr/local/nagios/etc/nagios.cfg去掉cfg_dir=/usr/local/nagios/etc/servers前面的#号，并创建/usr/local/nagios/etc/servers目录（此目录下放被监控机的配置文件），重启nagios服务service nagios restart

/usr/local/nagios/etc/objects/commands.cfg  定义监控的命令,监控每一项都必须先在此配置文件定义监控命令

/usr/local/nagios/etc/objects/contacts.cfg 定义联系人和联系人组，比如联系人naigosadmin，联系人组admins，报警信息也在这里配置

/usr/local/nagios/etc/objects/timeperiods.cfg 定义时间

/usr/local/nagios/etc/objects/templates.cfg 放置监控模板，可在监控服务的时候引用这里面的模板，一般不用改动

/usr/local/nagios/etc/objects/localhost.cfg 如果你要监控本机，那就在这里配置

/usr/local/nagios/etc/servers 放置被监控机的配置文件，比如我监控192.168.1.252的配置文件252.cfg就放这下面

 

监控机：192.168.1.246

被监控机：192.168.1.252，192.168.1.249

操作系统：RHEL5.4

 

一、监控磁盘IO

先下载脚本所需模块

wget http://cpan.wenzk.com/authors/id/T/TO/TONVOON/Nagios-Plugin-0.34.tar.gz

wget http://cpan.wenzk.com/authors/id/S/SF/SFINK/Math-Calc-Units-1.07.tar.gz

wget http://mirror.thekeelecentre.com/distfiles/Params-Validate-0.91.tar.gz

wget http://search.cpan.org/CPAN/authors/id/A/AB/ABIGAIL/Regexp-Common-2.122.tar.gz

wget http://search.cpan.org/CPAN/authors/id/K/KA/KASEI/Class-Accessor-0.31.tar.gz

wget http://search.cpan.org/CPAN/authors/id/A/AD/ADAMK/Config-Tiny-2.12.tar.gz

在被监控机上（也可以监控机上，就是监控本机）解压后安装步骤：

perl Makefile.PL

make

make install

在被监控机上/usr/local/nagios/etc/nrpe.cfg配置文件里添加

command[check_iostat]=/usr/local/nagios/libexec/check_iostat -w 5 -c 10

把脚本check_iostat（见附件）放到被监控机的/usr/local/nagios/libexec/目录下，并赋权限

chmod +x /usr/local/nagios/libexec/check_iostat

Chown nagios:nagios /usr/local/nagios/libexec/check_iostat

测试：[root@Rs-02 libexec]# ./check_iostat -w 5 -c 10

IOSTAT OK - user 0.54 nice 0.01 sys 1.41 iowait 1.37 idle 0.00  | iowait=1.37%;; idle=0.00%;; user=0.54%;; nice=0.01%;; sys=1.41%;;

在监控机/usr/local/nagios/etc/objects/commands.cfg里面添加

define command{

        command_name    check_iostat

        command_line    $USER1$/check_iostat -w $ARG1$ -c $ARG2$

        }

在监控机/usr/local/nagios/etc/servers/252.cfg（被监控机192.168.1.252的配置文件）里添加

define service{

        use                             generic-service

        host_name                       252

        service_description             iostat

        check_command                   check_iostat!5!10

        }

然后检查配置是否有误

/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

提示无误后重启服务service nagios restart

 

二、监控nginx状态

被监控端nginx配置文件nginx.conf的虚拟主机添加

                location /nginx_status {

                        stub_status on;

                        access_log   off;

                }

把check_nginx（见附件）放到监控端/usr/local/nagios/libexec/目录下，并赋权限

chmod +x /usr/local/nagios/libexec/check_nginx

Chown nagios:nagios /usr/local/nagios/libexec/check_nginx

测试：./check_nginx -H 192.168.1.252 -P 80 -p /usr/local/nginx/ -n nginx.pid -s nginx_status -o /tmp/ -w 15000 -c 20000

OK - nginx is running. 1 requests per second, 1 connections per second (1.00 requests per connection) | 'reqpsec'=1 'conpsec'=1 'conpreq'=1.00 ]

/usr/local/nagios/etc/objects/commands.cfg添加

define command{

        command_name    check_nginxstatus

        command_line    $USER1$/check_nginx -H $ARG1$ -P $ARG2$ -p $ARG3$ -n $ARG4$ -o $ARG5$ -w $ARG6$ -c $ARG7$

        }

/usr/local/nagios/etc/servers/252.cfg添加

define service{

        use                             generic-service

        host_name                       252

        service_description             nginx_status

        check_command                   check_nginxstatus!192.168.1.252!80!/usr/local/nginx!nginx.pid!nginx_status!/tmp!15000!20000

        }

重启nagios服务

 

三、监控网卡流量

被监控机/usr/local/nagios/etc/nrpe.cfg里添加

command[check_iftraffic]=/usr/local/nagios/libexec/check_iftraffic -i eth0 -w 50 -c 100 -b 100 -u m

把check_iftraffic（见附件）放到被监控机/usr/local/nagios/libexec/目录下，并赋权限

chmod +x /usr/local/nagios/libexec/check_iftraffic

Chown nagios:nagios /usr/local/nagios/libexec/check_iftraffic

监控端/usr/local/nagios/etc/objects/commands.cfg添加

define command{

         command_name    check_iftraffic

         command_line    $USER1$/check_iftraffic -H $HOSTADDRESS$ -i $ARG1$ -w $ARG2$ -c $ARG3$ -b $ARG4$ -u $ARG5$

}

/usr/local/nagios/etc/servers/252.cfg添加

define service{

        use                             generic-service

        host_name                       252

        service_description             iftraffic

        check_command                   check_nrpe!check_iftraffic!"eth0"!50!100!100!m

        }

重启nagios服务

 

四、监控Mysql主机

用plugin 产生的脚本 check_mysql监控

需要被监控机添加访问

• 据库授权：(登陆DB服务器，进行授权用户名 liuyu,密码linu

• mysql> grant all privileges on *.* to chenwei@192.168.1.246 identified
by '123456';

Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

监控端/usr/local/nagios/etc/objects/commands.cfg添加

define command{

        command_name    check_mysql

        command_line    $USER1$/check_mysql -H $ARG1$ -P $ARG2$ -u $ARG3$ -p $ARG4$

        }

/usr/local/nagios/etc/servers/252.cfg添加

define service{

        use                             generic-service         ; Name of service template to use

        host_name                       252

        service_description             mysql

        check_command                   check_mysql!192.168.1.252!3306!chenwei!123456

#       notifications_enabled           0    此项定义是否发送报警信息，0为关闭，1为开启

        }

重启nagios服务

 

监控脚本在附件里