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/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：
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%;;
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
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
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
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 ]
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
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
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
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
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)
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
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
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
