nagios 监控配置介绍(三）
1.主动监控模式监控客户端LNMP 网站服务
服务器端：
#cd /usr/local/nagios/etc/objects
# vi commands.cfg
#在最下面增加：
# 'check_weburl' command definition
define command{
command_name check_weburl
command_line $USER1$/check_http $ARG1$ -w 10 -c 30
}
保存退出
#cd /usr/local/nagios/etc/services
创建主动模式监控配置文件webzd.cfg
#vi webzd.cfg
define service {
use generic-service
host_name 1.34-web
service_description blog_ip
check_command check_weburl! -I 10.89.1.34
max_check_attempts 3
normal_check_interval 2
retry_check_interval 1
check_period 24x7
notification_interval 30
notification_period 24x7
notification_options w,u,c,r
contact_groups admins
process_perf_data 1
}
define service {
use generic-service
host_name 1.34-web
service_description blog_url
check_command check_http! -H bolg.etiantian.org
max_check_attempts 3
normal_check_interval 2
retry_check_interval 1
check_period 24x7
notification_interval 30
notification_period 24x7
notification_options w,u,c,r
contact_groups admins
}
define service {
use generic-service
host_name 1.34-web
service_description blog_port_80
check_command check_tcp!80
max_check_attempts 3
normal_check_interval 2
retry_check_interval 1
check_period 24x7
notification_interval 30
notification_period 24x7
notification_options w,u,c,r
contact_groups admins
}
define service {
use generic-service
host_name 1.34-web
service_description ssh_port
check_command check_tcp! 22
max_check_attempts 3
normal_check_interval 2
retry_check_interval 1
check_period 24x7
notification_interval 30
notification_period 24x7
notification_options w,u,c,r
contact_groups admins
}
define service {
use generic-service
host_name 1.34-web
service_description mysql_port
check_command check_tcp!3306
max_check_attempts 3
normal_check_interval 2
retry_check_interval 1
check_period 24x7
notification_interval 30
notification_period 24x7
notification_options w,u,c,r
contact_groups admins
}
define service {
use generic-service
host_name 1.34-web
service_description rsync
check_command check_tcp!873
max_check_attempts 3
normal_check_interval 2
retry_check_interval 1
check_period 24x7
notification_interval 30
notification_period 24x7
notification_options w,u,c,r
contact_groups admins
}
保存并退出
检查语法
# /etc/init.d/nagios checkconfig
没有错误的情况下：
# /etc/init.d/nagios reload
------------------------------------------------------------------
自定义插件：监控密码文件是否改变
客户端测试：
将/etc/passwd生成md5值
# md5sum /etc/passwd
5e2ebd59c3ebb7bd3c4b09b0674ca746/etc/passwd
保存到/etc/alvin.md5 (文件名随便取，存放的位置任意)
# md5sum /etc/passwd >/etc/alvin.md5
分析md5值是否变化，没有变化显示"OK"
# md5sum -c /etc/alvin.md5
/etc/passwd: OK
实战：
1.在客户端添加自定义脚本
cd /usr/local/nagios/libexec
cat check_passwd
#!/bin/bash
char=`md5sum -c /etc/alvin.md5 2>/dev/null|grep "OK"|wc -l`
if [ $char -eq 1 ];
then
echo "passwd is ok"
exit 0
else
echo "passwd is changed"
exit 2
fi
#添加执行的权限
# chmod +x check_passwd
# ll check_passwd
-rwxr-xr-x 1 root root 166 Jul 22 21:33 check_passwd
2.在客户端增加命令，并重启nrpe服务使之生效
#vim /usr/local/nagios/etc/nrpe.cfg
添加check_passwd定义命令
command=/usr/local/nagios/libexec/check_passwd
#pkill nrpe
#重新启动nrpe
#/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
#查看是否启动了
ps -ef|grep nrpe
nagios 64672 10 Dec22 ? 00:00:21 /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
root 72255720990 11:48 pts/0 00:00:00 grep nrpe
3.在服务端测试
# /usr/local/nagios/libexec/check_nrpe -H 10.89.1.34 -c check_passwd
passwd is ok
添加服务脚本
#cd /usr/local/nagios/etc/objects/
# vi services.cfg
#在后面添加
define service{
use generic-service
host_name 1.34-web-lnmp
service_description check_passwd
check_command check_nrpe!check_passwd
}
检测语法并重新加载/etc/init.d/nagios checkconfig
没有错误的情况下：
# /etc/init.d/nagios reload
4.改变性测试在客户端执行添加用户命令
#useradd jack
服务端执行
# /usr/local/nagios/libexec/check_nrpe -H 10.89.1.34 -c check_passwd
passwd is changed
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