Nagios Monitoring Configuration Introduction (III)

1. Active monitoring mode

Monitoring Client LNMP Web Services

Server-side:

[[email protected]] #cd/usr/local/nagios/etc/objects

[Email protected] objects]# VI commands.cfg

#在最下面增加:

# ' Check_weburl ' command definition

Define Command{

Command_name Check_weburl

Command_line $USER 1$/check_http $ARG 1$-W 10-c 30

}

Save exit

[[Email protected] objects] #cd/usr/local/nagios/etc/services

Creating an active mode monitoring profile webzd.cfg

[[Email protected] objects] #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

}

Save and exit

Check syntax

[Email protected] @nagios objects]#/etc/init.d/nagios checkconfig

In case of no error:

[Email protected] @nagios objects]#/etc/init.d/nagios Reload

------------------------------------------------------------------

Custom plugins: monitor password files for changes

Client testing:

Generate a MD5 value for/etc/passwd

[Email protected] ~]# MD5SUM/ETC/PASSWD

5e2ebd59c3ebb7bd3c4b09b0674ca746/etc/passwd

Save to/etc/alvin.md5 (file name random, store location arbitrary)

[Email protected] ~]# md5sum/etc/passwd >/ETC/ALVIN.MD5

Analyze MD5 value change, no change show "OK"

[Email protected] ~]# md5sum-c/ETC/ALVIN.MD5

/etc/passwd:ok

Actual combat:

1. Add a custom script to the client

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

[Email protected] libexec~]# chmod +x check_passwd

[email protected] libexec~]# ll CHECK_PASSWD

-rwxr-xr-x 1 root root 166 Jul 21:33 check_passwd

2. Add the command to the client and restart the Nrpe service to make it effective

[[email protected] libexec~] #vim/usr/local/nagios/etc/nrpe.cfg

Add check_passwd Definition Command

command[check_passwd]=/usr/local/nagios/libexec/check_passwd

[[email protected] libexec~] #pkill Nrpe

#重新启动nrpe

[Email protected] libexec~]#/usr/local/nagios/bin/nrpe-c/usr/local/nagios/etc/nrpe.cfg-d

#查看是否启动了

[Email protected] libexec~]ps-ef|grep Nrpe

Nagios 64672 1 0 Dec22? 00:00:21/usr/local/nagios/bin/nrpe-c/usr/local/nagios/etc/nrpe.cfg-d

Root 72255 72099 0 11:48 pts/0 00:00:00 grep Nrpe

3. Testing on the service side

[Email protected] services]#/usr/local/nagios/libexec/check_nrpe-h 10.89.1.34-c check_passwd

passwd is OK

Add Service Script

[[Email protected] ~] #cd/usr/local/nagios/etc/objects/

[Email protected] 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

}

Detect syntax and reload/etc/init.d/nagios checkconfig

In case of no error:

[Email protected] objects]#/etc/init.d/nagios Reload

4. Change Test Execute Add user command on client

[[Email protected] ~] #useradd Jack

Service-Side Execution

[Email protected] services]#/usr/local/nagios/libexec/check_nrpe-h 10.89.1.34-c check_passwd

PASSWD is changed

This article is from the "Knowledge Change Destiny" blog, please be sure to keep this source http://ahtornado.blog.51cto.com/4826737/1885436

Nagios Monitoring Configuration Introduction (III)