Nagios Monitoring basic Configuration (ii)

I. Configuring Nagios Services

The Nagios service is run in the main profile nagios.cfg, the monitoring plug-in is called in the configuration file, the operator can set the monitoring plug-in monitoring threshold value (warning value error value); The Nagios service's plug-in compares the monitored data to the monitoring thresholds, showing the monitoring status according to the comparison results:

Monitored data < warning values display OK

Monitored data > warning values < error values display warning

Monitored data > Error values display critical

Problem with Unknown configuration

Pending is getting data

Using the Monitor plugin

[[email protected] nagios-4.2.4]# cd/usr/local/nagios/libexec/> enter the monitoring plugin directory

[[email protected] libexec]#./check_users--help > View Help information

Usage: > Plugin format

Check_users-w <users>-C <users>

Several common plug-in configurations

Current load CPU load check_load ./check_load-w 1.00,3.0 0,6,00-c 2.00,5.00,11.00

Current users log in to the system check_users./check_users-w 1-c 3

HTTP Web service run status check_http ./check_http-h 127.0.0.1

PING Test connectivity check_ping./check_ping-h 192.168.4.254- W 5,10%-C 10,15%

Root Partition root partition check_disk./check_disk-w 50%-C 25%-P/

Swap Usage swap partition check_swap ./check_swap-w 20%-C 10%

Total Processes number of processes Check_procs./check_procs-w 50-c 51-s R

Note: Use of other plugins is required to view Help

[[email protected] libexec]#./check_ Plugin name--help

Ii. Description of the configuration file

[Email protected] libexec]# cd/usr/local/nagios/etc/

/usr/local/nagios/etc/nagios.cfg > master configuration file

/usr/local/nagios/etc/cgi.cfg > Access Permissions Directory

/USR/LOCAL/NAGIOS/ETC/RESOURCE.CFG > macro Definition File

[Email protected] nagios]# vim/usr/local/nagios/etc/resource.cfg

$USER 1$=/usr/local/nagios/libexec > Plugins directory

[[email protected] etc]# ls objects/commands.cfg > Define commands for monitoring

[Email protected] objects]# vim commands.cfg

"Define a keyword for a command"

Define Command{

Command_name command name

Command_line Path/Plugin Name parameter

58}

Check for configuration file statements with no errors

[Email protected] etc]#/usr/local/nagios/bin/nagios-v/usr/local/etc/commands.cfg

Set up an email address to receive alert messages

[Email protected] objects]# vim/usr/local/nagios/etc/objects/contacts.cfg

email [email protected] > Specify user to receive alarm information

Define a template for monitoring time

[[Email protected] objects] #vim/usr/local/nagios/etc/objects/timeperiods.cfg

Defining the Monitor Template

[Email protected] objects]# vim/usr/local/nagios/etc/objects/templates.cfg

Defining Monitoring commands

[Email protected] nagios]# vim/usr/local/nagios/etc/objects/commands.cfg

Defining Monitoring objects

[Email protected] nagios]# vim/usr/local/nagios/etc/objects/localhost.cfg

Define Host{

Use linux-server > template name

host_name localhost > host Name

Alias localhost > aliases Name

Address 127.0.0.1 > Monitored host addresses

Define hostgroup{ > host Group

}

Define service{ > Defining Resources for Host monitoring

Use local-service > template Name

HOST_NAME > host Name

Service_description > Monitoring Resources Description Information

Check_command > Command name

}

Adding new monitoring items to monitor the boot partition of this machine

[[email protected] nagios]# vim/usr/local/nagios/etc/objects/commands.cfg > Define monitoring commands

Define Command {

Command_name Check_local_boot

Command_line/usr/local/nagios/libexec/check_disk-w 50%-C 25%-p/boot/

}

[Email protected] objects]# vim localhost.cfg

157 define service{> Configuring monitored Services

158 use Local-service > Digital Host Monitor Template

159 host_name localhost > Target host name

Service_description Boot > Service Description information

161 Check_command Check_local_boot > use of monitoring commands

162}

[[email protected] objects]# Checknagios > Verify that the syntax is correct

[[email protected] objects]#/etc/init.d/nagios stop > Close

Stopping Nagios (via Systemctl): [OK]

[[email protected] objects]#/etc/init.d/nagios start > Open

Starting Nagios (via Systemctl): [OK]

View in Login screen (default 5 minute refresh)

[[Email protected] Desktop]# Firefox http://192.168.4.21/nagios

Nagios Monitoring basic Configuration (ii)