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check_memorylinux.md

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##check_memoryfree.pl

check_memoryfree.pl - Checks the memory and swap usage on a Linux server using the free command.

Usage:

	check_memoryfree.pl -ds -c <critical value> -w <warning value> 
	
		-s	Check SWAP space too.
		-c <interger>
			This is the precentage with out % sign.  E.G. 95 would 
			represent 95% utilized.  Default value is 95.
			Exit with a critical status if greater than the 
			percent of free memory.
		-w <interger>
			This is the precentage with out % sign.  E.G. 95 would 
			represent 95% utilized.  Default value is 90.
			Exit with a warning status if greater than the 
			percent of free memory.
		-d Debug

Installation and Configuration

File location and requirements

  • check_memoryfree.pl - Default location is /usr/local/nagios/libexec.

    • Other location NAGIOS_HOME/libexec

  • Linux free command.

Nagios configuration examples

Command Example

Command Name Command Line
check_nrpe_memoryfree $USER1$/check_nrpe -H $HOSTADDRESS$ -t 60 -c check_memfree -a "$ARG1$"

Service Configuration Example 1 - Check Memory Utilization

Check Command Name Argument
Memory Util check_nrpe_memoryfree -w 90 -c 95 -s

NRPE Client Configuration

Add to the nrpe common.cfg

	### Memory Utilization ###
	command[check_memfree]=/usr/local/nagios/libexec/check_memoryfree.pl $ARG1$

##check_memory-linux.pl

check_memory-linux.pl - Checks the memory usage on a Linux server with a SNMP query.

Usage:

	check_memory-linux.pl -c <critical value> -w <warning value> 
						  -C <SNMP Community Name> -h <host>
	
	-c <interger>
		Exit with a critical status if greater than the percent of free memory.
	-w <interger>
		Exit with a warning status if greater than the percent of free memory.
	-C <SNMP Community name>
		The snmp comunity name used by the server.  e.g. public
	-h <hostname>
		The hostname of the server that is being queried.

Installation and Configuration

File location and requirements

  • check_memory-linux.pl - Default location is /usr/local/nagios/libexec on the Nagios XI or Core server.

    • Other location NAGIOS_HOME/libexec
    • This check is executed from the Nagios server.

  • Linux free command.

Nagios configuration examples

Command Example

Service Configuration Example 1 - Check Memory Linux

Check Command Name Arg1 Arg2 Arg3
Check Memory Linux check-linux-snmp-memory SNMP Community Name Warn Crit

Nagios Checks Home