一、
i.被监控机上监控内存使用情况，在被监控机上操作
cd /usr/local/nagios/libexec
vi check_mem.sh
#!/bin/bashif [ "$1" = "-w" ] && [ "$2" -gt "0" ] && [ "$3" = "-c" ] && [ "$4" -gt "0" ]; thenmemTotal_b=`free -b |grep Mem |awk '{print $2}'`memFree_b=`free -b |grep Mem |awk '{print $4}'`memBuffer_b=`free -b |grep Mem |awk '{print $6}'`memCache_b=`free -b |grep Mem |awk '{print $7}'`memTotal_m=`free -m |grep Mem |awk '{print $2}'`memFree_m=`free -m |grep Mem |awk '{print $4}'`memBuffer_m=`free -m |grep Mem |awk '{print $6}'`memCache_m=`free -m |grep Mem |awk '{print $7}'`memUsed_b=$(($memTotal_b-$memFree_b-$memBuffer_b-$memCache_b))memUsed_m=$(($memTotal_m-$memFree_m-$memBuffer_m-$memCache_m))memUsedPrc=$((($memUsed_b*100)/$memTotal_b))if [ "$memUsedPrc" -ge "$4" ]; thenecho "Memory: CRITICAL Total: $memTotal_m MB - Used: $memUsed_m MB - $memUsedPrc% used!|TOTAL=$memTotal_b;;;; USED=$memUsed_b;;;; CACHE=$memCache_b;;;; BUFFER=$memBuffer_b;;;;"$(exit 2)elif [ "$memUsedPrc" -ge "$2" ]; thenecho "Memory: WARNING Total: $memTotal_m MB - Used: $memUsed_m MB - $memUsedPrc% used!|TOTAL=$memTotal_b;;;; USED=$memUsed_b;;;; CACHE=$memCache_b;;;; BUFFER=$memBuffer_b;;;;"$(exit 1)elseecho "Memory: OK Total: $memTotal_m MB - Used: $memUsed_m MB - $memUsedPrc% used|TOTAL=$memTotal_b;;;; USED=$memUsed_b;;;; CACHE=$memCache_b;;;; BUFFER=$memBuffer_b;;;;"$(exit 0)fielseecho "check_mem v1.1"echo ""echo "Usage:"echo "check_mem.sh -w <warnlevel> -c <critlevel>"echo ""echo "warnlevel and critlevel is percentage value without %"echo ""echo "Copyright (C) Lukasz Gogolin (lukasz.gogolin@)"exitfi
ii.chmod +x check_mem.sh
测试check_mem脚本是否能正常使用
./check_mem.sh -w 80 -c 90
iii.修改nrpe.cfg
vi /usr/local/nagios/etc/nrpe.cfg
增加一行：command[check_mem]=/usr/lib64/nagios/plugins/check_mem.sh -w 80 -c 90
iiii.重启电脑
iv.执行命令启动nrpe：/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
二、在监控机上添加commands.cfg配置
vi /etc/nagios/objects/commands.cfg
define command{command_name check_memcommand_line $USER1$/check_mem.sh -w $ARG1$ -c $ARG2$}
在被监控机配置文件里面添加vi /usr/local/nagios/etc/objects/linux37.cfg
define service{use generic-servicehost_nameNagios_Centos_Client1service_descriptionMemery Monitoringcheck_command check_nrpe!check_mem}重启nagios即可systemctl restart nagios
三、检查CPU，步骤同上，
把check_cpu.sh 文件放在libexec目录下。
#!/bin/sh# Filename: check_cpu.shprocinfo=`which procinfo 2>/dev/null`sar=`which sar 2>/dev/null`function help {echo -e "\n\tThis plugin shows the % of used CPU, using either procinfo or sar (whichever is available)\n\n\t$0:\n\t\t-c <integer>\tIf the % of used CPU is above <integer>, returns CRITICAL state\n\t\t-w <integer>\tIf the % of used CPU is below CRITICAL and above <integer>, returns WARNING state\n"exit -1}# Getting parameters:while getopts "w:c:h" OPT; docase $OPT in"w") warning=$OPTARG;;"c") critical=$OPTARG;;"h") help;;esacdone# Checking parameters:( [ "$warning" == "" ] || [ "$critical" == "" ] ) && echo "ERROR: You must specify warning and critical levels" && help[[ "$warning" -ge "$critical" ]] && echo "ERROR: critical level must be highter than warning level" && help# Assuring that the needed tools exist:( ( [ -f $procinfo ] && command="procinfo") || [ -f $sar ] ) || \( echo "ERROR: You must have either procinfo or sar installer in order to run this plugin" && exit -1 )# Doing the actual check:idle=`top -b -n 1 | grep Cpu |awk '{print $5}' |cut -f 1 -d "%"`used=10# Comparing the result and setting the correct level:if [[ $used -ge $critical ]]; thenmsg="CRITICAL"status=2else if [[ $used -ge $warning ]]; thenmsg="WARNING"status=1elsemsg="OK"status=0fifi# Printing the results:echo "$msg - CPU used=$used% idle=$idle% | 'CPU Usage'=$used%;$warning;$critical;"# Bye!exit $status
四、Nagios服务端check_nt 检查命令介绍，windows系统的
# 检查本次系统启动总时间
check_nt -H 192.168.1.121 -p 12489 -s 12345 -v UPTIME
# 检查内存占用情况
check_nt -H 192.168.1.121 -p 12489 -s 12345 -v MEMUSE -w 80 -c 90
# 检查客户端版本信息
check_nt -H 192.168.1.121 -p 12489 -s 12345 -v CLIENTVERSION
# 检查5分钟内CPU占用情况
check_nt -H 192.168.1.121 -p 12489 -s 12345 -v CPULOAD -w 80 -c 90 -l 5,80,90
# 检查磁盘C占用情况
check_nt -H 192.168.1.121 -p 12489 -s 12345 -v USEDDISKSPACE -d SHOWALL -l C
# 检查服务状态
check_nt -H 192.168.1.121 -p 12489 -s 12345 -v SERVICESTATE -l Spooler -d SHOWALL
# 检查进程状态
check_nt -H 192.168.1.121 -p 12489 -s 12345 -v PROCSTATE -l spark.exe -d SHOWALL
# 查看所有进程列表
check_nt -H 192.168.1.121 -p 12489 -s 12345 -v INSTANCES -l process
五、一个完整的windows配置文件
[root@nagios objects]# cd winserver[root@nagios winserver]# vi winhost_172.cfg#定义监控主机，设置主机名（不可重复）、别名、IP地址。define host{use windows-serverhost_name winhost_172alias ywzhou_pcaddress 10.188.1.172}#定义主机组，在winserver文件下只需要一个文件定义了主机组，其他文件就不要再定义了。define hostgroup{hostgroup_name windows-serversalias Windows Servers}#第一部分：定义基于check_nt命令的监控服务。#一个配置文件中的service_description不能重复#监控NSClient++客户端软件版本define service{use generic-servicehost_namewinhost_172service_descriptionNSClient++ Versioncheck_command check_nt!CLIENTVERSION}#监控在线时长define service{use generic-servicehost_namewinhost_172service_descriptionUptimecheck_command check_nt!UPTIME}#监控CPU负载，超过80%报警，超过90%严重define service{use generic-servicehost_namewinhost_172service_descriptionCPU Loadcheck_command check_nt!CPULOAD!-l 5,80,90}#监控内存使用情况，超过80%报警，超过90%严重define service{use generic-servicehost_namewinhost_172service_descriptionMemory Usagecheck_command check_nt!MEMUSE!-w 80 -c 90}#监控C盘使用情况，可以复制该组服务来监控其他磁盘define service{use generic-servicehost_namewinhost_172service_descriptionC:\ Drive Spacecheck_command check_nt!USEDDISKSPACE!-l c -w 80 -c 90}#监控系统服务状态（是否启动），默认的W3SVC是IIS的服务，可以复制该组服务来监控其他系统服务#可以在任务管理器中的服务项查看哪些服务器比较重要就监控起来，比如IIS、SQLServer等。define service{use generic-servicehost_namewinhost_172service_descriptionW3SVCcheck_command check_nt!SERVICESTATE!-d SHOWALL -l W3SVC}#监控程序状态（是否运行），默认的Explorer.exe是桌面进程的程序，可以复制该组服务来监控其他系统服务#可以在任务管理器中的进程项查看哪些服务器比较重要就监控起来。define service{use generic-servicehost_namewinhost_172service_descriptionExplorercheck_command check_nt!PROCSTATE!-d SHOWALL -l Explorer.exe}#第二部分：定义基于check plugins的监控服务。#安装NSCP时启用了Enable common check plugins功能#check plugins是位于/usr/local/nagios/libexec下的Nagios自带的监控插件#监控ftp服务define service{use generic-servicehost_namewinhost_172service_descriptionFTPcheck_command check_ftp}#监控http服务define service{use generic-servicehost_namewinhost_172service_descriptionHTTPcheck_command check_http}#监控ssh服务define service{use generic-servicehost_namewinhost_172service_descriptionSSHcheck_command check_ssh}#监控dhcp服务define service{use generic-servicehost_namewinhost_172service_descriptionDHCPcheck_command check_dhcp}#监控pop3服务define service{use generic-servicehost_namewinhost_172service_descriptionPOPcheck_command check_pop}#监控imap服务define service{use generic-servicehost_namewinhost_172service_descriptionIMAPcheck_command check_imap}#监控smtp服务define service{use generic-servicehost_namewinhost_172service_descriptionSMTPcheck_command check_smtp}#监控tcp端口，常用于监控多个网站使用不同端口时，监控端口状态define service{use generic-servicehost_namewinhost_172service_descriptionTCPcheck_command check_tcp!80}
