awk:Nagios流量监控插件
#!/bin/awk -f #function: nagios插件,针对每个网卡单独设定监控阀值,脚本传递参数阀值时单位为Mbps。 #example: # NAT服务器(WAN:em1, LAN:em2)带宽:下行100Mbps上行约33.3Mbps(假设上行为下行的三分之一),报警阀值按90%计算,nagios每分钟监控一次,如下: #接收(上行):100/3*0.9约等于30Mbps #发送(下行):100*0.9*等于90Mbps #监控所有网卡,nrpe配置如下: #command[check_netcount]=/usr/local/nagios/libexec/check_netcount.awk em1 30 90 em2 90 30 #注:如果是普通单台机器,只指定一个网卡监控即可:网卡名 接收阀值 发送阀值 # #Date:20150129 by yangjy BEGIN { #存放上一次数据的临时文件 last_f="/var/tmp/nagios_net.tmp" run_f="/proc/net/dev" #获取当前所有网卡:设备名、接收数据、发送数据 while (getline runlinelast_f for (i in rundata_r) { print i,rundata_r[i],rundata_t[i] >>last_f } } #未找到临时文件,使用本次获取的各网卡接收和发送数据初始化临时文件(一般在第一次运行时执行) else { if (system("touch "last_f) == 0) { for (j in rundata_r) { print j,rundata_r[j],rundata_t[j] >>last_f lastdata_r[j]=rundata_r[j] lastdata_t[j]=rundata_t[j] } } else { print "CRITICAL - cat not create file:",last_f"." exit 2 } } #获取各网卡及其报警阀值 for (k=1; k = monitor_r[m] ) { critical_r[m] } if (generate_t[m] >= monitor_t[m] ) { critical_t[m] } #原则,只对监控的网卡产生信息和性能数据绘图 status=status"__"m"("monitor_r[m]","monitor_t[m]"):R="generate_r[m]"Mbps,T="generate_t[m]"Mbps" sub(/^__/,"",status) performance=performance""m"_r="generate_r[m]";"monitor_r[m]"; "m"_t="generate_t[m]";"monitor_t[m]"; " } else { print "CRITICAL - wrong dev name." exit 2 } } #如果状态数组都为0,则正常 if (length(critical_r)==0 && length(critical_t)==0 ) { print " OK - "status" | "performance exit 0 } else { #快速确认哪个网卡哪个方向传输报警,收集状态数组信息 for (n in critical_r) { problem_r=problem_r" "n sub(/^ /,"",problem_r) } for (o in critical_t) { problem_t=problem_t" "o sub(/^ /,"",problem_t) } print " CRITICAL - Problem(R:"problem_r", T:"problem_t") - "status" | "performance exit 2 } }
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