Nagios Monitor Traffic Script

Demand is that we need to monitor the traffic on the server, there is a circulating check_traffic.sh on the network, it needs to be monitored by the machine to turn on SNMP. But it feels like you're using Nagios and you have to open SNMP ... A bit of axe scissors together with the feeling, so I wrote a monitor the flow of the shell:

#!/bin/shusage () {echo "Usage: $ [-n <eth0>] [-W &LT;TX Rx>] [-C <tx Rx>]" 1>&2; exit 1;} FOUNDW=0;FOUNDC=0;FOUNDN=0;FOR item in [email protected]; do if [[$FOUNDN = = 1]];        Then n= $item;        foundn=2;    Continue fi if [[$FOUNDW = = 1]];        Then w1= $item;        foundw=2;    Continue fi if [[$FOUNDW = = 2]];        Then w2= $item;        foundw=3;    Continue fi if [[$FOUNDC = = 1]];        Then c1= $item;        foundc=2;    Continue fi if [[$FOUNDC = = 2]];        Then c2= $item;        foundc=2;    Continue fi if [["$item" = = "-W"]];        Then foundw=1;    Continue fi if [["$item" = = "-C"]];        Then foundc=1;    Continue fi if [["$item" = = "n"]];        Then foundn=1;    Continue Fidoneif [-Z "${W1}"] | | [-Z "${W2}"] | | [-Z "${C1}"] | | [-Z "${C2}"] | | [-Z "${n}"]; Then usagefir1= ' cat/sys/class/net/$n/statistics/rx_bytes ' t1= 'cat/sys/class/net/$n/statistics/tx_bytes ' sleep 1r2= ' cat/sys/class/net/$n/statistics/rx_bytes ' T2= ' cat/sys/class/ net/$n/statistics/tx_bytes ' tbps= ' expr $T 2-$T 1 ' rbps= ' expr $R 2-$R 1 ' tmbps= ' expr $TBPS/1024/128 ' rmbps= ' expr $RBPS/10 24/128 ' If [[$TMBPS-ge $c 1]] | | [[$RMBPS-ge $c 2]];    Then echo "Critical-current is ${tmbps}, ${rmbps}"; Exit 2;fiif [[$TMBPS-ge $w 1] | | [[$RMBPS-ge $w 2]];    Then echo "Warning-current is ${tmbps}, ${rmbps}"; Exit 1;fiecho "Ok-current is ${tmbps}, ${rmbps}"; Exit 0;

The values for both W and C are in megabytes.

Nagios Monitor Traffic Script