check_interface_load.sh for openwrt

* fixed to eth0 only
 * no redirections
 * echo instead of heredocs

monitoring/icinga2/scripts/openwrt_check_interface_load.sh

@@ -0,0 +1,157 @@
+#!/bin/ash
+# set -x
+START=`date +%s`
+#INTERFACES=`ls /sys/class/net/`
+
+
+while getopts "w:c:h" OPT; do
+        case $OPT in
+                "w") warn=$OPTARG;;
+                "c") crit=$OPTARG;;
+                "h") help;;
+        esac
+done
+
+
+WARNING=$(echo "$warn * 1000000" | bc)
+CRITICAL=$(echo "$crit * 1000000" | bc)
+
+#which iftop > /dev/null 2>&1
+#if [ $? != 0 ]; then
+#        echo "Iftop not installed"
+#        exit 1
+#fi
+
+IFTOP="/usr/bin/iftop"
+PERFDATA=""
+overloaded=""
+ex_st=0
+int=0
+int_ol=0
+for i in eth0;
+do
+        #IF_UP=`cat /sys/class/net/$i/operstate`
+        if [ -e "/sys/class/net/$i/operstate"  ]; then
+                IF_UP=`cat /sys/class/net/$i/operstate 2>&1`
+        else
+                continue
+        fi
+        if [ $IF_UP == "up" ] || [ $IF_UP == "unknown" ]; then
+                INTERFACE=$i
+                TMP_FILE="/tmp/int_${INTERFACE}_cache"
+
+                $IFTOP -i $INTERFACE -n -t -s 2 > $TMP_FILE 2>&1
+                if [ $? != 0 ]; then
+                        rm -f $TMP_FILE
+                        continue
+                fi
+
+                ##### TOTAL ########
+                TOTAL=`cat $TMP_FILE | grep -i 'Total send and receive rate'| awk -F ":" '{print $2}'| awk '{print $1}'`
+                ####################
+                ##### SEND RATE ####
+                SEND=`cat $TMP_FILE | grep -i 'Total send rate'| awk -F ":" '{print $2}'| awk '{print $1}'`
+                ###################
+                #### REC RATE #####
+                REC=`cat $TMP_FILE | grep -i 'Total receive rate'| awk -F ":" '{print $2}'| awk '{print $1}'`
+                ##################
+                rm -f $TMP_FILE 2>&1
+
+
+
+                metric=`echo "$TOTAL" | grep -Eo '[[:alpha:]]+'`
+                TOTAL=${TOTAL/${metric}}
+                TOTAL=`echo "$TOTAL" | sed 's/,/./'`
+
+                if [ $metric == "Mb" ]; then
+                        TOTAL=$(echo "$TOTAL * 1000000" | bc)
+                elif [ $metric == "Kb" ]; then
+                        TOTAL=$(echo "$TOTAL * 1000" | bc)
+                elif [ $metric == "b" ]; then
+                        TOTAL=$TOTAL
+                else
+                        TOTAL=$TOTAL
+                fi
+                TOTAL=${TOTAL%.*}
+
+                metric=`echo "$SEND" | grep -Eo '[[:alpha:]]+'`
+                SEND=${SEND/${metric}}
+                SEND=`echo "$SEND" | sed 's/,/./'`
+
+                if [ $metric == "Mb" ]; then
+                        SEND=$(echo "$SEND * 1000000" | bc)
+                elif [ $metric == "Kb" ]; then
+                        SEND=$(echo "$SEND * 1000" | bc)
+                elif [ $metric == "b" ]; then
+                        SEND=$SEND
+                else
+                        SEND=$SEND
+                fi
+                SEND=${SEND%.*}
+
+                metric=`echo "$REC" | grep -Eo '[[:alpha:]]+'`
+                REC=${REC/${metric}}
+                REC=`echo "$REC" | sed 's/,/./'`
+
+                if [ $metric == "Mb" ]; then
+                        REC=$(echo "$REC * 1000000" | bc)
+                elif [ $metric == "Kb" ]; then
+                        REC=$(echo "$REC * 1000" | bc)
+                elif [ $metric == "b" ]; then
+                        REC=$REC
+                else
+                        REC=$REC
+                fi
+                REC=${REC%.*}
+
+		if [ -z $TOTAL ] ; then
+			TOTAL=0
+		fi
+                if [ $TOTAL -ge $CRITICAL ]; then
+                        overloaded="$overloaded $INTERFACE"
+                        int_ol=$(echo "$int_ol + 1" | bc)
+                        ex_st=2
+                elif [ $TOTAL -lt $CRITICAL ] && [ $TOTAL -ge $WARNING ]; then
+                        overloaded="$overloaded $INTERFACE"
+                        int_ol=$(echo "$int_ol + 1" | bc)
+                        if [ $ex_st -eq 0 ]; then
+                                ex_st=1
+                        fi
+                elif [ $TOTAL -le $WARNING ]; then
+                        if [ $ex_st -eq 0 ]; then
+                                ex_st=0
+                        fi
+                else
+                        echo 0 > /dev/null
+
+                fi
+
+                int=$(echo "$int + 1" | bc)
+                PERFDATA="$PERFDATA Total_$INTERFACE=${TOTAL};${WARNING};${CRITICAL};0;${CRITICAL} Send_$INTERFACE=${SEND}; Receive_$INTERFACE=${REC};"
+
+        elif [ $IF_UP == "down" ]; then
+                echo 0 > /dev/null
+        else
+                echo 0 > /dev/null
+        fi
+done
+
+END=`date +%s`
+EXEC_TIME=$(($END-$START))
+PERFDATA="$PERFDATA ExecTime=$EXEC_TIME;"
+
+if [ $ex_st -eq 0 ]; then
+        echo "OK: $int interfaces under expected load | $PERFDATA"
+        exit $ex_st
+
+elif [ $ex_st -eq 1 ]; then
+        echo "Warning: $int_ol overloaded interfaces ($overloaded); $int interfaces OK | $PERFDATA"
+        exit $ex_st
+elif [ $ex_st -eq 2 ]; then
+        echo "Critical: $int_ol overloaded interfaces ($overloaded); $int interfaces OK | $PERFDATA"
+        exit $ex_st
+else
+        echo "Unknown: $int_ol overloaded interfaces ($overloaded). $int interfaces OK | $PERFDATA"
+        exit 3
+fi
+