rrd

#!/bin/sh

set -e

OID1=KEEPALIVED-MIB::virtualServerStatsConns.1
OID2=KEEPALIVED-MIB::virtualServerStatsConns.2
RRD=/tmp/mygraph.rrd

rm $RRD
rrdtool create $RRD --step 10 \
    DS:IPv4:COUNTER:20:0:1000000 \
    DS:IPv6:COUNTER:20:0:1000000 \
    RRA:AVERAGE:0.5:1:60

i=60
while [ $i -ne 0 ]; do
    i=$((i - 1))
    values=$(snmpget -OqnU -v2c -cpublic localhost $OID1 $OID2 | \
	awk '{print $2}' | tr '\n' ':' | sed 's/:$//')
    echo "$(date +%s) Got ${values}"
    rrdtool update $RRD N:${values}
    sleep 10
done

rrdtool graph graph.png --end now --start end-600s \
    -l 0 \
    DEF:ipv4=$RRD:IPv4:AVERAGE \
    DEF:ipv6=$RRD:IPv6:AVERAGE \
    VDEF:ipv4max=ipv4,MAXIMUM \
    VDEF:ipv4min=ipv4,MINIMUM \
    VDEF:ipv4avg=ipv4,AVERAGE \
    VDEF:ipv6max=ipv6,MAXIMUM \
    VDEF:ipv6min=ipv6,MINIMUM \
    VDEF:ipv6avg=ipv6,AVERAGE \
    COMMENT:"        " \
    COMMENT:"Maximum       " \
    COMMENT:"Average       " \
    COMMENT:"Minimum\l" \
    AREA:ipv4#0000FF:"IPv4" \
    GPRINT:ipv4max:"%6.0lf %Sconn/s" \
    GPRINT:ipv4avg:"%6.0lf %Sconn/s" \
    GPRINT:ipv4min:"%6.0lf %Sconn/s\l" \
    AREA:ipv6#00FF00:"IPv6":STACK \
    GPRINT:ipv6max:"%6.0lf %Sconn/s" \
    GPRINT:ipv6avg:"%6.0lf %Sconn/s" \
    GPRINT:ipv6min:"%6.0lf %Sconn/s\l"