#!/bin/sh
RRD_PATH="/root/study/dnsquery.rrd"
IMAGE_PATH="/www/htdocs/mrtg"
#DNS List
host="a.dns.tw b.dns.tw 61.220.48.1 d.dns.tw ns.twnic.net e.dns.tw f.dns.tw"
rrd_data=""
for dns in $host
do
#取得 dig 最後面的所顯示的查詢時間
msec=`/bin/dig @$dns . ns | grep 'Query time' | sed -e 's/.*: \(.*\) [a-z].*/\1/'`
if [ -z $msec ];then
msec=-100
echo "$dns 沒有回應,請您注意"| mail MyEmail -s "$dns 無回應"
fi
rrd_data="$rrd_data:$msec"
done
now=`date +%s`
echo $rrd_data
rrdtool update $RRD_PATH ${now}${rrd_data}
time="day week "
for t in $time
do
rrdtool graph $IMAGE_PATH/dnsquery-$t.jpg \
-t "DNS Query Response Time (${t}ly)" \
-w 600 -h 250 -s `date -d "-1 $t" +%s` -v "msec" -X b \
DEF:a=dnsquery.rrd:a:MAX \
DEF:b=dnsquery.rrd:b:MAX \
DEF:c=dnsquery.rrd:c:MAX \
DEF:d=dnsquery.rrd:d:MAX \
DEF:ns=dnsquery.rrd:ns:MAX \
DEF:f=dnsquery.rrd:f:MAX \
DEF:g=dnsquery.rrd:g:MAX \
CDEF:z0=-1,a,b,c,d,ns,f,g,+,+,+,+,+,+,7,/,* \
CDEF:a1=a,3000,+ \
CDEF:a11=3000,a,a,-,+ \
CDEF:b1=b,2500,+ \
CDEF:b11=2500,a,a,-,+ \
CDEF:c1=c,2000,+ \
CDEF:c11=2000,a,a,-,+ \
CDEF:d1=d,1500,+ \
CDEF:d11=1500,a,a,-,+ \
CDEF:ns1=ns,1000,+ \
CDEF:ns11=1000,a,a,-,+ \
CDEF:f1=f,500,+ \
CDEF:f11=500,a,a,-,+ \
CDEF:g1=g, \
AREA:z0#c0c0c0:"Average Response Time(msec)" \
COMMENT:"\n" \
AREA:a1#ff0000:"a.dns.tw" \
GPRINT:a:MAX:"%12.0lf" \
GPRINT:a:AVERAGE:"%12.0lf" \
GPRINT:a:MIN:"%12.0lf" \
GPRINT:a:LAST:"%12.0lf\n" \
AREA:a11#ffffff \
AREA:b1#800000:"b.dns.tw" \
GPRINT:b:MAX:"%12.0lf" \
GPRINT:b:AVERAGE:"%12.0lf" \
GPRINT:b:MIN:"%12.0lf" \
GPRINT:b:LAST:"%12.0lf\n" \
AREA:b11#ffffff \
AREA:c1#00ff00:"c.dns.tw" \
GPRINT:c:MAX:"%12.0lf" \
GPRINT:c:AVERAGE:"%12.0lf" \
GPRINT:c:MIN:"%12.0lf" \
GPRINT:c:LAST:"%12.0lf\n" \
AREA:c11#ffffff \
AREA:d1#008000:"d.dns.tw" \
GPRINT:d:MAX:"%12.0lf" \
GPRINT:d:AVERAGE:"%12.0lf" \
GPRINT:d:MIN:"%12.0lf" \
GPRINT:d:LAST:"%12.0lf\n" \
AREA:d11#ffffff \
AREA:ns1#0000ff:"ns.twnic.net" \
GPRINT:ns:MAX:"%8.0lf" \
GPRINT:ns:AVERAGE:"%12.0lf" \
GPRINT:ns:MIN:"%12.0lf" \
GPRINT:ns:LAST:"%12.0lf\n" \
AREA:ns11#ffffff \
AREA:f1#000080:"f.dns.tw" \
GPRINT:f:MAX:"%12.0lf" \
GPRINT:f:AVERAGE:"%12.0lf" \
GPRINT:f:MIN:"%12.0lf" \
GPRINT:f:LAST:"%12.0lf\n" \
AREA:f11#ffffff \
AREA:g1#ff8040:"g.dns.tw" \
GPRINT:g1:MAX:"%12.0lf" \
GPRINT:g1:AVERAGE:"%12.0lf" \
GPRINT:g1:MIN:"%12.0lf" \
GPRINT:g1:LAST:"%12.0lf\n" \
COMMENT:"note:<0 means no response\n"
done
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