[原创] 給阿骁兄的賀禮: remote DNS Response monitor , simple version

rrdtool create /root/study/dnsquery.rrd -s 300   \

DS:a:GAUGE:600:-100:10000 \

DS:b:GAUGE:600:-100:10000 \

DS:c:GAUGE:600:-100:10000 \

DS:d:GAUGE:600:-100:10000 \

DS:ns:GAUGE:600:-100:10000 \

DS:f:GAUGE:600:-100:10000 \

DS:g:GAUGE:600:-100:10000 \

RRA:AVERAGE:0.5:1:14400 \

RRA:AVERAGE:0.5:6:4800          \

RRA:AVERAGE:0.5:24:1200         \

RRA:AVERAGE:0.5:288:600         \

RRA:MAX:0.5:1:14400     \

RRA:MAX:0.5:6:4800              \

RRA:MAX:0.5:24:1200             \

RRA:MAX:0.5:288:600

#!/bin/sh

RRD_PATH="/root/study/dnsquery.rrd"

image_path="/www/htdocs/snmp.enum.org.tw/html"



host="a.dns.tw b.dns.tw c.dns.tw d.dns.tw ns.twnic.net e.dns.tw f.dns.tw"

rrd_data=""

for dns in $host

do

        msec=`/bin/dig @$dns . ns | grep 'Query time' | sed -e 's/.*: \(.*\) [a-

z].*/\1/'`

        if [ -z $msec ];then

                msec=-100

                echo "$dns ?#93;有回應,請您注意"| mail your_email@domain -s "$dns 無回應"

        fi

        if [ $msec -ge 3000 ];then

                msec=-100

                echo "$dns 回應遲鈍($msec),請您注意"| mail your_email@domain -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}





#--------------- RRD graph ----------------------------

# CDEF 段主要在用白色蓋掉下面的 AREA

# 以讓每個主機都能有一個 range 顯示 response time(msec)

time="day week "

for t in $time

do

rrdtool graph /www/htdocs/snmp.enum.org.tw/dnsquery-$t.jpg \

-t "DNS Query Response Time (${t}ly)" \

-w 600 -h 250 -s `date -d "-1 $t" +%s`  -v "msec"  -X b         \

        -up-limit=1000 \

        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