用 Google 找 rrdtool howto 就有很多!
這東東可以表示的圖漂亮多了...
以vmstat抓系統為例
抓資料轉成DB
#/bin/sh
#
# vmstat RRD data grabber
#
# written for FREESCO by dingetje (webmaster@dingetje.homeip.net)
# released to the public: 12-Nov-2001
#
# put next line(s) in crontab to run every 5 min.
#
# crontab line for vmstat RRD grabber every 5 min.
#0,5,10,15,20,25,30,35,40,45,50,55 * * * * /mnt/router/packages/rrdtool/scripts/vmstatrrd > /dev/null 2> /dev/null &
#
#
# cd to the location of this script (run by crontab !)
#
cd /tmp
#
# location of RRD database
#
VM_DBASE=/var/www/html/rrdtool/demo/vmstat.rrd
if [ ! -f $VM_DBASE ]; then
echo Creating new vmstat RRD database...
rrdtool create $VM_DBASE \
--step 300 \
DS:r:GAUGE:600:0:U \
DS:b:GAUGE:600:0:U \
DS:w:GAUGE:600:0:U \
DS:swpd:GAUGE:600:U:U \
DS:free:GAUGE:600:U:U \
DS:buff:GAUGE:600:U:U \
DS:si:GAUGE:600:U:U \
DS:so:GAUGE:600:U:U \
DS:bi:GAUGE:600:U:U \
DS:bo:GAUGE:600:U:U \
DS:int:GAUGE:600:U:U \
DS:cs:GAUGE:600:U:U \
DS:user:GAUGE:600:0:100 \
DS:system:GAUGE:600:0:100 \
DS:idle:GAUGE:600:0:100 \
RRA:AVERAGE:0.5:2:2000
fi
#
# collect data, but only if
#
if [ -f $VM_DBASE ]; then
#
# the database exists, and..
#
if [ -f /usr/bin/vmstat ]; then
#
# vmstat is installed...
#
# run vmstat and get the last line
R=`/usr/bin/vmstat 120 2 | tail -1`
set $R
if [ ! -z "$R" ]; then
r=$1; b=$2; w=$3; swpd=$4; free=$5; buff=$6; si=$7; so=$8; bi=$9
shift;shift;shift;shift;shift;shift;shift;shift;shift;shift;
bo=$1; int=$2; cs=$3; user=$4; system=$5; idle=$6
rrdtool update $VM_DBASE \
--template r:b:w:swpd:free:buff:si:so:bi:bo:int:cs:user:system:idle \
N:$r:$b:$w:$swpd:$free:$buff:$si:$so:$bi:$bo:$int:$cs:$user:$system:$idle
fi
fi
fi
轉圖檔sample
rrdtool graph /var/www/html/rrdtool/demo/images/cpu.gif \
--title "CPU Load" \
--imgformat GIF \
--upper-limit 100 \
--lazy \
--rigid \
--imginfo '<IMG SRC=/rrdtool/demo/images/%s ALT="CPU">' \
DEF:system=/var/www/html/rrdtool/demo/vmstat.rrd:system:AVERAGE \
DEF:user=/var/www/html/rrdtool/demo/vmstat.rrd:user:AVERAGE \
DEF:idle=/var/www/html/rrdtool/demo/vmstat.rrd:idle:AVERAGE \
AREA:system#ff0000:"System %" \
STACK:user#ffff00:"User %" \
STACK:idle#00a85a:"Idle %"
rrdtool graph /var/www/html/rrdtool/demo/images/mem.gif \
--title "Memory" \
--imgformat GIF \
--lazy \
--imginfo '<IMG SRC=/rrdtool/demo/images/%s ALT="Memory">' \
DEF:swap=/var/www/html/rrdtool/demo/vmstat.rrd:swpd:AVERAGE \
DEF:free=/var/www/html/rrdtool/demo/vmstat.rrd:free:AVERAGE \
DEF:buffers=/var/www/html/rrdtool/demo/vmstat.rrd:buff:AVERAGE \
DEF:si=/var/www/html/rrdtool/demo/vmstat.rrd:si:AVERAGE \
DEF:so=/var/www/html/rrdtool/demo/vmstat.rrd:so:AVERAGE \
CDEF:swapmb=swap,1024,* \
CDEF:freemb=free,1024,* \
CDEF:bufmb=buffers,1024,* \
CDEF:simb=si,1024,* \
CDEF:somb=so,1024,* \
LINE2:swapmb#ff0000:"Swap Mb" \
LINE2:freemb#009f32:"Free Mb" \
LINE2:bufmb#0000ff:"Buffers Mb" \
LINE2:simb#ff7733:"Swap In" \
LINE2:somb#3377ff:"Swap Out"
rrdtool graph /var/www/html/rrdtool/demo/images/io.gif \
--title "Disk I/O" \
--imgformat GIF \
--lazy \
--imginfo '<IMG SRC=/rrdtool/demo/images/%s ALT="Disk I/O">' \
DEF:bi=/var/www/html/rrdtool/demo/vmstat.rrd:bi:AVERAGE \
DEF:bo=/var/www/html/rrdtool/demo/vmstat.rrd:bo:AVERAGE \
LINE2:bi#ff0000:"In (blocks/s)" \
LINE2:bo#0000ff:"Out (blocks/s)"
rrdtool graph /var/www/html/rrdtool/demo/images/misc.gif \
--title "Misc." \
--imgformat GIF \
--lazy \
--imginfo '<IMG SRC=/rrdtool/demo/images/%s ALT="Misc.">' \
DEF:cs=/var/www/html/rrdtool/demo/vmstat.rrd:cs:AVERAGE \
DEF:intr=/var/www/html/rrdtool/demo/vmstat.rrd:int:AVERAGE \
AREA:cs#ff3377:"Context switches/s)" \
LINE2:intr#0000ff:"Intr/s"
