Revision 18 - History - Mod rrdtool - Lighttpd - lighty labs

Mod rrdtool » History » Revision 18

Revision 17 (Shtirlic, 2009-03-09 14:44) → Revision 18/19 (Shtirlic, 2012-08-11 10:42)

h1. RRDtool module 

 {{>toc}} 

 *Module: mod_rrdtool* 

 h2. Description 

 "RRD":http://oss.oetiker.ch/rrdtool/ is a system to store and display time-series data (i.e. network bandwidth, machine-room temperature, server load average). 

 h2. Warning 

 * This module will not work if you are using more than one worker ("server.max-worker":Server.max-workerDetails) 

 h2. Options 

 h3. rrdtool.binary 

 path to the rrdtool binary 

     rrdtool.binary = "/usr/bin/rrdtool" 

 h3. rrdtool.db-name 

 filename of the rrd-database. Make sure that <rrdtool.db-name> doesn't exist before the first run, as lighttpd has to create the DB for you. 

     rrdtool.db-name = "/var/www/lighttpd.rrd" 

 h2. Generating Graphs 

 Four things must be done to generate graphs: 

 *Alternative*: Instead of the last three steps (2,3,4), just can use attachment:lightygraph.cgi to automatically generate the graphs as needed -- on the fly! 

 # Enable the mod_rrdtool in lighttpd.conf (as above) 
 # Create/Edit the script provided below (as it generates the graphs).  
   I call it rrdtool.sh, make sure you have eXecute permissions on it (chmod +x) 
 # Create an HTML page to output the images (provided at the end bottom) 
 # Run the script and add to cron. 
   <pre> 
 0,20,40 * * * * nice -n 10 /etc/lighttpd/rrdtool.sh >& /dev/null 
 </pre> 
    Note: Ubuntu fiesty and later remove the & from >& above for cron to run. /bin/sh is linked to /bin/dash and expects a file descriptor rather than a path to send the output to. (bad fd error otherwise) 

 h3. rrdtool.sh 

 <pre> 
 #!/bin/sh 

 RRDTOOL=/usr/bin/rrdtool 
 OUTDIR=/var/www/www.example.com/rrd/ 
 INFILE=/var/www/lighttpd.rrd 
 OUTPRE=lighttpd-traffic 
 WIDTH=400 
 HEIGHT=100 

 DISP="-v bytes --title TrafficWebserver \ 
         DEF:binraw=$INFILE:InOctets:AVERAGE \ 
         DEF:binmaxraw=$INFILE:InOctets:MAX \ 
         DEF:binminraw=$INFILE:InOctets:MIN \ 
         DEF:bout=$INFILE:OutOctets:AVERAGE \ 
         DEF:boutmax=$INFILE:OutOctets:MAX \ 
         DEF:boutmin=$INFILE:OutOctets:MIN \ 
         CDEF:bin=binraw,-1,* \ 
         CDEF:binmax=binmaxraw,-1,* \ 
         CDEF:binmin=binminraw,-1,* \ 
         CDEF:binminmax=binmaxraw,binminraw,- \ 
         CDEF:boutminmax=boutmax,boutmin,- \ 
         AREA:binmin#ffffff: \ 
         STACK:binmax#f00000: \ 
         LINE1:binmin#a0a0a0: \ 
         LINE1:binmax#a0a0a0: \ 
         LINE2:bin#efb71d:incoming \ 
         GPRINT:bin:MIN:%.2lf \ 
         GPRINT:bin:AVERAGE:%.2lf \ 
         GPRINT:bin:MAX:%.2lf \ 
         AREA:boutmin#ffffff: \ 
         STACK:boutminmax#00f000: \ 
         LINE1:boutmin#a0a0a0: \ 
         LINE1:boutmax#a0a0a0: \ 
         LINE2:bout#a0a735:outgoing \ 
         GPRINT:bout:MIN:%.2lf \ 
         GPRINT:bout:AVERAGE:%.2lf \ 
         GPRINT:bout:MAX:%.2lf \ 
         " 

 $RRDTOOL graph $OUTDIR/$OUTPRE-hour.png -a PNG --start -14400 $DISP -w $WIDTH -h $HEIGHT 
 $RRDTOOL graph $OUTDIR/$OUTPRE-day.png -a PNG --start -86400 $DISP -w $WIDTH -h $HEIGHT 
 $RRDTOOL graph $OUTDIR/$OUTPRE-month.png -a PNG --start -2592000 $DISP -w $WIDTH -h $HEIGHT 

 OUTPRE=lighttpd-requests 

 DISP="-v req --title RequestsperSecond -u 1 \ 
         DEF:req=$INFILE:Requests:AVERAGE \ 
         DEF:reqmax=$INFILE:Requests:MAX \ 
         DEF:reqmin=$INFILE:Requests:MIN \ 
         CDEF:reqminmax=reqmax,reqmin,- \ 
         AREA:reqmin#ffffff: \ 
         STACK:reqminmax#00f000: \ 
         LINE1:reqmin#a0a0a0: \ 
         LINE1:reqmax#a0a0a0: \ 
         LINE2:req#00a735:requests" 

 $RRDTOOL graph $OUTDIR/$OUTPRE-hour.png -a PNG --start -14400 $DISP -w $WIDTH -h $HEIGHT 
 $RRDTOOL graph $OUTDIR/$OUTPRE-day.png -a PNG --start -86400 $DISP -w $WIDTH -h $HEIGHT 
 $RRDTOOL graph $OUTDIR/$OUTPRE-month.png -a PNG --start -2592000 $DISP -w $WIDTH -h $HEIGHT 
 </pre> 

 h3. Webpage that displays the graphics 

 <pre> 
 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
 <html> 
 <head> 
         <title>Lighttpd traffic &amp; requests</title> 
         <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> 
         <meta http-equiv="content-style-type" content="text/css"> 
         <style type="text/css"> 
 <!-- 
         div { text-align:center; } 
         img { width:693px; height:431px; } 
 --> 
         </style> 
 </head> 

 <body> 
     <div> 
         <h2>Lighttpd Traffic</h2> 
         <img src="lighttpd-traffic-hour.png"     alt="graph1"><br> 
         <img src="lighttpd-traffic-day.png"      alt="graph2"><br> 
         <img src="lighttpd-traffic-month.png"    alt="graph3"><br> 
     </div> 
     <div> 
         <h2>Lighttpd Requests</h2> 
         <img src="lighttpd-requests-hour.png"    alt="graph4"><br> 
         <img src="lighttpd-requests-day.png"     alt="graph5"><br> 
         <img src="lighttpd-requests-month.png" alt="graph6"><br> 
     </div> 
   </body> 
 </html> 
 </pre> 

 h2. Problems 

 *** is has a pipe open all the time 
 *** it doesn’t handle a restart 

 from http://blog.lighttpd.net/articles/2007/04/10/about-perfection-deprecacting-mod_rrdtool

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Mod rrdtool » History » Revision 18