monitor-latency

store result of ping command (% of packet loss and RTT) in rrd file and draw it.

store into rrd file

run "monitor-latency".

#!/bin/sh
exec 2>&1
DAEMON=/usr/irori/sys/monitor-latency/monitor-latency
RRDDIR=/usr/irori/var/monitor-latency
HOSTS='
-h google=www.google.com
-h jpix=www.jpix.ad.jp
-h ec2east=174.129.166.26
-h ec2west=204.236.187.187
-h ec2sg=175.41.168.254
'

if [ ! -x "$DAEMON" ]; then
  echo "not executable: $DAEMON"
  exit 1
fi

exec setuidgid watcher \
  env - PATH="/usr/local/bin:$PATH" \
  envdir ./env \
  $DAEMON -r $RRDDIR -d $HOSTS

draw graph

cp example.html WEBDIR/monitor-latency/index.html
cp loading.gif  WEBDIR/monitor-latency/
cat <<EOF >WEBDIR/monitor-latency/graphs.js
var graphs = [
   "google", "jpix"
  ,"ec2east","ec2west","ec2sg"
];
EOF

specify directory path of rrd files by env var or query string.

A. httpd.conf:

<Location /monitor-latency>
  SetEnv RRD_DIR "/usr/irori/var/monitor-latency"
</Location>

B. add query string "r":

vi WEBDIR/monitor-latency/index.html
       // define "graphs" in graphs.js
       for (var i = 0; i < graphs.length; i++) {
-          draw_graph += '<img class="graph" src="graph.cgi?n='+graphs[i]+'&s=-1d">';
+          draw_graph += '<img class="graph" src="graph.cgi?n='+graphs[i]+'&s=-1d&r=/usr/irori/var/monitor-latency">';
       }
       $("#graph").append(draw_graph);