Apache HTTP Server comes with a handy mod_status for monitoring current status and performance of itself. However, mod_status doesn't show the performance in the past. I like the historical data because it would help me to find problem occured since last crash.

In this post, I assume below directory structure.

/usr/local/www/apache22/data/server-monitor
    +- data
    |- graph
    |- scripts
    |   +- apache-monitor
    |   |- apache-monitor-graph
    |   `- run
    |- day.html
    |- hour.html
    `- index.html

Follow below steps to create directories.

cd /usr/local/www/apache22/data
mkdir server-monitor
cd server-monitor
mkdir data
mkdir graph
mkdir scripts

And then create additional components.

Apache httpd Tools

I extensively use Apache httpd Tools as the main tool for retrieving status of httpd and plotting graphs.

wget http://www.apachesecurity.net/download/snapshot/apache_tools-snapshot.tar.gz
tar xzvf apache_tools-snapshot.tar.gz
cp apache_tools/apache-monitor /usr/local/www/apache22/data/server-monitor/scripts
cp apache_tools/apache-monitor-graph /usr/local/www/apache22/data/server-monitor/scripts

scripts/run

#!/bin/sh

NAME=cz
URL=http://www.mydomain.com/server-status
DURATIONS="3600 86400"

APACHE_PATH=/usr/local/www/apache22/data
BASE_PATH=$APACHE_PATH/server-monitor
SCRIPT_PATH=$BASE_PATH/scripts
DATA_PATH=$BASE_PATH/data
GRAPH_PATH=$BASE_PATH/graph

rm -f "$DATA_PATH/$NAME.dat"
$SCRIPT_PATH/apache-monitor "$DATA_PATH/$NAME" "$URL"
for duration in $DURATIONS; do
  $SCRIPT_PATH/apache-monitor-graph "$DATA_PATH/$NAME" "$GRAPH_PATH" "$duration"
done

Don't forget to let it executable.

chmod +x /usr/local/www/apache22/data/server-monitor/scripts/run

day.html

Day

hour.html

Hour

index.html

Hour
Day

/etc/crontab

Add below line at the bottom of /etc/crontab.

*/1     *       *       *       *       root    /usr/local/www/apache22/data/server-monitor/scripts/run

Tags: apache, monitoring