Webalizer on Centos 5
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Webalizer is an industry standard statistics generation tool. It is useful to analyze traffic to your web server while still remaining lightweight enough not to hinder performance. Webalizer can even identify your user base using GeoIP services.
We assume you’ve followed the steps outlined in our Setting Up and Securing a Compute Instance. All configuration will be performed in a terminal session; make sure you’re logged into your Linode as root via SSH. We’ll also be installing the Apache 2 web server with very minimal configuration. If you already have Apache installed and configured, feel free to skip these steps. If this is your first time installing Apache on this Linode, make sure to read the installation guide for additional guidance.
Set the Hostname
Before you begin installing and configuring the components described in this guide, please make sure you’ve followed our instructions for setting your hostname. Issue the following commands to make sure it is set properly:
hostname hostname -f
The first command should show your short hostname, and the second should show your fully qualified domain name (FQDN).
Install Required Software
Make sure your package repositories and installed programs are up to date by issuing the following commands:
If you already have Apache installed and configured, you can safely skip this section of the guide. Install Apache by running the following command:
yum install httpd
Issue the following sequence of commands to start Apache for the first time and ensure that the service restarts following the next reboot:
As mentioned earlier, you will need to go to the installation guide if you wish to configure your server beyond the default configuration.
At this point we’re able to install the required packages for Webalizer. Run the following command:
yum install webalizer
Configuring Webalizer for Virtual Hosts
This section assumes that you’ve already configured at least one virtual host. If you do not have virtual hosting configured, please refer to the guide for
installing Apache to further clarify this process and create at least one virtual host. Then, webalizer can generate distinct statistic sets for multiple virtual hosts, using the
webalizer command line with arguments to process statistics for different virtual host log files. The syntax resembles the following:
webalizer -n hostname -o /path/to/webalizer/output /path/to/logfile.log
To process multiple virtual hosts, create a shell script. In this case, there are three virtual hosts. Be sure to substitute the correct hostname and paths for your particular virtual host configuration.
- File: /opt/webalizerScript.sh
1 2 3 4
#!/bin/sh webalizer -n tunahoagie -o /srv/www/example.com/public_html/webalizer /srv/www/example.com/logs/access.log webalizer -n tofuhoagie -o /srv/www/example.org/public_html/webalizer /srv/www/example.org/logs/access.log webalizer -n fuzzyshambler -o /srv/www/fuzzyshambler.com/public_html/webalizer /srv/www/fuzzyshambler.com/logs/access.log
Make the script executable:
chmod +x /opt/webalizerScript.sh
Delete the default
/etc/cron.daily/00webalizer script with the following command:
rm -r /etc/cron.daily/00webalizer
Issue the following command to remove the default webalizer integration with Apache and restart the web server process:
mv /etc/httpd/conf.d/webalizer.conf /etc/httpd/conf.d/webalizer /etc/init.d/httpd restart
Finalizing Webalizer Configuration
webalizer configured, you must create the
webalizer/ directories in each virtual host’s document root before the software runs the first time. Issue the following commands, substituting the correct paths for your virtual hosting configuration:
mkdir -p /srv/www/example.com/public_html/webalizer mkdir -p /srv/www/example.org/public_html/webalizer mkdir -p /srv/www/fuzzyshambler.com/public_html/webalizer
Securing Webalizer Output Directories
webalizer script has been tested, we recommend that you place some sort of security on the Webalizer output directories to prevent unauthorized access. Consider using
rule based authentication or
authentication based access control to limit access to these files.
Testing the Webalizer Script
Now that you have created a Webalizer script, you must make sure it actually works. First, you must give Webalizer an Apache log file to parse. One way to do this is to visit your site and refresh the page a few times. You can also accomplish this via the command line with the following:
wget www.example.com wget www.example.org wget www.fuzzyshambler.com
Then, issue the following command:
Check your Webalizer directory in each virtual host’s document root by pointing your browser to your website(s). In this example the URL is located at
http://www.example.com/webalizer. Enter your password and take a look at the statistics. Repeat this for each virtual host to verify that your usage statistics were generated for each one.
Creating a Webalizer Cron Job
Many administrators generate their Webalizer statistics automatically every day. You can generate statistics daily using a cron job that runs the
webalizerScript.sh script created above. Create a symbolic link from the
/etc/cron.daily/ directory to the
/opt/webalizerScript.sh file. Issue the following commands:
cd /etc/cron.daily ln -s /opt/webalizerScript.sh
Congratulations, you have successfully installed Webalizer! You can leave future usage statistics generation to cron!
Even with a low traffic site, Apache logs can become large. If your logs are routinely large, processing those logs can be time-consuming. You should consider log rotation to prevent potential performance issues.
You may wish to consult the following resources for additional information on this topic. While these are provided in the hope that they will be useful, please note that we cannot vouch for the accuracy or timeliness of externally hosted materials.
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