Monitor Apache Web Server Using Mod_status

Monitor Apache Web Server Using Mod_status

Apache is the most well-known and widely used web server around the world. For a Linux system administrator, it is important to monitor and debug Apache performance problems. Mod_status is an Apache module that displays a web page containing statistics about the web server’s current state including worker processes and active connections. It helps to monitor web server load with an HTML interface via a web browser. It is one of the most helpful and easiest modules to configure when you install Apache on Ubuntu.

Apache’s mod_status module shows you the following information:

  • Restart Time
  • Server Uptime
  • Server Load
  • CPU Usage and CPU Load
  • Total incoming requests
  • Total number of bytes and counts server
  • Total number of idle and busy workers

You can see a demo of Apache’s status by visiting the following URL: http://www.apache.org/server-status

By default, mod_status module is enabled in Ubuntu 14.04. If not, you can enable it by running:

To enable access to the server status page, you need to edit the mod_status default configuration file located in the “/etc/apache2/mods-enabled/” directory. You can edit the “status.conf” file by running:

Find the section Location /server-status, remove the # before the 192.0.2.0/24 line and add the IP address of the remote computer you will be using to access your web server:

Save and close the file.

The above configuration is only for the default Apache website. If you have created one or more websites (Virtual Hosts), then the above configuration won’t work. You will need to configure the above settings for each virtual host. In this example let’s configure the Apache default virtual host for mod_status.

You can do this by editing the Apache default virtual host config file:

Add the following lines under the section VirtualHost *:80:

Save and close the file and restart Apache to reflect the changes.

Now, from a remote machine, open your web browser and access the Apache status page using url “http://your-server-ip/server-status“.

apache_mod_status

You will see something like the above page that will give you information of your Apache server’s performance and load.

Apache’s mod_status module is a very useful tool for monitoring a web server’s performance. Monitoring the Apache statistics will help you to configure Apache to achieve the best performance.

One comment

  1. mod_status is only for monitoring servers. I have to go onto the server to check out the status. This is very time consuming. If I want to automate this process, as in, if the server hit a certain number of request then it would send a trap or notification telling me I should look into it. Is there a way I can do this?

    tks

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