Monitoring an Apache server

Here are the prerequisites for monitoring Apache with service templates:

• Apache-Data-Rate
• Apache-Requests-Rate
• Apache-Busy-Idle-Workers

On the Apache server activate the mod-status with the command :

a2enmod status 

Restart or reload Apache if necessary.

To limit access to your domain (e.g. example.com), you need to add the following entry in the Apache configuration file : httpd.conf or apache2.conf :

 SetHandler server-status

 Order Deny,Allow
 Deny from all
 Allow from .example.com
 

You can now access your Apache usage statistics from the URL :

http://example.com/server-status

Resources : http://httpd.apache.org/docs/2.2/mod/mod_status.html

Here are the pre-requisites for Apache monitoring using the template:

• Apache-Slow-Requests

Modify the Apache log file configuration to add the length of time in seconds to serve the request (%T in the LogFormat directive) as the last column.

For example:

LogFormat "%h %l %u %t "%r" %>s %b "%{Referer}i" "%{User-Agent}i" %T" combined