Kohana-Maintenance

This module provides a way to schedule maintenance windows within which the server will generate 503 errors and display a configurable message.

Installation

Step 1: Download the module into your modules subdirectory.

Step 2: Enable the module in your bootstrap file:

/**
 * Enable modules. Modules are referenced by a relative or absolute path.
 */
Kohana::modules(array(
	'maintenance'       => MODPATH.'maintenance', // Maintenance windows
	// 'auth'       => MODPATH.'auth',       // Basic authentication
	// 'codebench'  => MODPATH.'codebench',  // Benchmarking tool
	// 'database'   => MODPATH.'database',   // Database access
            ...

Step 3: Copy the file maintenance/config/maintenance.php to application/config/maintenance.php and change the values as explained below in the Usage section.

Step 4: Call Maintenance::check() wherever required, for example in the before() method of your custom Controller (explained here). If the server is currently within a configured maintenance window, then an HTTP_Exception_503 will be thrown. You can let your normal error handling catch that, or intercept it with a try {} catch () {} block.

Note: While there are probably ways to get this module to do the check automatically, but sometimes you might not want to conduct this check - e.g. Administrators might need to log in still. So this seems to be the most flexible way to do it.

Usage

Set one or more maintenance windows in the config file as in the example below.

return array
    (
    'windows'=>array(
        array(
            'from' => '2012-06-18 20:00:00 UTC',
            'to' => '2012-06-18 21:10:00 UTC',
            'message' => 'This site is undergoing scheduled maintenance from :from until :to and is unavailable during that time.'
        )
    ),
);

The from and to times are interpreted using DateTime, so the rules and formats given here apply - note that if a timezone isn't specified then the default PHP timezone (usually the server timezone) is used.

Strings :from and :to are replaced in the message with the respective times. See Advanced Usage below for more info on the format and timezone.

Advanced Usage

Normally the :from and :to parameters are re-interpreted into UTC and are given an international-style format (specifically: Y-m-d H:i e).

However, check() has two optional string parameters - $display_timezone and $display_format. Using these it is possible to override the specific timezone or format according to your needs, for example to give the time in the local timezone of the user.