Status checker

Description

A library that tells you if any external service your app relies on is broken.

Extremely useful for:

• Creating a command that will show whether the app is ok after deployment
• Creating a status page for your system admins or monitoring software

Requirements

• PHP >=7.4 || >=8.0

Usage

CLI

1. Install the library

composer require nordsec/status-checker

2. Declare an instance for StatusCheckerService (preferably using a container), pass various status checkers that make sense for your project

$container[StatusCheckerService::class] = function (Container $container) {
    $configuration = $container['config'];

    return new StatusCheckerService([
        new DatabaseChecker('database.default_connection', $configuration['database']['default']),
        new RabbitMqChecker('rabbitmq.amqp_server', $configuration['queue']['connection_nordvpn_core']),
    ]);
};

3. If needed, register the command with your application

$container[StatusCheckCommand::class] = function (Container $container) {
    return new StatusCheckCommand([
        $container[StatusCheckerService::class],
    ]);
};

$container[ConsoleApplication::class] = $container->extend(
    ConsoleApplication::class,
    function (ConsoleApplication $consoleApplication, Container $container) {
        $consoleApplication->add($container[StatusCheckCommand::class]);

        return $consoleApplication;
    }
);

4. Run the command

bin/console status:check

WEB

1. Install the library

composer require nordsec/status-checker

2. Declare an instance for StatusCheckerService (preferably using a container), pass various status checkers that make sense for your project

$container[StatusCheckerService::class] = function (Container $container) {
    $configuration = $container['config'];

    return new StatusCheckerService([
        new DatabaseChecker('database.default_connection', $configuration['database']['default']),
        new RabbitMqChecker('rabbitmq.nordvpn_core', $configuration['queue']['connection_nordvpn_core']),
    ]);
};

3. Create an instance of your controller (preferably using a container)

class StatusControllerProvider implements ServiceProviderInterface
{
    public function register(Container $container)
    {
        $container[StatusController::class] = function (Container $container) {
            $configuration = $container['config'];
            return new StatusController(
                $container[StatusCheckerService::class],
            );
        };
    }
}

4. Add needed routes

$app->get('/status', StatusController::class . ':index');
$app->get('/status/details', StatusController::class . ':details');

5. Access the above routes via your browser

• /status produces the overall (global) status
  • if all services produce an OK status it will output {"status":"OK"}
  • if any service fails it will output {"status":"FAIL"}
  • if any service is in maintenance it will output {"status":"MAINTENANCE"}
• /status/details produces more detailed output about the status of every individual service

{"database.default":"OK","database.other":"OK"}

{"database.default":"OK","database.other":"FAIL"}