Laravel Horizon is Laravel's Redis queue management tool that provides visual monitoring and performance optimization capabilities. 1. Before installation, you need to make sure that you use the Redis driver, have installed Laravel projects and configure the PHP and Redis environment; 2. After installing and publishing resources through Composer, correctly configure the .env and queue.php files; 3. Set access permissions to protect the monitoring panel and only authorize access by specific users; 4. Use the web interface to view the queue status, including the number of tasks, execution time, and failed tasks, etc.; 5. Configure multiple work pools to listen to different queues, and reasonably set the number of processes and retry times to improve efficiency; 6. When handling failed tasks, it is recommended to set the retry logic, add a notification mechanism, and clean up the failure records regularly, and run the migration command if necessary to create a failed task table.

Of course, Laravel Horizon is a powerful queue management tool designed for Laravel's Redis driver queue systems. It provides a beautiful dashboard to monitor and manage your backend tasks (such as email sending, data processing, etc.), and can also help you optimize queue performance.

Here are some practical suggestions and how to use Horizon:

Installation and configuration are the key first steps

Before you start using Horizon, make sure you have met the following conditions:

• Redis as queue driver
• Laravel project installed
• Both PHP and Redis environments work properly

Install Horizon through Composer:

 composer requires laravel/horizon

Then run the Publish command:

 php artisan horizon:install

This generates the necessary configuration files and resources. Next, set QUEUE_CONNECTION to redis in the .env file and make sure the redis connection is configured correctly in config/queue.php .

Monitoring panel allows you to grasp queue status

Horizon provides a web interface to show the current queue's running status, including the number of tasks, execution time, failed tasks and other information.

To access this interface, you need to set access permissions first. In app/Providers/HorizonServiceProvider.php , modify the gate method to control which users can access the dashboard. For example, only allow login for specific email addresses:

 Gate::define('viewHorizon', function ($user) {
    return in_array($user->email, ['you@example.com']);
});

Open the browser to access the /horizon path to see real-time monitoring data. This is very useful for troubleshooting queue backlogs, delays and other issues.

Balance the number of processes and queue priority to improve efficiency

Horizon allows you to configure multiple "supervisors", each of which can listen to different queues and specify how many worker processes to start.

For example, you can configure it like this:

 'environments' => [
    'production' => [
        'supervisor-1' => [
            'connection' => 'redis',
            'queue' => ['default'],
            'processes' => 10,
            'tries' => 3,
        ],
        'supervisor-2' => [
            'connection' => 'redis',
            'queue' => ['high'],
            'processes' => 5,
            'tries' => 3,
        ],
    ],
],

In the example above, we set up two supervisors to handle the queues with default and high priority respectively. Note that the number of processes is not as large as possible , and it should be allocated reasonably in combination with server resources.

Don't ignore failed tasks

When the task fails, Horizon will record it automatically. You can view the reasons for failure, retry tasks, or delete them on its interface.

To better handle failed tasks, it is recommended:

• Add a reasonable number of retry times to the task ( tries )
• Add failed callback logic (such as sending notifications)
• Regularly clean up long-term failed tasks to avoid accumulation

If you use a database to store failed tasks, remember to run the migration:

 php artisan queue:failed-table
php artisan migrate

Basically that's it. Using Laravel Horizon well can greatly improve your ability to control background tasks. Although the configuration is not complicated, details are easily overlooked, especially the permissions and queue priority.

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