Less bullshit, mainly documents
Official documents https://github.com/yiisoft/yi...

Use of yii2 queue

1. installation

composer require --prefer-dist yiisoft/yii2-queue

2. Configure in common/config/main.php

redis as driver

return [
    'bootstrap' => [
        'queue', // Register this component to the console
    ],
    'components' => [
        'redis' => [
            'class' => \yii\redis\Connection::class,
            // ...
        ],
        'queue' => [
            'class' => \yii\queue\redis\Queue::class,
            'as log' => \yii\queue\LogBehavior::class,//The default error log is console/runtime/logs/app.log
            'redis' => 'redis', // Connection component or its configuration
            'channel' => 'queue', // Queue channel key
        ],
    ],
];

File as driver

return [
    'bootstrap' => [
        'queue', // Register this component to the console
    ],
    'components' => [
        'queue' => [
            'class' => \yii\queue\file\Queue::class,
            'as log' => \yii\queue\LogBehavior::class,//The default error log is console/runtime/logs/app.log
            'path' => '@runtime/queue',
        ],
    ],
];

3. Create a frontend/components/DownloadJob

class DownloadJob extends BaseObject implements \yii\queue\JobInterface
{
    public $url;
    public $file;
    
    public function execute($queue)
    {
        file_put_contents($this->file, file_get_contents($this->url));
    }
}

4. console

The console is used to listen and process queue tasks.
Listening queue under cmd

yii queue/listen

5. Add to queue

To add a task to a queue:

Yii::$app->queue->push(new frontend\components\DownloadJob([
    'url' => 'http://example.com/image.jpg',
    'file' => '/tmp/image.jpg',
]));

Push the task to the queue, delaying 5 minutes to run:

Yii::$app->queue->delay(5 * 60)->push(new frontend\components\DownloadJob([
    'url' => 'http://example.com/image.jpg',
    'file' => '/tmp/image.jpg',
]));

6. test

Execute the program in 5. If the console listens, it will download automatically in the background. http://example.com/image.jpg...

Start worker

You can use supervisor or Systemd to start multi process worker, or Cron. Let's talk about Supervisor here.

The use of centos7 supervisor

1. Install supervisor

yum update
yum install epel-release
yum install -y supervisor
#Boot up
systemctl enable supervisord
#start-up
systemctl start supervisord

2.supervisor command

Supervisor CTL status view process status
 Supervisor CTL reload restart Supervisor 
supervisorctl start|stop|restart start and close the restart process 

3. Add profile

The supervisor configuration file is usually in the / etc / Supervisor. D directory. You can create some configuration files here.
Note: the filename ends with. ini

Here is an example:

[program:yii-queue-worker]
process_name=%(program_name)s_%(process_num)02d
command=/usr/bin/php /var/www/my_project/yii queue/listen --verbose=1 --color=0
autostart=true
autorestart=true
user=www-data
numprocs=4
redirect_stderr=true
stdout_logfile=/var/www/my_project/log/yii-queue-worker.log