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Merge pull request 'bogdanov_dmitry_lab_4' (#100) from bogdanov_dmitry_lab_4 into main
Reviewed-on: Alexey/DAS_2024_1#100
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bogdanov_dmitry_lab_4
34
bogdanov_dmitry_lab_4/README.md
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bogdanov_dmitry_lab_4/README.md
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# Богданов Дмитрий ПИбд-42
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# Лабораторная работа №4
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## Предметная область:
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Автоматизация работы теплицы
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## Результаты выполнения туториалов:
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- Первый туториал:
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
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- Второй туториал:
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
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- Третий туториал:
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
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## Данные из RabbitMQ:
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
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
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
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
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### Вывод:
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Из-за моментальной обработки сообщений в Consumer2, его очередь никогда не заполняется.
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Consumer1 же тратит на обработку 2 секунды, из-за чего соответствующая очередь существенно заполняется при одном
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запущенном экземпляре.
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При нескольких запущенных экземплярах Consumer1 очередь заполняется существенно медленнее, и перестаёт заполняться совсем при определенном кол-ве запущенных экземпляров.
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## [Видео](https://drive.google.com/file/d/1KWHHYWiK8OX48OfhDnEKDtMz-Umfs0uj/view?usp=sharing)
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bogdanov_dmitry_lab_4/Sample Program/consumer1.py
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bogdanov_dmitry_lab_4/Sample Program/consumer1.py
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import pika
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import time
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def callback(ch, method, properties, body):
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print(f'Receiver 1: получено сообщение. {body.decode()}')
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time.sleep(3)
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print('Receiver 1 закончил обработку')
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def consume_events_1():
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connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost', port=5672, credentials=pika.PlainCredentials("user", "password")))
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channel = connection.channel()
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channel.queue_declare(queue='receiver1_queue')
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channel.queue_bind(exchange='greenhouse_events', queue='receiver1_queue')
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channel.basic_consume(queue='receiver1_queue', on_message_callback=callback, auto_ack=True)
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print('Ожидание сообщения...')
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channel.start_consuming()
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if __name__ == "__main__":
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consume_events_1()
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bogdanov_dmitry_lab_4/Sample Program/consumer2.py
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bogdanov_dmitry_lab_4/Sample Program/consumer2.py
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import pika
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def callback(ch, method, properties, body):
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print(f'Receiver 2: получено сообщение. {body.decode()}')
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print('Receiver 2 закончил обработку')
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def consume_events_2():
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connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost', port=5672, credentials=pika.PlainCredentials("user", "password")))
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channel = connection.channel()
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channel.queue_declare(queue='receiver2_queue')
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channel.queue_bind(exchange='greenhouse_events', queue='receiver2_queue')
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channel.basic_consume(queue='receiver2_queue', on_message_callback=callback, auto_ack=True)
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print('Ожидание сообщения...')
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channel.start_consuming()
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if __name__ == "__main__":
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consume_events_2()
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bogdanov_dmitry_lab_4/Sample Program/publisher.py
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bogdanov_dmitry_lab_4/Sample Program/publisher.py
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import pika
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import time
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def publish_events():
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connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost', port=5672, credentials=pika.PlainCredentials("user", "password")))
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channel = connection.channel()
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channel.exchange_declare(exchange='greenhouse_events', exchange_type='fanout')
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events = [
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"Влажность превысила верхнюю границу",
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"Влажность упала за нижнюю границу",
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"Полив начат",
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"Полив остановлен"
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]
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while True:
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event = events[int(time.time()) % len(events)]
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channel.basic_publish(exchange='greenhouse_events', routing_key='', body=event)
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print(f'Отправлено: {event}')
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time.sleep(1)
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if __name__ == "__main__":
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publish_events()
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bogdanov_dmitry_lab_4/Tutorial 1/receive.py
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bogdanov_dmitry_lab_4/Tutorial 1/receive.py
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import pika, sys, os
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def main():
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connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost', port=5672, credentials=pika.PlainCredentials("user", "password")))
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channel = connection.channel()
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channel.queue_declare(queue='hello')
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def callback(ch, method, properties, body):
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print(f" [x] Received {body}")
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channel.basic_consume(queue='hello', on_message_callback=callback, auto_ack=True)
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print(' [*] Waiting for messages. To exit press CTRL+C')
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channel.start_consuming()
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if __name__ == '__main__':
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try:
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main()
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except KeyboardInterrupt:
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print('Interrupted')
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try:
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sys.exit(0)
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except SystemExit:
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os._exit(0)
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bogdanov_dmitry_lab_4/Tutorial 1/send.py
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bogdanov_dmitry_lab_4/Tutorial 1/send.py
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import pika
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connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost', port=5672, credentials=pika.PlainCredentials("user", "password")))
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channel = connection.channel()
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channel.queue_declare('hello')
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channel.basic_publish(exchange='',
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routing_key='hello',
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body='Hello world!')
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print(" [x] Sent 'Hello world!'")
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connection.close()
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bogdanov_dmitry_lab_4/Tutorial 2/new_task.py
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bogdanov_dmitry_lab_4/Tutorial 2/new_task.py
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import pika
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import sys
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connection = pika.BlockingConnection(
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pika.ConnectionParameters(host='localhost', port=5672, credentials=pika.PlainCredentials("user", "password")))
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channel = connection.channel()
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channel.queue_declare(queue='task_queue', durable=True)
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message = ' '.join(sys.argv[1:]) or "Hello World!"
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channel.basic_publish(
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exchange='',
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routing_key='task_queue',
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body=message,
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properties=pika.BasicProperties(
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delivery_mode=pika.DeliveryMode.Persistent
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))
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print(f" [x] Sent {message}")
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connection.close()
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bogdanov_dmitry_lab_4/Tutorial 2/worker.py
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bogdanov_dmitry_lab_4/Tutorial 2/worker.py
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import pika
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import time
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connection = pika.BlockingConnection(
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pika.ConnectionParameters(host='localhost', port=5672, credentials=pika.PlainCredentials("user", "password")))
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channel = connection.channel()
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channel.queue_declare(queue='task_queue', durable=True)
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print(' [*] Waiting for messages. To exit press CTRL+C')
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def callback(ch, method, properties, body):
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print(f" [x] Received {body.decode()}")
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time.sleep(body.count(b'.'))
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print(" [x] Done")
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ch.basic_ack(delivery_tag=method.delivery_tag)
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channel.basic_qos(prefetch_count=1)
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channel.basic_consume(queue='task_queue', on_message_callback=callback)
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channel.start_consuming()
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bogdanov_dmitry_lab_4/Tutorial 3/emit_log.py
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bogdanov_dmitry_lab_4/Tutorial 3/emit_log.py
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import pika
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import sys
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connection = pika.BlockingConnection(
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pika.ConnectionParameters(host='localhost', port=5672, credentials=pika.PlainCredentials("user", "password")))
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channel = connection.channel()
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channel.exchange_declare(exchange='logs', exchange_type='fanout')
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message = ' '.join(sys.argv[1:]) or "info: Hello World!"
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channel.basic_publish(exchange='logs', routing_key='', body=message)
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print(f" [x] Sent {message}")
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connection.close()
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bogdanov_dmitry_lab_4/Tutorial 3/receive_logs.py
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bogdanov_dmitry_lab_4/Tutorial 3/receive_logs.py
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import pika
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connection = pika.BlockingConnection(
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pika.ConnectionParameters(host='localhost', port=5672, credentials=pika.PlainCredentials("user", "password")))
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channel = connection.channel()
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channel.exchange_declare(exchange='logs', exchange_type='fanout')
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result = channel.queue_declare(queue='', exclusive=True)
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queue_name = result.method.queue
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channel.queue_bind(exchange='logs', queue=queue_name)
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print(' [*] Waiting for logs. To exit press CTRL+C')
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def callback(ch, method, properties, body):
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print(f" [x] {body}")
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channel.basic_consume(
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queue=queue_name, on_message_callback=callback, auto_ack=True)
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channel.start_consuming()
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bogdanov_dmitry_lab_4/compose.yaml
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bogdanov_dmitry_lab_4/compose.yaml
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version: '3.8'
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services:
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rabbitmq:
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image: rabbitmq:3-management
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container_name: rabbitmq
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environment:
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RABBITMQ_DEFAULT_USER: user
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RABBITMQ_DEFAULT_PASS: password
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ports:
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- "5672:5672"
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- "15672:15672"
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bogdanov_dmitry_lab_4/images/tut1.png
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