Accessing rabbitmq running on local machine from docker container

Question

I want to test a docker image running a python script subscribing to a rabbitmq queue. I have rabbitmq running on my local machine, and want to test the docker container running on the same machine and have it subscribe to the local rabbimq server.

I want the script to read environment variables 'QUEUE_IP' set in the docker run command.

The python script:

#!/usr/bin/env python
import pika

host = os.environ.get('QUEUE_IP')

connection = pika.BlockingConnection(pika.ConnectionParameters(
    host=host))

channel = connection.channel()

channel.queue_declare(queue='hello')

def callback(ch, method, properties, body):
   print(" [x] Received %r" % body)

channel.basic_consume(callback,
                  queue='hello',
                  no_ack=True)

print(' [*] Waiting for messages. To exit press CTRL+C')
channel.start_consuming()

It doesnt work if QUEUE_IP = 127.0.0.1, and I also tried using the local ip address of the machine, but I only get

pika.exceptions.ProbableAuthenticationError

Is there any easy way of accessing the local rabbitmq from the docker container ?

Answer 1

A solution that works is to simply add the --net=host parameter to docker run, e.g.:

docker run -d --net=host my/container

This way, the host's network is shared with the container and it can access the rabbimq server with the localhost ip (127.0.0.1)