使用pika,如何连接运行在docker中的rabbitmq,从docker开始-与外部网络连接?

2022-02-23 00:00:00 python docker docker-compose rabbitmq pika

问题描述

我有以下docker合成文件:

version: '2.3'
networks:
    default: { external: true, name: $NETWORK_NAME } # NETWORK_NAME in .env file is `uv_atp_network`.

services:
    car_parts_segmentor:
#        container_name: uv-car-parts-segmentation
        image: "uv-car-parts-segmentation:latest"
        ports:
            - "8080:8080"
        volumes:
            - ../../../../uv-car-parts-segmentation/configs:/uveye/configs
            - /isilon/:/isilon/
#            - local_data_folder:local_data_folder
        command: "--run_service rabbit"
        runtime: nvidia
        depends_on:
          rabbitmq_local:
            condition: service_started
        links:
          - rabbitmq_local
        restart: always


    rabbitmq_local:
        image: 'rabbitmq:3.6-management-alpine'
        container_name: "rabbitmq"
        ports:
          - ${RABBIT_PORT:?unspecified_rabbit_port}:5672
          - ${RABBIT_MANAGEMENT_PORT:?unspecified_rabbit_management_port}:15672

此程序运行时,docker ps显示

21400efd6493   uv-car-parts-segmentation:latest                             "python /uveye/app/m…"   5 seconds ago   Up 1 second    0.0.0.0:8080->8080/tcp, :::8080->8080/tcp                                                                                            joint_car_parts_segmentor_1
bf4ab8581f1f   rabbitmq:3.6-management-alpine                               "docker-entrypoint.s…"   5 seconds ago   Up 4 seconds   4369/tcp, 5671/tcp, 0.0.0.0:5672->5672/tcp, :::5672->5672/tcp, 15671/tcp, 25672/tcp, 0.0.0.0:15672->15672/tcp, :::15672->15672/tcp   rabbitmq
我要创建到该Rabbitmq的连接。用户:通过是guest:guest

我无法执行此操作,在所有情况下,AMQPConnectionError信息都非常贫乏:

下面的代码在另一个不相关的容器中运行。

connection = pika.BlockingConnection(pika.URLParameters("amqp://guest:guest@rabbitmq/"))
connection = pika.BlockingConnection(pika.URLParameters("amqp://guest:guest@localhost/"))

还尝试了

$ docker inspect -f '{{range.NetworkSettings.Networks}}{{.IPAddress}}{{end}}' rabbitmq
172.27.0.2

connection = pika.BlockingConnection(pika.URLParameters("amqp://guest:guest@172.27.0.2/")) #

还尝试了


    credentials = pika.credentials.PlainCredentials(
        username="guest",
        password="guest"
    )
    parameters = pika.ConnectionParameters(
        host=ip_address, # tried all above options
        port=5672,
        credentials=credentials,
        heartbeat=10,
    )


请注意,容器car_parts_segmentor能够看到容器rabbitmq。两者都由docker-compose启动。


我的假设是这与uv_atp_network两个容器都在其中有关,而我正在尝试从网络外部访问该网络内的坞站。

这真的是问题所在吗?

如果是,如何实现此目标?

面向未来-如何从pika获取更多信息性错误?


解决方案

正如我怀疑的那样,问题是名称rabbitmq仅存在于网络uv_atp_network中。

尝试连接到该网络的代码在其自身的容器中运行,而该容器不在网络中。

解决方案connectcurrent container到网络:

import socket


client = docker.from_env()
network_name = "uv_atp_network"
atp_container = client.containers.get(socket.gethostname())
client.networks.get(network_name).connect(container=atp_container.id)

此后,问题中的上述代码将正常工作,因为rabbitmq可以解析。

connection = pika.BlockingConnection(pika.URLParameters("amqp://guest:guest@rabbitmq/"))

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