从一个Docker容器连接到另一个 [英] Connect from one Docker container to another

问题描述

我想在一个docker容器中运行Rabbitmq-server并使用celery从另一个容器连接到它（ http：// celeryproject。 org / ）

I want to run rabbitmq-server in one docker container and connect to it from another container using celery (http://celeryproject.org/)

我使用以下命令运行rabbitmq ...

I have rabbitmq running using the below command...

sudo docker run -d -p :5672 markellul/rabbitmq /usr/sbin/rabbitmq-server

并通过

sudo docker run -i -t markellul/celery /bin/bash

当我尝试做一个非常基本的教程来验证 http://docs.celeryproject.org/en/latest/getting-started/ first-steps-with-celery.html

When I am trying to do the very basic tutorial to validate the connection on http://docs.celeryproject.org/en/latest/getting-started/first-steps-with-celery.html

我收到连接被拒绝的错误：

I am getting a connection refused error:

消费者：无法连接至amqp：//guest@127.0.0.1：5672 //：[Errno 111]
连接

consumer: Cannot connect to amqp://guest@127.0.0.1:5672//: [Errno 111] Connection refused.

当我将rabbitmq与芹菜安装在同一容器上时，效果很好。

When I install rabbitmq on the same container as celery it works fine.

要使容器彼此交互我需要怎么做？

What do I need to do to have container interacting with each other?

推荐答案

现在不建议使用直接链接。链接容器的新方法是 docker网络连接。它的工作原理与虚拟网络非常相似，并且具有比旧的链接方式更广泛的功能。

[edit 2016]

Direct links are deprecated now. The new way to do link containers is docker network connect. It works quite similar to virtual networks and has a wider feature set than the old way of linking.

首先创建命名容器：

docker run --name rabbitmq -d -p :5672 markellul/rabbitmq /usr/sbin/rabbitmq-server
docker run --name celery -it markellul/celery /bin/bash

然后创建一个网络（最后一个参数是您的网络名称） ：

Then you create a network (last parameter is your network name):

docker network create -d bridge --subnet 172.25.0.0/16 mynetwork

将容器连接到新创建的网络：

Connect the containers to your newly created network:

docker network connect mynetwork rabbitmq
docker network connect mynetwork celery

现在，两个容器都是在同一网络中并且可以彼此通信。

Now, both containers are in the same network and can communicate with each other.

可以在使用网络：连接容器。

有一个 Docker 0.6.5中的新功能称为链接，它旨在帮助docker容器之间的通信。

There is a new feature in Docker 0.6.5 called linking, which is meant to help the communication between docker containers.

首先，创建您的Rabbitmq容器照常。请注意，我还使用了新的名称功能，使生活更轻松：

First, create your rabbitmq container as usual. Note that i also used the new "name" feature which makes life a litte bit easier:

docker run --name rabbitmq -d -p :5672 markellul/rabbitmq /usr/sbin/rabbitmq-server

您可以使用链接映射容器的参数（我们在这里使用名称，id也可以）：

You can use the link parameter to map a container (we use the name here, the id would be ok too):

docker run --link rabbitmq:amq -i -t markellul/celery /bin/bash

现在您可以访问IP了， Rabbitmq容器的端口，因为docker自动添加了一些环境变量：

Now you have access to the IP and Port of the rabbitmq container because docker automatically added some environmental variables:

$AMQ_PORT_5672_TCP_ADDR
$AMQ_PORT_5672_TCP_PORT

此外，Docker将源容器的主机条目添加到 / etc / hosts 文件。在此示例中， amq 将是容器中已定义的主机。

来自Docker 文档：

In addition Docker adds a host entry for the source container to the /etc/hosts file. In this example amq will be a defined host in the container.
From Docker documentation:

在/ etc / hosts文件中的主机条目中，如果重新启动源容器，则不会自动更新环境变量中存储的IP地址。我们建议使用/ etc / hosts中的主机条目来解析链接容器的IP地址。

Unlike host entries in the /etc/hosts file, IP addresses stored in the environment variables are not automatically updated if the source container is restarted. We recommend using the host entries in /etc/hosts to resolve the IP address of linked containers.

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