如何使用 docker-compose v2 加入默认桥接网络? [英] How to join the default bridge network with docker-compose v2?

问题描述

我尝试设置一个 nginx-proxy 容器以通过端口上的子域访问我的其他容器80 而不是特殊端口.如您所料，我无法让它工作.

I tried to setup an nginx-proxy container to access my other containers via subdomains on port 80 instead of special ports. As you can guess, I could not get it to work.

我对 docker 本身有点陌生，发现编写 docker-compose.yml 文件对我来说更舒服，所以我不必经常编写很长的 docker run... 命令.我认为使用 docker 或 docker-compose 启动容器的方式没有区别.但是，我注意到的一个区别是使用 docker 启动容器不会创建任何新网络，但是使用 docker-compose 将有一个 xxx_default> 之后的网络.

I'm kind of new to docker itself and found that it's more comfortable for me to write docker-compose.yml files so I don't have to constantly write long docker run ... commands. I thought there's no difference in how you start the containers, either with docker or docker-compose. However, one difference I noticed is that starting the container with docker does not create any new networks, but with docker-compose there will be a xxx_default network afterwards.

我读到不同网络上的容器无法相互访问，这可能是 nginx-proxy 没有将请求转发到其他容器的原因.但是，我无法找到一种方法来配置我的 docker-compose.yml 文件以不创建任何新网络，而是像 docker run 那样加入默认网桥网络.

I read that containers on different networks cannot access each other and maybe that might be the reason why the nginx-proxy is not forwarding the requests to the other containers. However, I was unable to find a way to configure my docker-compose.yml file to not create any new networks, but instead join the default bridge network like docker run does.

我尝试了以下方法，但结果显示我无法像这样加入系统网络:

I tried the following, but it resulted in an error saying that I cannot join system networks like this:

networks:
  default:
    external:
      name: bridge

我也试过network_mode:bridge，但这似乎没有任何区别.

I also tried network_mode: bridge, but that didn't seem to make any difference.

我必须如何编写 docker-compose.yml 文件才能不创建新网络，或者根本不可能?

How do I have to write the docker-compose.yml file to not create a new network, or is that not possible at all?

额外问题:docker 和 docker-compose 之间是否还有其他我应该知道的区别?

Bonus question: Are there any other differences between docker and docker-compose that I should know of?

推荐答案

向 docker-compose.yml 中的每个服务添加 network_mode: bridge 将阻止 compose 创建一个网络.

Adding network_mode: bridge to each service in your docker-compose.yml will stop compose from creating a network.

如果没有使用此网桥(或主机)配置任何服务，将创建一个网络.

If any service is not configured with this bridge (or host), a network will be created.

经过测试和确认:

version: "2.1"

services:
  app:
    image: ubuntu:latest
    network_mode: bridge

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