Docker更改在活动集装箱上发布的端口 [英] Docker change published ports on live container

问题描述

我想在活动集装箱上更改发布的端口，例如

I'd like to change the published ports on a live container for example

docker run -p 80:80 --name nginx_live nginx

然后再更改为另一个端口，例如 -p 8080：80

And then later on, change that to another port, example -p 8080:80

推荐答案

Docker没有机制更改已发布的端口一旦它已经开始的容器。当您发布端口时，会发生两件事：

Docker does not have a mechanism for changing the published ports of a container once it has started. When you publish a port, two things happen:

• Docker创建 iptables 将流量重定向到公共端口到容器的 nat 表。


• Docker启动代理服务侦听该端口处理本地生成的流量。

• Docker creates iptables rules in the nat table that redirect traffic to the "public" port to the container.
• Docker starts a proxy service listening on that port to handle locally generated traffic.

虽然您可以在理论上手动更新防火墙规则，使服务在新端口可用，无法解除Docker代理的绑定，因此无法使用该public端口启动任何新服务。

While you could in theory manually update the firewall rules to make the service available at a new port, you would not be able to unbind the Docker proxy and would thus be unable to start any new services using that "public" port.

您最佳的操作方法只是删除容器并重新部署它，或依靠某种前端代理来处理重定向，而不是使用Docker的端口发布机制。

Your best course of action is simply to delete the container and redeploy it, or rely on some sort of front-end proxy to handle the redirect rather than using Docker's port publishing mechanism.

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