Ping Docker容器从网络中的另一台机器 [英] Ping Docker Container from another machine in the network

问题描述

我已经创建了一个docker容器，并尝试在容器的bash内ping了www.google.com，它的工作原理。另外我也尝试从主机上ping容器 - 它工作得很好。

I have created a docker container and tried pinging www.google.com within the bash of the container and it works. Also I tried pinging the container from the host - it works perfectly fine.

但是当我尝试从网络中的外部系统ping容器时，它给了我一个请求超时例外。

But when I try to ping the container from a external system in the network, it gives me a request timed out exception.

我计划在容器上安装tomcat webserver，并允许其他容器访问部署在服务器中的应用程序。请谅解一些帮助！

I am planning to install a tomcat webserver on a container and allow other containers to access the application deployed in the server. Would appreciate some help!

推荐答案

默认情况下，您无法从外部主机ping一个Docker容器（要做到这一点，你会有以确保Docker网桥-docker0-具有IP地址，并且您必须在其他主机上配置路由以将Docker主机用作网桥地址范围的网关。）

You cannot ping a Docker container from an external host by default (to do so, you would have to ensure that the Docker network bridge -docker0- has an IP Address, and you would have to configure routes on your other hosts to use you Docker host as a gateway for the bridge address range).

默认情况下，在Docker容器中运行的任何服务都不是已发布（Docker术语），无法从外部访问。您必须在运行容器时明确定义/允许您要发布的服务。

By default, any service running inside a Docker container is not "Published" (Docker terminology) and cannot be reached from outside. You have to explicitly define/allow the services you want to be published when you run your container.

例如，要发布容器的Tomcat应用程序（假设配置为监听端口 8080 ）到主机端口 80 ，您将使用 -p 选项运行您的容器：

For example, to publish your container's Tomcat app (supposing it is configured to listen on port 8080) to port 80 on the host, you would run your container using the -p option :

    docker run -d -p 80:8080 my-tomcat-image:tag 

但是，如果您只想从同一主机上的其他容器访问Tomcat，则不需要配置任何内容。

But if you only want to access Tomcat from other containers on the same host, you don't need to configure anything.

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