> For the complete documentation index, see [llms.txt](https://hezhiqiang.gitbook.io/docker/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hezhiqiang.gitbook.io/docker/network/linking.md). # 容器互联 如果你之前有 `Docker` 使用经验，你可能已经习惯了使用 `--link` 参数来使容器互联。 随着 Docker 网络的完善，强烈建议大家将容器加入自定义的 Docker 网络来连接多个容器，而不是使用 `--link` 参数。 ## 新建网络 下面先创建一个新的 Docker 网络。 ```bash $ docker network create -d bridge my-net ``` `-d` 参数指定 Docker 网络类型，有 `bridge` `overlay`。其中 `overlay` 网络类型用于 [Swarm mode](/docker/swarm_mode.md)，在本小节中你可以忽略它。 ## 连接容器 运行一个容器并连接到新建的 `my-net` 网络 ```bash $ docker run -it --rm --name busybox1 --network my-net busybox sh ``` 打开新的终端，再运行一个容器并加入到 `my-net` 网络 ```bash $ docker run -it --rm --name busybox2 --network my-net busybox sh ``` 再打开一个新的终端查看容器信息 ```bash $ docker container ls CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES b47060aca56b busybox "sh" 11 minutes ago Up 11 minutes busybox2 8720575823ec busybox "sh" 16 minutes ago Up 16 minutes busybox1 ``` 下面通过 `ping` 来证明 `busybox1` 容器和 `busybox2` 容器建立了互联关系。 在 `busybox1` 容器输入以下命令 ```bash / # ping busybox2 PING busybox2 (172.19.0.3): 56 data bytes 64 bytes from 172.19.0.3: seq=0 ttl=64 time=0.072 ms 64 bytes from 172.19.0.3: seq=1 ttl=64 time=0.118 ms ``` 用 ping 来测试连接 `busybox2` 容器，它会解析成 `172.19.0.3`。 同理在 `busybox2` 容器执行 `ping busybox1`，也会成功连接到。 ```bash / # ping busybox1 PING busybox1 (172.19.0.2): 56 data bytes 64 bytes from 172.19.0.2: seq=0 ttl=64 time=0.064 ms 64 bytes from 172.19.0.2: seq=1 ttl=64 time=0.143 ms ``` 这样，`busybox1` 容器和 `busybox2` 容器建立了互联关系。 ## Docker Compose 如果你有多个容器之间需要互相连接，推荐使用 [Docker Compose](/docker/compose.md)。 --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://hezhiqiang.gitbook.io/docker/network/linking.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.