docker 中定義了幾種方式用于暴露容器中的端口，現將其總結如下.

dockerfile 中可以使用EXPOSE

指令

,僅說明容器需要對外暴露的端口，沒有實際的暴露出去

EXPOSE [/...]

啟動容器的時候通過參數指定

# 暴露特定端口到主機的特定端口

docker run -p 80:80

# 暴露容器的所有端口(exposed 端口)到主機的隨機端口

docker run -P

# 添加dockerfile中expose 的端口

docker run -expose

dockerfile EXPOSE 指令

TheEXPOSE

instruction informs Docker that the container listens on the specified network ports at runtime. You can specify whether the port listens on TCP or UDP, and the default is TCP if the protocol is not specified.

TheEXPOSE

instruction does not actually publish the port. It functions as a type of documentation between the person who builds the image and the person who runs the container, about which ports are intended to be published. To actually publish the port when running the container, use the-p

flag on docker run to publish and map on

總結

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