dockerfile 中 ARG與ENV的區別
阿新 • • 發佈:2019-01-30
- The
ARG
instruction defines a variable that users can pass at build-time to the builder with the docker build command using the--build-arg <varname>=<value>
flag.ARG指令定義了使用者可以在編譯時或者執行時傳遞的變數,如使用如下命令:--build-arg <varname>=<value>
- The
ENV
instruction sets the environment variable<key>
<value>
. The environment variables set usingENV
will persist when a container is run from the resulting image.ENV指令是在dockerfile裡面設定環境變數,不能在編譯時或執行時傳遞。
You can then either build an image with a specificARG var ENV var=${var}
var
value at build-time (docker build --build-arg var=xxx
docker run -e var=yyy
)
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檢視原文:http://zccbbg.top/2017/06/19/dockerfile-%e4%b8%ad-arg%e4%b8%8eenv%e7%9a%84%e5%8c%ba%e5%88%ab/