不接受在 nodejs alpine docker 上导出图像

Question

我想为 nodejs alpine docker 镜像添加一个 http_proxy 环境变量。

Dockerfile 看起来像这样

FROM node:6-alpine

RUN export
RUN export https_proxy='http://myproxy:8080'
RUN export http_proxy='http://myproxy:8080'
RUN export

运行

时的输出

docker build -t myimage:latest .

看起来像这样

 Step 1/5 : FROM node:6-alpine
 ---> 66cf88e4fc20
 Step 2/5 : RUN export
  ---> Running in 61f5bda7989d
 export HOME='/root'
 export HOSTNAME='26ba10d264c2'
 export NODE_VERSION='6.9.5'
 export NPM_CONFIG_LOGLEVEL='info'
 export PATH='/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'
 export PWD='/'
 export SHLVL='1'
  ---> f04aeb89f7d0
 Removing intermediate container 61f5bda7989d
 Step 3/5 : RUN export https_proxy='http://myproxy:8080'
  ---> Running in 895d13321da8
  ---> 6a8aaa9639a9
 Removing intermediate container 895d13321da8
 Step 4/5 : RUN export http_proxy='http://myproxy:8080'
  ---> Running in 19910745f212
  ---> 1de5b4fb2b2e
 Removing intermediate container 19910745f212
 Step 5/5 : RUN export
  ---> Running in e5d186b66385
 export HOME='/root'
 export HOSTNAME='26ba10d264c2'
 export NODE_VERSION='6.9.5'
 export NPM_CONFIG_LOGLEVEL='info'
 export PATH='/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'
 export PWD='/'
 export SHLVL='1'
  ---> 0aa0f97555bf
 Removing intermediate container e5d186b66385
 Successfully built 0aa0f97555bf

如您所见，shell 上的导出尚未完成！

当我在新构建的图像中打开 shell 并手动执行命令时，它会起作用。

> docker run myimage:latest sh
/ # export https_proxy='http://myproxy:8080'
/ # export http_proxy='http://myproxy:8080'
/ # export 
export HOME='/root'
export HOSTNAME='a759e3d30481'
export NODE_VERSION='6.9.5'
export NPM_CONFIG_LOGLEVEL='info'
export PATH='/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'
export PWD='/'
export SHLVL='1'
export TERM='xterm'
export http_proxy='http://myproxy:8080'
export https_proxy='http://myproxy:8080'

那我做错了什么？

Answer 1

这不是在 Dockerfile 中定义 ENV 变量的正确方法，最好使用 ENV 请参阅文档 https://docs.docker.com/engine/reference/builder/#/env

顺便说一下，将您的运行分组，请参阅解释它的文档

https://docs.docker.com/engine/userguide/eng-image/dockerfile_best-practices/

不接受在 nodejs alpine docker 上导出图像

Export on nodejs alpine docker image is not accepted

node.js

docker

dockerfile

alpine