小编seg*_*ult的帖子

我正在使用这个Dockerfile

ARG IMAGE_ONE
FROM ${IMAGE_ONE}
RUN cat /etc/debian_version

ARG IMAGE_TWO
FROM ${IMAGE_TWO}
RUN cat /etc/debian_version

但它失败了,因为它没有使用第二个var IMAGE_TWO:

$ docker build --no-cache --build-arg IMAGE_ONE=debian:7 --build-arg IMAGE_TWO=debian:8 .
Sending build context to Docker daemon  2.048kB
Step 1/6 : ARG IMAGE_ONE
Step 2/6 : FROM ${IMAGE_ONE}
 ---> 90c038768099
Step 3/6 : RUN cat /etc/debian_version
 ---> Running in f842d9cf4f17
7.11
Removing intermediate container f842d9cf4f17
 ---> 0f7f7afdd8a6
Step 4/6 : ARG IMAGE_TWO
 ---> Running in ed3d36f2f9cb
Removing intermediate container ed3d36f2f9cb
 ---> ae4ae3cabc02
Step 5/6 : …