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I want to send an argument USE_ALPINE to docker file if it is true i will use alpine image if it is false i will use debian image

the default value for USE_ALPINE i want to set it to false.

mchawre
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Nagasitaram Thigulla
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1 Answers1

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Make use of combination of ARG and FROM in Dockerfile.

You can use variables declared in ARG inside FROM statement.

ARG  APP_IMAGE=alpine:latest
FROM ${APP_IMAGE}
CMD  /path/to/mycode

And can also override this value using --build-arg option of docker build command.

docker build -t myapp:v1 --build-arg APP_IMAGE=busybox:latest .
mchawre
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    but the requirement is to use a boolean do we have any possibility to do so? – Nagasitaram Thigulla Jan 20 '21 at 04:32
  • Can;t find any in-built support for boolean flag in docker build. But you can try something with combination of multi-stage builds and arguments. Check this https://stackoverflow.com/a/60820156 – mchawre Jan 20 '21 at 08:03