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Multi-stage docker build support (using --target in build) does not appear to work

Multi-stage docker build support (using --target in build) does not appear to work

docker build --target build_stage_target -t build_name .

Running the above command in my pipelines does not produce the desired results. The --target flag is apparently ignored, and the build runs all stages before and after the specified stage.

Is this indeed not supported or could I be doing something wrong?

1 answer

1 vote

This is really an issue 😭
@Jason Ryandid you solve the problem?

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Sadly I did not :(

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Ok, thanks!

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Hi @Jason Ryan 👋

In our team we found the answer. This is not a Bitbucket issue, but the Docker itself. BuildKit fixes this bug in multi-stage builds in the legacy docker build engine.

So, just enable the BuildKit by inserting the line

- export DOCKER_BUILDKIT=1

before the docker build command and the image will be built with the specified target.

So simple, bro))

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Like • Jason Ryan likes this

Fascinating. Thank you for sharing!

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Like • Maxim Ugryumov likes this

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Multi-stage docker build support (using --target in build) does not appear to work

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Multi-stage docker build support (using --target in build) does not appear to work

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