![]() Your Dockerfile would then look like: FROM lambci/lambda:build-python3.7 as buildĬOPY -from=build /var/task/lambdatest.zip /lambdatest.zipĪnd then the build command to extract the zip file would look like: docker buildx build -target=artifact -output type=local,dest=$(pwd)/out/. Using that, you can create a stage that consists of the files you want to export to the host and use the -output option to write that stage to the host rather than to an image. Recently, Docker has been working on buildx which is currently experimental. docker build -t your_imageĭocker run -rm your_image tar -cC /path/in/container. Or it can involve I/O pipes, where you run a tar command inside the container to package the files, and pipe that to a tar command running on the host to save the files. ĭocker cp extract:/path/to/files /path/on/host Typically this involves creating a container a running a docker cp command, along the lines of the following: docker build -t your_image. There are various reasons for that, including security (you don't want an image build dropping a backdoor on a build host in the cloud) and reproducibility (images should not have dependencies outside of their context).Īs a result, you need to take an extra step to extract contexts of an image back to the host. A Dockerfile does not have access to write files out to the host, by design, just as it does not have access to read arbitrary files from outside of the build context. ![]() lambdaignore | xargs zip -9qr /var/task/lambdatest.zip * -x RUN echo "Package size: $(du -sh | cut -f1)" WORKDIR /var/task/venv/lib/python3.7/site-packages # Execute "zip" in bash for explanation of -9qrĭockerfile (updated): FROM lambci/lambda:build-python3.7 RUN pushd /var/task/venv/lib/python3.7/site-packages/ Do you have any ideas? FROM lambci/lambda:build-python3.7 So far I used docker cp :/var/task/lambdatest.zip ~/Desktop but that doesn't work inside my Dockerfile (?). ![]() I now try to export lambdatest.zip to my localhost while building it so I see the. I build the following image with docker build -t mylambda.
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