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w-k-s/README.md

Created February 14, 2025 18:36
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Extracting files from Docker Images
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README.md

  1. View Files in Docker Image

    brew install dive
dive grycap/cowsay:latest

Find the folder of interest from dive (you can use control-M to hide modified files, control-R to hide removed files, control-B to hide file attribites, so that you only see files added to the docker image). See commands here

  1. Download files from the docker image

Once you know which file you want to download e.g. /usr/share/nginx/html.

brew install crane
mkdir /tmp/extracted_html
crane export grycap/cowsay:latest - | tar -xvf - -C /tmp/extracted_html usr/share/nginx/html

In this case, the contents of /usr/share/nginx/html will be copied to /tmp/extracted_html on the host machine. Note, you need to exclude the root / when specifying the path in the docker image.

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