Docker tips: Use COPY --chown instead of RUN chown

May 25, 2023 · 1 min read · Post a comment

Here’s a neat tip when building a Dockerfile: make sure to use the --chown parameter when COPY-ing files into the image instead of “wasting” another layer just for the RUN chown .. operation.


  • Docker


So, instead of:

COPY . /appdir
RUN chown -R app:app /appdir

you can have something like this:

COPY --chown=app:app . /appdir


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