docker,

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.

Prerequisites

  • Docker

Solution

So, instead of:

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

you can have something like this:

COPY --chown=app:app . /appdir

Conclusion

In case you face any issues, feel free to leave a comment below and if you find this tutorial useful, follow our official channel on Telegram.

docker