Docker Copy and change owner

Question

Given the following Dockerfile

FROM ubuntu
RUN groupadd mygroup
RUN useradd -ms /bin/bash -G mygroup john
MKDIR /data
COPY test/ /data/test data
RUN chown -R joh         


        

Answer 1

A --chown flag has finally been added to COPY:

COPY --chown=patrick hostPath containerPath

This new syntax seems to work on Docker 17.09.

See the PR for more information.