test/build/volume-perms/Dockerfile


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FROM alpine
VOLUME /vol/subvol
# At this point, the directory should exist, with default permissions 0755, the
# contents below /vol/subvol should be frozen, and we shouldn't get an error
# from trying to write to it because we it was created automatically.
RUN dd if=/dev/zero bs=512 count=1 of=/vol/subvol/subvolfile