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Dockerfile
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# syntax=docker/dockerfile:1
FROM alpine:3
WORKDIR /script
RUN apk add -u --no-cache \
dumb-init bash docker curl xz tar pigz zstd
ADD --link --chown=0:0 --chmod=775 \
# https://github.com/loomchild/volume-backup/blob/d31abfbdae62c68e619b629d9769c9f13944e7cd/volume-backup.sh
https://raw.githubusercontent.com/loomchild/volume-backup/d31abfbdae62c68e619b629d9769c9f13944e7cd/volume-backup.sh .
ADD --link --chown=0:0 --chmod=775 \
# MIT
# https://github.com/loomchild/volume-backup/blob/d31abfbdae62c68e619b629d9769c9f13944e7cd/LICENSE
https://raw.githubusercontent.com/loomchild/volume-backup/d31abfbdae62c68e619b629d9769c9f13944e7cd/LICENSE /licenses/volume-backup.LICENSE
COPY --link --chown=0:0 --chmod=775 \
script/* .
# MIT
COPY --link --chown=0:0 --chmod=775 \
LICENSE /licenses/LICENSE
# This docker image is designed to be executed with root privileges in order to handle volume files with any permissions.
USER 0
VOLUME [ "/volume", "/backup" ]
ENTRYPOINT [ "dumb-init", "--" ]
CMD [ "./volume-backup.sh", "-h" ]