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Docker: Add args for the etherpad user's home, UID, GID, and shell

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Now one can create an `etherpad` user and group on the host system and
set the container's UID and GID to match:

    adduser --system --group etherpad &&
    uid=$(id -u etherpad) &&
    gid=$(id -g etherpad) &&
    docker build --build-arg EP_UID="${uid}" --build-arg EP_GID="${gid}" .

This ensures that files created by user `etherpad` inside the
container are owned by user `etherpad` outside the container.
This commit is contained in:
Richard Hansen 2020-05-16 17:34:57 +00:00 committed by John McLear
parent 21cdf0edaa
commit 34d9069874
1 changed files with 15 additions and 5 deletions
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20
Dockerfile
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@ -40,9 +40,19 @@ ENV NODE_ENV=production
#
# Running as non-root enables running this image in platforms like OpenShift
# that do not allow images running as root.
RUN useradd --uid 5001 --create-home etherpad
#
# If any of the following args are set to the empty string, default
# values will be chosen.
ARG EP_HOME=
ARG EP_UID=5001
ARG EP_GID=0
ARG EP_SHELL=
RUN groupadd --system ${EP_GID:+--gid "${EP_GID}" --non-unique} etherpad && \
useradd --system ${EP_UID:+--uid "${EP_UID}" --non-unique} --gid etherpad \
${EP_HOME:+--home-dir "${EP_HOME}"} --create-home \
${EP_SHELL:+--shell "${EP_SHELL}"} etherpad
RUN mkdir /opt/etherpad-lite && chown etherpad:0 /opt/etherpad-lite
RUN mkdir /opt/etherpad-lite && chown etherpad:etherpad /opt/etherpad-lite
# install abiword for DOC/PDF/ODT export
RUN [ -z "${INSTALL_ABIWORD}" ] || (apt update && apt -y install abiword && apt clean && rm -rf /var/lib/apt/lists/*)
@ -55,7 +65,7 @@ USER etherpad
WORKDIR /opt/etherpad-lite
COPY --chown=etherpad:0 ./ ./
COPY --chown=etherpad:etherpad ./ ./
# install node dependencies for Etherpad
RUN src/bin/installDeps.sh && \
@ -68,9 +78,9 @@ RUN src/bin/installDeps.sh && \
RUN for PLUGIN_NAME in ${ETHERPAD_PLUGINS}; do npm install "${PLUGIN_NAME}" || exit 1; done
# Copy the configuration file.
COPY --chown=etherpad:0 ./settings.json.docker /opt/etherpad-lite/settings.json
COPY --chown=etherpad:etherpad ./settings.json.docker /opt/etherpad-lite/settings.json
# Fix permissions for root group
# Fix group permissions
RUN chmod -R g=u .
EXPOSE 9001