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synapse/docker/Dockerfile-workers

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# syntax=docker/dockerfile:1
ARG SYNAPSE_VERSION=latest
ARG FROM=matrixdotorg/synapse:$SYNAPSE_VERSION
# first of all, we create a base image with an nginx which we can copy into the
# target image. For repeated rebuilds, this is much faster than apt installing
# each time.
FROM debian:bullseye-slim AS deps_base
RUN \
--mount=type=cache,target=/var/cache/apt,sharing=locked \
--mount=type=cache,target=/var/lib/apt,sharing=locked \
apt-get update -qq && \
DEBIAN_FRONTEND=noninteractive apt-get install -yqq --no-install-recommends \
redis-server nginx-light
# Similarly, a base to copy the redis server from.
#
# The redis docker image has fewer dynamic libraries than the debian package,
# which makes it much easier to copy (but we need to make sure we use an image
# based on the same debian version as the synapse image, to make sure we get
# the expected version of libc.
FROM redis:6-bullseye AS redis_base
# now build the final image, based on the the regular Synapse docker image
FROM $FROM
# Install supervisord with pip instead of apt, to avoid installing a second
# copy of python.
RUN --mount=type=cache,target=/root/.cache/pip \
pip install supervisor~=4.2
RUN mkdir -p /etc/supervisor/conf.d
# Copy over redis and nginx
COPY --from=redis_base /usr/local/bin/redis-server /usr/local/bin
COPY --from=deps_base /usr/sbin/nginx /usr/sbin
COPY --from=deps_base /usr/share/nginx /usr/share/nginx
COPY --from=deps_base /usr/lib/nginx /usr/lib/nginx
COPY --from=deps_base /etc/nginx /etc/nginx
RUN rm /etc/nginx/sites-enabled/default
RUN mkdir /var/log/nginx /var/lib/nginx
RUN chown www-data /var/lib/nginx
# have nginx log to stderr/out
RUN ln -sf /dev/stdout /var/log/nginx/access.log
RUN ln -sf /dev/stderr /var/log/nginx/error.log
# Copy Synapse worker, nginx and supervisord configuration template files
COPY ./docker/conf-workers/* /conf/
# Copy a script to prefix log lines with the supervisor program name
COPY ./docker/prefix-log /usr/local/bin/
# Expose nginx listener port
EXPOSE 8080/tcp
# A script to read environment variables and create the necessary
# files to run the desired worker configuration. Will start supervisord.
COPY ./docker/configure_workers_and_start.py /configure_workers_and_start.py
ENTRYPOINT ["/configure_workers_and_start.py"]
# Replace the healthcheck with one which checks *all* the workers. The script
# is generated by configure_workers_and_start.py.
HEALTHCHECK --start-period=5s --interval=15s --timeout=5s \
CMD /bin/sh /healthcheck.sh