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# syntax=docker/dockerfile:1
# Dockerfile to build the matrixdotorg/synapse docker images.
#
# Note that it uses features which are only available in BuildKit - see
# https://docs.docker.com/go/buildkit/ for more information.
#
# To build the image, run `docker build` command from the root of the
# synapse repository:
#
# DOCKER_BUILDKIT=1 docker build -f docker/Dockerfile .
#
# There is an optional PYTHON_VERSION build argument which sets the
# version of python to build against: for example:
#
# DOCKER_BUILDKIT=1 docker build -f docker/Dockerfile --build-arg PYTHON_VERSION=3.10 .
#
# Irritatingly, there is no blessed guide on how to distribute an application with its
# poetry-managed environment in a docker image. We have opted for
# `poetry export | pip install -r /dev/stdin`, but there are known bugs in
# in `poetry export` whose fixes (scheduled for poetry 1.2) have yet to be released.
# In case we get bitten by those bugs in the future, the recommendations here might
# be useful:
# https://github.com/python-poetry/poetry/discussions/1879#discussioncomment-216865
# https://stackoverflow.com/questions/53835198/integrating-python-poetry-with-docker?answertab=scoredesc
ARG PYTHON_VERSION=3.9
###
### Stage 0: generate requirements.txt
###
FROM docker.io/python:${PYTHON_VERSION}-slim as requirements
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# RUN --mount is specific to buildkit and is documented at
# https://github.com/moby/buildkit/blob/master/frontend/dockerfile/docs/syntax.md#build-mounts-run---mount.
# Here we use it to set up a cache for apt (and below for pip), to improve
# rebuild speeds on slow connections.
RUN \
--mount=type=cache,target=/var/cache/apt,sharing=locked \
--mount=type=cache,target=/var/lib/apt,sharing=locked \
apt-get update && apt-get install -y git \
&& rm -rf /var/lib/apt/lists/*
# We install poetry in its own build stage to avoid its dependencies conflicting with
# synapse's dependencies.
# We use a specific commit from poetry's master branch instead of our usual 1.1.12,
# to incorporate fixes to some bugs in `poetry export`. This commit corresponds to
# https://github.com/python-poetry/poetry/pull/5156 and
# https://github.com/python-poetry/poetry/issues/5141 ;
# without it, we generate a requirements.txt with incorrect environment markers,
# which causes necessary packages to be omitted when we `pip install`.
#
# NB: In poetry 1.2 `poetry export` will be moved into a plugin; we'll need to also
# pip install poetry-plugin-export (https://github.com/python-poetry/poetry-plugin-export).
RUN --mount=type=cache,target=/root/.cache/pip \
pip install --user git+https://github.com/python-poetry/poetry.git@fb13b3a676f476177f7937ffa480ee5cff9a90a5
WORKDIR /synapse
# Copy just what we need to run `poetry export`...
COPY pyproject.toml poetry.lock /synapse/
RUN /root/.local/bin/poetry export --extras all -o /synapse/requirements.txt
###
### Stage 1: builder
###
FROM docker.io/python:${PYTHON_VERSION}-slim as builder
# install the OS build deps
RUN \
--mount=type=cache,target=/var/cache/apt,sharing=locked \
--mount=type=cache,target=/var/lib/apt,sharing=locked \
apt-get update && apt-get install -y \
build-essential \
libffi-dev \
libjpeg-dev \
libpq-dev \
libssl-dev \
libwebp-dev \
libxml++2.6-dev \
libxslt1-dev \
openssl \
rustc \
zlib1g-dev \
&& rm -rf /var/lib/apt/lists/*
# To speed up rebuilds, install all of the dependencies before we copy over
# the whole synapse project, so that this layer in the Docker cache can be
# used while you develop on the source
#
# This is aiming at installing the `[tool.poetry.depdendencies]` from pyproject.toml.
COPY --from=requirements /synapse/requirements.txt /synapse/
RUN --mount=type=cache,target=/root/.cache/pip \
Workaround pip bug installing latest treq and not-latest twisted from hashes (#12439) The requirements file generated by `poetry export` isn't correctly processed by `pip install -r requirements.txt`. It contains twisted and treq, both pinned to 22.2.0. When `pip` installs treq, it notices that `Twisted[tls]` is required. It then tries to acquire the latest twisted release, only to fail (because this hash isn't listed in the requirements file).From e.g. https://github.com/matrix-org/synapse/runs/5977154990?check_suite_focus=true > ``` > #15 9.204 Collecting Twisted[tls]>=18.7.0 > #15 9.205 ERROR: In --require-hashes mode, all requirements must have their versions pinned with ==. These do not: > #15 9.205 Twisted[tls]>=18.7.0 from https://files.pythonhosted.org/packages/db/99/38622ff95bb740bcc991f548eb46295bba62fcb6e907db1987c4d92edd09/Twisted-22.4.0-py3-none-any.whl#sha256=f9f7a91f94932477a9fc3b169d57f54f96c6e74a23d78d9ce54039a7f48928a2 (from treq==22.2.0->-r /synapse/requirements.txt (line 724)) > #15 ERROR: executor failed running [/bin/sh -c pip install --prefix="/install" --no-warn-script-location -r /synapse/requirements.txt]: exit code: 1 > ``` The underlying pip issue is https://github.com/pypa/pip/issues/9644. A comment notes that one can avoid this behaviour with by `pip install`ing with the `--no-deps` flag. Let us do so. (At first glance, the problem looks like https://github.com/python-poetry/poetry/issues/5311, but that was a bug in `poetry install`; this is `poetry export`, whose behaviour is fine AFAICS).
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pip install --prefix="/install" --no-deps --no-warn-script-location -r /synapse/requirements.txt
# Copy over the rest of the synapse source code.
COPY synapse /synapse/synapse/
# ... and what we need to `pip install`.
COPY pyproject.toml README.rst /synapse/
# Install the synapse package itself.
RUN pip install --prefix="/install" --no-deps --no-warn-script-location /synapse
###
### Stage 2: runtime
###
FROM docker.io/python:${PYTHON_VERSION}-slim
LABEL org.opencontainers.image.url='https://matrix.org/docs/projects/server/synapse'
LABEL org.opencontainers.image.documentation='https://github.com/matrix-org/synapse/blob/master/docker/README.md'
LABEL org.opencontainers.image.source='https://github.com/matrix-org/synapse.git'
LABEL org.opencontainers.image.licenses='Apache-2.0'
RUN \
--mount=type=cache,target=/var/cache/apt,sharing=locked \
--mount=type=cache,target=/var/lib/apt,sharing=locked \
apt-get update && apt-get install -y \
curl \
gosu \
libjpeg62-turbo \
libpq5 \
libwebp6 \
xmlsec1 \
libjemalloc2 \
libssl-dev \
openssl \
&& rm -rf /var/lib/apt/lists/*
COPY --from=builder /install /usr/local
COPY ./docker/start.py /start.py
COPY ./docker/conf /conf
EXPOSE 8008/tcp 8009/tcp 8448/tcp
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ENTRYPOINT ["/start.py"]
HEALTHCHECK --start-period=5s --interval=15s --timeout=5s \
CMD curl -fSs http://localhost:8008/health || exit 1