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Dockerfile
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# Copyright 2020 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
FROM gcr.io/dataflow-templates-base/python3-template-launcher-base
ENV FLEX_TEMPLATE_PYTHON_REQUIREMENTS_FILE="/template/requirements.txt"
ENV FLEX_TEMPLATE_PYTHON_PY_FILE="/template/streaming_beam.py"
COPY . /template
# We could get rid of installing libffi-dev and git, or we could leave them.
RUN apt-get update \
&& apt-get install -y libffi-dev git \
&& rm -rf /var/lib/apt/lists/* \
# Upgrade pip and install the requirements.
&& pip install --no-cache-dir --upgrade pip \
&& pip install --no-cache-dir -r $FLEX_TEMPLATE_PYTHON_REQUIREMENTS_FILE \
# Download the requirements to speed up launching the Dataflow job.
&& pip download --no-cache-dir --dest /tmp/dataflow-requirements-cache -r $FLEX_TEMPLATE_PYTHON_REQUIREMENTS_FILE
# Since we already downloaded all the dependencies, there's no need to rebuild everything.
ENV PIP_NO_DEPS=True
ENTRYPOINT ["/opt/google/dataflow/python_template_launcher"]