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Using "--no-cache-dir" flag in pip install ,make sure dowloaded packages by pip don't cached on system . This is a best practise which make sure to fetch ftom repo instead of using local cached one . Further , in case of Docker Containers , by restricing caching , we can reduce image size. In term of stats , it depends upon the number of python packages multiplied by their respective size . e.g for heavy packages with a lot of dependencies it reduce a lot by don't caching pip packages. Further , more detail information can be found at https://medium.com/sciforce/strategies-of-docker-images-optimization-2ca9cc5719b6 Signed-off-by: Pratik Raj <rajpratik71@gmail.com>
16 lines
700 B
Docker
16 lines
700 B
Docker
#
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# Dockerfile for scrapyd-onbuild (python3)
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#
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FROM vimagick/scrapyd:py3
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MAINTAINER EasyPi Software Foundation
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ONBUILD ADD ./*.txt /etc/scrapyd/
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ONBUILD RUN cd /etc/scrapyd; \
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[ -f packages.txt -o -f dependencies.txt ] && apt-get update; \
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[ -f packages.txt ] && xargs -r apt-get install -y < packages.txt; \
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[ -f dependencies.txt ] && xargs -r apt-get install -y < dependencies.txt; \
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[ -f requirements.txt ] && pip install --no-cache-dir -r requirements.txt; \
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[ -f dependencies.txt ] && xargs -r apt-get purge -y --auto-remove < dependencies.txt; \
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[ -f packages.txt -o -f dependencies.txt ] && rm -rf /var/lib/apt/lists/*
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