Container size matters – Optimize the size of your Python/Django Containers

In one of my recent videos I've disussed the size of the Django/Python Docker Containers and how to decrease it:

I failed to successfully create an image based on alpine, which is known to be very slim. With the help of Aaron Goodrich, who posted a comment with a Dockerfile for alpine, I was able to finally create such an image 🙂 Thanks for the help!

Without further ado, here are the results (and the respective Dockerfiles).

Please note that I have slightly changed the Dockerfile compared to the video above.

Based on Python 3.5 Jessie: 740 MB

FROM python:3.5-jessie

COPY ./app /app
WORKDIR /app

RUN pip install --no-cache-dir -r requirements/dev.txt

Based on Python 3.5 Slim: 188 MB

FROM python:3.5-slim

COPY ./app /app
WORKDIR /app

RUN pip install --no-cache-dir -r requirements/dev.txt

Based on Python 3.5 with Alpine: 248 MB

FROM python:3.5-alpine

COPY ./app /app
WORKDIR /app

RUN apk add --update --no-cache postgresql-client && \
    apk add --update --no-cache --virtual .temp-build-deps gcc libc-dev linux-headers postgresql-dev

RUN pip install --no-cache-dir -r requirements/dev.txt

RUN apk del .temp-build-deps gcc libc-dev linux-headers postgresql-dev

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