Artificial Intelligence(AI) and Machine Learning(ML) are literally on fire these days. Powering a wide spectrum of use-cases ranging from self-driving cars to drug discovery and to God knows what. AI and ML have a bright and thriving future ahead of them.
On the other hand, Docker revolutionized the computing world through the introduction of ephemeral lightweight containers. Containers basically package all the software required to run inside an image(a bunch of readonly layers) with a COW(Copy on Write) layer to persist the data.
Enough talk let's get started with building a Python data science container.
Our Python data science container makes use of the following super cool python packages:
Python is fast becoming the go-to language for data scientists and for this reason we are going to use Python as the language of choice for building our data science container.
Alpine Linux is a tiny Linux distribution designed for power users who appreciate security, simplicity and resource efficiency.
As claimed by Alpine:
The Alpine image is surprisingly tiny with a size of no more than 8MB for containers. With minimal packages installed to reduce the attack surface on the underlying container. This makes Alpine an image of choice for our data science container.
Downloading and Running an Alpine Linux container is as simple as:
$ docker container run --rm alpine:latest cat /etc/os-release
In our, Dockerfile we can simply use the Alpine base image as:
FROM alpine:latest
Now let's work our way through the Dockerfile.
FROM alpine:latestLABEL MAINTAINER=“Faizan Bashir <faizan.ibn.bashir@gmail.com>”
Linking of locale.h as xlocale.h
This is done to ensure successfull install of python numpy package
see https://forum.alpinelinux.org/comment/690#comment-690 for more information.
WORKDIR /var/www/
SOFTWARE PACKAGES
* musl: standard C library
* lib6-compat: compatibility libraries for glibc
* linux-headers: commonly needed, and an unusual package name from Alpine.
* build-base: used so we include the basic development packages (gcc)
* bash: so we can access /bin/bash
* git: to ease up clones of repos
* ca-certificates: for SSL verification during Pip and easy_install
* freetype: library used to render text onto bitmaps, and provides support font-related operations
* libgfortran: contains a Fortran shared library, needed to run Fortran
* libgcc: contains shared code that would be inefficient to duplicate every time as well as auxiliary helper routines and runtime support
* libstdc++: The GNU Standard C++ Library. This package contains an additional runtime library for C++ programs built with the GNU compiler
* openblas: open source implementation of the BLAS(Basic Linear Algebra Subprograms) API with many hand-crafted optimizations for specific processor types
* tcl: scripting language
* tk: GUI toolkit for the Tcl scripting language
* libssl1.0: SSL shared libraries
ENV PACKAGES="
dumb-init
musl
libc6-compat
linux-headers
build-base
bash
git
ca-certificates
freetype
libgfortran
libgcc
libstdc++
openblas
tcl
tk
libssl1.0
"PYTHON DATA SCIENCE PACKAGES
* numpy: support for large, multi-dimensional arrays and matrices
* matplotlib: plotting library for Python and its numerical mathematics extension NumPy.
* scipy: library used for scientific computing and technical computing
* scikit-learn: machine learning library integrates with NumPy and SciPy
* pandas: library providing high-performance, easy-to-use data structures and data analysis tools
* nltk: suite of libraries and programs for symbolic and statistical natural language processing for English
ENV PYTHON_PACKAGES="
numpy
matplotlib
scipy
scikit-learn
pandas
nltk
"RUN apk add --no-cache --virtual build-dependencies python --update py-pip
&& apk add --virtual build-runtime
build-base python-dev openblas-dev freetype-dev pkgconfig gfortran
&& ln -s /usr/include/locale.h /usr/include/xlocale.h
&& pip install --upgrade pip
&& pip install --no-cache-dir $PYTHON_PACKAGES
&& apk del build-runtime
&& apk add --no-cache --virtual build-dependencies $PACKAGES
&& rm -rf /var/cache/apk/*CMD [“python”]
The FROM directive is used to set alpine:latest as the base image. Using the WORKDIR directive we set the /var/www as the working directory for our container. The ENV PACKAGES lists the software packages required for our container like git, blas and libgfortran. The python packages for our data science container are defined in the ENV PACKAGES.
We have combined all the commands under a single Dockerfile RUNdirective to reduce the number of layers which in turn helps in reducing the resultant image size.
Now that we have our Dockerfile defined, navigate to the folder with the Dockerfile using the terminal and build the image using the following command:
$ docker build -t faizanbashir/python-datascience:2.7 -f Dockerfile .
The -t flag is used to name a tag in the ‘name:tag’ format. The -f tag is used to define the name of the Dockerfile (Default is ‘PATH/Dockerfile’).
We have successfully built and tagged the docker image, now we can run the container using the following command:
$ docker container run --rm -it faizanbashir/python-datascience:2.7 python
Voila, we are greeted by the sight of a python shell ready to perform all kinds of cool data science stuff.
Python 2.7.15 (default, Aug 16 2018, 14:17:09)
[GCC 6.4.0] on linux2
Type “help”, “copyright”, “credits” or “license” for more information.
>>>
Our container comes with Python 2.7, but don’t be sad if you wanna work with Python 3.6. Lo, behold the Dockerfile for Python 3.6:
FROM alpine:latestLABEL MAINTAINER=“Faizan Bashir <faizan.ibn.bashir@gmail.com>”
Linking of locale.h as xlocale.h
This is done to ensure successfull install of python numpy package
see https://forum.alpinelinux.org/comment/690#comment-690 for more information.
WORKDIR /var/www/
SOFTWARE PACKAGES
* musl: standard C library
* lib6-compat: compatibility libraries for glibc
* linux-headers: commonly needed, and an unusual package name from Alpine.
* build-base: used so we include the basic development packages (gcc)
* bash: so we can access /bin/bash
* git: to ease up clones of repos
* ca-certificates: for SSL verification during Pip and easy_install
* freetype: library used to render text onto bitmaps, and provides support font-related operations
* libgfortran: contains a Fortran shared library, needed to run Fortran
* libgcc: contains shared code that would be inefficient to duplicate every time as well as auxiliary helper routines and runtime support
* libstdc++: The GNU Standard C++ Library. This package contains an additional runtime library for C++ programs built with the GNU compiler
* openblas: open source implementation of the BLAS(Basic Linear Algebra Subprograms) API with many hand-crafted optimizations for specific processor types
* tcl: scripting language
* tk: GUI toolkit for the Tcl scripting language
* libssl1.0: SSL shared libraries
ENV PACKAGES="
dumb-init
musl
libc6-compat
linux-headers
build-base
bash
git
ca-certificates
freetype
libgfortran
libgcc
libstdc++
openblas
tcl
tk
libssl1.0
"PYTHON DATA SCIENCE PACKAGES
* numpy: support for large, multi-dimensional arrays and matrices
* matplotlib: plotting library for Python and its numerical mathematics extension NumPy.
* scipy: library used for scientific computing and technical computing
* scikit-learn: machine learning library integrates with NumPy and SciPy
* pandas: library providing high-performance, easy-to-use data structures and data analysis tools
* nltk: suite of libraries and programs for symbolic and statistical natural language processing for English
ENV PYTHON_PACKAGES="
numpy
matplotlib
scipy
scikit-learn
pandas
nltk
"RUN apk add --no-cache --virtual build-dependencies python3
&& apk add --virtual build-runtime
build-base python3-dev openblas-dev freetype-dev pkgconfig gfortran
&& ln -s /usr/include/locale.h /usr/include/xlocale.h
&& python3 -m ensurepip
&& rm -r /usr/lib/python*/ensurepip
&& pip3 install --upgrade pip setuptools
&& ln -sf /usr/bin/python3 /usr/bin/python
&& ln -sf pip3 /usr/bin/pip
&& rm -r /root/.cache
&& pip install --no-cache-dir $PYTHON_PACKAGES
&& apk del build-runtime
&& apk add --no-cache --virtual build-dependencies $PACKAGES
&& rm -rf /var/cache/apk/*CMD [“python3”]
Build and tag the image like so:
$ docker build -t faizanbashir/python-datascience:3.6 -f Dockerfile .
Run the container like so:
$ docker container run --rm -it faizanbashir/python-datascience:3.6 python
With this, you have a ready to use container for doing all kinds of cool data science stuff.
Figures, you have the time and resources to set up all this stuff. In case you don’t, you can pull the existing images that I have already built and pushed to Docker’s registry Docker Hub using:
# For Python 2.7 pull
$ docker pull faizanbashir/python-datascience:2.7For Python 3.6 pull
$ docker pull faizanbashir/python-datascience:3.6
After pulling the images you can use the image and extend in your Dockerfile file or use as image in your docker-compose or stack file.
The world of AI, ML is getting pretty exciting these days and will continue to become even more exciting. Big players are investing heavily in these domains. About time you start harness the power of data, who knows it might lead to something wonderful.
#python #docker #data-science