Analysis of the process of deploying Python applications in Docker containers

Simple application deployment

1. Directory structure:

└── Pythonpro #Directory└── test.py #File└── requirements.txt #File└── Dockerfile #File

2. Write the Dockerfile file

# Based on the image
FROM python:3.6.4
# Create a code folder working directory/code
RUN mkdir /code
#Copy the current code file to the container/code
COPY ./code
# Install required packages
RUN pip install -r /code/requirements.txt -i https://pypi.douban.com/simple
# Specify the working directory of cmd/code
WORKDIR /code
#Commands executed when the container starts
CMD ["python","test.py"]

3. Create a container image

docker build -t test .

4. Run the container

docker run -it --name test --restart always --privileged=true python-test
--name: specifies the name of the container as python-test, where test is the image just built.

--restart: always The container is always restarted when it exits.

--privileged=true: The permissions required to execute files in the container.

Django application containerization

1. Directory structure, I assume that this directory exists in /home/Pythonpro.

└── Pythonpro #Directory└── manage.py #File└── Main Project #Directory└── apps #Directory└── requirements.txt #File└── Dockerfile #File└── run.sh #File

run.sh script

python /code/manage.py runserver 0.0.0.0:8000

2. Write the Dockerfile file

FROM python:3.6.4
RUN mkdir /code \
&&apt-get update \
&&apt-get -y install freetds-dev \
&&apt-get -y install unixodbc-dev
COPY ./code 
RUN pip install -r /code/requirements.txt -i https://pypi.douban.com/simple
WORKDIR /code
CMD ["/bin/bash","run.sh"]

3. Build an Image

docker build -t webtest .

4. Run the container

docker run -it -p 6500:8000 -v /home/Pythonpro:/code --name web --restart always --privileged=true webtest

-p: Map the container's port 8000 to the host's port 6500

-v: The host directory /home/Pythonprot is mapped to the container directory /code

--name: specifies the name of the container as web, the image just built by webtest

--restart: always The container is always restarted when it exits

--privileged=true: Permissions required to execute files in the container

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