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ContainerizeDjangoApp.md

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#Create Djanso Docker Image

Build the docker image

We first need a docker image which has all modules we need, we also need copy our source code to the docker image to make our django app working.

Create django Dockerfile:

FROM python:3.8-slim
ENV PROJECT_ROOT /code
WORKDIR $PROJECT_ROOT
COPY code/ $PROJECT_ROOT
RUN pip install django
CMD ["python", "manage.py","runserver","0.0.0.0:8000"]
  1. python:3.8-slim is relatively small, happy with this python base image.
  2. the best way to install python modules is with a requirement.text file by doning RUN pip install -r requirements.txt

Navigate to your project folder, where is the Dockerfile, build the image with following command: NOTE: if you have minikube install, type in eval $(minikube docker-env) in the terminal. NOTE: Open locallibrary/settings.py find ALLOWED_HOSTS = [] replace with ALLOWED_HOSTS = ['*']

# leo-django is the image name in my project, hostname is lowercase
docker build -t ${HOSTNAME}/leo-django:v1 .

With the image tag, leave it for now, as we plan to put it in our minikube, rather than docker hub, we will use local repo.

Test if the docker image is working or not with the following command

docker run -itd -p 8000:8000 ${HOSTNAME}/leo-django:v1

If found Unable to find image '${yourHostname}/leo-django:v1' locally when run the about command, then please open another terminal, and try it again.

With eval $(minikube docker-env), you may not able to reach you webApp.

These caused by eval $(minikube docker-env), then solution is you can find the image ID, and run docker run -itd -p 8000:8000 ${imageID}/leo-django:v1.