Deploy Django with Docker and PostgreSQL

Hey there,

there are a couple of ways to go about what you want. In the link you provided, it’s stated you can create a Docker file and then add a configuration file which configures the services for you.

What I would do is to create the following DockerFile :

# Use an official Python runtime as a parent image
FROM python:3.9-slim-buster

# Set the working directory to /app
WORKDIR /app

# Copy the requirements file into the container
COPY requirements.txt .

# Install any needed packages specified in requirements.txt
RUN pip install --no-cache-dir -r requirements.txt

# Set environment variables
ENV POSTGRES_USER=<your-postgres-username>
ENV POSTGRES_PASSWORD=<your-postgres-password>
ENV POSTGRES_DB=<your-postgres-db-name>
ENV DJANGO_SETTINGS_MODULE=<your-django-settings-module>

# Install PostgreSQL
RUN apt-get update && apt-get install -y postgresql postgresql-contrib

# Create the database
RUN service postgresql start && \
    su postgres -c "psql -c \"CREATE DATABASE ${POSTGRES_DB};\"" && \
    service postgresql stop

# Copy the Django project into the container
COPY . .

# Run Django migrations to create the necessary tables in the database
RUN python manage.py migrate

# Expose the default Django port
EXPOSE 8000

# Start the Django development server
CMD ["python", "manage.py", "runserver", "0.0.0.0:8000"]

In this Dockerfile, we start by using an official Python 3.9 slim image as the parent image. We then set the working directory to /app and copy the requirements.txt file into the container. The parent image is modified by adding a new code directory. The parent image is further modified by installing the Python requirements defined in the requirements.txt file.

Next, we set environment variables for the PostgreSQL username, password, database name, and Django settings module. We install PostgreSQL and create the database using the service command and the su command to run the PostgreSQL psql command as the postgres user.

We then copy the entire Django project into the container and run the migrate command to create the necessary tables in the database. We expose the default Django port 8000 and start the Django development server using the CMD instruction.

Note that you will need to modify this Dockerfile to match your specific Django and PostgreSQL configuration. For example, you will need to update the environment variables to match your PostgreSQL username, password, and database name, and update the CMD instruction to match the command used to start your Django server.

Having said that, if you plan to deploy these projects on DigitalOcean, I can suggest you to check the https://www.digitalocean.com/products/managed-databases-postgresql)[Managed Databased DigitalOcean] offers.

https://docs.digitalocean.com/products/databases/postgresql/

Basically, it manages the Database for you so that you don’t have to worry about anything.