How to Dockerize a Python App — with real job scenario/DevOps ticket

Docker and Deploy a Python Flask App to an App Server

Docker is a leading containerization technology that can help us package Python applications for easy deployment. By the end of this read, we should have successfully deployed a python app to an existing server.

Prerequisites

Before you begin, ensure you have the following prerequisites:

1. Access to App Server 2: You should have SSH access to App Server 2, where you intend to deploy your Docker container.
2. Docker Installed: Docker should be installed on App Server 2. You can follow the installation instructions on the Docker website.
3. Python App and Dependencies: You should have a Python application ready, and its dependencies listed in a requirements.txt file. These dependencies will be installed in the Docker container.

Objectives

The objectives of this guide are as follows:

1. Create a Dockerfile for your Python app.
2. Build a Docker image using the Dockerfile.
3. Create a Docker container from the image.
4. Map the container’s port to the host server’s port.
5. Test the Dockerized Python app on App Server 2.

Job Scenario