Efficient GitLab CI/CD with Python Flask: Step-by-Step Guide

Continuous Integration (CI) and Continuous Deployment (CD) are integral aspects of the software development process. When applied to Python Flask projects and utilizing GitLab CI/CD, you can automate the development, testing, and deployment of your web applications. In this article, we'll provide you with a specific step-by-step guide to deploy GitLab CI/CD for your Python Flask projects.

Step 1: Prepare Your Environment

Install Python and Flask: Ensure you have the latest versions of Python and Flask installed to develop Python Flask applications.

Create a GitLab Account: If you don't have one already, sign up for a GitLab account to get started.

Step 2: Create the .gitlab-ci.yml File

Create .gitlab-ci.yml File: In the root directory of your Python Flask project, create a .gitlab-ci.yml file.

Define Stages and Jobs: In the .gitlab-ci.yml file, define stages such as build, test, deploy, and configure corresponding jobs.

  - build
  - test
  - deploy

  stage: build
    - pip install -r requirements.txt

  stage: test
    - python -m unittest discover tests

  stage: deploy
    - scp -r app.py user@your-server:/path/to/your/project

Step 3: Activate CI/CD on GitLab

Connect Project to Repository: Log in to your GitLab account and create a new project. Connect the project to your repository.

Run the Initial CI/CD Pipeline: As you push code to the repository, GitLab CI/CD will automatically trigger. The CI/CD pipeline will run through stages and execute the defined jobs.

Step 4: Manage Deployment and Monitor Results

Manage Deployments: Ensure that all deployment tasks are automated. Utilize deployment management tools to minimize risks and streamline the deployment process.

Monitor CI/CD Results: Within the project interface on GitLab, you can view the history, timings, outcomes, and any errors of the CI/CD jobs.


Implementing GitLab CI/CD with Python Flask empowers you to automate the development and deployment process of web applications. Through this guide, you have learned how to create an effective CI/CD workflow and are equipped to develop high-quality Python Flask applications.