Dockerizing Flask application with CI/CD
Summary
The py-flask-ansible-docker repository is a project that demonstrates how to dockerize a Flask application, add nginx as a reverse proxy, and set up CI/CD pipelines using Ansible. The project has prerequisites such as Docker, Docker-compose, Ansible, Flask, and Virtualenv, and provides step-by-step instructions on how to build the application locally. The project uses Python for both frontend and backend and utilizes Ansible for infrastructure management. By adding nginx as a reverse proxy, the project ensures that the Flask application is accessible through a secure and scalable web server. The repository is useful for developers who want to learn how to containerize their Flask applications, add nginx as a reverse proxy, and automate their deployment using Ansible.
Prerequsite for local
- Docker
- Docker-compsoe
- Ansible
- Flask
- Virtualenv
Build Application Locally
$ git clone https://github.com/RupGautam/py-flask-ansible-docker.git
$ cd py-flask-ansible-docker
# Create python venv
$ python3 -m venv env
# Activate venv
$ source env/bin/activate
Installing pip requirements
$ pip install pip --upgrade
$ pip install -r app/requirements.txt
Running the application locally
$ FLASK_APP=app.py
$ gunicorn -w 2 -b :8000 app:app
You should be able to access webpage localhost:8000
Build Application for Docker
# Make sure you have installed docker and docker-compose
$ docker-compose up -d --build
or
$ docker build <image-name>:<v1> .
$ docker run -d -p 80:80 -p 8000:8000 <image-name>:<v1>
Deploying Application with Ansible
# Make sure you have install anisble and ansible-playbook
$ vi ansible/hosts
# Make necessary change for your inventories
$ cd ansible
$ ansible-playbook site.yml
Once ansible-playbook is finished; you should be able to acess your application