Flask application to deploy the zero downtime app on the cluster

Before getting started, ensure you have the following installed:

• Docker
• kubectl utility

Follow these steps to run the Flask application locally using Docker:

1. Clone the Repository:

   git clone <repository-url>
   cd <repository-folder>
   

2. Build Docker for you application:

• Build a Dockerfile for you app
• Build docker image

docker build -t <image_name>:<tag_name> .

3. Config changes:

• Replace the image name in the app deployment resource. (This should ideally be more modularised. You should be able to give all info to terraform in the config file.)
• MySql Connections: # Replace these fields from terraform/db/main.tf config resource This should ideally be more modularised. You should be able to give all info to terraform in the config file.
• Push it to a repository like DockerHub (push it to minikube in case of local cluster)

4. Run terraform code to deploy app, its corresponding db, prometheus and fluentd:

    terraform plan
    terraform apply

   You can run kubectl commands to check that all service, deployment, pods, ingress are running as expected.

1. I have also created terraform code to deploy Jenkins.
2. This is a basic module. A lot of necessary improvements on security practices and modularising can be done.
   • Storing the tfstate in S3.
   • Modularising tf code
   • Setting up non root for various application such as Docker, mysql etc.
   • Writing better and more test cases covering all tests.