Python application deployment in Kubernetes with Jenkins CI/CD pipeline

1. Creating a sample Python Flask application

We’ll start by creating a simple application. The provided Python code defines a basic Flask web application with a single route (“/”) that returns the string “Hello from the Python Flask App!” when accessed, and it runs the application on host ‘0.0.0.0’ and port 5000 when executed directly....

2. Creating a Docker image

We will create a Dockerfile to package the Flask application into Docker image....

3. Defining Kubernetes Deployment YAML File

The deployment YAML file specifies the desired state of the application, including the number of replicas, container image, and other configurations....

4. Creating Jenkins Role YAML File (Optional)

If Jenkins needs permission to interact with Kubernetes resources, you can create a Kubernetes role YAML file to define the required permissions....

5. Creating a Service Account in Kubernetes

Start the minikube....

6. Generating Token using OpenSSl and setting it for the service account

This command generates a random 32-byte token encoded in base64. Copy the generated token as we need it in the next step....

7. Finding the URL and port of the Minikube cluster

The minikube dashboard –url command is used to retrieve the URL of the Kubernetes dashboard running on your Minikube cluster....

8. Configuring Jenkins

Install Jenkins LTS version for your Operating System and complete the on screen setup. On new browser tab visit http://localhost:8080/...

9. Creating Jenkins Pipeline

On Dashboard click on New Item. Enter the item name, example myapp, and select Pipeline Option....

Python application deployment in Kubernetes with Jenkins CI/CD pipeline – FAQ’s

How do I deploy an application in Kubernetes using Jenkins?...