CI/CD with Docker, Kubernetes and Ansible

This repository builds an Nginx image that serves index.html. When a tag is pushed, the docker-image-build-pipeline.yaml pipeline is triggered. It builds the Docker image, tags it, runs tests to check the container status, performs a curl request to check if the Nginx website is accessible, and finally pushes the versioned image to GitHub Container Registry.

Using Minikube you'll set up a cluster with nginx-deployment.yaml and nginx-svc.yaml. To update the cluster with a newer version you can run the deploy-playbook.yaml.

Prerequisites

Before running the application, ensure you have the following installed:

• Minikube
• Ansible
• Docker

Step-by-Step Guide

1. Start Minikube

Start a Minikube cluster if it is not already running:

minikube start

2. Deploy the Application

Run the following commands to apply the deployment and service:

kubectl apply -f nginx-deployment.yaml
kubectl apply -f nginx-svc.yaml

3. Verify the Application Status

Check if the pods are running:

kubectl get pods

Check if the service is up:

kubectl get svc

4. Access the Application

Access website with the following command:

minikube service frontend-service

5. Updating the Version

To update the website and roll out the changes to the cluster:

1. Make a change to the index.html file.
2. Commit and push the changes.
3. Tag the commit with a version number (the tag must start with v, e.g., v1.0.0).
4. Push the tag to trigger the pipeline.

Once the pipeline completes, the newly built image will be available here: https://github.com/Enkas1/devops3_examinering/pkgs/container/devops3_examinering

6. Running the Ansible Playbook

To deploy the newly pushed version, run the following command, replacing "v2.0.0" with your version:

ansible-playbook deploy-playbook.yaml -e new_version="v2.0.0"

7. Access the Application again or inspect Minikube Dashboard

minikube service frontend-service

minikube dashboard