Kubernetes Multi-Environment Setup

This repository provides a complete Kubernetes setup with three separate environments: Testing, Staging, and Production. It includes Ingress rules, RBAC, deployments, autoscaling, TLS certificates, and persistent storage using Minikube and kubectl.

Features

• Three namespaces: testing, staging, and production
• RBAC setup: Admin user (full permissions) and Dev user (no permissions initially)
• Ingress controller: NGINX Ingress with routing rules
• Deployments: One node running three pods, each with a single container
• Autoscaling: Horizontal Pod Autoscaler enabled
• TLS security: Certificates configured with cert-manager
• Persistent Storage: Local PersistentVolumes (PVs) and PersistentVolumeClaims (PVCs)

Setup Instructions

1. Start Minikube

minikube start --memory=4g --cpus=2

Check status:

minikube status

2. Create Namespaces

kubectl create namespace testing
kubectl create namespace staging
kubectl create namespace production

3. Configure RBAC

Admin User (Full Permissions)

kubectl apply -f rbac-admin.yaml

Dev User (No Permissions Initially)

kubectl apply -f rbac-dev.yaml

4. Enable Ingress Controller

minikube addons enable ingress

Create an Ingress rule:

kubectl apply -f ingress.yaml

Update /etc/hosts:

echo "$(minikube ip) myapp.local" | sudo tee -a /etc/hosts

5. Deploy Applications

kubectl apply -f deployment.yaml

6. Enable Horizontal Pod Autoscaling

kubectl autoscale deployment myapp --cpu-percent=50 --min=1 --max=5 -n staging

Check autoscaler:

kubectl get hpa -n staging

7. Configure Persistent Storage

kubectl apply -f pv.yaml
kubectl apply -f pvc.yaml -n staging

8. Install TLS Certificates

Install cert-manager:

kubectl apply -f https://github.com/jetstack/cert-manager/releases/latest/download/cert-manager.yaml

Create a self-signed certificate:

kubectl apply -f tls-secret.yaml -n staging

Monitoring & Debugging

Check pods and deployments:

kubectl get pods -n staging -w
kubectl get deployments -n staging

Check logs:

kubectl logs -f deployment/myapp -n staging

Forward ports:

kubectl port-forward svc/myapp-service 8080:80 -n staging

Next Steps

• Expand configurations for production and testing environments.
• Integrate Helm charts for better management.
• Add CI/CD automation.

This setup provides a solid Kubernetes infrastructure for multi-environment development. 🚀