Service_Lab.md

Nginx Deployment

nginx-deployment.yaml:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:latest
        ports:
        - containerPort: 80

Apply the deployment with:

kubectl apply -f nginx-deployment.yaml

Nginx ClusterIP Service

nginx-service-clusterip.yaml:

apiVersion: v1
kind: Service
metadata:
  name: nginx-service-clusterip
spec:
  selector:
    app: nginx
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80

Apply the ClusterIP service with:

kubectl apply -f nginx-service-clusterip.yaml

Nginx NodePort Service

nginx-service-nodeport.yaml:

apiVersion: v1
kind: Service
metadata:
  name: nginx-service-nodeport
spec:
  selector:
    app: nginx
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80
  type: NodePort

Apply the NodePort service with:

kubectl apply -f nginx-service-nodeport.yaml

After applying these configurations, you'll have a Nginx Deployment with three replicas, and two Services: one using ClusterIP and the other using NodePort.

• The ClusterIP Service allows internal communication within the cluster. You can access the Nginx service using its ClusterIP.

• The NodePort Service exposes the Nginx service on a port on each node, making it accessible externally. You can use the NodePort and the IP of any node to access the Nginx service from outside the cluster.

YAML example for the NodePort Service with the explicit specification of the NodePort:

nginx-service-nodeport.yaml:

apiVersion: v1
kind: Service
metadata:
  name: nginx-service-nodeport
spec:
  selector:
    app: nginx
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80
  type: NodePort
  nodePort: 30080   # Specify the NodePort value, adjust as needed