5. Triển khai ứng dụng demo với persistence volume và public app qua ingress controller

#Add repo ingress-nginx
helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx 
helm repo update ingress-nginx

#Install ingress nginx
helm install ingress-nginx ingress-nginx/ingress-nginx \
		--namespace ingress-nginx \
		--set controller.service.appProtocol=false \
		--create-namespace

kubectl get all -n ingress-nginx

demoapp 
├── 01-demoapp-namespace.yaml
├── 02-demoapp-pvc.yaml
├── 03-demoapp-deployment.yaml
├── 04-demoapp-service.yaml
└── 05-demoapp-ingress.yaml

apiVersion: v1
kind: Namespace
metadata:
  name: demoapp

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: demoapp-pvc
  namespace: demoapp
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  storageClassName: default-storage-class-1 #adjust to use your storage class

apiVersion: apps/v1
kind: Deployment
metadata:
  name: demoapp
  namespace: demoapp
spec:
  replicas: 3
  selector:
    matchLabels:
      app: demoapp
  template:
    metadata:
      labels:
        app: demoapp
    spec:
      containers:
      - name: demoapp
        image: paulbouwer/hello-kubernetes:1.8
        ports:
        - containerPort: 8080
        volumeMounts:
        - mountPath: /data
          name: demoapp-storage
      volumes:
      - name: demoapp-storage
        persistentVolumeClaim:
          claimName: demoapp-pvc

apiVersion: v1
kind: Service
metadata:
  name: demoapp
  namespace: demoapp
spec:
  type: ClusterIP
  ports:
  - port: 80
    targetPort: 8080
  selector:
    app: demoapp

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: demoapp-ingress
  namespace: demoapp
spec:
  ingressClassName: nginx
  rules:
  - host: demoapp.cloud.net.vn #adjust to use your domain
    http:
      paths:
      - backend:
          service:
            name: demoapp
            port:
              number: 80
        path: /
        pathType: Prefix

cd demoapp
kubectl apply -f .

Name: <ingress-host>
Address: 42.113.xx.xx  (EXTERNAL-IP của ingress nginx)