deploy.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: flask-deploy
spec:
  selector:
    matchLabels:
      app: flask
  replicas: 2
  template:
    metadata:
      labels:
        app: flask
    spec:
      containers:
      - name: flask
        image: tiangolo/uwsgi-nginx-flask:python3.7
        ports:
        - containerPort: 80

Service.yaml

apiVersion: v1
kind: Service
metadata:
  name: flask-svc
spec:
  type: NodePort
  selector:
    app: flask
  ports:
  - port: 80
    targetPort: 80
    protocol: TCP

Ingress.yaml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: flask-ingress
  annotations:
    kubernetes.io/ingress.class: alb
    alb.ingress.kubernetes.io/scheme: internet-facing
    alb.ingress.kubernetes.io/target-type: instance
spec:
  defaultBackend:
    service:
      name: flask-svc
      port:
        number: 80