Headline

apiVersion: apps/v1 kind: Deployment metadata:

name: nginx-deployment
labels:
  app: nginx
  app.kubernetes.io/name=nginx       # used 

spec:

replicas: 3
selector:          # field defines how the created ReplicaSet finds which Pods to manage. In this case, you select a label that is defined in the Pod template (app: nginx). 
  matchLabels:
    app: nginx
template:
  metadata:
    labels:
      app: nginx
  spec:
    containers:
    - name: nginx
      image: nginx:1.14.2
      ports:
      - containerPort: 80

— apiVersion: v1 kind: Service metadata:

name: my-service

spec:

selector:
  app.kubernetes.io/name: MyApp
ports:
  - protocol: TCP
    port: 80
    targetPort: 9376

</code>