Deployments with YAML

Step-01: Create Deployment

• Create Deployment

kubectl apply -f deployment-definition.yml
kubectl get deploy
kubectl get rs
kubectl get po

• deployment-definition.yml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: myapp-deployment
  labels:
    app: myapp 
spec:
  replicas: 3
  selector:
    matchLabels:
      app: myapp
  template:
    metadata:
      name: myapp-pod
      labels:
        app: myapp
    spec:
      containers:
      - name: myapp
        image: stacksimplify/kubenginx:2.0.0
        ports:
          - containerPort: 80

Step-02: Update container image to 3.0.0

• Update image version from stacksimplify/kubenginx:2.0.0 to stacksimplify/kubenginx:3.0.0

kubectl apply -f deployment-definition.yml
kubectl get deploy
kubectl get rs
kubectl get po

• deployment-definition.yml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: myapp-deployment
  labels:
    app: myapp 
spec:
  replicas: 3
  selector:
    matchLabels:
      app: myapp
  template:
    metadata:
      name: myapp-pod
      labels:
        app: myapp
    spec:
      containers:
      - name: myapp
        image: stacksimplify/kubenginx:3.0.0
        ports:
          - containerPort: 80