21-ROLLING-UPDATES-AND-ROLLBACKS.md

How to create kubectl alias (optional):

• alias k=kubectl

Deployment Strategys:

• Recreate
• Rolling Update (Default)

Commands:

• k apply -f deployment.yml
• k get deployments
• k set image deployment/nginx-deploy nginx=nginx:1.9.1
• k rollout status deployment/nginx-deploy
• k rollout undo deployment/nginx-deploy
• k rollout history deployment/nginx-deploy

Deployment example:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deploy
  labels:
    app: app1
spec:
  replicas: 2
  selector:
    matchLabels:
      app: app1
  template:
    metadata:
      labels:
        app: app1
    spec:    
      containers:
      - image: nginx:1.9.0
        name: nginx