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API Version

  • API is versioned
  • Provide stability for existing implementations
  • Enable forward change
  • Alpha -> Beta -> Stable
  • No direct relation to release versions

Evolution of an API version api-version

Commands​

#Get the list of the API resources
kubectl api-resources
#Filter on a specific group
kubectl api-resources --api-group=apps

api-group-app

#Explain command get more information for a specific API Object
#Check out KIND and VERSION
#If VERSION = extensions/v1beta1, the API Group is deprecated
kubectl explain deployment | head
#Get the API Group in a specific version
kubectl explain deployment --api-version apps/v1 | head

api-version deployment

#Print the supported API versions on the API Server
kubectl api-versions | sort | more

Créer un fichier sur le serveur deployment.yaml et mettez ceci

apiVersion: apps/v1
kind: Deployment
metadata:
  name: hello-world
  labels:
    app: hello-world
spec:
  replicas: 4
  selector:
    matchLabels:
      app: hello-world
  template:
    metadata:
      labels:
        app: hello-world
    spec:
      containers:
      - name: hello-world
        image: gcr.io/google-samples/hello-app:1.0
        ports:
        - containerPort: 8080

Nous déployons le fichier

kubectl apply -f deployment.yaml
#Let observ the result
kubectl get deployments.apps hello-world -o yaml | head

La version du déploiement est "apps/v1"

api-version deployment

#Let's clean up after this demo
kubectl delete deployment hello-world