// Aula 19 - ReplicaSets

https://kubernetes.io/docs/concepts/workloads/controllers/replicaset/ 

# basicreplica.yaml

apiVersion: apps/v1
kind: ReplicaSet
metadata:
  name: kuard
  labels:
    app: kuard
    version: "2"
spec:
  replicas: 1
  selector:
    matchLabels:
      app: kuard
  template:
    metadata:
      labels:
        app: kuard
        version: "2"
    spec:
      containers:
      - name: kuard
        image: gcr.io/kuar-demo/kuard-amd64:2

# kubectl apply -f basicreplica.yaml

# kubectl get pods

# kubectl describe rs kuard

# kubectl get pods -l app=kuard

# kubectl scale replicasets kuard --replicas=5

# kubectl get pods

# vim basicreplica.yaml

spec:
  replicas: 4

# kubectl apply -f basicreplica.yaml

# kubectl get pods

# kubectl autoscale rs kuard --min=2 --max=4 --cpu-percent=80

https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands#autoscale

# kubectl get hpa

# kubectl delete rs kuard

# kubectl get pods

# kubectl delete rs kuard --cascade=orphan