deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app.kubernetes.io/name: blue
  name: blue
  namespace: blue
spec:
  replicas: 1
  selector:
    matchLabels:
      app.kubernetes.io/name: blue
  template:
    metadata:
      labels:
        app.kubernetes.io/name: blue
    spec:
      containers:
      - image: gcr.io/kuar-demo/kuard-amd64:blue
        imagePullPolicy: IfNotPresent
        name: nginx
        ports:
        - containerPort: 8080
          name: http
          protocol: TCP
        resources:
          requests:
            cpu: 100m
            memory: 64Mi
          limits:
            memory: 64Mi
      topologySpreadConstraints:
        - topologyKey: topology.kubernetes.io/zone
          whenUnsatisfiable: ScheduleAnyway
          minDomains: 3
          maxSkew: 1
          labelSelector:
            matchLabels:
              app.kubernetes.io/name: blue
---
apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: blue
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: blue
  minReplicas: 3
  maxReplicas: 20
  metrics:
  - type: Resource
    resource:
      name: cpu
      target:
        type: Utilization
        averageUtilization: 75
  - type: Resource
    resource:
      name: memory
      target:
        type: Utilization
        averageUtilization: 75
---
apiVersion: policy/v1
kind: PodDisruptionBudget
metadata:
  name: blue
spec:
  # stateless
  maxUnavailable: 50%
  selector:
    matchLabels:
      app.kubernetes.io/name: blue