master-backend.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: backend
spec:
  replicas: 2
  selector:
    matchLabels:
      app: backend
  template:
    metadata:
      labels:
        app: backend
    spec:
      affinity:
        podAntiAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
            - weight: 100
              podAffinityTerm:
                labelSelector:
                  matchExpressions:
                    - key: app
                      operator: In
                      values:
                        - backend
                topologyKey: kubernetes.io/hostname
      containers:
        - name: backend
          image: jalayrupera13/kvstore-app:latest
          envFrom:
          - secretRef:
              name: etcd-secret
          imagePullPolicy: Always
          resources:
            limits:
              memory: "512Mi"
              cpu: "100m"
            requests:
              memory: "512Mi"
              cpu: "100m"
          livenessProbe:
            httpGet:
              path: /docs
              port: 80
            periodSeconds: 10
            initialDelaySeconds: 5
---
apiVersion: v1
kind: Service
metadata:
  name: backend
spec:
  selector:
    app: backend
  ports:
    - protocol: TCP
      port: 8000
      targetPort: 80
  type: LoadBalancer
---
apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: backend
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: backend
  minReplicas: 1
  maxReplicas: 10
  metrics:
  - resource:
      name: cpu
      target:
        averageUtilization: 80
        type: Utilization
    type: Resource
  - resource:
      name: memory
      target:
        averageUtilization: 90
        type: Utilization
    type: Resource