Create horizontal-pod-autoscaler.yml

horizontal-pod-autoscaler.yml

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+---
+apiVersion: autoscaling/v2beta1
+kind: HorizontalPodAutoscaler
+metadata:
+  name: hpadeploymentautoscaler
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: hpadeployment
+  minReplicas: 2
+  maxReplicas: 5
+  metrics:
+    - resource:
+        name: cpu
+        targetAverageUtilization: 100
+      type: Resource
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: hpaclusterservice
+  labels:
+    name: hpaservice
+spec:
+  ports:
+    - port: 80
+      targetPort: 80
+  selector:
+    name: hpapod
+  type: ClusterIP
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: hpadeployment
+  labels:
+    name: hpadeployment
+spec:
+  replicas: 2
+  selector:
+    matchLabels:
+      name: hpapod
+  template:
+    metadata:
+      labels:
+        name: hpapod
+    spec:
+      containers:
+        - name: hpacontainer
+          image: k8s.gcr.io/hpa-example
+          ports:
+          - name: http
+            containerPort: 80
+          resources:
+            requests:
+              cpu: "200m"
+              memory: "64Mi"
+            limits: 
+              cpu: "100m"
+              memory: "256Mi"
+			  
+# ==== Execute below commonds to increase load====
+
+#Now, we will see how the autoscaler reacts to increased load. We will start a container, and send an infinite loop of queries to the php-apache service (please run it in a different   terminal):
+# Create A Temp Pod in interactive mod to access app using service name
+# kubectl run -i --tty load-generator --rm  --image=busybox /bin/sh
+# Execute below commond in Temp Pod
+# while true; do wget -q -O- http://hpaclusterservice; done