Horizontal Pod autoscaling

HorizontalPodAutoscaler is a Kubernetes resource that helps you to update the replicas within your ReplicaSet resources based on defined factors, the most common being CPU and memory.

To understand this better, let's create an nginx deployment, and this time we will set the resource limits within the Pod. Resource limits are a vital element that enable HorizontalPodAutoscaler resource to function. It relies on the percentage utilization of the limits to decide when to spin up a new replica. We will use the following nginx-autoscale-deployment.yaml manifest for this exercise:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx
  labels:
    app: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
  &...