Overview:

Cluster Autoscaling automatically adjusts the number of worker nodes in a cluster to handle workload demands.

Prerequisites:

• Use a cloud provider that supports Cluster Autoscaling (e.g., AWS, GCP, Azure).

Steps to Enable Cluster Autoscaling:

1. Set Node Pool Configurations:

   • Define minimum and maximum node counts in the cloud provider’s Kubernetes configuration.

2. Install and Configure Cluster Autoscaler:

   helm repo add autoscaler https://kubernetes.github.io/autoscaler
   helm install cluster-autoscaler autoscaler/cluster-autoscaler 
     --namespace kube-system 
     --set cloudProvider=aws 
     --set awsRegion=<region>

3. Annotate Nodes:

   • Add labels to node groups to support autoscaling:

     kubectl annotate node <node-name> cluster-autoscaler.kubernetes.io/safe-to-evict=true

Activity:

Enable Cluster Autoscaling in a cloud-based Kubernetes cluster and test by increasing workload demands.