Using an HPA object to autoscale a deployment based on it's Pods CPU metrics

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On Kubernetes, scaling an application is just a matter of defining how many replicas we want:

$ kubectl scale deployment/demo --replicas=5
deployment.apps/demo scaled

Having to manually adjust the number of replicas is not really practical. Here's where the HorizontalPodAutoscaler (HPA) comes into play

01/07/2021