Kubernetes·Kubernetes from first pod to production app

Scaling

Scale replicas manually and automatically based on real signals.

Intermediate 13 min read Lesson 8 of 300 Challenge included

What you will be able to do

Set resource requests before HPA.
Use HPA for variable traffic.
Scale on the right metric.
Keep stateless pods for easy scaling.

In plain English

Horizontal Pod Autoscaler adds replicas when CPU or custom metrics exceed targets. It needs resource requests to calculate utilisation. Scale on the signal that actually limits you, not just CPU.

terminalTerminal

kubectl autoscale deployment web --cpu-percent=60 --min=2 --max=10
kubectl get hpa
kubectl top pods

Your turn

Create an autoscaler

Medium

Write a command to autoscale web between 2 and 10 replicas at 60% CPU.

BASH · starter

kubectl autoscale

Check your understanding before moving on.

Knowledge checkQuestion 1

What does HPA need in order to scale on CPU?

Select an answer to continue

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