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Auto-Scaling in Kubernetes

Kubernetes supports three main types of scaling:

  • Horizontal Pod Autoscaler (HPA): Scales pods based on CPU/memory.
  • Vertical Pod Autoscaler (VPA): Adjusts resource requests/limits of pods.
  • Cluster Autoscaler: Adds/removes nodes based on pod needs.

HPA Example:

kubectl autoscale deployment my-deployment \
  --cpu-percent=50 \
  --min=1 \
  --max=10

Enable Cluster Autoscaler (EKS Example):

apiVersion: apps/v1
kind: Deployment
metadata:
  name: cluster-autoscaler
spec:
  template:
    spec:
      containers:
      - image: k8s.gcr.io/autoscaling/cluster-autoscaler:v1.20.0
        name: cluster-autoscaler
        command:
        - ./cluster-autoscaler
        - --cloud-provider=aws
        - --nodes=1:10:node-group-name
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