Autoscaling

DOCS

Need metrics server to be installed on cluster.

kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml

Horizontal Pod Autoscaler (HPA)

Horizontal Scaling means modifying the compute resources of an existing cluster, for example, by adding new nodes to it or by adding new pods by increasing the replica count of pods (Horizontal Pod Autoscaler).

Vertical Pod Autoscaler (VPA) - ONLY LOCALLY -> DONT USE ON PRODUCTION / STAGE

Vertical Scaling means to modify the attributed resources (like CPU or RAM) of each node in the cluster. In most cases, this means creating an entirely new node pool using machines that have different hardware configurations. Vertical scaling on pods means dynamically adjusting the resource requests and limits based on the current application requirements (Vertical Pod Autoscaler).

• Pods will go up or down in size (after restart!)
• Used in dev to determine optimal CPU and memory for the Pod
• VPA should not be used with HPA