Kubernetes Autoscaling Concepts

External

• https://github.com/kubernetes/autoscaler/tree/master/cluster-autoscaler
• https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale/
• https://github.com/kubernetes/autoscaler/tree/master/vertical-pod-autoscaler

Internal

• Kubernetes Concepts

Horizontal Pod Autoscaling

Horizontal pod autoscaling is the automatic increasing or decreasing the number of pod replicas managed by a scalable higher-level controller. The scaling is performed by a horizontal controller.

Horizontal Pod Autoscaler

Vertical Pod Autoscaling

https://github.com/kubernetes/autoscaler/tree/master/vertical-pod-autoscaler

Vertical scaling of a pod mens increasing its containers' resource requests and limits. This can be currently done only at creation time, not while the pod is running.

TODO: https://medium.com/infrastructure-adventures/vertical-pod-autoscaler-deep-dive-limitations-and-real-world-examples-9195f8422724

Horizontal Node Autoscaling (Cluster Autoscaler)

https://github.com/kubernetes/autoscaler/tree/master/cluster-autoscaler