Kubernetes Autoscaling Concepts

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Horizontal Pod Autoscaling

Horizontal pod autoscaling is the automatic increase or decrease the number of pod replicas managed by a scalable higher-level controller. The scaling is performed by a horizontal controller and it is controlled by a horizontal pod autoscaler Kubernetes API resource. More details:

Horizontal Pod Autoscaler

Vertical Pod Autoscaling

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.


Horizontal Node Autoscaling (Cluster Autoscaler)