Kubernetes Horizontal Pod Autoscaler
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External
- https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale/
- https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale-walkthrough/
- https://towardsdatascience.com/kubernetes-hpa-with-custom-metrics-from-prometheus-9ffc201991e
- https://github.com/kubernetes/community/blob/master/contributors/design-proposals/instrumentation/custom-metrics-api.md
Internal
Overview
A pre-requisite, if we intend the autoscaler to monitor resource metrics, a source of resource metrics must be deployed. The simplest source of resource metrics is the metrics server.
The horizontal pod autoscalers works with a previously deployed higher level controller that supports scaling (deployments, replica sets, stateful sets).