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0 pointsrahen3y ago0 comments

When you do a "kubectl get hpa", the 0% and 100% rules are set according to the CPU request and limit. The current usage will be set to "<unknown>" if either is missing, and the deployment won't autoscale.

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dilyevsky3y ago

Again this is not correct - limits are not factored in at all. Even if you do set them it's important to understand this in case overcommit is setup. Here's the relevant offical documentation:

> For per-pod resource metrics (like CPU), the controller fetches the metrics from the resource metrics API for each Pod targeted by the HorizontalPodAutoscaler. Then, if a target utilization value is set, the controller calculates the utilization value as a percentage of the equivalent resource request on the containers in each Pod.

> ...

> Please note that if some of the Pod's containers do not have the relevant resource request set, CPU utilization for the Pod will not be defined and the autoscaler will not take any action for that metric.

https://kubernetes.io/docs/tasks/run-application/horizontal-...

Edit: here's the code: https://github.com/kubernetes/kubernetes/blob/3ffdfbe286ebce...

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