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I have Kubernetes cluster hosted in Google Cloud. I created a deployment and defined a hpa rule for it:
kubectl autoscale deployment my_deployment --min 6 --max 30 --cpu-percent 80
I want to run a command that editing the --min value, without remove and re-create a new hpa rule. Something like:
$ kubectl autoscale deployment my_deployment --min 1 --max 30
Error from server (AlreadyExists): horizontalpodautoscalers.autoscaling "my_deployment" already exists
Is this possible to edit hpa (min, max, cpu-percent, ...) on command line?
They are editable just as any other resource is, though either kubectl edit hpa $the_hpa_name for an interactive edit, or kubectl patch hpa $the_hpa_name -p '{"spec":{"minReplicas": 1}}' for doing so in a "batch" setting.
If you don't know the $the_hpa_name, you can get a list of them like any other resource: kubectl get hpa, and similarly you can view the current settings and status with kubectl get -o yaml hpa $the_hpa_name (or even omit $the_hpa_name to see them all, but that might be a lot of text, depending on your cluster setup).
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