I'm looking to update manually with the command kubectl autoscale my maximum number of replicas for auto scaling.
however each time I run the command it creates a new hpa that fails to launch the pod why I don't know at all:(
Do you have an idea how i can update manually with kubectl my HPA ?
https://gist.github.com/zyriuse75/e75a75dc447eeef9e8530f974b19c28a
I think you are mixing two topics here, one is manually scale a pod (you can do it through a deployment applying kubectl scale deploy {mydeploy} --replicas={#repl}). In the other hand you have HPA (Horizontal Pod AutoScaler), in order to do this (HPA) you should have configured any app metrics provider system e.g:
metrics server https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/metrics-server
heapster (deprecated) https://github.com/kubernetes-retired/heapster
then you can create a HPA to handle your autoscaling, you can get more info on this link https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale-walkthrough/
Once created you can patch your HPA or deleted it and create it again
kubectl delete hpa hpa-pod -n ns-svc-cas
kubectl autoscale hpa-pod --min={#number} --max={#number} -n ns-svc-cas
easiest way