Question

Cannot get kubernetes Horizonal Pod Autoscaler or Metrics Server working

Posted on October 22, 2018
Kubernetes
Asked by sudermanjr

I am using the new hosted Kubernetes (which is pretty awesome, btw), however I cannot get HPA or Metrics to work at all.

I have deployed both heapster and metrics server just in case one was not supported, however on 1.11 I expect metrics server to work. At first, metrics server was not able to connect to the kubelet endpoint via dns (since the names don’t exist as DNS), so I reconfigured metrics-server to use these flags:

--kubelet-insecure-tls
--kubelet-preferred-address-types=InternalIP

This enabled the connection to kubelet and the errors are gone in the metrics server logs. Now I am seeing on the HPA:

unable to get metrics for resource cpu: unable to fetch metrics from resource metrics API: the server is currently
unable to handle the request (get pods.metrics.k8s.io)

This is where I get stuck currently. Any help is appreciated. Thanks!

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cbenhagen • December 10, 2018

Accepted Answer

This might be related: https://github.com/digitalocean/digitalocean-cloud-controller-manager/issues/150 https://www.digitalocean.com/community/questions/cannot-install-heapster-to-cluster-due-to-kubelets-not-allowing-to-get-metrics-on-port-10255

sudermanjr • December 31, 2018

This seems to be resolved in newer clusters that I have spun up. The aforementioned github issues point the way.

clenn • December 11, 2018