I am trying to run horizontal pod autoscaler in kubernetes, want to auto scale my pods based on cpu default metrics. For that I installed metrics server after that I can see metrics - metrics.k8s.io/v1beta1 (kubectl api-versions). Then I tried deploying prometheus-operator. But upon runnning kubectl top node/pod - error I am getting is
error: Metrics not available for pod default/web-deployment-658cd556f8-ztf6c, age: 35m23.264812635s" and "error: metrics not available yet"Do I need to run heapster?
@batman, as you said enabling minikube metrics-server add-on is enough in case of using minikube.
In general case, if using metrics-server you edited the metrics server deployment by running: kubectl edit deployment metrics-server -n kube-system
Under spec: -> containers: add following flag:
spec:
containers:
- command:
- /metrics-server
- --kubelet-insecure-tlsAs described on metrics-server github:
--kubelet-insecure-tls: skip verifying Kubelet CA certificates. Not recommended for production usage, but can be useful in test clusters with self-signed Kubelet serving certificates.
Here you can find tutorial describing HPA using custom metrics and Prometheus.
In minikube, we have to enable metrics-server add-on.
minikube addons list
minikube addons enable metrics-serverThen create hpa, deployment and boom!!
Anyone has done autoscaling based on custom metrics? like based on no. of http requests?