Unable to get node metrics

[chlung]

Hi,
I deploy node-exporter to my 1.9 minikube environment by using node-exporter-daemonset.yml. Pod is running fine, but I don't see any new metrics which are collect by node-exporter, such as node_memory_MemFree. This is the command that I am running to get metrics.

kubectl get --raw http://prometheus:9090/metrics

Thanks.