It looks like heapster is not enabled on the cluster? Is this a planned feature?
kubectl top node
Error from server (NotFound): the server could not find the requested resource (get services http:heapster:)
I’ve used the same on other cloud providers (AKS, IKS) and it seems to be enabled…
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You can easily install metrics server to your cluster via marketplace:
https://marketplace.digitalocean.com/apps/kubernetes-metrics-server
Install metrics server chart
Update the command metrics server deployment and add the following two options to the pod command :
- --kubelet-insecure-tls
- --kubelet-preferred-address-types=InternalIP
Command will be look like this :
command:
- /metrics-server
- --kubelet-insecure-tls
- --kubelet-preferred-address-types=InternalIP
Wait two or three minutes, then the “top” command should work.
You have to deploy heapster in your cluster to collect metrics ;) by default its not activated on digitalocean k8s-cluster.
There is a helm chart for heapster: https://github.com/helm/charts/tree/master/stable/heapster
The following will help with understanding what is happening on the nodes:
$ cat bin/node-resources.sh
#!/bin/bash
set -euo pipefail
echo -e "Iterating...\n"
nodes=$(kubectl get node --no-headers -o custom-columns=NAME:.metadata.name)
for node in $nodes; do
echo "Node: $node"
kubectl describe node "$node" | sed '1,/Non-terminated Pods/d'
echo
done
I would also like to know this.