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How do k8s dashbaord and metrics server communicate? Just like in Prometheus scrapes metrics exposed via REST. How to check what exactly metrics server exposes?

Guna K K
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1 Answers1

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Metrics server is using k8s metrics API to export mertics to k8s.

Also check: k8s monitoring architecture. This document proposes a high-level monitoring architecture for Kubernetes.

How to check what exactly metrics server exposes

Use api endpoint:

kubectl get --raw "/apis/metrics.k8s.io/v1beta1/pods" | jq
kubectl get --raw "/apis/metrics.k8s.io/v1beta1/nodes" | jq

If you don't have any custom metrics exposed you will see that the only exposed metrics are CPU and Memory (for every pod/node).

Matt
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