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The Kubernetes Metrics Server is an aggregator of resource usage data in your cluster, and it isn't deployed by default in Amazon EKS clusters. For more information, see Kubernetes Metrics Server on GitHub. The Metrics Server is commonly used by other Kubernetes add ons, such as the Horizontal Pod Autoscaler or the Kubernetes Dashboard. For more information, see Resource metrics pipeline in the Kubernetes documentation.

This topic explains how to deploy the Kubernetes Metrics Server on the EKS cluster.

Important
The metrics are meant for point-in-time analysis and aren't an accurate source for historical analysis. They can't be used as a monitoring solution or for other non-auto scaling purposes. For information about monitoring tools, see Observability in Amazon EKS.

Deploy / Update the Metrics Server

1. Deploy the Metrics Server with the following command:
% kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml

serviceaccount/metrics-server unchanged
clusterrole.rbac.authorization.k8s.io/system:aggregated-metrics-reader unchanged
clusterrole.rbac.authorization.k8s.io/system:metrics-server unchanged
rolebinding.rbac.authorization.k8s.io/metrics-server-auth-reader unchanged
clusterrolebinding.rbac.authorization.k8s.io/metrics-server:system:auth-delegator unchanged
clusterrolebinding.rbac.authorization.k8s.io/system:metrics-server unchanged
service/metrics-server unchanged
deployment.apps/metrics-server configured
apiservice.apiregistration.k8s.io/v1beta1.metrics.k8s.io unchanged

2. Verify that the metrics-server deployment is running the desired number of Pods.

% kubectl get deployment metrics-server -n kube-system
An example output is as follows.

NAME             READY   UP-TO-DATE   AVAILABLE   AGE
metrics-server   1/1     1            1           2y303d

References

Installing the Kubernetes Metrics Server