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A complete step-by-step guide to install and troubleshoot Metrics Server on Kubernetes using Helm — perfect for EKS, GKE, Minikube & Kubeadm clusters! 💡

👋 Introduction¶

Metrics Server is the heartbeat of Kubernetes performance monitoring 🫀. Whether you’re tuning autoscaling or simply checking node usage, it’s an essential component. However, Helm installation can get tricky if syntax or flags are off.

In this guide, you’ll learn how to:

âś… Add the Helm repo
âś… Install Metrics Server correctly (with --kubelet-insecure-tls)
âś… Verify the setup
âś… Use a custom values.yaml for better flexibility
Let’s dive in! 🏊♂️✨

🧩 Step 1: Add the Metrics Server Helm Repository¶

helm repo add metrics-server https://kubernetes-sigs.github.io/metrics-server/
helm repo update

đź“Ś This adds and refreshes the repo so you can access the latest Metrics Server chart.

📦 Step 2: Install Metrics Server via Helm¶

helm install metrics-server metrics-server/metrics-server \
  --namespace kube-system \
  --set "args={--kubelet-insecure-tls,--kubelet-preferred-address-types=InternalIP}"

đź’ˇ Why this matters:
Many clusters (like Minikube or bare-metal) need --kubelet-insecure-tls or they’ll fail TLS verification 🔒.

🔎 Step 3: Verify Your Installation¶

Check pod status:

kubectl get pods -n kube-system -l "app.kubernetes.io/name=metrics-server"

Check metrics API:

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

{"kind":"NodeMetricsList","apiVersion":"metrics.k8s.io/v1beta1","metadata":{},"items":[{"metadata":{"name":"kube1","creationTimestamp":"2025-05-21T10:56:12Z","labels":{"beta.kubernetes.io/arch":"amd64","beta.kubernetes.io/os":"linux","kubernetes.io/arch":"amd64","kubernetes.io/hostname":"kube1","kubernetes.io/os":"linux","node-role.kubernetes.io/control-plane":"","node.kubernetes.io/exclude-from-external-load-balancers":""}},"timestamp":"2025-05-21T10:55:59Z","window":"20.039s","usage":{"cpu":"210243026n","memory":"3123988Ki"}}]}

âś… You should see a JSON output with node stats.
❌ If not, run:

kubectl describe pod <metrics-server-pod-name> -n kube-system

đź“„ Create values.yaml:

args:
  - --kubelet-insecure-tls
  - --kubelet-preferred-address-types=InternalIP

Install using:

helm install metrics-server metrics-server/metrics-server \
  --namespace kube-system -f values.yaml

✨ Bonus: You can add options like nodeSelector, affinity, or tolerations here for advanced scheduling.

✅ Conclusion¶

Installing Metrics Server might seem like a small step, but it’s crucial for autoscaling and performance visibility 🚀.
Using the right Helm syntax or a clean values.yaml file can save you from cryptic errors and hours of debugging ⏱️.

👉 Now your Kubernetes cluster is ready to report accurate metrics like a pro!

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Kubernetes #Helm #MetricsServer #DevOps #K8sMonitoring #Kubeadm #EKS #GKE #Minikube #ClusterMonitoring #KubernetesAutoscaling¶

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