prometheus-node-exporter

Prometheus node-exporter is a Prometheus exporter for hardware and OS metrics exposed by *NIX kernels. The Prometheus Node Exporter Helm chart automates deployment and configuration of prometheus node-exporter in Kubernetes clusters using Minimus images.

Prerequisites

A subscription to the Minimus images included in the chart
A running Kubernetes cluster (v1.21 or higher is recommended)
kubectl installed and configured
Helm v3.8 or higher for OCI support (Installation instructions)
Cluster Admin privileges

Try It Out

In this example we will deploy prometheus node-exporter on a Kubernetes cluster using the Minimus Prometheus Node Exporter Helm chart. It will collect hardware and OS-level metrics from every node in your cluster.

Step 1: Start Cluster

If you have a cluster to work with, skip this step. Otherwise, start a Minikube cluster. Deployment instructions

Step 2: Create Secret

First, create a namespace:

kubectl create ns prometheus-node-exporter

Next, create a Kubernetes secret for the Minimus token so Helm will be able to pull images from the Minimus registry:

kubectl create secret docker-registry minimus-registry \
    --docker-server=reg.mini.dev \
    --docker-username=minimus \
    --docker-password={token} \
    --namespace=prometheus-node-exporter

Step 3: Deploy the Helm Chart

Deploy the Minimus Helm chart:

helm install my-prometheus-node-exporter oci://helm.mini.dev/prometheus-node-exporter \
  -n prometheus-node-exporter \
  --wait

If you want to override the chart's defaults, go to the Values tab, save a copy locally with your changes. Deploy the chart with your overrides using -f values.yaml:

helm install my-prometheus-node-exporter oci://helm.mini.dev/prometheus-node-exporter \
  -f values.yaml \
  -n prometheus-node-exporter \
  --wait

Step 4: Verify Prometheus Node Exporter is Running

Confirm the chart deployed successfully and prometheus node-exporter started:

kubectl get pods -n prometheus-node-exporter

You should see output similar to:

NAME                                       READY   STATUS    RESTARTS   AGE
my-prometheus-node-exporter-xxxxx          1/1     Running   0          2m

Step 5: Test HTTP Endpoint

Port-forward the prometheus-node-exporter service to access the metrics endpoint locally:

kubectl port-forward svc/my-prometheus-node-exporter -n prometheus-node-exporter 9100:9100

In a separate terminal, query the metrics endpoint:

curl -sf http://localhost:9100/metrics | head -20

You should see Prometheus-format metrics starting with node_:

# HELP node_cpu_seconds_total Seconds the CPUs spent in each mode.
# TYPE node_cpu_seconds_total counter
node_cpu_seconds_total{cpu="0",mode="idle"} 12345.67

Step 6: Clean Up

Uninstall the chart and delete the namespace to remove all resources:

helm uninstall my-prometheus-node-exporter -n prometheus-node-exporter
kubectl delete namespace prometheus-node-exporter

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