How to Deploy Prometheus on Kubernetes with Helm: A Step‑by‑Step Guide

Getting Started with Helm and Helm Charts

ArtifactHub provides public and private repositories for Helm charts. Helm charts simplify installing and managing Kubernetes applications such as Prometheus.

Install Helm

First start a Minikube cluster: minikube start --driver=docker Then install Helm according to your operating system:

sudo apt-get install helm

choco install Kubernetes-helm

brew install helm

Refer to the official Helm documentation if needed.

Helm Commands

Run helm to list all commands. Common actions include helm search, helm pull, helm install, and helm list.

helm search – search charts in ArtifactHub.

helm pull – download a chart.

helm install – upload the chart to Kubernetes.

helm list – list releases of charts.

Prometheus Helm Charts

Search for Prometheus charts: helm search hub prometheus Add the official Prometheus community repository and update:

helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
helm repo update

Install Prometheus Helm Chart on a K8s Cluster

Install the chart:

helm install prometheus prometheus-community/prometheus

The command outputs the release name, namespace, and notes on accessing the server and Alertmanager.

Expose the prometheus‑server Service

Expose the ClusterIP service as a NodePort:

kubectl expose service prometheus-server --type=NodePort --target-port=9090 --name=prometheus-server-ext

Access the service from outside the cluster: minikube service prometheus-server-ext After a short wait, the generated URL can be opened in a browser to view the Prometheus UI.