Prometheus Introduction

Prometheus is an open-source monitoring and alerting toolkit. It is widely used to collect metrics, query them over time, and trigger alerts when systems behave unexpectedly.

Installation using Helm

One common way to install Prometheus in Kubernetes is with the kube-prometheus-stack Helm chart. It includes Prometheus along with related components such as Grafana, Alertmanager, Node Exporter, and kube-state-metrics.

Step 1: Create a Kubernetes Namespace

kubectl create namespace monitoring

Step 2: Install Prometheus Operator

helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
helm repo update
helm install prometheus prometheus-community/kube-prometheus-stack -n monitoring

Step 3: Access through localhost using port forwarding

kubectl port-forward svc/prometheus-grafana 3000:80 -n monitoring

The Grafana dashboard will be available at http://localhost:3000. The default username is admin. The initial password usually comes from the chart configuration or the generated Kubernetes secret, depending on the version you install.

What's next?

• Learning Resources - Learn more about Prometheus with these resources.