How-To: Collect metrics with Prometheus

Prometheus collects and stores metrics as time series data. This guide will show you how to collect Radius control plane metrics to then be visualized and queried.

Install Prometheus on Kubernetes

1. Make sure you have the following pre-requisites:

   • Supported Kubernetes cluster
   • kubectl
   • Helm 3
   • Radius control plane installed

2. Create a namespace that can be used to deploy the Grafana and Prometheus monitoring tools:

   kubectl create namespace radius-monitoring
   

3. Install Prometheus into your monitoring namespace:

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

   If you are Minikube user or want to disable persistent volume for development purposes, you can disable it by using the following command.

   helm install radius-prom prometheus-community/prometheus -n radius-monitoring --set alertmanager.persistentVolume.enable=false --set pushgateway.persistentVolume.enabled=false --set server.persistentVolume.enabled=false
   

4. Validate your Prometheus installation:

   kubectl get pods -n radius-monitoring
   

   You should see something similar to the following:

   NAME                                                  READY   STATUS    RESTARTS   AGE
   radius-prom-kube-state-metrics-9849d6cc6-t94p8        1/1     Running   0          4m58s
   radius-prom-prometheus-alertmanager-749cc46f6-9b5t8   2/2     Running   0          4m58s
   radius-prom-prometheus-node-exporter-5jh8p            1/1     Running   0          4m58s
   radius-prom-prometheus-node-exporter-88gbg            1/1     Running   0          4m58s
   radius-prom-prometheus-node-exporter-bjp9f            1/1     Running   0          4m58s
   radius-prom-prometheus-pushgateway-688665d597-h4xx2   1/1     Running   0          4m58s
   radius-prom-prometheus-server-694fd8d7c-q5d59         2/2     Running   0          4m58s
   

5. Done! Prometheus is now installed and ready to collect metrics from the Radius control plane.

Next step: Add a Grafana dashboard

Now that you have Prometheus installed, you can visualize the metrics using Grafana. Follow the Grafana installation guide to get up and running with a Grafana dashboard.

Further reading

• Prometheus Installation
• Prometheus Query Language