Visualising metrics using Grafana

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Envoy Gateway provides support for exposing Envoy Proxy metrics to a Prometheus instance. This guide shows you how to visualise the metrics exposed to prometheus using grafana.

Prerequisites

Follow the steps from the Quickstart to install Envoy Gateway and the example manifest. Before proceeding, you should be able to query the example backend using HTTP.

Follow the steps from the Proxy Observability to enable prometheus metrics.

Prometheus is used to scrape metrics from the Envoy Proxy instances. Install Prometheus:

helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
helm repo update
helm upgrade --install prometheus prometheus-community/prometheus -n monitoring --create-namespace

Grafana is used to visualise the metrics exposed by the envoy proxy instances. Install Grafana:

helm repo add grafana https://grafana.github.io/helm-charts
helm repo update
helm upgrade --install grafana grafana/grafana -f https://raw.githubusercontent.com/envoyproxy/gateway/latest/examples/grafana/helm-values.yaml -n monitoring --create-namespace

Expose endpoints:

GRAFANA_IP=$(kubectl get svc grafana -n monitoring -o jsonpath='{.status.loadBalancer.ingress[0].ip}')

Connecting Grafana with Prometheus datasource

To visualise metrics from Prometheus, we have to connect Grafana with Prometheus. If you installed Grafana from the command from prerequisites sections, the prometheus datasource should be already configured.

You can also add the data source manually by following the instructions from Grafana Docs.