Mastering Service Mesh

Insight using Prometheus

Prometheus is a backend time series data collection service that is configured by default in Linkerd. It only keeps data for 6 hours in order to limit the Linkerd telemetry footprint to an acceptable range without adversely affecting performance. Grafana is the frontend and contains Linkerd pre-built dashboards, as we will soon see.

We can access Prometheus from inside the VM or from outside if we define an ingress rule for it. Let's define the Ingress for Prometheus using prometheus.linkerd.io hostname, which resolves to the internal IP address of the VM through our simulated load balancer:

1. Let's define the Prometheus ingress so that we can direct external traffic to the Linkerd-Prometheus service:

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