As we have seen in this chapter, the Linkerd observability feature is simple and out of the box, which means it doesn't need any special configuration. It presents the key performance indicators for the deployment, pod, and route levels through both the CLI and the dashboard. Its integration with Prometheus through a built-in panel for Grafana is an easy way to drill down from a higher level to a lower level, as shown in the exercises in this chapter.

One of the interesting and useful features of Linkerd is that it can aggregate and show Key Performance Indicators (KPI) such as RPS, P50, P95, P99, and Success Rate (SR). These KPIs can be very helpful to SRE team members when they need to investigate problems.

With this chapter, we have explored the various features of the Linkerd service mesh. In the next chapter, we will go through the third service mesh – Consul, which also has its unique and useful features.