KubeCon + CloudNativeCon Europe 2023

Updating applications to include observability can be almost impossible, but the other option is not know if your application is even working. Enter Cilium which leverages eBPF to provide observability data with Prometheus metrics for your applications without having to modify the application itself. In this session we will explain how Cilium powered with Hubble and the Grafana LGTM stack is able to show Service to Service communication, monitor Golden Signals, detect transient network layer issues and identifies problematic API request with transparent tracing. Using a demo application we will demonstrate performance and metrics for that application and how the metrics change with increasing request volumes. We will show how metrics change when a new configuration of our application introduces error rates and increases request duration. Finally, we will show how tracing headers for the application can be exported with Hubble HTTP metrics as Exemplars to link metrics to traces in Grafana, monitoring each request and its duration using Tempo. The audience will walk away with knowledge on how to monitor service connectivity and collect tracing data and golden metrics using standard Prometheus, Grafana, and OpenTelemetry exported from Cilium and eBPF.