Linkerd provides extensive observability functionality. It automatically instruments top-line metrics such as request volume, success rates, and latency distributions. In addition to these top-line metrics, Linkerd provides real time streams of the requests for all incoming and outgoing traffic.
Some deep dive topics on metrics:
Prometheus collects and stores all the Linkerd metrics. It is a component of the control plane and can be integrated with existing metric systems, such as an existing Prometheus install.
- Proxy Metrics Reference
The Linkerd proxy natively exports Prometheus metrics for all incoming and outgoing traffic.