---
title: "Felix"
description: "Reference content for Felix in Calico Open Source, the per-node daemon that programs routes and policy rules into the Linux data plane."
product: "Calico Open Source"
version: "3.32 (latest)"
section: "Reference"
canonical_url: "https://docs.tigera.io/calico/latest/reference/felix/"
---

# Felix

## [📄️Configuring Felix](https://docs.tigera.io/calico/latest/reference/felix/configuration.md)

[Reference for Felix configuration parameters in Calico Open Source covering environment variables, FelixConfiguration fields, and per-node overrides.](https://docs.tigera.io/calico/latest/reference/felix/configuration.md)

## [📄️Monitoring Felix with Prometheus](https://docs.tigera.io/calico/latest/reference/felix/prometheus.md)

[Prometheus metrics reference for Felix in Calico Open Source covering counters and gauges exposed for data plane health and policy evaluation.](https://docs.tigera.io/calico/latest/reference/felix/prometheus.md)