360 Tech Engineering

May 24, 2021 · Cloud Native

Understanding the Calico CNI Plugin: Code Walkthrough and Network Resource Creation

This article provides a detailed walkthrough of the Calico CNI plugin source code, explaining how the calico and calico‑ipam binaries are built, how the ADD command creates WorkloadEndpoint objects, veth pairs, routes, and sysctl settings, and how these components integrate with the Calico datastore in a Kubernetes environment.