Cilium is an advanced, eBPF-based CNI plugin for Kubernetes which offers direct routing, eliminates the needs of kube-proxy & iptables, network policies, load balancing, and observability (real-time network traffic monitoring and tracing with Hubble).
One of the notable feature of Cilium is its deep integration of eBPF, which facilitates advanced networking capabilities, such as direct routing, without the performance penalties associated with overlay networks. This results in better scalability and improved resource usage, especially for large-scale clusters.

Cilium is an innovative open-source project that redefines networking and security for containerized applications. By leveraging the power of eBPF (extended Berkeley Packet Filter), Cilium provides efficient networking and transparent security capabilities for modern cloud-native environments. Readers exploring Cilium can gain insights into advanced networking concepts, such as service mesh architectures, network policy enforcement, and distributed application security.

cilium

Cilium, an eBPF-based CNI plugin for Kubernetes, offers advanced networking capabilities such as direct routing and load balancing without the need for separate solutions like kube-proxy and MetalLB. By integrating BGP, Cilium can advertise routing information, enhancing scalability and resource usage in large-scale clusters. A step-by-step guide is provided to set up Cilium's IPAM feature with BGP, install necessary manifests, and configure BGP on a router to expose a local LoadBalancer service with Kubernetes.

Local Kubernetes LoadBalancer Service Using Cilium BGP

Install quagga package on OpenWRT router #