Test Cilium CNI in the cluster

[ricsanfre]

Deploy and test Cilium CNI as potential replacement for Flannel, kube-proxy and MetalLB.

References

• https://www.civo.com/blog/calico-vs-flannel-vs-cilium
• https://medium.com/@juanfbl9307/transform-your-raspberry-pi-lightweight-power-with-k3s-and-cilium-a43c691346ef
• https://isovalent.com/blog/post/migrating-from-metallb-to-cilium/
• https://blog.stonegarden.dev/articles/2024/02/bootstrapping-k3s-with-cilium/
• https://cilium.io/use-cases/kube-proxy/
• https://ebpf.io/

[ricsanfre]

Cilium kube-proxy replacement might impact Istio integration if not configured properly

• https://www.solo.io/blog/istio-cilium-kube-proxy-replacement/
• https://docs.cilium.io/en/latest/network/servicemesh/istio/