Cilium — Questions

Open

• What is the real-world memory overhead of ztunnel in Cilium's mesh mode vs Istio ambient ztunnel?
• How does Cilium handle eBPF map memory pressure at 10,000+ pod scale?
• What is the migration path from kube-proxy to Cilium kube-proxy replacement?

Answered

• Q: Does Cilium work with kernel < 5.8? — No. eBPF features require >= 5.8.
• Q: Is Cilium a service mesh? — Yes, it includes sidecar-free mesh via Envoy + eBPF.