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Cilium eBPF Network

Kernel-level networking for Kubernetes using eBPF technology

⬢ ISIGABA 3Okunobunjwa
💰
+$50k-
Umthelela womholo
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15 izinyanga
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Ubunzima
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Imisebenzi
Ngokushesha

Cilium is a Kubernetes CNI (Container Network Interface) using Linux eBPF (extended Berkeley Packet Filter) for packet processing at kernel level. Fastest, most flexible network plugin available. Deep knowledge required: Linux kernel, eBPF bytecode, network protocols, Kubernetes architecture. Mastery: 12-18 months for DevOps/SRE engineers. Salary impact: $40-70k for platform engineers. Used by: Google Cloud, AWS, Kubernetes distros; not mainstream yet (2026) but rapidly adopted in cloud-native orgs.

Yini Cilium eBPF Network

Cilium is the next-generation Kubernetes network plugin using Linux eBPF. Fastest, most powerful, most complex. For serious platform engineers and cloud infrastructure teams. Boost: +$50k-$100k

🔧 AMATHULUZI KANYE NOKUKHONA
Cilium Kubernetes operatoreBPF/BPF programming (C, LLVM)Linux kernel tools (bpftool, perf)Kubernetes manifests and HelmWireshark/tcpdump (packet inspection)Linux networking tools (ip, iptables)Golang (for Cilium contributions)container-runtime tools (containerd, docker)

💰 Umholo ngesifunda

IsifundaOmushaOkwesigaba EsiphakathiOmdala
🇺🇸USA$110k$170k$260k
🇬🇧UK£90k£140k£220k
🇪🇺EU€95k€150k€230k
🇨🇦CANADAC$130kC$200kC$310k

🎓 Izitifiketi

Cilium Official Documentation→Linux Foundation eBPF Course→Kubernetes Networking Mastery (advanced)→

❓ Imibuzo Evamile

▶What is eBPF and how is Cilium using it?
eBPF = programs running in Linux kernel (safe sandbox). Cilium uses eBPF to process network packets at kernel level (faster than userspace). Examples: (1) network policy enforcement (drop packets without recompiling kernel), (2) load balancing, (3) observability (packet tracing). Traditional approach = iptables (slow, inflexible). Cilium = modern, programmable, 10x faster.
▶Why use Cilium instead of Calico or Flannel?
Calico = iptables-based, works everywhere, slower. Flannel = simple overlay, less security. Cilium = eBPF, fastest, best security policies. Trade-off: Cilium requires Linux 4.8+ (most clouds have this). If stuck on old Linux, use Calico.
▶Is Cilium production-ready (2026)?
Yes. Used by: Isovalent (company backing Cilium), Google Cloud, AWS, thousands of clusters. Stable since 2021. Not bleeding-edge anymore; mature. Some teams still prefer Calico (comfort, fewer surprises), but Cilium is production-solid.
▶How hard is Cilium eBPF programming?
Very hard if you write eBPF. Moderate hard if you just deploy Cilium (use pre-built policies). Most operators don't write eBPF; they configure Cilium (YAML). If you want to contribute/customize, eBPF is 6-12 months learning curve (C + kernel concepts).
▶What can I do with Cilium that I can't do with Calico?
Security policies at network level (layer 4-7 inspection, allow/deny based on DNS, HTTP host, path). Cilium can inspect encrypted traffic metadata. Load balancing without kube-proxy. Observability (packet loss, latency per pod-pair). Calico = layer 3 firewall; Cilium = full-stack network program.
▶How do I debug Cilium network issues?
Tools: (1) cilium connectivity test (sanity check), (2) cilium monitor (live packet trace), (3) bpftool (inspect eBPF programs), (4) Hubble (observability UI). Common issues: IP overlap, pod CNI misconfiguration, eBPF map overflow. Debugging is deeper than Calico (kernel-level knowledge required).
▶What salary for Cilium expertise?
Platform engineer ($120-160k) + Cilium mastery = $160-220k. SRE ($130-170k) + Cilium = $170-240k. Rare skill: maybe 500 Cilium experts globally in 2026. High demand: Google Cloud, AWS, startups building cloud platforms. If you own this, you're unfireable.
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