eBPF Gives Kubernetes Full Network Visibility Without the Sidecar CPU Tax

Short summary

eBPF-based observability tools eliminate the 50+ vCPU idle cost of Istio sidecars by inspecting traffic in the Linux kernel instead of per-pod proxies. Cilium replaces kube-proxy with eBPF-native networking and policy, while Pixie captures application-level requests and database queries without code changes. This architectural shift is reshaping how enterprises handle observability in large Kubernetes clusters.

• •eBPF moves observability from sidecars into the kernel, eliminating 50vCPU+ idle costs at scale
• •Cilium and Pixie provide full L7 visibility without per-pod proxies, reducing overhead from ~50vCPU to <1vCPU
• •Major shift in Kubernetes observability architecture as service mesh adoption hit cost constraints

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