Building a Production eBPF Observability & Security Stack for Kubernetes in 2026

Building a Production eBPF Observability & Security Stack for Kubernetes in 2026 Understanding what's happening inside a production Kubernetes cluster running thousands of containers remains one of the hardest operational challenges. Attaching sidecar proxies increases resource overhead, and embedding SDKs requires application code changes. eBPF (extended Berkeley Packet Filter) solves this problem at the kernel level. According to the 2026 CNCF Observability Technical Advisory Group (TAG) survey, 67% of teams running Kubernetes at scale have already adopted at least one eBPF-based observability tool in production. This guide covers everything from the latest announcements at KubeCon EU 2026 to building a complete production observability and security stack with Cilium, Tetragon, Grafana Beyla, and the newly launched OpenTelemetry eBPF Instrumentation (OBI) . Why eBPF Became the Standard for Kubernetes Observability Let's start by comparing traditional observability approaches with the