--- title: "Why Your Kubernetes Network is Still a Black Box — And How to Fix It" url: https://daily.dev/posts/why-your-kubernetes-network-is-still-a-black-box-and-how-to-fix-it-veqwpdzql source_url: https://cloudnativenow.com/contributed-content/why-your-kubernetes-network-is-still-a-black-box-and-how-to-fix-it/ type: article source: "Container Journal" published: 2026-03-17T09:58:10.844Z updated: 2026-03-17T09:58:36.760Z tags: ["linux", "kubernetes", "platform-engineering"] reading_time: 5 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Why Your Kubernetes Network is Still a Black Box — And How to Fix It **[Container Journal](https://daily.dev/sources/container_journal)** · 5 min read · 0 upvotes · 0 comments ## Summary Kubernetes networking is notoriously opaque, making incident diagnosis painful. eBPF offers kernel-level packet inspection with near-zero overhead, enabling true network observability rather than just monitoring. Microsoft Retina, an open-source CNI-agnostic DaemonSet-based tool, leverages eBPF to expose real-time network telemetry in Prometheus format. It operates in two modes: a metrics-only Legacy Mode for trend analysis and alerting, and a Hubble Mode for live traffic tracing that reveals exact packet drop reasons (NetworkPolicy denial, connection tracking timeouts, etc.) via the skb_drop_reason field. Retina requires no sidecars, no app code changes, and works across EKS, AKS, and GKE. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [GKE Network Interface, from kubenet to eBPF/Cilium to DRANET](https://daily.dev/posts/gke-network-interface-from-kubenet-to-ebpf-cilium-to-dranet-icaokuuxt) · Google Cloud · 1 upvotes · 0 comments - [Understanding Kubernetes Network Security](https://daily.dev/posts/understanding-kubernetes-network-security-i5js8crfk) · cilium · 4 upvotes · 0 comments - [Kernel-Level Ground Truth: Why eBPF is Replacing User-Space Agents for Security Observability](https://daily.dev/posts/kernel-level-ground-truth-why-ebpf-is-replacing-user-space-agents-for-security-observability-92jvpmrxl) · InfoQ · 0 upvotes · 0 comments --- Tags: [#linux](https://daily.dev/tags/linux), [#kubernetes](https://daily.dev/tags/kubernetes), [#platform-engineering](https://daily.dev/tags/platform-engineering) [View this post on daily.dev](https://daily.dev/posts/why-your-kubernetes-network-is-still-a-black-box-and-how-to-fix-it-veqwpdzql)