Cilium eBPF Networking

Manage Cilium and Hubble network observability for Kubernetes. Writes eBPF-based network policies, observes live traffic flows with Hubble, and troubleshoots pod-to-pod connectivity and dropped packets.

This skill operates Cilium: authoring CiliumNetworkPolicy (L3/L4/L7), observing service maps and flow logs with Hubble, and debugging connectivity, DNS, and policy drops in an eBPF-based dataplane. Use it to secure and observe Kubernetes networking without a sidecar.

When to use

Use when managing Cilium — writing eBPF network policies, observing traffic flows with Hubble, or troubleshooting Kubernetes pod connectivity and dropped packets.

Examples

Lock down a namespace

L3/L4 policy

Write a CiliumNetworkPolicy that only allows the frontend pods to reach the api pods on port 8080 and denies all other ingress in the namespace

Debug dropped traffic

Observe with Hubble

Requests from checkout to payments are timing out — use Hubble to observe the flows and identify whether a Cilium policy is dropping them