DevOps & Tooling / Knowledge library
Cilium
ebpf networking policies and hubble observability
Why learn Cilium?
Useful for controlling and inspecting communication in supported environments. Kernel capabilities and deployment configuration determine available behavior.
Where it came from
Cilium provides networking, security, and observability using eBPF-based capabilities. Its documentation connects network policy with visibility through Hubble.
Build your understanding
Work through these exercises in order. Try the task before opening a reference.
- Check kernel and cluster prerequisites.
- Trace a test service connection.
- Apply a narrowly scoped network policy.
- Verify both permitted and denied traffic.
- Use flow observations to explain a blocked connection.
Documentation and sources
- Official project documentation (docs.cilium.io)
Catalog research notes
- Research snapshot: September 9, 2026. This entry summarizes the linked primary documentation; it does not assert a latest release version.