In-person + Virtual
16 -20 May
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Friday, May 20 • 14:00 - 14:35
Better Bandwidth Management with eBPF - Daniel Borkmann & Christopher M. Luciano, Isovalent

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Kubernetes provides many knobs for managing common system resources such as vCPUs and memory limits per Pod, but often forgotten is the effect of unbounded network communication in a cluster. A large churn of packets from several services can starve bandwidth for other services. Also, out of the box TCP congestion management is not optimal for Internet-facing services. In this talk we will explore how eBPF can be leveraged to dynamically insert logic for flexible, efficient and scalable rate limiting and bandwidth management on a per-Pod basis. This talk details: - The scalability limits of token bucket filters by the bandwidth plugin, and why EDT (Earliest Departure Time) combined with eBPF is a major step forward. - How TCP congestion control with BBR can now be leveraged for Pods thanks to eBPF for significantly improving application latency and throughput. - The benefits of enforcing bandwidth limits at the egress point and considerations when to use ingress enforcement.

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Daniel Borkmann

Software Engineer, Isovalent
Daniel Borkmann co-created eBPF and is a kernel developer at Isovalent working on all things eBPF, the Linux kernel and Cilium's networking datapath. He is a long-term Linux kernel core contributor in the eBPF and networking subsystem for over a decade, and co-maintains both eBPF... Read More →

Christopher M. Luciano

Senior Solutions Architect, Isovalent
Christopher M Luciano is a Senior Solutions Architect at Isovalent. His experience as a container platform team lead enables him to help enterprises to reliably scale their Kubernetes clusters with Cilium. Christopher is a maintainer of Kubernetes networking components and assists... Read More →

Friday May 20, 2022 14:00 - 14:35 CEST
Pavilion 4, Room A | Level 2 | Central Forum Feria Valencia