Virtual Event
August 17–August 20, 2020
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Thursday, August 20 • 18:50 - 19:25
Deep-Dive: Packet-level Debugging of Bridged and Non-bridged CNI Plugins - Jay Vyas & Sedef Savas, VMware

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Finding the fault for k8s connectivity issues can be a daunting task and require several teams (DevOps, networking) to do their own due diligence. The best way to track down a connectivity error from the perspective of  a DevOps team is to deep-dive into packets’ journey through the Linux Network Stack.  In this session, we will walk through the following challenges for various open-source CNI providers, in real-time with the audience: If packets from your pods aren’t reaching their destination - how would you use tcpdump to determine where in the packet’s trajectory? Do you know what destination NAT’ing is, and at which step and how it happens (via iptables or IPVS)  for bridged and non-bridged CNI plugins? What about existing network policies and routes on your hardware - are there iptables rules conflicting with the rules added by kube-proxy?


Jay Vyas

Software Engineer, VMware
In addition to working for several years on several aspects of Kubernetes core since its inception (at Red Hat), Jay also has served as the Engineering lead for Cloud Native product lines at Synopsys (Blackduck), bringing Kubernetes based solutions at massive scales to 100s of customers... Read More →
avatar for sedef savas

sedef savas

Senior Software Engineer, VMware
Sedef Savas works at VMware as a software engineer and she is one of the maintainers of Cluster API Provider AWS project. Prior to this, her experience mostly lies in the networking domain from Kubernetes networking to Optical networking.

Thursday August 20, 2020 18:50 - 19:25 CEST
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