Debugging Kubernetes HTTP Drops with Isopcap | Technical Demo

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Isopcap is Kubernetes-native packet capture for platform teams that need packet-level evidence without SSHing into nodes, changing application pods, adding sidecars, or restarting workloads. It lets operators define targeted captures with Kubernetes resources and export standard PCAPng files for tools like tcpdump, termshark, and Wireshark.

In this demo, Christian Hernandez goes through how to use Isopcap to investigate an app team’s report that the shop service is dropping HTTP requests and seeing latency spikes. He runs targeted HTTP and DNS captures, inspect the packets, and shows how to turn vague symptoms into concrete findings.

Demo Highlights:

• Create targeted Isopcap captures for HTTP traffic on tcp port 80
• Retrieve PCAPng files from the Isopcap agent and inspect them with tcpdump and termshark
• Identify TCP reset packets behind reported HTTP “drops”
• Capture DNS traffic on udp port 53
• Correlate failed DNS lookups with latency symptoms before handing the findings back to the app team

• Debugging Kubernetes HTTP Drops with Isopcap Video

• Christian Hernandez, Technical Marketing Engineer

  Christian is a Technical Marketing Engineer and Tech Lead at Isovalent, now part of Cisco. He is a well rounded technologist with experience in infrastructure engineering, systems administration, enterprise architecture, tech support, advocacy, and product management. Passionate about OpenSource and containerizing the world one application at a time. He is currently a maintainer of the Argo Project and OpenGitOps. He focuses on GitOps practices, DevOps, Kubernetes, Network Security, and Containers. On his free time, he plays guitar, travels, and you can catch him touring wineries in California.

July 28, 2026