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Whose Packet Is It Anyway? Life of a Packet Through a Service Mesh

Conference:  KubeCon + CloudNativeCon North America 2022
Authors: Kevin Leimkuhler, Douglas Jordan
2022-10-26

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The presentation discusses the use of service mesh and ephemeral containers in Kubernetes for debugging and observability purposes, with a focus on Kafka as an example.
  • Service mesh can be used for initial metadata requests in Kafka, but subsequent requests should go directly to specific brokers
  • TCP observability is limited in service mesh, so TCP dump and Wireshark can be used for packet captures
  • Ephemeral containers can be used to share network namespaces and run debugging tools like TCP dump
  • The speaker suggests integrating ephemeral containers into other open source tools like CaseNIc and using them for remote captures on pods
Tags:
Service Mesh
Packet Journey
Networking Rule Changes
Debugging Containers
Traffic Observation