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description: KubeCon + CloudNativeCon NA 2026 runs in Salt Lake City, and the CNCF End User Technical Advisory Board shares session picks for end users. New Birds of...
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# KubeCon + CloudNativeCon NA 2026: End User TAB recommendations and tips

**[CNCF](https://daily.dev/sources/cncf)** · 8 min read · 0 upvotes · 0 comments

## Summary

KubeCon + CloudNativeCon NA 2026 runs in Salt Lake City, and the CNCF End User Technical Advisory Board shares session picks for end users. New Birds of Feather sessions will cover newly formed user groups (Platform Engineering, Public Sector, Telecom, Research) and a live attempt to build a reference architecture for agentic AI deployments. The End User TAB Town Hall moves to the project pavilion. Highlighted talks include Anthropic's account of a cluster-wide doom spiral from one innocent LIST call, Walmart's zero-downtime Canal-to-Cilium migration across hundreds of clusters, and Adobe's eBPF-based network cost attribution across 400K pods in 31K namespaces.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://www.cncf.io/blog/2026/10/29/kubecon-cloudnativecon-na-2026-end-user-tab-recommendations-and-tips>

## Questions this post answers

### What caused Anthropic's Kubernetes cluster to repeatedly fail with large node counts?

A single LIST request to the apiserver triggered a cascading failure across a cluster of tens of thousands of nodes, sending it into a 'doom spiral' twice in two weeks. This happens because the apiserver behaves like one ordered log; when watchers fall behind they receive a 410 Gone error and relist, which compounds the load and worsens the outage.

_Teams scaling Kubernetes clusters track real-world outage postmortems like this one on daily.dev._

### How did Walmart migrate its CNI from Canal to Cilium without downtime across hundreds of production clusters?

Walmart performed a zero-downtime CNI migration from Canal to Cilium across hundreds of production clusters spanning cloud and on-premises environments, despite having no published playbook for this at scale. The move addressed route-drop failures in Flannel beyond 300 nodes, iptables rule explosion as services grew, and etcd v2 incompatibility blocking upgrades.

_Engineers planning a risky CNI migration can follow large-scale case studies like this via daily.dev._

### How does Adobe attribute network egress costs to individual tenants in a multi-tenant Kubernetes environment?

Adobe attributes network costs per tenant across 400K pods in 31K namespaces spanning over 85 multi-tenant Kubernetes clusters using Retina eBPF agents to capture pod-level flows at the kernel. Prometheus enriches the data with node topology, and a CIDR-based classifier maps destination IPs to cost categories such as Local, Internet, Peering, Transit Gateway, and VPC Endpoint, with cross-AZ and cross-region modifiers matching cloud billing.

_Platform teams designing cost attribution for multi-tenant clusters can find case studies like this on daily.dev._

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---

Tags: [#linux](https://daily.dev/tags/linux), [#kubernetes](https://daily.dev/tags/kubernetes), [#cncf](https://daily.dev/tags/cncf)

[View this post on daily.dev](https://daily.dev/posts/kubecon-cloudnativecon-na-2026-end-user-tab-recommendations-and-tips-ihs4tvsun)

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