~/talk

Scaling Flux at BT: A Multi-Cluster Telco Migration Journey

on YouTube 26m
Talkat FluxCon NA 2025 · on Monday, 2025-11-10· at 16:35· Building B | Level 3 | B309· [infrastructure-as-code, kubernetes]

speaker

name:Chris Morandi
bluesky:chris-morandi.bsky.social

resources

video:https://youtu.be/-K3nUWH8Hvk
slides:none on file

summary

BT migrates a mature Terraform + GitLab deployment into a GitOps pipeline using Flux across about 30 clusters, replacing per-cluster state files and improving self-healing via reconciliation loops. They convert imperative scripts into K8s Jobs, confront overlay sprawl, stalled Helm releases and long dependency chains, and build ephemeral dev environments for NetBox and SDN tooling. Current progress is ~30% with a goal of ~80% by quarter end; upcoming work includes Flagger/Flux Operator for canaries, auto image updates, and safer DB migrations.

AI-written summary · about

chapters (8)

  1. 0:00Flux migration intro at BT
  2. 2:48Why Flux at BT
  3. 5:38Migration challenges and lessons
  4. 8:08Scaling Flux adoption
  5. 12:43Netbox to Flux migration
  6. 15:35Testing with Flux pipelines
  7. 16:16Current state and future
  8. 20:59Q&A

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