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This post explains how Airbnb safely upgrades Istio across tens of thousands of pods on dozens of Kubernetes clusters without workload team coordination.
•Airbnb follows Istio's canary upgrade model, running two Istiod revisions simultaneously so workloads on different versions can still communicate
•A rollouts.yml file controls version distribution per namespace using consistent hashing, enabling gradual, deterministic rollouts and easy rollbacks
•Krispr, an in-house mutation framework, injects the correct Istio revision label at CI time and again at pod admission, decoupling upgrades from workload deployments
•Node and pod max lifetime of two weeks guarantees all Kubernetes workloads are upgraded within four weeks even without redeployment
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VM workloads are handled separately via a pull-based agent that reads rollouts.yml and applies the correct Istio version on each VM
This summary was automatically generated by AI based on the original article and may not be fully accurate.
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