Lightning Talk: Mastering Zero Downtime Migrations Between Cilium Identity Alloca...
summary
Datadog migrates Cilium identities from KVStore to CRD by adding double-write mode (landed in Cilium 1.17), running scalability tests, tuning API server priority and fairness, and automating steps with Python. Rollback rehearsals and dashboards/alerts validate safety. The project synchronizes identities without traffic drops, decommissions etcd clusters, and yields measurable savings — successfully applied to more than 100 clusters in production.
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