Zero-Downtime Config Updates with Envoy xDS: How CDS, EDS, LDS, and RDS Work Together
Envoy's xDS API splits config into LDS, RDS, CDS, and EDS resources pushed incrementally over gRPC — enabling zero-downtime routing changes, canary deployments via EDS weight adjustments, and fleet-wide consistency without proxy restarts. Covers ADS atomic updates and Delta xDS bandwidth savings.