A microservice that depends on three other services via DNS-based service discovery starts a deployment that briefly renames one of those dependent services, breaking startup for several minutes during the transition.

This highlights the operational risk of coupling service availability to a specific, exact service/DNS name rather than a more stable abstraction — recommend introducing a stable virtual service name or a service mesh/registry layer that can be repointed independently of the underlying deployment's specific naming, and treating service renames as a coordinated, backward-compatible migration (e.g., temporarily supporting both old and new names) rather than an atomic cutover.