Platform & DevOps·Traffic into and inside the cluster
the name resolves to every instance's own address instead of one virtual one, because the client wants to choose.
Headless service
Also calledheadless, no cluster IP
A service with no virtual address, whose DNS record returns the individual backend addresses. It exists for clients that need to address members directly — database replicas, brokers, anything doing its own connection pooling or its own load balancing. It is also the standard fix for a gRPC or HTTP/2 client whose single long-lived connection would otherwise pin itself to one backend forever.