Mastering Kubernetes - Second Edition

Discovering a federated service

Kubernetes provides KubeDNS as a built-in core component. KubeDNS uses a cluster-local DNS server as well as naming conventions to compose well-qualified (by namespace) DNS names conventions. For example, the-service is resolved to the the-service service in the default namespace, while the-service.the-namespace is resolved to the service called the-service in the the-namespace namespace, which is separate from the default the-service. Pods can find and access internal services easily with KubeDNS. Kubernetes cluster federation extends the mechanism to multiple clusters. The basic concept is the same, but another level of a federation is added. The DNS name of a service now consists of <service name>.<namespace ...