It is possible to create a service grouping that does not allocate an IP address or forward traffic, if there is a reason that you want to definitively control what specific pods you connect and communicate with. This kind of service is called a headless service. You can request this setup by explicitly setting ClusterIP to None within the service definition:
For example, a headless service might be:
kind: ServiceapiVersion: v1metadata: name: flask-servicespec: ClusterIP: None selector: app: flask
For these services, DNS entries will be created that point to the Pods backing the service, and that DNS will be automatically updated as Pods matching the selector come online (or disappear).
NOTE: Be aware that DNS caching could ...
