Merge pull request #29114 from tengqm/fix-name-requirement

Fix service name requirement

Author: k8s-ci-robot

content/en/docs/concepts/overview/working-with-objects/names.md

@@ -28,7 +28,7 @@ For non-unique user-provided attributes, Kubernetes provides [labels](/docs/conc
 In cases when objects represent a physical entity, like a Node representing a physical host, when the host is re-created under the same name without deleting and re-creating the Node, Kubernetes treats the new host as the old one, which may lead to inconsistencies.
 {{< /note >}}
 
-Below are three types of commonly used name constraints for resources.
+Below are four types of commonly used name constraints for resources.
 
 ### DNS Subdomain Names
 
@@ -41,7 +41,7 @@ This means the name must:
 - start with an alphanumeric character
 - end with an alphanumeric character
 
-### DNS Label Names
+### RFC 1123 Label Names {#dns-label-names}
 
 Some resource types require their names to follow the DNS
 label standard as defined in [RFC 1123](https://tools.ietf.org/html/rfc1123).
@@ -52,6 +52,17 @@ This means the name must:
 - start with an alphanumeric character
 - end with an alphanumeric character
 
+### RFC 1035 Label Names
+
+Some resource types require their names to follow the DNS
+label standard as defined in [RFC 1035](https://tools.ietf.org/html/rfc1035).
+This means the name must:
+
+- contain at most 63 characters
+- contain only lowercase alphanumeric characters or '-'
+- start with an alphabetic character
+- end with an alphanumeric character
+
 ### Path Segment Names
 
 Some resource types require their names to be able to be safely encoded as a

content/en/docs/concepts/services-networking/service.md

@@ -72,7 +72,7 @@ A Service in Kubernetes is a REST object, similar to a Pod.  Like all of the
 REST objects, you can `POST` a Service definition to the API server to create
 a new instance.
 The name of a Service object must be a valid
-[DNS label name](/docs/concepts/overview/working-with-objects/names#dns-label-names).
+[RFC 1035 label name](/docs/concepts/overview/working-with-objects/names#rfc-1035-label-names).
 
 For example, suppose you have a set of Pods where each listens on TCP port 9376
 and contains a label `app=MyApp`: