Document detail about headless Services

kubernetes · Feb 23, 2023 · 6deaa65 · 6deaa65
1 parent bf670ae
commit 6deaa65
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diff --git a/content/en/docs/concepts/services-networking/service.md b/content/en/docs/concepts/services-networking/service.md
@@ -840,6 +840,9 @@ either:
   * For IPv4 endpoints, the DNS system creates A records.
   * For IPv6 endpoints, the DNS system creates AAAA records.
 
+When you define a headless Service without a selector, the `port` must
+match the `targetPort`.
+
 ## Discovering services
 
 For clients running inside your cluster, Kubernetes supports two primary modes of