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Merge pull request #55741 from adnavare/bug/clarify_externalname

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Automatic merge from submit-queue (batch tested with PRs 55757, 55741, 55817, 55834, 51530). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Clarify ExternalNames are hostnames

Updates the documentation for ExternalName to clarify
that they adhere RFC-1123 hostname and are not DNS names.

Fixes #52266

**Release note**:

```release-note

```
This commit is contained in:
Kubernetes Submit Queue
2017-11-18 16:38:27 -08:00
committed by GitHub
parent 9a812b17a7 c8d5310098
commit 7910099e91
7 changed files with 10 additions and 7 deletions
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docs/api-reference/v1/definitions.html generated
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@@ -10682,7 +10682,7 @@ Examples:<br>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">externalName</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">externalName is the external reference that kubedns or equivalent will return as a CNAME record for this service. No proxying will be involved. Must be a valid DNS name and requires Type to be ExternalName.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">externalName is the external reference that kubedns or equivalent will return as a CNAME record for this service. No proxying will be involved. Must be a valid RFC-1123 hostname (<a href="https://tools.ietf.org/html/rfc1123">https://tools.ietf.org/html/rfc1123</a>) and requires Type to be ExternalName.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">string</p></td>
<td class="tableblock halign-left valign-top"></td>