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Improve doc: add note about address validation (#10123) 

* Update website/content/docs/discovery/services.mdx with address field behavior.

Co-authored-by: Jono Sosulska <42216911+jsosulska@users.noreply.github.com>

Co-authored-by: Jono Sosulska <42216911+jsosulska@users.noreply.github.com>
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Luigi Tagliamonte 2021-04-29 10:37:50 -07:00 committed by GitHub
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@ -120,8 +120,9 @@ different versions, or any other service level labels.
We recommend using [valid DNS labels](https://en.wikipedia.org/wiki/Hostname#Restrictions_on_valid_hostnames)
for service definition names and tags for [compatibility with external DNS](/docs/agent/services#service-and-tag-names-with-dns)
The `address` field can be used to specify a service-specific IP address. By
default, the IP address of the agent is used, and this does not need to be provided.
The `address` field is optional, and can be used to specify a service-specific IP address or a hostname.
There is no server-side validation of this field, and it can be set to any string. When this value is not provided,
the IP address of the agent node is used by default.
The `port` field can be used as well to make a service-oriented architecture
simpler to configure; this way, the address and port of a service can
be discovered.