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docs: Add note about using valid DNS labels for service names (#7035) 

Add note about using valid DNS labels for service names
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John Cowen 2020-01-15 15:36:17 +00:00 committed by GitHub
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9
website/source/api/agent/service.html.md
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@ -495,14 +495,17 @@ Note that this endpoint, unlike most also [supports `snake_case`](/docs/agent/se
service definition keys for compatibility with the config file format.
- `Name` `(string: <required>)` - Specifies the logical name of the service.
Many service instances may share the same logical service name.
Many service instances may share the same logical service name. We recommend using
[valid DNS labels](https://en.wikipedia.org/wiki/Hostname#Restrictions_on_valid_hostnames)
for [compatibility with external DNS](/docs/agent/services.html#service-and-tag-names-with-dns).
- `ID` `(string: "")` - Specifies a unique ID for this service. This must be
unique per _agent_. This defaults to the `Name` parameter if not provided.
- `Tags` `(array<string>: nil)` - Specifies a list of tags to assign to the
service. These tags can be used for later filtering and are exposed via the
APIs.
service. These tags can be used for later filtering and are exposed via the APIs.
We recommend using [valid DNS labels](https://en.wikipedia.org/wiki/Hostname#Restrictions_on_valid_hostnames)
for [compatibility with external DNS](/docs/agent/services.html#service-and-tag-names-with-dns)
- `Address` `(string: "")` - Specifies the address of the service. If not
provided, the agent's address is used as the address for the service during

6
website/source/api/catalog.html.md
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@ -53,8 +53,10 @@ The table below shows this endpoint's support for
- `Service` `(Service: nil)` - Specifies to register a service. If `ID` is not
provided, it will be defaulted to the value of the `Service.Service` property.
Only one service with a given `ID` may be present per node. The service
`Tags`, `Address`, `Meta`, and `Port` fields are all optional. For more
Only one service with a given `ID` may be present per node. We recommend using
[valid DNS labels](https://en.wikipedia.org/wiki/Hostname#Restrictions_on_valid_hostnames)
for service definition names for [compatibility with external DNS](/docs/agent/services.html#service-and-tag-names-with-dns).
The service `Tags`, `Address`, `Meta`, and `Port` fields are all optional. For more
information about these fields and the implications of setting them,
see the [Service - Agent API](/api/agent/service.html) page
as registering services differs between using this or the Services Agent endpoint.

3
website/source/docs/agent/services.html.md
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@ -109,6 +109,9 @@ The `tags` property is a list of values that are opaque to Consul but
can be used to distinguish between `primary` or `secondary` nodes,
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.html#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 `port` field can be used as well to make a service-oriented architecture