AWS::ServiceDiscovery::PublicDnsNamespace - Amazon CloudFormation
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Creates a public namespace based on DNS, which is visible on the internet. The namespace defines your service naming scheme. For example, if you name your namespace and name your service backend, the resulting DNS name for the service is You can discover instances that were registered with a public DNS namespace by using either a DiscoverInstances request or using DNS. For the current quota on the number of namespaces that you can create using the same Amazon Web Services account, see Amazon Cloud Map quotas in the Amazon Cloud Map Developer Guide.


The CreatePublicDnsNamespace API operation is not supported in the Amazon GovCloud (US) Regions.


To declare this entity in your Amazon CloudFormation template, use the following syntax:


{ "Type" : "AWS::ServiceDiscovery::PublicDnsNamespace", "Properties" : { "Description" : String, "Name" : String, "Properties" : Properties, "Tags" : [ Tag, ... ] } }


Type: AWS::ServiceDiscovery::PublicDnsNamespace Properties: Description: String Name: String Properties: Properties Tags: - Tag



A description for the namespace.

Required: No

Type: String

Maximum: 1024

Update requires: No interruption


The name that you want to assign to this namespace.


Do not include sensitive information in the name. The name is publicly available using DNS queries.

Required: Yes

Type: String

Pattern: ^([a-zA-Z0-9]([a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z0-9]([a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])?$

Maximum: 253

Update requires: Replacement


Properties for the public DNS namespace.

Required: No

Type: Properties

Update requires: No interruption


The tags for the namespace. Each tag consists of a key and an optional value, both of which you define. Tag keys can have a maximum character length of 128 characters, and tag values can have a maximum length of 256 characters.

Required: No

Type: Array of Tag

Minimum: 0

Maximum: 200

Update requires: Updates are not supported.

Return values


When you pass the logical ID of this resource to the intrinsic Ref function, Ref returns the value of Id for the namespace, such as ns-e4anhexample0004.

For more information about using the Ref function, see Ref.


The Fn::GetAtt intrinsic function returns a value for a specified attribute of this type. The following are the available attributes and sample return values.

For more information about using the Fn::GetAtt intrinsic function, see Fn::GetAtt.


The Amazon Resource Name (ARN) of the public namespace.


The ID for the Route 53 hosted zone that Amazon Cloud Map creates when you create a namespace.


The ID of the public namespace.


Create a public DNS namespace

The following example creates a public DNS namespace named


{ "Type" : "AWS::ServiceDiscovery::PublicDnsNamespace", "Properties" : { "Description" : "Amazon Cloud Map public DNS namespace for website", "Name" : "", "Properties": { "DnsProperties": { "SOA": { "TTL": 100 } } } } }


Type: 'AWS::ServiceDiscovery::PublicDnsNamespace' Properties: Description: Amazon Cloud Map public DNS namespace for website Name: Properties: DnsProperties: SOA: TTL: 100

See also