This is the new *CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [AWS CloudFormation User Guide](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/Welcome.html).

# AWS::ServiceDiscovery::HttpNamespace
<a name="aws-resource-servicediscovery-httpnamespace"></a>

Creates an HTTP namespace. Service instances registered using an HTTP namespace can be discovered using a `DiscoverInstances` request but can't be discovered using DNS.

For the current quota on the number of namespaces that you can create using the same AWS account, see [AWS Cloud Map quotas](https://docs.aws.amazon.com/cloud-map/latest/dg/cloud-map-limits.html) in the *AWS Cloud Map Developer Guide*.

## Syntax
<a name="aws-resource-servicediscovery-httpnamespace-syntax"></a>

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

### JSON
<a name="aws-resource-servicediscovery-httpnamespace-syntax.json"></a>

```
{
  "Type" : "AWS::ServiceDiscovery::HttpNamespace",
  "Properties" : {
      "[Description](#cfn-servicediscovery-httpnamespace-description)" : String,
      "[Name](#cfn-servicediscovery-httpnamespace-name)" : String,
      "[Tags](#cfn-servicediscovery-httpnamespace-tags)" : [ Tag, ... ]
    }
}
```

### YAML
<a name="aws-resource-servicediscovery-httpnamespace-syntax.yaml"></a>

```
Type: AWS::ServiceDiscovery::HttpNamespace
Properties:
  [Description](#cfn-servicediscovery-httpnamespace-description): String
  [Name](#cfn-servicediscovery-httpnamespace-name): String
  [Tags](#cfn-servicediscovery-httpnamespace-tags): 
    - Tag
```

## Properties
<a name="aws-resource-servicediscovery-httpnamespace-properties"></a>

`Description`  <a name="cfn-servicediscovery-httpnamespace-description"></a>
A description for the namespace.  
*Required*: No  
*Type*: String  
*Maximum*: `1024`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Name`  <a name="cfn-servicediscovery-httpnamespace-name"></a>
The name that you want to assign to this namespace.  
*Required*: Yes  
*Type*: String  
*Pattern*: `^(?!arn:)[!-~]{1,1024}$`  
*Maximum*: `1024`  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`Tags`  <a name="cfn-servicediscovery-httpnamespace-tags"></a>
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](aws-properties-servicediscovery-httpnamespace-tag.md)  
*Minimum*: `0`  
*Maximum*: `200`  
*Update requires*: Updates are not supported.

## Return values
<a name="aws-resource-servicediscovery-httpnamespace-return-values"></a>

### Ref
<a name="aws-resource-servicediscovery-httpnamespace-return-values-ref"></a>

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

For more information about using the `Ref` function, see [https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-ref.html](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-ref.html).

### Fn::GetAtt
<a name="aws-resource-servicediscovery-httpnamespace-return-values-fn--getatt"></a>

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 [https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-getatt.html](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-getatt.html).

#### 
<a name="aws-resource-servicediscovery-httpnamespace-return-values-fn--getatt-fn--getatt"></a>

`Arn`  <a name="Arn-fn::getatt"></a>
The Amazon Resource Name (ARN) of the namespace, such as `arn:aws:service-discovery:us-east-1:123456789012:http-namespace/http-namespace-a1bzhi`.

`Id`  <a name="Id-fn::getatt"></a>
The ID of the namespace.

## Examples
<a name="aws-resource-servicediscovery-httpnamespace--examples"></a>



### Create an HTTP namespace
<a name="aws-resource-servicediscovery-httpnamespace--examples--Create_an_HTTP_namespace"></a>

The following example creates an HTTP namespace named `example-namespace`.

#### JSON
<a name="aws-resource-servicediscovery-httpnamespace--examples--Create_an_HTTP_namespace--json"></a>

```
{
    "Resources": {
        "HttpNamespace": {
            "Type": "AWS::ServiceDiscovery::HttpNamespace",
            "Properties": {
                "Description": "AWS Cloud Map HTTP namespace for resources for example.com website",
                "Name": "example-namespace"
            }
        }
    }
}
```

#### YAML
<a name="aws-resource-servicediscovery-httpnamespace--examples--Create_an_HTTP_namespace--yaml"></a>

```
Resources:
  HttpNamespace:
    Type: AWS::ServiceDiscovery::HttpNamespace
    Properties:
      Description: AWS Cloud Map HTTP namespace for resources for example.com website
      Name: example-namespace
```

## See also
<a name="aws-resource-servicediscovery-httpnamespace--seealso"></a>
+ [CreateHttpNamespace](https://docs.aws.amazon.com/cloud-map/latest/api/API_CreateHttpNamespace.html) in the * AWS Cloud Map API Reference *



# AWS::ServiceDiscovery::HttpNamespace Tag
<a name="aws-properties-servicediscovery-httpnamespace-tag"></a>

A custom key-value pair that's associated with a resource.

## Syntax
<a name="aws-properties-servicediscovery-httpnamespace-tag-syntax"></a>

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

### JSON
<a name="aws-properties-servicediscovery-httpnamespace-tag-syntax.json"></a>

```
{
  "[Key](#cfn-servicediscovery-httpnamespace-tag-key)" : String,
  "[Value](#cfn-servicediscovery-httpnamespace-tag-value)" : String
}
```

### YAML
<a name="aws-properties-servicediscovery-httpnamespace-tag-syntax.yaml"></a>

```
  [Key](#cfn-servicediscovery-httpnamespace-tag-key): String
  [Value](#cfn-servicediscovery-httpnamespace-tag-value): String
```

## Properties
<a name="aws-properties-servicediscovery-httpnamespace-tag-properties"></a>

`Key`  <a name="cfn-servicediscovery-httpnamespace-tag-key"></a>
The key identifier, or name, of the tag.  
*Required*: Yes  
*Type*: String  
*Minimum*: `1`  
*Maximum*: `128`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Value`  <a name="cfn-servicediscovery-httpnamespace-tag-value"></a>
The string value that's associated with the key of the tag. You can set the value of a tag to an empty string, but you can't set the value of a tag to null.  
*Required*: Yes  
*Type*: String  
*Minimum*: `0`  
*Maximum*: `256`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)