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AWS Documentation » AWS CloudFormation » User Guide » Amazon Simple Notification Service Resource Type Reference » AWS::SNS::Subscription

AWS::SNS::Subscription

The AWS::SNS::Subscription resource subscribes an endpoint to an Amazon Simple Notification Service (Amazon SNS) topic. For a subscription to be created, the owner of the endpoint must confirm the subscription.

Syntax

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

JSON

{
  "Type" : "AWS::SNS::Subscription",
  "Properties" : {
      "DeliveryPolicy" : Json,
      "Endpoint" : String,
      "FilterPolicy" : Json,
      "Protocol" : String,
      "RawMessageDelivery" : Boolean,
      "RedrivePolicy" : Json,
      "Region" : String,
      "TopicArn" : String
    }
}

YAML

Type: AWS::SNS::Subscription
Properties: 
  DeliveryPolicy: Json
  Endpoint: String
  FilterPolicy: Json
  Protocol: String
  RawMessageDelivery: Boolean
  RedrivePolicy: Json
  Region: String
  TopicArn: String

Properties

DeliveryPolicy

The delivery policy JSON assigned to the subscription. Enables the subscriber to define the message delivery retry strategy in the case of an HTTP/S endpoint subscribed to the topic. For more information, see GetSubscriptionAttributes in the Amazon Simple Notification Service API Reference and Message Delivery Retries in the Amazon SNS Developer Guide.

Required: No

Type: Json

Update requires: No interruption

Endpoint

The subscription's endpoint. The endpoint value depends on the protocol that you specify. For more information, see the Endpoint parameter of the Subscribe action in the Amazon Simple Notification Service API Reference.

Required: No

Type: String

Update requires: Replacement

FilterPolicy

The filter policy JSON assigned to the subscription. Enables the subscriber to filter out unwanted messages. For more information, see GetSubscriptionAttributes in the Amazon Simple Notification Service API Reference and Message Filtering in the Amazon SNS Developer Guide.

Required: No

Type: Json

Update requires: No interruption

Protocol

The subscription's protocol. For more information, see the Protocol parameter of the Subscribe action in the Amazon Simple Notification Service API Reference.

Required: Yes

Type: String

Update requires: Replacement

RawMessageDelivery

When set to true, enables raw message delivery. Raw messages don't contain any JSON formatting and can be sent to Amazon SQS and HTTP/S endpoints. For more information, see GetSubscriptionAttributes in the Amazon Simple Notification Service API Reference.

Required: No

Type: Boolean

Update requires: No interruption

RedrivePolicy

The redrive policy JSON assigned to the subscription. Sends undeliverable messages to the specified dead-letter queue. Messages that can't be delivered due to client errors (for example, when the subscribed endpoint is unreachable) or server errors (for example, when the service that powers the subscribed endpoint becomes unavailable) are held in the dead-letter queue for further analysis or reprocessing.

For more information, see GetSubscriptionAttributes in the Amazon Simple Notification Service API Reference and Dead-Letter Queues in the Amazon SNS Developer Guide.

Required: No

Type: Json

Update requires: No interruption

Region

For cross-region subscriptions, the region in which the topic resides.

If no region is specified, CloudFormation uses the region of the caller as the default.

If you perform an update operation that only updates the Region property of a AWS::SNS::Subscription resource, that operation will fail unless you are either:

  • Updating the Region from NULL to the caller region.

  • Updating the Region from the caller region to NULL.

Required: No

Type: String

Update requires: No interruption

TopicArn

The ARN of the topic to subscribe to.

Required: Yes

Type: String

Update requires: Replacement

Examples

Create a subscription with mandatory attributes

The following example creates a subscription with only an endpoint, protocol, and topic ARN.

JSON

"MySubscription" : {
  "Type" : "AWS::SNS::Subscription",
  "Properties" : {
    "Endpoint" : "test@example.com",
    "Protocol" : "email",
    "TopicArn" : { "Ref" : "MySNSTopic" }
  }
}

YAML

MySubscription:
  Type: AWS::SNS::Subscription
  Properties:
    Endpoint: test@example.com
    Protocol: email
    TopicArn: !Ref 'MySNSTopic'

Create a subscription with optional attributes

The following example creates a subscription with a filter policy, delivery policy, and raw message delivery enabled.

Note

You can set subscription attributes only on standalone Amazon SNS subscriptions (not on subscriptions nested in topics).

YAML

AWSTemplateFormatVersion: 2010-09-09
Resources:
  CarSalesTopic:
    Type: 'AWS::SNS::Topic'
  ERPSubscription:
    Type: 'AWS::SNS::Subscription'
    Properties:
      TopicArn: !Ref CarSalesTopic
      Endpoint: !GetAtt 
        - ERPIntegrationQueue
        - Arn
      Protocol: sqs
      RawMessageDelivery: 'true'
  CRMSubscription:
    Type: 'AWS::SNS::Subscription'
    Properties:
      TopicArn: !Ref CarSalesTopic
      Endpoint: !GetAtt 
        - CRMIntegrationQueue
        - Arn
      Protocol: sqs
      RawMessageDelivery: 'true'
      FilterPolicy:
        buyer-class:
          - vip
  SCMSubscription:
    Type: 'AWS::SNS::Subscription'
    Properties:
      TopicArn: !Ref CarSalesTopic
      Endpoint: !Ref myHttpEndpoint
      Protocol: https
      DeliveryPolicy:
        healthyRetryPolicy:
          numRetries: 20
          minDelayTarget: 10
          maxDelayTarget: 30
          numMinDelayRetries: 3
          numMaxDelayRetries: 17
          numNoDelayRetries: 0
          backoffFunction: exponential
  ERPIntegrationQueue:
    Type: 'AWS::SQS::Queue'
    Properties: {}
  CRMIntegrationQueue:
    Type: 'AWS::SQS::Queue'
    Properties: {}
Parameters:
  myHttpEndpoint:
    Type: String

JSON

{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Resources": {
        "CarSalesTopic": {
            "Type": "AWS::SNS::Topic"
        },
        "ERPSubscription": {
            "Type": "AWS::SNS::Subscription",
            "Properties": {
                "TopicArn": {
                    "Ref": "CarSalesTopic"
                },
                "Endpoint": {
                    "Fn::GetAtt": ["ERPIntegrationQueue", "Arn"]
                },
                "Protocol": "sqs",
                "RawMessageDelivery": "true"
            }
        },
        "CRMSubscription": {
            "Type": "AWS::SNS::Subscription",
            "Properties": {
                "TopicArn": {
                    "Ref": "CarSalesTopic"
                },
                "Endpoint": {
                    "Fn::GetAtt": ["CRMIntegrationQueue", "Arn"]
                },
                "Protocol": "sqs",
                "RawMessageDelivery": "true",
                "FilterPolicy": {
                    "buyer-class": [
                        "vip"
                    ]
                }
            }
        },
        "SCMSubscription": {
            "Type": "AWS::SNS::Subscription",
            "Properties": {
                "TopicArn": {
                    "Ref": "CarSalesTopic"
                },
                "Endpoint": {
                    "Ref": "myHttpEndpoint"
                },
                "Protocol": "https",
                "DeliveryPolicy": {
                    "healthyRetryPolicy": {
                        "numRetries": 20,
                        "minDelayTarget": 10,
                        "maxDelayTarget": 30,
                        "numMinDelayRetries": 3,
                        "numMaxDelayRetries": 17,
                        "numNoDelayRetries": 0,
                        "backoffFunction": "exponential"
                    }
                }
            }
        },
        "ERPIntegrationQueue": {
            "Type": "AWS::SQS::Queue",
            "Properties": {}
        },
        "CRMIntegrationQueue": {
            "Type": "AWS::SQS::Queue",
            "Properties": {}
        }
    },
    "Parameters": {
        "myHttpEndpoint": {
            "Type": "String"
        }
    }
}

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