AWS::S3::Bucket NotificationConfiguration

Describes the notification configuration for an Amazon S3 bucket.

Note

If you create the target resource and related permissions in the same template, you might have a circular dependency.

For example, you might use the AWS::Lambda::Permission resource to grant the bucket permission to invoke an AWS Lambda function. However, AWS CloudFormation can't create the bucket until the bucket has permission to invoke the function (AWS CloudFormation checks whether the bucket can invoke the function). If you're using Refs to pass the bucket name, this leads to a circular dependency.

To avoid this dependency, you can create all resources without specifying the notification configuration. Then, update the stack with a notification configuration.

For more information on permissions, see AWS::Lambda::Permission and Granting Permissions to Publish Event Notification Messages to a Destination.

Syntax

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

JSON

{
  "LambdaConfigurations" : [ LambdaConfiguration, ... ],
  "QueueConfigurations" : [ QueueConfiguration, ... ],
  "TopicConfigurations" : [ TopicConfiguration, ... ]
}

YAML

  LambdaConfigurations: 
    - LambdaConfiguration
  QueueConfigurations: 
    - QueueConfiguration
  TopicConfigurations: 
    - TopicConfiguration

Properties

LambdaConfigurations

Describes the AWS Lambda functions to invoke and the events for which to invoke them.

Required: No

Type: List of LambdaConfiguration

Update requires: No interruption

QueueConfigurations

The Amazon Simple Queue Service queues to publish messages to and the events for which to publish messages.

Required: No

Type: List of QueueConfiguration

Update requires: No interruption

TopicConfigurations

The topic to which notifications are sent and the events for which notifications are generated.

Required: No

Type: List of TopicConfiguration

Update requires: No interruption

Examples

Receive S3 bucket notifications to an SNS topic

The following example template shows an Amazon S3 bucket with a notification configuration that sends an event to the specified SNS topic when S3 has lost all replicas of an object.

JSON

{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Resources": {
        "S3Bucket": {
            "Type": "AWS::S3::Bucket",
            "Properties": {
                "AccessControl": "Private",
                "NotificationConfiguration": {
                    "TopicConfigurations": [
                        {
                            "Topic": "arn:aws:sns:us-east-1:123456789012:TestTopic",
                            "Event": "s3:ReducedRedundancyLostObject"
                        }
                    ]
                }
            }
        }
    },
    "Outputs": {
        "BucketName": {
            "Value": {
                "Ref": "S3Bucket"
            },
            "Description": "Name of the sample Amazon S3 bucket with a notification configuration."
        }
    }
}

YAML

AWSTemplateFormatVersion: 2010-09-09
Resources:
  S3Bucket:
    Type: 'AWS::S3::Bucket'
    Properties:
      AccessControl: Private
      NotificationConfiguration:
        TopicConfigurations:
          - Topic: 'arn:aws:sns:us-east-1:123456789012:TestTopic'
            Event: 's3:ReducedRedundancyLostObject'
Outputs:
  BucketName:
    Value: !Ref S3Bucket
    Description: Name of the sample Amazon S3 bucket with a notification configuration.