Export RDS snapshot to s3 Using Cloudformation - amazon-web-services

Question

I want to export RDS snapshot to s3 using cloudformation which will trigger lambda function. But i'm kind of new to this. Can someone please help me out. I've already written the script for Lambda and SNS but i'm confused that how can I do export RDS snapshot to S3 using cloudformation. I'm attaching my file of Triggering Lambda from SNS. Help will be appreciated. Thanks.
AWSTemplateFormatVersion: '2010-09-09'
Transform: 'AWS::Serverless-2016-10-31'
Description: >
example-lambda-sns
Example CloudFormation template to subscribe a lambda to an SNS Topic.
Resources:
ExampleTopic:
Type: AWS::SNS::Topic
Properties:
DisplayName: !Sub 'example-sns-topic'
TopicName: !Sub 'example-sns-topic'
Subscription:
- Protocol: lambda
Endpoint: !GetAtt ExampleFunction.Arn
ExampleFunction:
Type: AWS::Serverless::Function
Properties:
FunctionName: mylambdafunction
Description: mylambdafunction
Handler: index.handler
Runtime: nodejs14.x
Role: arn:aws:iam::48
CodeUri: 's3://testing/tes.zip'
ExampleFunctionInvokePermission:
Type: 'AWS::Lambda::Permission'
Properties:
Action: 'lambda:InvokeFunction'
FunctionName: !Ref ExampleFunction
Principal: sns.amazonaws.com
ExampleTopicPolicy:
Type: 'AWS::SNS::TopicPolicy'
Properties:
Topics:
- !Ref ExampleTopic
PolicyDocument:
Version: '2012-10-17'
Statement:
- Effect: Allow
Action: 'sns:Publish'
Resource: !Ref ExampleTopic
Principal:
AWS: '*'
Condition:
ArnLike:
AWS:SourceArn: !Sub 'arn:aws:*:*:${AWS::AccountId}:*'```

Answer 1

following is sample example for lambda function. which will get trigger from sns. SNS will receive notification when snapshot is created.
import json
import boto3
import uuid
import datetime
import os
def lambda_handler(event, context):
snapshotarn = event['Records'][0]['Sns']['Message']
snapshotarn=snapshotarn.split()
snapshotarn=snapshotarn[10].replace('.','')
print(snapshotarn)
rds=boto3.client('rds')
export=rds.start_export_task(
ExportTaskIdentifier='export'+'-'+uuid.uuid4().hex,
SourceArn=snapshotarn,
S3BucketName=os.environ.get('S3_BUCKET_NAME'),
IamRoleArn=os.environ.get('IAM_ROLE_FOR_EXPORT_TASK'),
KmsKeyId=os.environ.get('KMS_KEY_ID'),
S3Prefix=os.environ.get('S3_PREFIX'),
)
status={
'ExportTaskIdentifier':export['ExportTaskIdentifier'],
'S3Bucket':export['S3Bucket'],
'S3Prefix':export['S3Prefix'],
'Status':export['Status'],
'ResponseMetadata':export['ResponseMetadata'],
}
print(status)
# TODO implement
return {
'statusCode': 200,
'body': status
}