Option 2: Import existing resources into SAM Template using IaC Generator

Let's imagine you have a SAM template to your App, and for some reason you created manually resources. And you want to manage those resources created already into your template. 

• Go to CloudFormation -> IaC Generator. Click Scan specific resources.
   
•  Search for DynamoDB. Click on Scan.
   
• After the scan is finished. Click Create template.
  
• Click Update the template for an existing stack, choose the SAM stack.
  
• Then enter a template name, deletion policy and update policy. Click on next.
  
• Choose the table that you want to import. Click on next and Next again.
  
• Then you can review and click Create template.
  
• Review the template and Click on Import to stack.
  
• Review and click Next.
  
• Review and click Import resources.
  
• The resource will be imported to the SAM template.
  
  

Now you will have the CloudFormation template updated, but let's update our local code to continue developing.

# Get the template and process it to extract the YAML content
aws cloudformation get-template --stack-name test --output json | jq -r '.TemplateBody' > template-updated.yaml

 

Update your code with Transform

AWSTemplateFormatVersion: '2010-09-09'

Transform: AWS::Serverless-2016-10-31

Description: SAM Template with DynamoDB Table and SNS Topic

Resources:

SecondaryTable:

Metadata:

SamResourceId: "SecondaryTable"

Type: "AWS::DynamoDB::Table"

DeletionPolicy: "Retain"

Properties:

BillingMode: "PAY_PER_REQUEST"

TableName: "SecondaryTable"

AttributeDefinitions:

- AttributeName: "id"

AttributeType: "S"

KeySchema:

- KeyType: "HASH"

AttributeName: "id"

DynamoDBTablePrimaryTable:

UpdateReplacePolicy: "Retain"

Type: "AWS::DynamoDB::Table"

DeletionPolicy: "Retain"

Properties:

SSESpecification:

SSEEnabled: false

TableName: "PrimaryTable"

AttributeDefinitions:

- AttributeType: "S"

AttributeName: "id"

ContributorInsightsSpecification:

Enabled: false

BillingMode: "PAY_PER_REQUEST"

PointInTimeRecoverySpecification:

PointInTimeRecoveryEnabled: false

WarmThroughput:

ReadUnitsPerSecond: 12000

WriteUnitsPerSecond: 4000

KeySchema:

- KeyType: "HASH"

AttributeName: "id"

DeletionProtectionEnabled: false

TableClass: "STANDARD"

Tags: []

TimeToLiveSpecification:

Enabled: false

MySNSTopic:

Properties:

TopicName: "MyNotificationTopic"

Metadata:

SamResourceId: "MySNSTopic"

Type: "AWS::SNS::Topic"

Run sam build and sam deploy.