# Lambda Function

# TODO $6$: Create a Lambda function using the Lambda deployment package stored in S$3.$

# $-$ Set up the Lambda function in PrivateSubnet$1$ to restrict internet access. $($Properties : VpcConfig $->$ SubnetIds$)$

# $-$ Use the default Security group of the VPC$.($Properties : VpcConfig $->$ SecurityGroupIds$)$

# $-$ Attach the "LabRole" IAM role to grant necessary permissions. $($Properties : Role$)$

# $-$ Add environment variables: db$\_$user, host, and password to connect to the RDS instance. $($Properties : Variables$)$

# $-$ Attach the Lambda Layer for MySQL packages to enable database interaction within the function. $($Properties : Layers$)$

# $-$ Lambda Handler is the lambda file name combined with function name. $($Properties : Handler$)$

# $-$ Lambda code from S$3$ Bucket. $($Properties : Code$)$

# $-$ Keep Runtime environment as python$3\mathrm{.}9.($Properties : Runtime$)$

Keeping the formatting below I am running into Invalid template property or properties $[$BooksUpdater$,$ BooksHandler, BooksBucket, LambdaLayer, LambdaInvokePermission$]$ this error the portion of the code is here below

# todo $6$

BooksHandler:

$$Type: AWS::Lambda::Function

$$Properties:

$$FunctionName: $!$Sub $\text{'}$$$\{$StageName$\}-$BooksHandler'

$$Runtime: python$3\mathrm{.}9$

$$Handler: lambda.lambda$\_$handler$$

$$Role: $!$Sub 'arn:aws:iam::$605635394551$:role$/$LabRole$\text{'}$

$$Code:

$$S$3$Bucket: $!$Ref S$3$PackageBucket

$$S$3$Key: $!$Ref LambdaFunctionFileName

$$VpcConfig:

$$SubnetIds:

$-!$Ref PrivateSubnet$1$

$$SecurityGroupIds:

$-!$Ref MyRDSSecurityGroup

$$Environment:

$$Variables:

$$db$\_$user: $!$Ref DBUserName

$$host: $!$GetAtt MyRDSInstance.Endpoint.Address

$$password: $!$Ref DBPassword

$$Layers:

$-!$Ref LambdaLayer

BooksBucket:

$$Type: AWS::S$3$::Bucket

$$Properties:

$$BucketName: $!$Sub $\text{'}$$$\{$StageName$\}-$$$\{$BooksBucketName$\}\text{'}$

$$OwnershipControls:

$$Rules:

$-$ ObjectOwnership: ObjectWriter

$$PublicAccessBlockConfiguration:

$$BlockPublicAcls: false

$$BlockPublicPolicy: false

$$IgnorePublicAcls: false

$$RestrictPublicBuckets: false

$$NotificationConfiguration:

$$EventBridgeConfiguration:

$$EventBridgeEnabled: true

BooksUpdater:

$$Type: AWS::Events::Rule

$$Properties:

$$Name: $!$Sub $\text{'}$$$\{$StageName$\}-$BooksUpdater'

$$EventPattern:$$

$$source:$$

$-$ aws.s$3$

$$detail$-$type:$$

$-$ "Object Created"

$$detail:

$$bucket:

$$name:$$

$-!$Sub $\text{'}$$$\{$StageName$\}-$$$\{$BooksBucketName$\}\text{'}$

$$object:

$$key:

$-$ suffix: $".$json"

$$State: ENABLED

$$Targets:

$-$ Arn: $!$GetAtt BooksHandler.Arn

$$Id: "BooksHandlerTarget"

LambdaInvokePermission:

$$Type: AWS::Lambda::Permission

$$Properties:

$$FunctionName: $!$Ref BooksHandler

$$Action: lambda:InvokeFunction

$$Principal: events.amazonaws.com

$$SourceArn: $!$GetAtt BooksUpdater.Arn

$$

LambdaLayer:

$$Type: AWS::Lambda::LayerVersion

$$Properties:

$$CompatibleRuntimes:$$

$-$ python$3\mathrm{.}9$

$$Content:$$

$$S$3$Bucket: $!$Ref S$3$PackageBucket

$$S$3$Key: $!$Ref LambdaLayerFileName

$$Description: "Layer for MySQL Packages"

$$LayerName: $!$Sub $\text{'}$$$\{$StageName$\}-$My$-$Sql$-$Layer'

Outputs:

$$VPCId:

$$Description: $"$VPC ID$"$

$$Value: $!$Ref MyVPC

$$PublicSubnetId:

$$Description: "Public Subnet ID$"$

$$Value: $!$Ref PublicSubnet

$$PrivateSubnet$1$Id:

$$Description: "Private Subnet $1$ ID$"$

$$Value: $!$Ref PrivateSubnet$1$

$$PrivateSubnet$2$Id:

$$Description: "Private Subnet $2$ ID$"$

$$Value: $!$Ref PrivateSubnet$2$

$$RDSInstanceEndpoint:

$$Description: $"$RDS Instance Endpoint"

$$Value: $!$GetAtt MyRDSInstance.Endpoint.Address

$$RDSInstancePort:

$$Description: $"$RDS Instance Port"

$$Value: $!$GetAtt MyRDSInstance.Endpoint.Port

$$FrontEndInstancePublicIp:

$$Description: Public IP of the Frontend EC$2$ instance

$$Value: $!$GetAtt FrontEndEC$2$Instance.PublicIp