Deploying a Serverless Application Using AWS Lambda, API Gateway, and DynamoDB

Create a DynamoDB table with the following settings:

• Table Name: Quotes
• Partition Key Name: quote with type String
• Sort Key Name: author with type String
• Table settings: Customize settings
• Table class: DynamoDB Standard
• Read/write Capacity mode: Provisioned
• Read Capacity Auto scaling: On
• Minimum capacity units: 1, Maximum capacity units: 5, Target utilization (%) : 20
• Write capacity Auto scaling: On
• Minimum capacity units: 1, Maximum capacity units: 5, Target utilization (%) : 20
• Encryption at rest: AWS managed key

Create two different Lambda functions to leverage with Amazon API Gateway.

The code for each function is provided to you, so you do not need to type these manually.

PutQuotes Function

• Function Name: PutQuotes
• Timeout: 1 Minute
• Environment Variable Key: TABLE_NAME
• Environment Variable Value: Quotes
• New Execution Role Name: PutQuotesRole
• Permissions Template: Simple microservice permissions (AWS sample)
• Python Code

GetQuotes Function

• Function Name: GetQuotes
• Timeout: 1 Minute
• Environment Variable Key: TABLE_NAME
• Environment Variable Value: Quotes
• New Execution Role Name: GetQuotesRole
• Permissions Template: Simple microservice permissions (AWS sample)
• Python Code

In Amazon API Gateway create a new API resource with the following information:

• API Name: Quotes
• API Type: Regional

Now, create two new resources for use within the application. These resources should be created at the root (Example: /PutQuotes)

Resource: PutQuotes

• Resource Name: PutQuotes
• Method Type: ANY
• Integration Type: Lambda Function
• Lambda Proxy Integration: Disabled
• Lambda Function: PutQuotes

Resource: GetQuotes

• Resource Name: GetQuotes
• Method Type: ANY
• Integration Type: Lambda Function
• Lambda Proxy Integration: Enabled
• Lambda Function: GetQuotes

This should be created while you create the Lambda functions.

1. PutQuoutes Role Name: PutQuotesRole
2. GetQuotes Role Name: GetQuotesRole

Each Role needs the ability to write to Amazon CloudWatch Logs, and it needs to be able to read and write to your Amazon DynamoDB Quotes table.

• Deploy the Quotes REST API to a new stage.
• Under API Gateway Settings, set up a CloudWatch log role using the ARN from the IAM role that was created for you called OurApiGatewayToCloudWatchLogsRole
• Under Logs and tracing settings of the Quotes REST API, set CloudWatch logs to Full requests and response logs and Enable X-Ray tracing.
• Navigate to the invoke URL provided and append /PutQuotes to the end and hit Enter.
• You will receive a message saying Item successfully written to DynamoDB if working correctly.
• Refresh the page several times and verify that the function is working as intended by exploring the DynamoDB table items.
• Replace the /PutQuotes resource with /GetQuotes in the Invoke URL.
• You should receive a simple message with a quote! Refresh to randomly select quotes from the database.