AWS Cloud Quest: Deploying APIs Gradually Study Note

This is the DIY challenge of the Deploying APIs Gradually task in AWS Cloud Quest.

DIY Steps:

1. Change app.py to the following
   

   import json
   def lambda_handler(event, context):
       return {
           "statusCode": 200,
           "body": json.dumps({
               "message": "diy",
               "new_attribute": "I am a canary deployment"
           }),
       }
   

2. Change SAM template template.yaml DeploymentPreference to Linear10PercentEvery1Minute
   

   AWSTemplateFormatVersion: '2010-09-09'
   Transform: AWS::Serverless-2016-10-31
   Description: >
     MyAPI
   
     Sample SAM Template for MyAPI
   
   # More info about Globals: https://github.com/awslabs/serverless-application-model/blob/master/docs/globals.rst
   Globals:
     Function:
       Timeout: 3
   
   Resources:
     HelloWorldFunction:
       Type: AWS::Serverless::Function # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
       Properties:
         CodeUri: hello_world/
         Handler: app.lambda_handler
         Runtime: python3.7
         AutoPublishAlias: diy
         DeploymentPreference:
           Type: Linear10PercentEvery1Minute
         Architectures:
           - x86_64
         Events:
           HelloWorld:
             Type: Api # More info about API Event Source: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#api
             Properties:
               Path: /hello
               Method: get
   
   Outputs:
     # ServerlessRestApi is an implicit API created out of Events key under Serverless::Function
     # Find out more about other implicit resources you can reference within SAM
     # https://github.com/awslabs/serverless-application-model/blob/master/docs/internals/generated_resources.rst#api
     HelloWorldApi:
       Description: "API Gateway endpoint URL for Prod stage for Hello World function"
       Value: !Sub "https://${ServerlessRestApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/hello/"
     HelloWorldFunction:
       Description: "Hello World Lambda Function ARN"
       Value: !GetAtt HelloWorldFunction.Arn
     HelloWorldFunctionIamRole:
       Description: "Implicit IAM Role created for Hello World function"
       Value: !GetAtt HelloWorldFunctionRole.Arn
   

3. SAM build and deploy
   

   sam build
   yes | sam deploy