Blog-backend-infrastructure

• Blog-backend-infrastructure
  • Description
  • Technology used
  • Type
  • More information
    • Review QA
    • Test with SAM
    • Additional links

Description

This is the public infrastructure code of my blog (https://www.playingaws.com). This project is an example of a CDK project with 2 stacks: the infrastructure (backend) and the CICD to automate the infrastructure deployment.

Technology used

CDK project using TypeScript. It contains 2 stacks:

• Backend: This stack contains the infrastructure to be deployed
  • API Gateway using a custom domain (api.playingaws.com)
  • Lambda: subscription and contact
  • DynamoDB
  • CloudWatch: lambda alarm and dashboard of lambdas
• CICD: This stack contains the automation of the backend infrastructure
  • CodePipeline with 2 stages
    • source: CodeCommit with GitHub
    • build: CodeBuild (executes terraform apply)
  • S3 (as artifactory in CodePipeline)

Architecture diagram - autogenerated with cdk-dia

• npm run dia
• 

Type

Public code

More information

Review QA

npm run lint && npm run test

Test with SAM

1. Download and run docker image of dynamodb-local

   docker pull amazon/dynamodb-local
   docker run -p 8000:8000 amazon/dynamodb-local

2. Create dynamodb-local tables - review the template.yaml because the ID is going to change

   aws dynamodb create-table --table-name bloginfrastructuresubscriptiondbF44CF6DE --attribute-definitions AttributeName=email,AttributeType=S --key-schema AttributeName=email,KeyType=HASH --provisioned-throughput ReadCapacityUnits=1,WriteCapacityUnits=1 --endpoint-url http://localhost:8000
   aws dynamodb create-table --table-name bloginfrastructurecontactdbA1E13C61 --attribute-definitions AttributeName=name,AttributeType=S --key-schema AttributeName=name,KeyType=HASH --provisioned-throughput ReadCapacityUnits=1,WriteCapacityUnits=1 --endpoint-url http://localhost:8000

3. Update lambda code to change the endpoint:

   const dbClient = process.env.AWS_SAM_LOCAL ? new DynamoDBClient({ endpoint: 'http://docker.for.mac.localhost:8000/', }) : new DynamoDBClient();

4. Generate the YAML file that SAM needs

   cdk synth blog-backend-infrastructure --no-staging > template.yml

5. Run SAM tests

   sam local invoke blog-backend-infrastructure-contact-lbd -e tests/events/contact.json
   sam local invoke blog-backend-infrastructure-subscription-lbd -e tests/events/subscription.json

6. Review database records

   aws dynamodb scan --table-name bloginfrastructuresubscriptiondbF44CF6DE --endpoint-url http://localhost:8000
   aws dynamodb scan --table-name bloginfrastructurecontactdbA1E13C61 --endpoint-url http://localhost:8000

Additional links

• How to create infrastructure with CDK here.
• How to add CI/CD to my CDK project here.
• How to create serverless applications with CDK and SAM here
• How I decided on the technology behind the blog here.
• API CDK v2 TypeScript: here