appsync-aurora-serverless-v2-rds-data-api-cdk: GraphQL over Aurora with zero Lambda - #3307
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…-relational pattern AWS AppSync GraphQL API backed by Amazon Aurora Serverless v2 via the RDS Data API, with zero AWS Lambda functions. APPSYNC_JS resolvers use the rds module select/insert helpers with parameterised statements. Least-privilege IAM scoped to the cluster and secret ARNs, storage encrypted, isolated VPC. Deploy-tested live in us-west-2: createTodo mutation and listTodos query round-trip through AppSync to Aurora Serverless v2 verified end to end. Aurora PostgreSQL pinned to 16.8 (GA).
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Description
An AWS AppSync GraphQL API reads and writes an Amazon Aurora Serverless v2 (PostgreSQL) database directly through the RDS Data API, with no AWS Lambda functions in the request path.
Architecture
GraphQL client -> AWS AppSync GraphQL API (API key auth, APPSYNC_JS resolvers) -> RDS Data API data source (HTTPS SQL, no AWS Lambda, no VPC-attached compute) -> Amazon Aurora Serverless v2 (PostgreSQL, Data API enabled, encrypted at rest). The admin credential lives in AWS Secrets Manager. Resolvers issue parameterised SQL via the @aws-appsync/utils/rds select/insert helpers. Removing any one of AWS AppSync, the RDS Data API, or Amazon Aurora Serverless v2 breaks the architecture.
Deployed and Tested
Deployed in us-west-2 and tested end-to-end: created the todos table via the RDS Data API, then ran a createTodo mutation followed by a listTodos query through the GraphQL endpoint and confirmed the row round-tripped from Amazon Aurora Serverless v2.
Checklist