Question

A developer is authoring an AWS SAM template that defines eight Lambda functions. Every function must use the same runtime (python3.12), a 512 MB memory setting, a 30-second timeout, and the same set of environment variables pointing to a shared configuration table. The developer wants to avoid repeating these identical properties in each function's definition and reduce the chance of configuration drift between functions. What is the MOST efficient way to accomplish this within the SAM template?

Accepted Answer

Define the shared properties once under the template's Globals section for the Function resource type, allowing individual functions to override values when needed.

Answer

Create a nested CloudFormation stack for each Lambda function and pass the shared values in as stack parameters.

Answer

Store the runtime, memory, timeout, and environment variables in SSM Parameter Store and reference each parameter individually in all eight function definitions.

Answer

Use a CloudFormation Mappings section and add a Fn::FindInMap lookup to each of the eight function definitions.