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Lambda Function

AWS Lambda is a serverless compute service that runs your code in response to events and automatically manages the underlying compute resources for you. A Lambda function is the fundamental execution unit: it contains your application code, runtime settings and configuration such as memory, timeout and environment variables. For a full description see the official AWS documentation: https://docs.aws.amazon.com/lambda/latest/dg/welcome.html

Terrafrom Mappings:

  • aws_lambda_function.arn
  • aws_lambda_function_event_invoke_config.id
  • aws_lambda_function_url.function_arn

Supported Methods​

  • GET: Get a lambda function by name
  • LIST: List all lambda functions
  • SEARCH: Search for lambda functions by ARN

iam-role​

Each Lambda function is executed with an IAM role (its “execution role”). Overmind links the function to that iam-role so you can immediately see what permissions the function has and what downstream resources could be affected by its actions.

s3-bucket​

A Lambda function can be triggered by S3 events (e.g. object creation) or load its deployment artefact from an S3 bucket. Overmind links the function to any referenced s3-bucket so you can assess event-driven couplings and code-package storage risks.

sns-topic​

Lambda functions may subscribe to, or publish messages to, Amazon SNS topics. When a function is configured as an SNS subscription target, Overmind links it to the relevant sns-topic so that you can trace message flows and understand failure blast-radius.

sqs-queue​

Lambda can poll SQS queues as an event source. Overmind establishes a link between the function and the sqs-queue it consumes so that queue backlogs, permissions and dead-letter configurations are visible in the dependency graph.

lambda-function​

A Lambda function can synchronously or asynchronously invoke another Lambda function (for example, in micro-service fan-out patterns). Overmind links calling and called lambda-function resources to expose these internal service dependencies.

elbv2-target-group​

Application Load Balancers (ALB) can forward requests to Lambda targets via an ELBv2 target group. Overmind links the function to any associated elbv2-target-group, allowing you to see inbound HTTP pathways and evaluate scaling or security implications.