Serverless function without X-Ray tracing

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Metadata

Id: dc1ab429-1481-4540-9b1d-280e3f15f1f8

Cloud Provider: AWS

Platform: CloudFormation

Severity: Low

Category: Observability

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Description

Serverless functions must have AWS X-Ray tracing enabled so execution paths, errors, and latency are observable for incident response and performance troubleshooting. For AWS Serverless Application Model functions (AWS::Serverless::Function), the Properties.Tracing attribute must be defined and set to Active. Resources missing the Tracing property or with Tracing set to any other value will be flagged.

Secure configuration example:

MyFunction:
  Type: AWS::Serverless::Function
  Properties:
    Handler: index.handler
    Runtime: nodejs14.x
    Tracing: Active

Compliant Code Examples

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: AWS SAM template with a simple API definition
Resources:
  Function3:
    Type: AWS::Serverless::Function
    Properties:
      PackageType: Image
      ImageUri: account-id.dkr.ecr.region.amazonaws.com/ecr-repo-name:image-name
      ImageConfig:
        Command:
          - "app.lambda_handler"
        EntryPoint:
          - "entrypoint1"
        WorkingDirectory: "workDir"
      Tags:
        - Key: Type
          Value: AWS Serverless Function
      Tracing: Active

Non-Compliant Code Examples

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: AWS SAM template with a simple API definition
Resources:
  Function2:
    Type: AWS::Serverless::Function
    Properties:
      PackageType: Image
      ImageUri: account-id.dkr.ecr.region.amazonaws.com/ecr-repo-name:image-name
      ImageConfig:
        Command:
          - "app.lambda_handler"
        EntryPoint:
          - "entrypoint1"
        WorkingDirectory: "workDir"
      Tags:
        - Key: Type
          Value: AWS Serverless Function
      Tracing: PassThrough

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: AWS SAM template with a simple API definition
Resources:
  Function1:
    Type: AWS::Serverless::Function
    Properties:
      PackageType: Image
      ImageUri: account-id.dkr.ecr.region.amazonaws.com/ecr-repo-name:image-name
      ImageConfig:
        Command:
          - "app.lambda_handler"
        EntryPoint:
          - "entrypoint1"
        WorkingDirectory: "workDir"
      Tags:
        - Key: Type
          Value: AWS Serverless Function