Module: OpenTelemetry::Resource::Detector::AWS::Lambda

Extended by:
Lambda
Included in:
Lambda
Defined in:
lib/opentelemetry/resource/detector/aws/lambda.rb

Overview

Lambda contains detect class method for determining Lambda resource attributes

Constant Summary collapse

RESOURCE =

Create a constant for resource semantic conventions

OpenTelemetry::SemanticConventions::Resource
'/tmp/.otel-aws-account-id'

Instance Method Summary collapse

Instance Method Details

#detect ⇒ Object 



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# File 'lib/opentelemetry/resource/detector/aws/lambda.rb', line 23

def detect
  # Return empty resource if not running on Lambda
  return OpenTelemetry::SDK::Resources::Resource.create({}) unless lambda_environment?

  resource_attributes = {}

  begin
    # Set Lambda-specific attributes from environment variables
    resource_attributes[RESOURCE::CLOUD_PROVIDER] = 'aws'
    resource_attributes[RESOURCE::CLOUD_PLATFORM] = 'aws_lambda'
    resource_attributes[RESOURCE::CLOUD_REGION] = ENV.fetch('AWS_REGION', nil)
    resource_attributes[RESOURCE::FAAS_NAME] = ENV.fetch('AWS_LAMBDA_FUNCTION_NAME', nil)
    resource_attributes[RESOURCE::FAAS_VERSION] = ENV.fetch('AWS_LAMBDA_FUNCTION_VERSION', nil)
    resource_attributes[RESOURCE::FAAS_INSTANCE] = ENV.fetch('AWS_LAMBDA_LOG_STREAM_NAME', nil)

    # Convert memory size to integer
    resource_attributes[RESOURCE::FAAS_MAX_MEMORY] = ENV['AWS_LAMBDA_FUNCTION_MEMORY_SIZE'].to_i if ENV['AWS_LAMBDA_FUNCTION_MEMORY_SIZE']

    # Read cloud.account.id from symlink created by the OTel Lambda extension
    begin
       = File.readlink(ACCOUNT_ID_SYMLINK_PATH)
      resource_attributes[RESOURCE::CLOUD_ACCOUNT_ID] = 
    rescue Errno::ENOENT, Errno::EINVAL
      OpenTelemetry.logger.debug('Lambda: cloud.account.id not available via symlink')
    end
  rescue StandardError => e
    OpenTelemetry.handle_error(exception: e, message: 'Lambda resource detection failed')
    return OpenTelemetry::SDK::Resources::Resource.create({})
  end

  # Filter out nil or empty values
  # Note: we need to handle integers differently since they don't respond to empty?
  resource_attributes.delete_if do |_key, value|
    value.nil? || (value.respond_to?(:empty?) && value.empty?)
  end

  OpenTelemetry::SDK::Resources::Resource.create(resource_attributes)
end