semantic-conventions/specification/resource/semantic_conventions/faas.md

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Function as a Service

type: faas

Description: A serverless instance.

Label Description Example Required
faas.name The name of the function being executed. my-function Yes
faas.id The unique name of the function being executed.
For example, in AWS Lambda this field corresponds to the ARN value, in GCP to the URI of the resource, and in Azure to the FunctionDirectory field.
arn:aws:lambda:us-west-2:123456789012:function:my-function Yes
faas.version The version string of the function being executed. 2.0.0 No
faas.instance The execution environment ID as a string. my-function:instance-0001 No

Note: The resource attribute faas.instance differs from the span attribute faas.execution. For more information see the Semantic conventions for FaaS spans.