Lambda Runtime Version ARNs?

[DilLip-Chowdary-Codes]

Describe the feature

AWS Lambda functions as a runtime management configuration that allows us to customize the runtime version for the lambda function. Still, there is no official source for referring to the runtime version arns.

In the Lambda runtime updates blog, you've mentioned looking at cloud watch logs to get the previous runtime version arn

Use Case

To get the list of versions for the runtime, it could be better if we've either a blog or provide API to list those versions

we can get previous versions from Cloudwatch, but what if I didn't invoke the lambda function in the previous version
running period, and now my lambda function runtime version was updated to the latest?

Proposed Solution

Provide the list of runtime versions available

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

SDK version used

aws-cli/1.27.143 Python/3.8.10 Linux/5.8.0-63-generic botocore/1.29.143

Environment details (OS name and version, etc.)

NA

[tim-finnigan]

Hi @DilLip-Chowdary-Codes thanks for reaching out. Does the list_versions_by_function command accomplish what you are trying to do? There is also a paginator to help get the full results.

[DilLip-Chowdary-Codes]

@tim-finnigan These return functions versions, but I'm expecting a runtime version list

[tim-finnigan]

Hi @DilLip-Chowdary-Codes thanks for following up. The list_versions_by_function command returns a RuntimeVersionConfig dict which includes a RuntimeVersionArn. Does that address your use case? For tracking runtime version changes you can also refer to the CloudWatch logs as documented here.

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[DilLip-Chowdary-Codes]

@tim-finnigan tqs for the response, But I'm expecting some kind of API or Doc which provides a list of all version ARNs

With Lambda list_versions_by_function or CloudWatch logs as documented here, we only get few runtime version ARNs those we've used, but we want all the version ARNs list

[tim-finnigan]

Hi thanks for following up. I reached out to the Lambda team to see if they would support this. Please refer to aws/aws-sdk#552 for updates going forward, as that repository is used to track cross-SDK issues that involve service APIs.