[Announcement] .NET Core 3.1 Runtime Deprecation

[mildaniel]

SAM CLI will stop supporting .NET Core 3.1 by May 3rd, 2023.

This runtime is no longer supported by AWS Lambda, and it is on the deprecation path. Users are not able to deploy/update these functions anymore.

What is deprecation schedule?

After May 3rd 2023, SAM CLI will no longer allow customers to use deprecated runtimes within the CLI.

Am I impacted by this deprecation?

You are impacted by this if you are still using the .NET Core 3.1 runtime. The recommendation is to upgrade these runtimes to a newer version which is supported by AWS Lambda.

For more information about supported runtimes by AWS Lambda, please check https://docs.aws.amazon.com/lambda/latest/dg/runtime-support-policy.html

AWS Lambda Builders will stop support using it as a library for .NET Core 3.1, see aws/aws-lambda-builders#479 for more details.

[moelasmar]

Lambda already finished the phase 2 deprecation for .Net Core 3.1 on May 3, 2023 (Get more info about lambda runtimes deprecation policy here). SAM CLI also deprecated supporting .Net Core 3.1 in the latest release 1.89.0

[github-actions]

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