AmazonLinux2023 is now the default

[sebsto]

Starting June, 20 2026, Amazon Linux 2 has reached end of support life.
The Swift Lambda Runtime plugins now use Amazon Linux 2023 for cross compiling code.

Warning

When you compile on Amazon Linux 2023, you must deploy on Amazon Linux 2023 too

When using the console

When using the AWS CLI

aws lambda create-function \
    --function-name MySwiftFunction \
    --runtime provided.al2023 \
    --role "$role_arn" \ // replace with the IAM role ARN to pass to your function
    --handler bootstrap \
    --architectures arm64 \
    --zip-file "fileb://MySwiftFunction.zip"

When using SAM

Resources:
  APIGatewayLambda:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: APIGatewayLambda.zip
      Timeout: 60
      Handler: swift.bootstrap  # ignored by the Swift runtime
      Runtime: provided.al2023
      MemorySize: 128
      Architectures:
        - arm64

When using the AWS CDK

  const lambdaFunction = new lambda.Function(this, 'SwiftLambdaFunction', {
    runtime: lambda.Runtime.PROVIDED_AL2023,
    architecture: lambda.Architecture.ARM_64,
    handler: 'bootstrap',
    code: lambda.Code.fromAsset('APIGatewayLambda.zip'),
    memorySize: 128,
    timeout: cdk.Duration.seconds(30),
    environment: {
      LOG_LEVEL: 'debug',
    },
  });