Migration path to SST v3 for stacks using CDK constructs

[adolfogc]

Hi,

We currently use SST v2 in combination with some CDK constructs to deploy various lambda functions developed in C++.

For example:

// ...

const myApiKeySecret = new Config.Secret(stack, "MY_API_KEY");

const myApiKeyParameterName = `/sst/${app.name}/${app.stage}/Secret/${myApiKeySecret.name}/value`;

const myApiKeyParameter =
  StringParameter.fromSecureStringParameterAttributes(
    stack,
    "MY_API_KEY_PARAMETER",
    { parameterName: myApiKeyParameterName, version: 1 }
  );

const myLambdaFunction = new Function(stack, "FoobarLambda", {
  runtime: Runtime.PROVIDED_AL2023,
  architecture: Architecture.ARM_64,
  memorySize: 512,
  timeout: Duration.seconds(10),
  handler: "foobar", // not actually used
  code: Code.fromBucket(myLambdaCodeZip.bucket, myLambdaCodeZip.s3ObjectKey),
  layers: [myLambdaLayer],
  environment: {
    LD_PRELOAD: "libmimalloc.so",
    API_KEY_PARAMETER_NAME: myApiKeyParameterName,
  },
});

myApiKeyParameter.grantRead(myLambdaFunction);

We understand that Ion/SST v3 (https://ion.sst.dev/docs/) will drop CDK support, so we were wondering if this setup will be possible with the newer SST.

[jayair]

It supports https://ion.sst.dev/docs/component/aws/function/#runtime provided.al2023.

Is that what you are looking for?

[adolfogc]

Hi @jayair, thank you for your reply, yes, that is required, but it is not clear to me how to specify the function and the layer using existing ZIP files (as with Code.fromBucked in the example above).