Has anyone used the experimental lambda edge function Gettin Serverless Stack #help

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Has anyone used the experimental lambda edge funct...

# help

thdxr

10/04/2021, 10:57 PM

Has anyone used the experimental lambda edge function? Getting some vague immediate errors

Frank

10/04/2021, 11:14 PM

After the work on NextjsSite, I have some experience w/ it.

thdxr

10/04/2021, 11:15 PM

I was trying the

experimental

version and it's failing with

Error: ENOENT: no such file or directory, copyfile '/home/thdxr/dev/projects/blog/.build/lib/nodejs-entrypoint.js' -> '/home/thdxr/dev/projects/blog/.build/lib/edge-function/__entrypoint__.js'

thdxr

10/04/2021, 11:16 PM

I'm working around it by using the normal lambda function but then have to setup all the stuff around it manually

thdxr

10/04/2021, 11:16 PM

like how you have it in the nextjs construct

Frank

10/04/2021, 11:17 PM

r u deploying to us-east-1?

thdxr

10/04/2021, 11:18 PM

I just switched it to that

Frank

10/04/2021, 11:19 PM

ah i see.. yeah if u r deploying to us-east-1, it’s better to use the Lambda function directly

thdxr

10/04/2021, 11:19 PM

We have this code in our docs

Copy code

import { LambdaEdgeEventType, experimental } from "@aws-cdk/aws-cloudfront";

const edgeFunc = new experimental.EdgeFunction(this, "MyFunction", {
  runtime: lambda.Runtime.NODEJS_12_X,
  handler: "lambda.handler",
  code: lambda.Code.fromAsset("path/to/dir"),
  stackId: `${scope.logicalPrefixedName("edge-lambda")}`,
});

new StaticSite(this, "Site", {
  path: "path/to/src",
  cfDistribution: {
    defaultBehavior: {
      edgeLambdas: [
        {
          functionVersion: edgeFunc.currentVersion,
          eventType: LambdaEdgeEventType.VIEWER_RESPONSE,
        },
      ],
    },
  },
});

I don't think it works for me

thdxr

10/04/2021, 11:19 PM

I tried it in us-east-2

Frank

10/04/2021, 11:23 PM

hmm where do u think

lib/nodejs-entrypoint.js'

comes from?

thdxr

10/04/2021, 11:23 PM

I think maybe they spawn a custom resource to create the function cross region:

Copy code

Error: ENOENT: no such file or directory, copyfile '/home/thdxr/dev/projects/blog/.build/lib/nodejs-entrypoint.js' -> '/home/thdxr/dev/projects/blog/.build/lib/edge-function/__entrypoint__.js'
    at Object.copyFileSync (node:fs:2792:3)
    at new CustomResourceProvider (/home/thdxr/dev/projects/blog/node_modules/@aws-cdk/core/lib/custom-resource-provider/custom-resource-provider.ts:86:8)
    at Function.getOrCreateProvider (/home/thdxr/dev/projects/blog/node_modules/@aws-cdk/core/lib/custom-resource-provider/custom-resource-provider.ts:69:10)
    at Function.getOrCreate (/home/thdxr/dev/projects/blog/node_modules/@aws-cdk/core/lib/custom-resource-provider/custom-resource-provider.ts:61:17)
    at EdgeFunction.createCrossRegionArnReader (/home/thdxr/dev/projects/blog/node_modules/@aws-cdk/aws-cloudfront/lib/experimental/edge-function.ts:162:49)
    at EdgeFunction.createCrossRegionFunction (/home/thdxr/dev/projects/blog/node_modules/@aws-cdk/aws-cloudfront/lib/experimental/edge-function.ts:144:26)
    at new EdgeFunction (/home/thdxr/dev/projects/blog/node_modules/@aws-cdk/aws-cloudfront/lib/experimental/edge-function.ts:43:14)

thdxr

10/04/2021, 11:23 PM

I need to try it again using us-east-1

Frank

10/04/2021, 11:24 PM

yeah the error seems to come from here https://github.com/aws/aws-cdk/blob/283ed02c64f827161edba3e11c3cead3b54b7ee9/packa[…]k/core/lib/custom-resource-provider/custom-resource-provider.ts

thdxr

10/04/2021, 11:24 PM

yeah it works from us-east-1

thdxr

10/04/2021, 11:24 PM

since they can skip that

Frank

10/04/2021, 11:26 PM

so if u look at this line https://github.com/aws/aws-cdk/blob/283ed02c64f827161edba3e11c3cead3b54b7ee9/packa[…]k/core/lib/custom-resource-provider/custom-resource-provider.ts

Frank

10/04/2021, 11:26 PM

Copy code

fs.copyFileSync(ENTRYPOINT_NODEJS_SOURCE, path.join(props.codeDirectory, `${ENTRYPOINT_FILENAME}.js`));

Frank

10/04/2021, 11:27 PM

this is giving the error

Frank

10/04/2021, 11:27 PM

props.codeDirectory

comes from experimental function code

Frank

10/04/2021, 11:27 PM

Copy code

const serviceToken = CustomResourceProvider.getOrCreate(this, resourceType, {
      codeDirectory: path.join(__dirname, 'edge-function'),
      runtime: CustomResourceProviderRuntime.NODEJS_12_X,
      policyStatements: [{
        Effect: 'Allow',
        Resource: parameterArnPrefix,
        Action: ['ssm:GetParameter'],
      }],
    });

Frank

10/04/2021, 11:27 PM

__dirname

is resolved to the

.build