CODEWITHSUNDEEP
node.jsamazon-web-servicesaws-lambda
kallada
kallada

Reputation: 1929

AWS lambda function error - Unable to import module 'index': Error

I'm trying to create a lambda in nodejs. Following the documentation, I have created a zip file with lambda function, node_modules and package.json. The structure of my lambda zip file is as follows:

my-lambda-function/
|
|---util/
|     |
|     |--util-1.js
|     |--util-2.js
|---api/
|     |
|     |--api-call-1.js
|     |--api-call-2.js    
|
|---config
|     |
|     |--env/
|     | |--env-file-1.js
|     |
|     |--config-file-1.js
|     |--config-file-2.js
|
|---node_modules/
|     |
|     |--module-1/
|     |--module-2/
|---index.js
|---package.json

For creating the this zip file I'm using a gulp task, 

gulp.task('zip', ['test'], () => {
 const buildArtifact = ['index.js', 'package.json', 'util/**', 
 'config/**', 'api/**'];
 Object.keys(pjson.dependencies).forEach((dep) => {
  buildArtifact.push(`node_modules/${dep}/**/*`);
 });
 const zipFile = `${pjson.name}.zip`;
 return gulp.src(buildArtifact, { base: '.' })
   .pipe(zip(zipFile))
   .pipe(gulp.dest('build'));
});

This lambda is running locally with lambda-local. But while testing this lambda is throwing error 

Unable to import module 'index': Error
at Function.Module._resolveFilename (module.js:547:15)
at Function.Module._load (module.js:474:25)
at Module.require (module.js:596:17)
at require (internal/module.js:11:18)
at Object.<anonymous> (/var/task/node_modules/ioredis/built/utils/lodash.js:2:19)
at Module._compile (module.js:652:30)
at Object.Module._extensions..js (module.js:663:10)
at Module.load (module.js:565:32)

Current error is pointing to ioredis module (which is available in node_modues folder), but if I remove the usage of ioredis from the code (by removing the imports for ioredis) then the error changes to another node module.

It seems my lambda function is unable to load/find the node_modules. Is it due to lambda is failing to install npm?

Any pointers to solve this would be helpful as we are struggling with this for a few days

Thanks

More details

  1. We can reproduce the error by deleting the node_modules folder and then running the lambda locally
  2. If I remove all my dependencies, a trivial logging statement will work.
  3. The lambda is using node 8.10 in aws

Answer (@Kannaiyan)

Changing the zip task to:

gulp.task('npm-install', () => gulp.src('./package.json')
  .pipe(gulp.dest('build/'))
  .pipe(install({ production: true })));

worked for me.

Upvotes: 1

Views: 16278

Answers (2)

Soft Bullets
Soft Bullets

Reputation: 5133

Also got this error when creating an AWS::Serverless::Function using CloudFormation, and specifying the code with InlineCode, where the code referenced a dependency that was not bundled in the selected Runtime.

Note that some packages are included in the runtime (eg. nodejs8.10 seems to have at least aws-sdk and util).

Upvotes: 0

Kannaiyan
Kannaiyan

Reputation: 13055

Unable to import module 'index': Error

It looks like some of your dependencies are installed / not packaged correctly. Delete the node_modules directory and re-install the module with npm install should fix the issue.

Make sure your function get packaged as mentioned in the doc https://docs.aws.amazon.com/lambda/latest/dg/nodejs-create-deployment-pkg.html

If your bundle missed a node_module, then it will result in this error.

EDIT1:

You got an issue with gulp packaging.

The following example has the complete documentation for packaging lambda with gulp.

https://medium.com/@AdamRNeary/a-gulp-workflow-for-amazon-lambda-61c2afd723b6

Hope it helps.

Upvotes: 5

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