How to load npm modules in AWS Lambda

Question

I ve created several Lambda functions using the web based editor  So far so good  I d now like to start extending those with modules  such as Q for promises   I can t figure out how to get the modules out to Lambda so they can be consumed by my functions   I ve read through this but it seems to involve setting up an EC2 and running Lambda functions from there  There is a mechanism to upload a zip when creating a function but that seems to involve sending up functions developed locally  Since I m working in the web based editor that seems like a strange workflow    How can I simply deploy some modules for use in my Lambda functions

User · Answer

You can now use Lambda Layers for this matters. Simply add a layer containing the package you need and it will run perfectly.

Follow this post: https://medium.com/@anjanava.biswas/nodejs-runtime-environment-with-aws-lambda-layers-f3914613e20e

User · Answer

npm module has to be bundeled inside your nodejs package and upload to AWS Lambda Layers as zip  then you would need to refer to your module js as below and use available methods from it  const mymodule   require   opt nodejs MyLogger

User · Answer

A  zip file is required in order to include npm modules in Lambda  And you really shouldn t be using the Lambda web editor for much of anything- as with any production code  you should be developing locally  committing to git  etc   MY FLOW   1  My Lambda functions are usually helper utilities for a larger project  so I create a  aws lambdas directory within that to house them   2  Each individual lambda directory contains an index js file containing the function code  a package json file defining dependencies  and a  node modules subdirectory   The package json file is not used by Lambda  it s just so we can locally run the npm install command    package json        name    my lambda      dependencies          svg2png     4 1 1          3  I  gitignore all node modules directories and  zip files so that the files generated from npm installs and zipping won t clutter our repo    gitignore     Ignore node modules    node modules    Ignore any zip files   zip   4  I run npm install from within the directory to install modules  and develop test the function locally   5  I  zip the lambda directory and upload it via the console    IMPORTANT  Do not use Mac s  compress  utility from Finder to zip the file  You must run zip from the CLI from within the root of the directory- see here   zip -r    yourfilename zip        NOTE   You might run into problems if you install the node modules locally on your Mac  as some platform-specific modules may fail when deployed to Lambda s Linux-based environment   See https   stackoverflow com a 29994851 165673   The solution is to compile the modules on an EC2 instance launched from the AMI that corresponds with the Lambda Node js runtime you re using  See this list of Lambda runtimes and their respective AMIs      See also AWS Lambda Deployment Package in Node js - AWS Lambda

User · Answer

You cannot load NPM modules without uploading a  zip file  but you can actually get this process down to two quick command lines   Here s how    Put your Lambda function file s  in a separate directory   This is because you install npm packages locally for Lambda and you want to be able to isolate and test what you will upload to Lambda  Install your NPM packages locally with npm install packageName while you re in your separate Lambda directory you created in step  1  Make sure your function works when running locally  node lambdaFunc js  you can simply comment out the two export handler lines in your code to adapt your code to run with Node locally   Go to the Lambda s directory and compress the contents  make sure not to include the directory itself    zip -r lambdaFunc zip    If you have the aws-cli installed  which I suggest having if you want to make your life easier  you can now enter this command    aws lambda update-function-code --function-name lambdaFunc   --zip-file fileb     path to your lambdaFunc zip    no quotes around the lambdaFunc part above in case you wonder as I did  Now you can click test in the Lambda console  I suggest adding a short alias for both of the above commands   Here s what I have in mine for the much longer Lambda update command   alias up  aws lambda update-function-code --function-name lambdaFunc   --zip-file fileb     path to your lambdaFunc zip

User · Answer

Hope this helps  with Serverless framework you can do something like this    Add these things in your serverless yml file     plugins    - serverless-webpack custom    webpackIncludeModules      forceInclude        -  lt your package name gt   for example  node-fetch    2  Then create your Lambda function  deploy it by serverless deploy  the package that included in serverless yml will be there for you   For more information about serverless  https   serverless com framework docs providers aws guide quick-start

User · Answer

Also in the many IDEs now  ex  VSC  you can install an extension for AWS and simply click upload from there  no effort of typing all those commands   region  Here s an example

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