aws-serverless-node-lambda-layer-template

Template Project to help you creating your node lambda Layer using serverless framework

Create your repo

1. Create your own repo by clicking on the [use this template] button on the home of this repo
2. Name your repo as node-NAME-layer
3. clone your repo to your local environment

Initialize the project

./initialize-layer.sh node-NAME-layer [npm-module1 npm-module2 ... npm-moduleN]

or if your repo has the name of the layer

./initialize-layer.sh $(basename $PWD) [npm-module1 npm-module2 ... npm-moduleN]

example:

./initialize-layer.sh node-testing-layer mocha chai sinon nyc

Once initialized, because the serverless.yml file comes with no account information, you can deploy it right away by passing the account as an environment variable

AWS_ACCOUNT=012345678900 sls deploy

But you can also edit the file and set your account number to it

The default region in the file is us-west-2 but if you want to deploy it to another region you can pass it as a parameter as well

AWS_ACCOUNT=012345678900 sls deploy --region us-east-1

That means you can deploy to multiple regions very easily with a simple shell for loop as you can see below:

for REGION in us-east-1 us-east-2 us-west-2; do AWS_ACCOUNT=012345678900 sls deploy --region "$REGION"; done

How to use the published layers within your serverless project

On your serverless.yml file you just add the layers to the /functions?/ using the cloud formation reference like this:

functions:
  yourFunc:
    layers:
      - ${cf:node-YOUR-LAYER-NAME-layer.LibLambdaLayerQualifiedArn}