• Automatically attach layers for each lambda function
• Creates a new layer version when package.json was updated
• If package.json was not changed, it does not publish a new layer
• Reduces drastically lambda size
• It reduces deployment time.
• Share same layers (libraries) with all lambda functions

• Serverless >= 1.34.0 (layers support)
• Node >= v6.10.3
• NPM >= 3.10.10
• AWS only (sorry)
• A valid package.json file

npm install -D serverless-layers

or

serverless plugin install --name serverless-layers

Add the plugin to your serverless.yml file:

provider:
  ...
  deploymentBucket:
    name: 'your_bucket'

plugins:
  - serverless-layers

Example:

custom:
  serverless-layers:
    packageManager: npm

This plugin will setup follow options automatically if not specified at serverless.yml.

serverless-layers-policy.json

{
   "Version":"2012-10-17",
   "Statement":[
      {
         "Effect":"Allow",
         "Action":[
            "s3:PutObject",
            "s3:GetObject"
         ],
         "Resource": "arn:aws:s3:::examplebucket"
      },
      {
         "Effect":"Allow",
         "Action":[
            "cloudformation:DescribeStacks"
         ],
         "Resource": "*"
      },
      {
         "Effect":"Allow",
         "Action":[
            "lambda:PublishLayerVersion"
         ],
         "Resource": "*"
      }
   ]
}

Yes, thank you! This plugin is community-driven, most of its features are from different authors. Please update the docs and tests and add your name to the package.json file. We try to follow Airbnb's JavaScript Style Guide.

MIT