Serverless SAM 

Serverless-sam is a plugin for the Serverless framework that makes it easy to create Serverless Application Model (SAM) templates from an application. The plugin adds the sam command to the serverless cli.

Installation

From your Serverless application directory, use npm to install the plugin:

``
$ npm install --save-dev serverless-sam
`

Once you have installed the plugin, add it to your serverless.yml file in the plugins sections.

`yaml
service: my-serverless-service

plugins:
- serverless-sam

frameworkVersion: ">=1.1.0 <2.0.0"
...
`

Usage


Use the sam export command to generate a SAM definition from your service. Use the --output or -o option to set the name for the SAM template file.

`
$ serverless sam export --output ./sam-template.yml
`

Once you have exported the template, you can follow the standard procedure with the AWS CLI to deploy the service. First, the package command reads the generated templates, uploads the packaged functions to an S3 bucket for deployment, and generates an output template with the S3 links to the function packages.

`
$ aws cloudformation package \
--template-file /path_to_template/template.yaml \
--s3-bucket bucket-name \
--output-template-file packaged-template.yaml
`

The next step is to deploy the output template from the package command:

`
$ aws cloudformation deploy \
--template-file /path_to_template/packaged-template.yaml \
--stack-name my-new-stack \
--capabilities CAPABILITY_IAM
``