lambda-template

Modern AWS Lambda project configuration.

Get started

You will get the file from GitHub.

svn export https://github.com/k-kinzal/lambda-template/trunk lambda-template
cd lambda-template
npm install -g grunt-cli
npm install
npm run create-stack
npm run local

Project structure

.
├── Gruntfile.js
├── README.md
├── config                  // configuration dirrectory
│   ├── default.json
│   └── local.json.template // template of configuration
├── dist                    // distribute directory
├── node_modules
├── package.json
├── src
│   └── index.js            // entry point for Lambda function
├── tasks                   // task setting directory
├── templates               // cloudformation templates directory
└── test
    ├── e2e                 // e2e test directory
    ├── fixtures            // debug and test fixtures directory
    └── unit                // unit test directory

Configuration

You will generate config/local.json.template. will read as configuration the value of the key of the specified Outputs in Cloudformation.

{
  "key": "<%- cloudformationOutputKey %>"
}

var config = require('config');

console.log(config.get('key')); //-> show clouformation output value

Task

Run Lambda functioon on AWS

npm run remote

Upload and run the lambda functioon on AWS. The value of the test/fixtures/debug.json is passed as an argument to the event at the time of execution.

Please run this task after npm run create-task of execution.

Rum Lambda function on local

npm run local

Upload and run the lambda functioon on local. The value of the test/fixtures/debug.json is passed as an argument to the event at the time of execution.

Unit test

npm test

Run the unit test.

Integration test

npm run e2e

Run the e2e test. Please run this task after npm run create-task of execution.

Watch

npm run debug

By watching the file and run the jshint and test.

Create stack

npm run create-stack

Run the Cloudformation to create a stack.

{
  "AWSTemplateFormatVersion" : "2010-09-09",
  "Description": "Execution role for AWS Lambda",
  "Resources": {
    "LambdaSqsConsumerExecuteRole": {
      "Type": "AWS::IAM::Role",
      "Properties": {
        "AssumeRolePolicyDocument": {
          "Version": "2012-10-17",
          "Statement": [{
            "Sid": "",
            "Effect": "Allow",
            "Principal": {
              "Service": "lambda.amazonaws.com"
            },
            "Action": "sts:AssumeRole"
          }]
        },
        "Path": "/",
        "Policies": [{
          "PolicyName": "lambda_exec_role",
          "PolicyDocument": {
            "Version":"2012-10-17",
            "Statement":[
              {
                "Effect": "Allow",
                "Action": [
                  "logs:CreateLogGroup",
                  "logs:CreateLogStream",
                  "logs:PutLogEvents"
                ],
                "Resource": [
                  "arn:aws:logs:*:*:*"
                ]
              }
            ]
          }
        }]
      }
    }
  },
  "Outputs": {
    "ExecuteRoleArn": { "Value": { "Fn::GetAtt": ["LambdaSqsConsumerExecuteRole", "Arn"] } }
  }
}

The value specified for Outputs can be used in Lambda function by specifying the config/local.json.template.

Delete stack

npm run delete-stack

You delete the created stack.

Package

npm run package

Archive to be able to upload the Lambda function.

CI

Please change the setting of the access key that allows you to run the CloudFormation and AWS Lambda and Other resources.

travis encrypt -r [your repository] AWS_ACCESS_KEY_ID=[access key] --add
travis encrypt -r [your repository] AWS_SECRET_ACCESS_KEY=[secret access key] --add

IAM

To run the CI will need to set policy.

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "cloudformation:DescribeStacks",
                "cloudformation:CreateStack",
                "cloudformation:DeleteStack"
            ],
            "Resource": "*"
        },
        {
            "Effect": "Allow",
            "Action": [
                "iam:CreateRole",
                "iam:GetRole",
                "iam:DeleteRole",
                "iam:PutRolePolicy",
                "iam:DeleteRolePolicy"
            ],
            "Resource": "*"
        },
        {
            "Effect": "Allow",
            "Action": [
                "logs:Describe*",
                "logs:Get*"
            ],
            "Resource": "arn:aws:logs:*:*:*"
        },
        {
            "Effect": "Allow",
            "Action": [
                "lambda:CreateFunction",
                "lambda:InvokeFunction",
                "lambda:DeleteFunction"
            ],
            "Resource": "*"
        }
    ]
}

emosei/lambda-template