AWS Serverless Cheat Sheet

exports.handler = async (event) => {
  return {
    statusCode: 200,
    body: JSON.stringify('Hello from Lambda!')
  };
};

1. Create Lambda function
2. Create REST API using API Gateway
3. Add method to trigger Lambda

const AWS = require('aws-sdk');
const dynamo = new AWS.DynamoDB.DocumentClient();

const params = {
  TableName: 'Users',
  Key: { id: '123' }
};

dynamo.get(params).promise().then(data => console.log(data));

sls create --template aws-nodejs
sls deploy
sls invoke -f hello

# Lambda handler in Python
def lambda_handler(event, context):
    return {
        "statusCode": 200,
        "body": "Hello from Lambda"
    }

aws events put-rule --schedule-expression "rate(5 minutes)" --name MyRule

{
  "Comment": "Simple Step Function",
  "StartAt": "FirstState",
  "States": {
    "FirstState": {
      "Type": "Pass",
      "Result": "Hello",
      "End": true
    }
  }
}