Lambda function to start and stop ec2 instance based on schedule using Scheduled Events. Event names: name-name-instanceStart / name-name-instanceStop

EC2-Instance-autostart.js

'use strict';
console.log('Loading the function...');

const AWS = require('aws-sdk');
const ec2 = new AWS.EC2({apiVersion: '2016-11-15'});
exports.handler = (event, context, callback) => {
    var eventData = event.resources[0].split('/')[1];
    console.log('Event name currently triggerd is = ',eventData);
    var unprocessedEventArray = eventData.split('-');

var params = {
  InstanceIds: [
    'Instance-ID',
  ],
  DryRun: false
};
console.log(unprocessedEventArray);
if(unprocessedEventArray[2] === 'instanceStart') {
    ec2.startInstances(params, function(err, data) {
      if (err) return callback(err, err.stack); // an error occurred
      else     return callback(null, "instance started");           // successful response
    });
}

else if(unprocessedEventArray[2] === 'instanceStop'){
    ec2.stopInstances(params, function(err, data) {
      if (err) return callback(err, err.stack); // an error occurred
      else     return callback(null, "instance stopped");           // successful response
    });
}

else{
    return callback("error in the event name passed")
}

};