Scheduled Start/Stop of EC2 Instances using Lambda and CloudWatch Events

start-stop-ec2-instances.js

// Demonstration video can be found at: https://youtu.be/roAerKVfq-Y

// StopEC2Instance

const AWS = require('aws-sdk');

exports.handler = (event, context, callback) => {
    const ec2 = new AWS.EC2({ region: event.instanceRegion });
    
    ec2.stopInstances({ InstanceIds: [event.instanceId] }).promise()
        .then(() => callback(null, `Successfully stopped ${event.instanceId}`))
        .catch(err => callback(err));
};

// StartEC2Instance

const AWS = require('aws-sdk');

exports.handler = (event, context, callback) => {
    const ec2 = new AWS.EC2({ region: event.instanceRegion });
    
    ec2.startInstances({ InstanceIds: [event.instanceId] }).promise()
        .then(() => callback(null, `Successfully started ${event.instanceId}`))
        .catch(err => callback(err));
};

help:

1)EC2 instances - i have mutiple servers and i would like to start/stop using above code...Can anyone help me how to use the code
2) can i merge rds & ec2 stop/start code in one funtion ?

yes, with lambda you have the power of code in your hands, so you can do all things that you want. You could add commands to start another EC2 instances for example. Just you need is aws sdk to execute like as CLI commands.