AWS DRS Automation Using AWS Lambda

Restore EC2 instances via AWS DRS automatically using AWS Lambda

This utility is to automatize recovery of EC2's or On-Prem VM's(which are registered in AWS DRS) to AWS . We have adhered to best practices of AWS Lambda + AWS DRS services.

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Use Cases:

1. Automate recovery of applications hosted in Ec2 during an event of disaster. (Recovery can be Point-In-time or Latest)
2. Perform DR drills of applications

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Prerequisites

1. AWS DRS agent installed and configured in your EC2 or VM,visit Source server registrtion
2. AWS DRS EC2 launch template configured,visit DRS Launch Template
3. Recovery instance launch settings,visit Ec2 Launch Settings
4. S3 bucket

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Overview

1. This repository uses CloudFormation template to launch the resources in AWS.Below are the services launched by CFT
   • AWS Lambda with Python 3.9 Runtime.
   • IAM Role with IAM policy required to restore servers using AWS DRS
2. Lambda function uses Boto3 to make AWS DRS API calls to perform recovery opertaions.

How To Guide:

1. Upload drs-repl.zip to an S3 bucket and note the path
2. Create a CloudFormation Stack using the lambda.yaml template
3. Event to be passed to AWS Lambda:
   • For Point In Time Recovery (use Snapshot ID):

      {
          "IsDrill": "False",
          "SourceId": "s-xyzx1231sadasd231",
          "Snapshot_Id": "snap-0ewasd12342121o"
       }
     

   • Recover application servers from LATEST data (Don't pass any snapshot ID):

     {
        "IsDrill": "False",
        "SourceId": "s-xyzx1231sadasd231",
        "Snapshot_Id": ""
     }
     

4. You can invocate your lambda in multiple ways, visit Invoking Lambda functions

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Parmeters used in CFT

1. pLambdaFnName - Valid name of the Lambda function
2. pBucketName - S3 bucket name where lambda deployment (.zip) file is uploaded
3. pZipFilepath - Exact path of lambda deployment (.zip) file is uploaded (ex:lambda/backend.zip )