VM Migration: Indore Region to Mumbai Region

Disaster Recovery (DR) Drill

Cross-Region Data Replication Using rsync

Primary Region: Indore DR Region: Mumbai Operating System: Ubuntu 22.04 LTS

1. Objective

The objective of this DR Drill is to:

• Deploy Ubuntu VM in Indore (Primary)

• Deploy Ubuntu VM in Mumbai (DR Site)

• Install and configure rsync

• Transfer application data from Indore to Mumbai

• Verify successful replication

• Validate DR readiness

2. Architecture Overview

Component	Region	Purpose
Primary VM	Region A	Source Server
DR VM	Region B	Disaster Recovery Server
rsync over SSH	Secure Channel	Data Replication

3. Prerequisites

Before starting the DR drill, ensure the following:

Infrastructure Requirements

• 1 Ubuntu VM in Indore region

• 1 Ubuntu VM in Mumbai region

• Public IP assigned to both VMs

• Port 22 (SSH) open in Security Group

Access

• Primary VM SSH Key → <PRIMARY_KEY>.pem

• DR VM SSH Key → <DR_KEY>.pem

• Laptop with SSH access enabled

4. Phase 1 : Connect to Primary VM & Install rsync

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Step 1 : Connect to Primary VM(ssh)

Run from Local Laptop / PowerShell / Terminal(cmd)

ssh -i <PRIMARY_KEY>.pem ubuntu@<PRIMARY_PUBLIC_IP>

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Step 2 : Update System

Run inside Primary VM(indore region)

sudo apt update && sudo apt upgrade -y

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Step 3 : Install rsync

Run inside Primary VM

sudo apt install rsync -y
rsync --version

Expected output:

rsync version 3.x.x

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5. Phase 2 : Create Test Data on Primary VM

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Step 4 : Create Test Directory and Files

Run inside Primary VM

mkdir -p /home/ubuntu/dr-data
echo "DR Drill Test - Region A" > /home/ubuntu/dr-data/test.txt
dd if=/dev/urandom of=/home/ubuntu/dr-data/sample.bin bs=1M count=10

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Step 5 : Verify Data Creation

Run inside Primary VM

ls -lh /home/ubuntu/dr-data/

Expected Output:

sample.bin  (10MB)
test.txt

7. Phase 3 :Prepare SSH Access to DR VM (Mumbai region)

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Step 6 : Exit Primary VM

Run inside Primary VM

exit

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Step 7: Copy DR SSH Key to Primary VM

Run from Local Laptop

scp -i <PRIMARY_KEY>.pem <DR_KEY>.pem ubuntu@<PRIMARY_PUBLIC_IP>:/home/ubuntu/.ssh/dr-key.pem

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Step 8: Login Back to Primary VM

ssh -i <PRIMARY_KEY>.pem ubuntu@<PRIMARY_PUBLIC_IP>

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Step 9: Set Proper Permission

chmod 400 /home/ubuntu/.ssh/dr-key.pem

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8. Phase 4 : Transfer Data from Primary to DR

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Step 10: Execute rsync

Run inside Primary VM

rsync -avz -e "ssh -i /home/ubuntu/.ssh/dr-key.pem -o StrictHostKeyChecking=no" \
/home/ubuntu/dr-data/ ubuntu@<DR_PUBLIC_IP>:/home/ubuntu/dr-data/

Expected Output:

sending incremental file list
created directory /home/ubuntu/dr-data
sample.bin
test.txt

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9. Phase 5 : Verify Data on DR VM

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Step 11: Login to DR VM( Mumbai region)

Run from Local Laptop

ssh -i <DR_KEY>.pem ubuntu@<DR_PUBLIC_IP>

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Step 12: Verify Transferred Data

Run inside DR VM

ls -lh /home/ubuntu/dr-data/
cat /home/ubuntu/dr-data/test.txt

Expected Output:

sample.bin
test.txt
DR Drill Test - Region A

10. Disaster Simulation (Optional)

To simulate failure:

• Stop Primary VM

• Or Block SSH in Security Group

Then confirm DR VM remains accessible.