# Inter-Region Cloud Instance Migration **1. Objective** The objective of this setup is to implement **cross-region data replication** between two cloud instances using Rsync. This includes: * Deploying an Ubuntu Cloud Instance in the Indore region (Primary Site) * Deploying an Ubuntu Cloud Instance in the Mumbai region (Target Site) * Installing and configuring Rsync on both instances * Transferring application data from Indore to Mumbai * Verifying successful data synchronization * Ensuring reliable and consistent data availability across regions *** **2. Architecture Overview** This architecture consists of two cloud instances located in different regions: * **Primary Instance (Indore):**\ Source of data where application data is generated * **Target Instance (Mumbai):**\ Destination where data is replicated Data transfer is performed using **Rsync over SSH**, ensuring secure and efficient synchronization. Automation can be implemented using cron jobs for periodic updates. *** **3. Prerequisites** Before starting the data replication setup, ensure the following requirements are met: *** **3.1 Infrastructure Requirements** * One Ubuntu Cloud Instance in the Indore region (Primary) * One Ubuntu Cloud Instance in the Mumbai region (Target) * Public IP assigned to both instances * Network connectivity between both instances *** **3.2 Security Configuration** * Secure communication is established using SSH * SSH access is enabled on both instances * Authentication is configured using SSH key-based authentication **Security Note:** > Data transfer between the two instances is secured using **end-to-end encryption via SSH**, ensuring confidentiality and integrity of data. \ **4. Phase 1** : **Connect to Primary VM & Install rsync** *** Step 1 : Connect to Primary VM(ssh) Run from Local Laptop / PowerShell / Terminal(cmd) ``` ssh -i .pem ubuntu@ ``` *** Step 2 : Update System Run inside Primary VM(indore region) ``` sudo apt update && sudo apt upgrade -y ``` *** Step 3 : Install rsync Run inside **Primary VM** ``` sudo apt install rsync -y rsync --version ``` Expected output: ``` rsync version 3.x.x ```

*** **5. Phase 2** : **Create Test Data on Primary VM** *** 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 ```

*** 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 Destination Instance (Mumbai region)** *** Step 6 : Exit Primary VM Run inside Primary VM ``` exit ``` *** Step 7: Copy DR SSH Key to Primary VM Run from **Local Laptop** ``` scp -i .pem .pem ubuntu@:/home/ubuntu/.ssh/dr-key.pem ```

*** Step 8: Login Back to Primary VM ``` ssh -i .pem ubuntu@ ``` *** Step 9: Set Proper Permission ``` chmod 400 /home/ubuntu/.ssh/dr-key.pem ``` *** **8. Phase 4** : **Transfer Data from Primary to Destination Instance** *** 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@:/home/ubuntu/dr-data/ ``` Expected Output: ``` sending incremental file list created directory /home/ubuntu/dr-data sample.bin test.txt ```

*** **9. Phase 5** : **Verify Data on DR VM** *** Step 11: Login to Destination Instance( Mumbai region) Run from **Local Laptop** ``` ssh -i .pem ubuntu@ ``` *** Step 12: Verify Transferred Data Run on Destination Instance ``` ls -lh /home/ubuntu/dr-data/ cat /home/ubuntu/dr-data/test.txt ``` Expected Output: ``` sample.bin test.txt DR Drill Test - Region A ```