🧪 Lab 2: Cloud Deployment Strategies (AWS, RHEL) (OPTIONAL LAB)

Course: CompTIA Cloud+ CV0-004
Objective: Understand deployment models and implement a simple blue/green deployment strategy using AWS and RHEL.

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🎯 Goals

• Review cloud deployment models (Public, Private, Hybrid)
• Perform a basic blue/green deployment using EC2 and Route 53
• Understand rollback strategies and cutover techniques

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📚 Part 1: Review Cloud Deployment Models

Model	Description	Example
Public	Hosted by third-party cloud provider	AWS, Azure, GCP
Private	Exclusive cloud environment for one org	On-prem OpenStack
Hybrid	Combines public and private clouds	AWS Direct Connect + VMware

✅ Checkpoint: Know when to use each model depending on compliance, control, or scale.

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🚀 Part 2: Launch Blue & Green EC2 Environments with RHEL

1. Launch Blue Instance:

• AMI: Red Hat Enterprise Linux 9 (Free Tier eligible)
• Instance Type: t2.micro
• Name Tag: blue-server
• User Data:

#!/bin/bash
sudo dnf update -y
sudo dnf install -y httpd
echo "<h1>Blue Version - RHEL</h1>" | sudo tee /var/www/html/index.html
sudo systemctl enable httpd
sudo systemctl start httpd

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🔁 Part 3: Create Green Environment and Test Cutover

1. Launch Green Instance:

• AMI: Red Hat Enterprise Linux 9
• Instance Type: t2.micro
• Name Tag: green-server
• User Data:

#!/bin/bash
sudo dnf update -y
sudo dnf install -y httpd
echo "<h1>Green Version - RHEL</h1>" | sudo tee /var/www/html/index.html
sudo systemctl enable httpd
sudo systemctl start httpd

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🌐 Part 4: Use Route 53 to Cut Over Traffic

1. Create a Hosted Zone

• Go to AWS Management Console → Route 53 → Hosted Zones
• Click Create Hosted Zone
• Click Create Hosted Zone
• Domain name: cca-yourname-cloudlab.duckdns.org (or use a registered domain) - Example: cca-yourname-cloudlab.duckdns.org
• Type: Public hosted zone

📌 Note: If you do not own a domain, you can test using public IPs or consider using a free domain provider like duckdns for lab purposes.

2. Create an A Record for the Blue Environment

• In your new hosted zone, click Create record
• Record name: cca-yourname-cloudlab.example.com
• Record type: A – IPv4 address
• Value: Public IP of the Blue EC2 instance
• TTL: 60 seconds (low TTL helps with testing cutovers)
• Click Create records

3. Test the DNS Routing

• Use dig or nslookup to verify resolution:

#!/bin/bash
dig cca-yourname-cloudlab.example.com

✅ Lab Complete