📌 Cloud Basics Demo Project"

Create server and deploy application on DigitalOcean Droplet

🛠 Tech Stack:

DigitalOcean Droplet, Linux, Java, Gradle, ChatGPT

Project Description:

• Setup and configure a server on DigitalOcean
• Create and configure a new Linux user on the Droplet
• Firewall Configuration Security Best Practice
• Deploy and run a Java Gradle application on Droplet

🚀 Downloads

1. Clone this repository:

   git clone [email protected]:CharismaIsland/Basic-Cloud-Server-Deploy-Java-React-Maven-App.git
   cd cloud-basics-create-server

2. Install Requirements:
   • Java JRE SDK ver. 17 only
   • Gradle ver. 8.14.3
   • IntelliJ IDE (will be used to build gradle project)

🚀 How to Recreate This DevOps Project

For Windows

1. Find the Java installation path:

   • Default: C:\Program Files\Java\jdk-
   • Copy this path.

2. Set Java_Path:

   • Go to Advanced System Settings:
   • Click Environment Variables
   • Click New:
   • Set New Variable name: JAVA_HOME
   • Variable value: path to JDK folder (e.g., C:\Program Files\Java\jdk-)

3. Verify

   • Open Commmand Prompt and run:

   java -version
   javac -version
   echo %JAVA_HOME%

---

For Linux/MacOS

1. Find Java Installation Path

   which java
   readlink -f $(which java)

2. Set JAVA_HOME
   • Open profile file:
     • ~/.bashrc or ~/.zshrc
   • Add:

export JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64
export PATH=$JAVA_HOME/bin:$PATH

🔧 Troubleshooting

If you encounter compatibility issues, copy error message into ChatGPT for step-by-step assisstance. Context Prompt:

I am trying to set the Java JAVA_HOME environment variable, but I’m running into an error.
Here is the exact message I see from my console/terminal:

"Copy and paste the exact message here"

help me figure out what’s causing this and how to fix it?

---

🧑‍💻 Manual Setup

Setup Digital Ocean Server or Cloud Provider of Choice

1. Free Tier - Select Basic CPU - at least 1GB in region nearest to you
2. Allow TCP Port 22 to Your IP only
3. Create SSHKey to connect to server from your local PC
   • Follow Instructions with Cloud Provider if you need to create your first SSHKey
4. Open TCP Port 7071 (will be used to connect to App later http://localhost:7071)

Configure and Build Gradle

1. Create a Gradle folder under C:\drive
2. Copy download to new Gradle folder and unzip
3. Use IntelliJ IDE - Open Folder where repo downloaded 'java-react-example'
4. In IDE Terminal - Build Gradle Project - Run Command:

gradle build

5. Test App

java -jar ./build/libs/java-react-example.jar 

6. Secure Copy .jar file from your local host to server public IP

scp build/libs/java-react-example.jar root@<replace_with_server_ip>:/root

7. Connect to Cloud server via SSH via Terminal or Putty (for Windows)

ssh root@<server-public-ip>

8. Run Java App On Server with Command:

java -jar java-react-example.jar 

9. Connect App from Browser on http://localhost:7071

10. Remember to terminate cloud server to avoid unnecesary costs

🔑 Notes

• All data is mock/simulated for educational purposes.
• Remember to Terminate Hosts
• Optimize and Add as you see fit
• Consider creating Terraform template for Infrastructure as Code

🎯 Enjoy Building 🚀