DevOps Mini Project 2: Create & Push Java Maven App to GitHub (Amazon Linux 2)

🎯 Objective:

• Set up your Amazon Linux 2 environment with Java, Maven, and Git

• Create a simple Java application using Maven

• Initialize a Git repository

• Push the code to GitHub

📦 Part 1: Install Required Tools

🔹 Step 1: Update your Amazon Linux system

sudo yum update -y

🔹 Step 2: Install Java (Amazon Corretto 11)

sudo amazon-linux-extras enable corretto11
sudo yum install java-11-amazon-corretto -y

✅ Verify Java installation

java -version

Expected output:

openjdk version "11.0.x"  Amazon Corretto

🔹 Step 3: Install Maven (Manually)

Amazon Linux doesn’t include Maven by default.

📥 Download Maven

cd /opt
sudo curl -O https://downloads.apache.org/maven/maven-3/3.8.8/binaries/apache-maven-3.8.8-bin.tar.gz

📂 Extract Maven

sudo tar -xvzf apache-maven-3.8.8-bin.tar.gz
sudo ln -s apache-maven-3.8.8 maven

⚙️ Set Maven environment variables

sudo tee /etc/profile.d/maven.sh <<EOF
export M2_HOME=/opt/maven
export PATH=\${M2_HOME}/bin:\${PATH}
EOF

source /etc/profile.d/maven.sh

✅ Verify Maven

mvn -version

Expected:

Apache Maven 3.8.8
Java version: 11.x.x

🔹 Step 4: Install Git

sudo yum install git -y

✅ Verify Git

git --version

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🧪 Part 2: Create Java Maven Project

🔹 Step 5: Create a new Maven-based Java project

mvn archetype:generate -DgroupId=com.devopsseries.app \
-DartifactId=devops-mini-app \
-DarchetypeArtifactId=maven-archetype-quickstart \
-DinteractiveMode=false

Navigate into the project:

cd devops-mini-app

🔹 Step 6: Explore Project Structure

tree . -L 3

Expected:

.
├── pom.xml
└── src
    ├── main
    │   └── java
    └── test
        └── java

🔹 Step 7: Build & Test App

Compile:

mvn compile

Run unit tests:

mvn test

Build the .jar file:

mvn package

Check output:

ls target/

Expected:

devops-mini-app-1.0-SNAPSHOT.jar

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🚀 Part 3: Push to GitHub

🔹 Step 8: Initialize Git Repo

git init
git add .
git commit -m "Initial commit - Java Maven app"

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🔹 Step 9: Create a GitHub Repository

1. Go to https://github.com

2. Click "New" → name it devops-mini-app

3. Do NOT check “Initialize with a README”

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🔹 Step 10: Push Code

git remote add origin https://github.com/YOUR_USERNAME/devops-mini-app.git
git branch -M main
git push -u origin main

✅ Check GitHub Repo — your code should now be there!

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🧹 Optional: Add .gitignore

To ignore target/ directory and keep your repo clean:

echo "target/" >> .gitignore
git add .gitignore
git commit -m "Add .gitignore"
git push

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📌 Final Summary: