Day 01

🗓️ Day 01 – Maven Basics & Setup

📘 Introduction to Maven in DevOps Context

  • Maven is a build automation and dependency management tool widely used in DevOps pipelines.
  • Helps standardize project builds, manage dependencies, and integrate with tools like Nexus, SonarQube, Jenkins/GitLab CI, and Tomcat.
  • In DevOps, Maven ensures repeatable builds and easy integration with CI/CD pipelines.

⚙️ Installing Maven

On Linux (RHEL/Ubuntu)

  1. Install Java (required by Maven):
    sudo apt install openjdk-11-jdk -y # Ubuntu/Debian
    sudo yum install java-11-openjdk -y # RHEL/CentOS

  2. Download Maven:
    wget https://downloads.apache.org/maven/maven-3/3.9.9/binaries/apache-maven-3.9.9-bin.tar.gz

  3. Extract and move:
    tar -xvzf apache-maven-3.9.9-bin.tar.gz
    sudo mv apache-maven-3.9.9 /opt/maven

On Windows

  1. Download from https://maven.apache.org/download.cgi
  2. Extract into C:\Program Files\Maven
  3. Add MAVEN_HOME and update PATH in Environment Variables

🔧 Configure Environment Variables

On Linux

Add to ~/.bashrc or ~/.zshrc:
export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64
export M2_HOME=/opt/maven
export MAVEN_HOME=/opt/maven
export PATH=$M2_HOME/bin:$PATH

Reload shell:
source ~/.bashrc

On Windows

  • JAVA_HOME = C:\Program Files\Java\jdk-11
  • MAVEN_HOME = C:\Program Files\Maven
  • Add %MAVEN_HOME%\bin to PATH

✅ Verify Installation

Run:
mvn -v

Expected output:
Apache Maven 3.9.9 (…)
Java version: 11.0.x

🛠️ Hands-On: Create First Maven Project

Generate a project:
mvn archetype:generate -DgroupId=com.demo -DartifactId=myapp -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false

Project structure:
myapp/
├── src/main/java
├── src/test/java
└── pom.xml

Build and install:
cd myapp
mvn clean install

🎯 Assignment

  • Install Maven on your system (Linux or Windows).
  • Configure JAVA_HOME and MAVEN_HOME.
  • Create your first Maven project and run mvn clean install.
  • Explore the target/ folder to see generated artifacts.