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🚀 Introduction to DevOps
DevOps is a set of practices that combines software development (Dev) and IT operations (Ops). It aims to shorten the system development life cycle and provide continuous delivery with high software quality.
🔧 Installing Jenkins on Ubuntu
To get started with DevOps automation, Jenkins is one of the most popular tools. You can install Jenkins on Ubuntu by running the following commands:
sudo wget -O /etc/apt/keyrings/jenkins-keyring.asc \
https://pkg.jenkins.io/debian/jenkins.io-2023.key
echo "deb [signed-by=/etc/apt/keyrings/jenkins-keyring.asc]" \
https://pkg.jenkins.io/debian binary/ | sudo tee \
/etc/apt/sources.list.d/jenkins.list > /dev/null
sudo apt-get update
sudo apt-get install jenkins
⚙️ Setting Up a CI/CD Pipeline
Continuous Integration and Continuous Deployment (CI/CD) are key DevOps practices. With Jenkins installed, you can now set up a pipeline:
pipeline {
agent any
stages {
stage('Build') {
steps {
echo 'Building...'
}
}
stage('Test') {
steps {
echo 'Running tests...'
}
}
stage('Deploy') {
steps {
echo 'Deploying application...'
}
}
}
}
🐳 Docker in DevOps
Docker is used to containerize applications. Here’s a sample Dockerfile to run a Node.js app:
FROM node:18
WORKDIR /app
COPY . .
RUN npm install
EXPOSE 3000
CMD ["npm", "start"]
📦 Conclusion
DevOps streamlines the development and deployment process, leading to faster delivery and better quality software. Mastering tools like Jenkins, Docker, and CI/CD pipelines is essential for any modern DevOps engineer.
