🛠️ DevOps Automation Toolkit

From Scripting Fundamentals to Microservices Orchestration

This repository serves as a comprehensive professional portfolio of Infrastructure as Code (IaC) and Configuration Management. It documents a structured progression from advanced Linux shell scripting to the end-to-end automated deployment of a production-grade microservices architecture (RoboShop) on AWS.

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🌟 Project Highlights

• Full-Stack Orchestration
  Automated deployment of 7+ microservices built using GoLang, Python, Java, and Node.js.

• MNC-Standard Engineering Practices
  Implemented Idempotency, Error Trapping, and Dynamic Configuration Management using SystemD and Environment Variables.

• Hybrid Database Integration
  Seamless configuration and automation of MongoDB, Redis, MySQL, and RabbitMQ within a private VPC.

• Professional Observability
  Centralized logging with SyslogIdentifier and journalctl for real-time debugging and monitoring.

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📂 Repository Structure

The repository is divided into two core learning and implementation phases:

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1. bash_scripts/ – Fundamentals & Logic

This module demonstrates mastery of Linux internals and scripting best practices required for senior DevOps roles:

• Idempotency & Logic
  Advanced if-elif-else patterns and reusable functions for package installation.

• Security
  Implementation of secure user input handling and automated password generation (user_creator.sh).

• Robustness
  Usage of set -e and trap to ensure scripts fail gracefully during execution errors.

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2. aws-automation/ – RoboShop Microservices

The capstone project: A complete automation suite for the RoboShop E-commerce platform.

• Frontend
  Nginx Reverse Proxy configuration with dynamic internal DNS resolution.

• Backend
  Build and deployment automation for:

  • GoLang (Dispatch)
  • Java (Shipping)
  • Python (Payment)
  • Node.js (Cart / User / Catalogue)

• Database Layer
  Automated schema loading and cluster initialization for both SQL and NoSQL databases.

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🚀 Engineering Standards (MNC Ready)

🔐 Zero-Secret Footprint

To adhere to professional security audits:

• No credentials or hostnames are hardcoded
• All sensitive data is injected at runtime using:

Positional Parameters

sudo sh mysql.sh <db_password>

Environment Files

/etc/roboshop/*.env

This ensures complete separation between configuration and application logic.

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🔄 Idempotency

Every script is built with the “Run-Again Philosophy”:

• Safe to execute multiple times
• Prevents duplicate users, services, and configurations
• Validates existing system states before performing any action

Example:

• Checking for existing user using id roboshop
• Conditional database initialization
• Package installation checks

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🎯 Final Objective

This repository demonstrates:

• Real-world DevOps automation standards
• Enterprise-grade deployment methodology
• Production-ready scripting and configuration management

A complete journey from Linux shell scripting fundamentals → AWS microservices automation.

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Happy Automating! 🚀