DevOps Learning Journey 🚀

Welcome to my DevOps learning repository! This repo documents my journey through various DevOps tools, practices, and technologies.

📁 Repository Structure

This repository is organized into different folders, each focusing on a specific DevOps tool or practice:

Core DevOps Tools

• jenkins/ - Jenkins CI/CD automation server
• docker/ - Containerization with Docker
• ansible/ - Configuration management and automation
• kubernetes/ - Container orchestration platform
• terraform/ - Infrastructure as Code (IaC)

Additional DevOps Areas

• git-github/ - Version control and collaboration
• monitoring/ - Monitoring and observability tools
• cicd-pipelines/ - Continuous Integration and Deployment
• scripts/ - Automation scripts and utilities
• aws-cloud/ - Amazon Web Services cloud platform

🎯 Learning Approach

Each folder contains:

• README.md - Overview, learning topics, and resources
• Examples - Practical examples and hands-on projects
• Notes - Personal learning notes and insights
• Configuration files - Sample configurations and templates

📚 Learning Progress & Timeline

🎓 Completed Courses & Certifications

October 2025

• DevOps Hands-on Training (Oct 27 - Oct 31, 2025)

  • Provider: NTUC Learning Hub

  • Duration: 5 days intensive training

  • Status: ✅ Completed with Certificate

  • Certificate:

    

  • Topics Covered:

    • DevOps fundamentals and culture
    • CI/CD pipeline implementation
    • Container technologies (Docker)
    • Hands-on labs and real-world scenarios

  • Day 1: Jenkins pipeline for java, dotnet, python projects

  • Day 2: Jenkins slave node, nexus integration, sonarQube integration

  • Day 3: Docker containerization, docker hub, docker registry

  • Day 4: Ansible basics.

  • Day 5: Quiz (theory and hands-on assessment)

November 2025

Kubernetes Container Orchestration - ✅ COMPLETED

• YouTube Free Courses 🎥

  • Kubernetes Zero to Hero: The Complete Beginner's Guide (2025 Edition) - Alta3 Research ✅
  • Kubernetes Crash Course for Absolute Beginners [NEW] - TechWorld with Nana ✅

• Udemy Course 💰

  • Kubernetes Hands-On - Deploy Microservices to the AWS Cloud ✅

  • Status: ✅ Completed on 14-Nov-2025

  • Duration: 8 days (6-Nov to 14-Nov-2025)

  • Certificate:

    

  • Key Achievements:

    • Deployed microservices to AWS EKS
    • Implemented monitoring with Prometheus and Grafana
    • Set up logging with EFK stack
    • Created CI/CD pipelines with Jenkins
    • Built Helm charts for application deployment
    • Hands-on experience with autoscaling, ConfigMaps, Secrets, and Ingress controllers

AWS CloudFormation Infrastructure as Code - ✅ COMPLETED

• Udemy Course 💰
  • AWS CloudFormation Master Class v2 [2024]
  • Status: ✅ Completed
  • Certificate: UC-634009ff-d479-4dcc-b214-42b09eb0f237
  • Key Topics Covered:
    • YAML syntax and CloudFormation templates
    • Parameters, SSM Parameter Types, and Pseudo Parameters
    • Resources and Advanced Resources (DependsOn, DeletionPolicy, UpdateReplacePolicy, CreationPolicy, UpdatePolicy)
    • Mappings, Outputs & Cross Stack References, Conditions, Rules, Metadata
    • CFN Init, Drift Detection, Nested Stacks, StackSets
    • Deployment Options (ChangeSets, StackPolicy, Rollback, Termination, Service Roles)
    • Continuous Delivery with CodePipeline
    • Custom Resources (Lambda & SNS), WaitCondition, Dynamic References
    • Registry, 3rd-party Resource Types & Modules, Resource Imports
    • SAM (Serverless Application Model) and CDK (Cloud Development Kit) Intro
    • Macros, Template Validation, and Best Practices

GitHub Actions CI/CD Automation - ✅ COMPLETED

• Udemy Course 💰
  • GitHub Actions - The Complete Guide
  • Status: ✅ Completed
  • Certificate: UC-67a15a47-8267-43b4-a622-2a1f242d6583
  • Key Learning Outcomes:
    • Build automated workflows & processes with GitHub Actions
    • Automate code-based and project-based tasks
    • Run simple and complex workflows on various triggers
    • Build powerful CI/CD workflows with runtime configuration, security and conditional execution
    • Create custom actions and leverage public community solutions
    • Implement security best practices for GitHub Action workflows

December 2025

Terraform on AWS with SRE & IaC DevOps - ✅ COMPLETED

• Udemy Course 💰
  • Terraform on AWS with SRE & IaC DevOps | Real-World 20 Demos
  • Status: ✅ Completed
  • Start Date: 15-Nov-2025
  • Completion Date: 3-Dec-2025
  • Certificate: UC-6088cdd3-4703-4536-ab8b-5bb452f4652c
  • Focus: Real-world Terraform implementation with AWS
  • Key Learning Outcomes:
    • Mastered Terraform with 22 real-world demos
    • Built AWS VPC 3-Tier Architecture using Terraform
    • Created various Load Balancers (CLB, ALB, NLB) with Terraform
    • Implemented DNS to DB Architecture on AWS
    • Built Autoscaling with Launch Configuration and Launch Templates
    • Set up AWS CloudWatch Alarms using Terraform
    • Implemented IaC DevOps with AWS CodePipeline
    • Mastered Terraform State management (Local and Remote Backends)
    • Learned and implemented all Terraform Provisioners
    • Worked with Terraform Modules (Public and Local Modules)

Linux Basics - ✅ COURSE COMPLETED

• KodeKloud Course 🎓
  • Learning Linux Basics Course Labs
  • Status: ✅ Completed
  • Certificate: KodeKloud Certificate of Completion

KodeKloud Engineer Challenges - ✅ IN PROGRESS

• Hands-on Practice 🧩
  • Platform: engineer.kodekloud.com
  • Status: Ongoing
  • Focus: Daily/short challenges to reinforce real-world DevOps skills
  • Challenges Covered:
    • 100 Days of DevOps
    • 100 Days of AWS
    • Terraform challenges (and other KodeKloud challenge tracks)
  • Notes/Work: See kodekloud/ for my challenge notes and artifacts

Terraform Associate (004) Certification Preparation - ✅ COURSE COMPLETED

• KodeKloud Course 🎓
  • Terraform Associate Certification (HashiCorp Certified)
  • Status: ✅ Completed
  • Certificate: KodeKloud Certificate of Completion
  • Goal: Prepare for HashiCorp Certified: Terraform Associate (004)
  • Target Exam Date: Jan 2026

Learn By Doing: AWS Workshop with Terraform - ✅ COMPLETED

• KodeKloud Course 🎓
  • Learn By Doing: AWS Workshop with Terraform
  • Status: ✅ Completed
  • Certificate: KodeKloud Certificate of Completion
  • Focus: Hands-on AWS infrastructure deployment with Terraform
  • Key Learning Outcomes:
    • Practical AWS resource provisioning with Terraform
    • Real-world infrastructure scenarios and best practices
    • Applied Terraform skills in AWS environment

January 2026

HashiCorp Certified: Terraform Associate (004) - ✅ PASSED

• Certification 🎖️
  • HashiCorp Certified: Terraform Associate (004)
  • Status: ✅ PASSED
  • Exam Date: 9-Jan-2026
  • Badge: Credly Badge
  • Key Achievement:
    • Successfully passed HashiCorp Certified: Terraform Associate (004) certification
    • Demonstrated proficiency in Infrastructure as Code (IaC) with Terraform
    • Validated skills in Terraform workflow, configuration, state management, and modules

Docker Training Course for the Absolute Beginner - ✅ COMPLETED

• KodeKloud Course 🎓
  • Docker Training Course for the Absolute Beginner
  • Status: ✅ Completed
  • Completion Date: 12-Jan-2026
  • Certificate: KodeKloud Certificate of Completion
  • Part of: CKA Learning Path Preparation
  • Key Learning Outcomes:
    • Docker fundamentals and container concepts
    • Docker images, containers, and volumes
    • Docker networking and container orchestration basics
    • Hands-on practice with Docker commands and workflows

Kubernetes for the Absolute Beginners - Hands-on Tutorial - ✅ COMPLETED

• KodeKloud Course 🎓
  • Kubernetes for the Absolute Beginners - Hands-on Tutorial
  • Status: ✅ Completed
  • Completion Date: 15-Jan-2026
  • Certificate: KodeKloud Certificate of Completion
  • Part of: CKA Learning Path Preparation
  • Key Learning Outcomes:
    • Kubernetes fundamentals and core concepts
    • Pods, ReplicaSets, and Deployments
    • Services and networking basics
    • YAML configuration files
    • kubectl commands and basic troubleshooting

February 2026

Certified Kubernetes Administrator (CKA) Course - ✅ COMPLETED

• KodeKloud Course 🎓
  • CKA Certification Course - Certified Kubernetes Administrator
  • Status: ✅ COMPLETED
  • Completion Date: 5-Feb-2026
  • Certificate: KodeKloud Certificate of Completion
  • Duration: 25.52 Hours
  • Key Learning Outcomes:
    • Core concepts: Cluster architecture, API primitives, services & networking
    • Scheduling: Labels, selectors, resource limits, manual scheduling, DaemonSets
    • Logging & Monitoring: Application logs, monitor cluster components
    • Application Lifecycle Management: Rolling updates, rollbacks, ConfigMaps, Secrets, multi-container pods
    • Cluster Maintenance: OS upgrades, cluster upgrades, backup and restore with ETCD
    • Security: Authentication, authorization, RBAC, security contexts, network policies, TLS certificates
    • Storage: Persistent volumes, persistent volume claims, storage classes
    • Networking: CNI, DNS, CoreDNS, Ingress controllers, network policies
    • Troubleshooting: Application, control plane, worker nodes, networking issues
    • Advanced topics: JSON PATH, custom resource definitions, operator framework

Ultimate Certified Kubernetes Administrator (CKA) Mock Exam Series - ✅ COMPLETED

• KodeKloud Course 🎓
  • Ultimate Certified Kubernetes Administrator (CKA) Mock Exam Series
  • Status: ✅ Completed
  • Completion Date: 23-Feb-2026
  • Certificate: KodeKloud Certificate of Completion
  • Part of: CKA Learning Path
  • Key Learning Outcomes:
    • Practice exam simulations and hands-on scenarios
    • Mastered exam format and time management
    • Reinforced Kubernetes administration skills under exam conditions

March 2026

Certified Kubernetes Administrator (CKA) - ✅ PASSED

• Certification 🎖️
  • Certified Kubernetes Administrator (CKA)
  • Status: ✅ PASSED
  • Exam Date: 17-Mar-2026
  • Badge: Credly Badge
  • Key Achievement:
    • Successfully passed Certified Kubernetes Administrator (CKA) certification
    • Demonstrated proficiency in Kubernetes cluster administration
    • Validated skills in cluster architecture, networking, storage, security, and troubleshooting

Future Learning Goals

• Continuous Learning 🚀
  • AWS EKS Kubernetes Karpenter DevOps Production
  • DevOps Projects | Real Time DevOps & GitOps Projects
  • AWS Certified CloudOps Engineer Associate SOA-C03 2025

🎯 What's Next?

• Real-world DevOps Projects: Apply learned skills in practical scenarios
• AWS Certification: Pursue AWS Certified CloudOps Engineer Associate
• GitOps Practices: Implement modern deployment methodologies
• Career Advancement: Build portfolio with real-world project implementations

📖 Resources

General DevOps Resources

• The Phoenix Project
• The DevOps Handbook
• AWS DevOps Blog
• DevOps Roadmap

Online Learning Platforms

• Udemy
• Linux Academy
• KodeKloud

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