🚀 DevOps — TWN Bootcamp Notes & Projects

Learning journal + technical portfolio documenting my progression through modern DevOps practices.

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📖 About

This repository is associated to my DevOps Notion Website. It contains exercises, scripts, configurations and projects completed during the TWN DevOps Bootcamp of Nana Janashia and personal explorations through DevOps environment.

I started in December 2025, dedicating 30-40 hours/week - going well beyond the announced 15-20h - testing, experimenting, and deepening my understanding of each concept and tool.

💡 My goal is to become a real operational Cloud & DevOps Engineer

and as said Enstein : "The more I learn, the more I realize how much I don't know"

I build, I run, so if you're looking for a persevering candidate -> Please, let's connect.

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📚 Content Overview

PART 1 — Prerequisites

Topic	Key Concepts	What is in the repository
VirtualBox	Extension Pack clean install version checks
Linux Basics	OS info package managers Vim users/groups permissions SSH	script_install_java.sh — Install Java + version check ps_user.sh — List & sort user processes by CPU/mem install_server_js.sh — Full Node.js app deployment (env vars, background run, log dir, service user)
Database Types	Relational vs NoSQL organization patterns	Schema of Database's types
Bash Scripting	Variables, conditions loops, functions, I/O	scripts with conditions, loops, functions with local scope and return codes, I/O: args, user input, file/CSV parsing, process substitution, file check
Git Version Control	Commands, branches, conflicts, stash, reset/revert	10 scripted exercises: clone, .gitignore, feature/bugfix branches, merge requests, conflict resolution, revert & reset commits, branch cleanup
Build Tools & Package Managers	Artifacts, Maven/Gradle, Webpack, Docker basics	6 exercises on a Gradle Java app (fix test, build, run jar, add params) + React/Node.js full-stack example with Webpack and Dockerfile

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PART 2 — DevOps Fundamentals

Topic	Key Concepts	What's in the repo
Cloud & IaaS	Cloud service types, DigitalOcean Droplet, firewall, SSH config	6 exercises: package Node.js app (npm pack), provision DigitalOcean Droplet, install Node/npm, deploy artifact via SSH, run in background, open firewall port
Nexus Repository Manager	Installation, repo types, artifact publishing (Maven/Gradle), API, automation	9 exercises: install Nexus, create npm & Maven repos, manage roles/users, publish Node.js tar & Gradle jar, query REST API, automate artifact fetch & deploy on DigitalOcean
Docker Containers	Images, volumes, networks, Dockerfile, Docker Compose, best practices, multi-stage builds	8 exercises: MySQL + phpMyAdmin via Docker network & secrets, docker-compose with volumes & healthcheck, Dockerfile for Java app, push to Nexus Docker repo, full stack deployed on DigitalOcean
Nginx	Reverse proxy, web server, Kubernetes Ingress Controller	Submodule: Express app × 3 containers behind NGINX (reverse proxy, load balancer, TLS termination, gzip, cache)

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PART 3 — DevOps Core

Topic	Key Concepts	What's in the repo
Jenkins CI/CD	Freestyle jobs Pipelines Jenkinsfiles Multibranch Shared libraries Webhooks Auto-Versioning	java-maven-app/ — freestyle → Jenkinsfile + script.groovy java-dockerhub-pipeline/ — pipeline CI to Docker Hub java-dockerhub-shared/ — global shared library java-dockerhub-limited-shared/ — project-scoped shared library (submodule, DockerHub/ECR, EC2 SSH/SSM) auto-versioning-pipeline/ — Maven patch auto-increment + SCM skip Jenkins-exercises/ — Node.js full pipeline: Jest, Docker Hub push, Git commit-back jenkins-docker-platform*.sh — auto-install Jenkins+Docker (Ubuntu, AL2023) + scalable agents platform (docker/maven/nodejs/aws)
AWS Services	IAM, VPC, EC2, ECR, S3, CLI — with full CI/CD projects via SSH and SSM	react-nodejs-example/ — React + Node.js API (Webpack) + Dockerfile js-app-db/ — Node.js + MongoDB + docker-compose AWS-exercises/ : Node.js app with Jenkinsfile and docker-compose jma-ssh-dockerhub-ec2/ — Java Maven app -> Git -> Jenkins -> Docker Hub -> EC2 via SSH jma-ssm-ecr-ec2/ — Java Maven app -> Git -> Jenkins -> ECR -> EC2 via SSM (IAM policies) + Docker Compose SSH-vs-SSM.drawio — architecture comparison
Kubernetes Orchestration	Core components architecture Minikube/kubectl YAML manifests Namespaces Services Ingress + TLS Gateway API Volumes ConfigMap/Secret	nginx-deployment.yaml / nginx-service.yaml — basic Deployment + Service MongoDB-Express-Deployment/ — MongoDB + Mongo Express, Secret + ConfigMap, NodePort access Test_Services/nginx-deployment.yaml — Pod replication across nodes Test_Services/nginx-dpl-svc.NodePort.yaml — NodePort service demo Test_Services/nginx-dpl-svc.LoadBalancer.yaml — LoadBalancer service (minikube tunnel) Test_Services/nginx-prometheus-deploy.yaml — multi-port named service (nginx + exporter) Test_Services/mongodb-replicaset.yaml — Headless service for StatefulSet Test_Services/nginx-ingress.yaml — Ingress routing Test_Ingress/ — dashboard Ingress + self-signed TLS Test_ConfigMap_Volume/Mosquitto_deployment/ — MQTT broker, ConfigMap + Secret mounted as volumes Test_ConfigMap_Volume/nginx_tls_to_ingress/ — TLS termination at Ingress Test_ConfigMap_Volume/nginx_tls_to_pods/ — end-to-end TLS re-encryption to Pods 11-Kubernetes_Checklist.pdf / kubectl_Quick_Reference_Kubernetes.pdf — reference docs
Kubernetes on AWS	EKS managed clusters

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PART 4 — DevOps Advanced (in progress)

Topic	Key Concepts	What's in the repo

• Terraform — Infrastructure as Code
• Python Automation Scripts
• Ansible — Automation Platform
• Prometheus — Monitoring

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🛠️ Technologies & Tools

and soon ...

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🔗 Resources

• 📝 Full Notes Website: Notes on my DevOps journey
• 🎓 Bootcamp: TechWorld with Nana — DevOps Bootcamp
• 🗺️ Roadmap: DevOps Roadmap
• 💼 LinkedIn: Cédric Tonquèze