Final Learning Roadmap

18. Final Learning Roadmap

🗺️ Complete Docker to DevOps Path

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  <text x="140" y="73" text-anchor="middle" font-size="12" font-weight="bold" fill="#1565c0">① Docker Basics</text>
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  <text x="370" y="73" text-anchor="middle" font-size="12" font-weight="bold" fill="#2e7d32">② Dockerfile Mastery</text>
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  <text x="590" y="73" text-anchor="middle" font-size="12" font-weight="bold" fill="#e65100">③ Docker Compose</text>
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  <text x="590" y="104" text-anchor="middle" font-size="9" fill="#555">Real projects</text>

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  <text x="590" y="183" text-anchor="middle" font-size="12" font-weight="bold" fill="#6a1b9a">④ Production Docker</text>
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  <text x="590" y="214" text-anchor="middle" font-size="9" fill="#555">CI/CD Pipelines</text>

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  <text x="370" y="183" text-anchor="middle" font-size="12" font-weight="bold" fill="#880e4f">⑤ Docker Swarm</text>
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  <text x="140" y="293" text-anchor="middle" font-size="12" font-weight="bold" fill="#1b5e20">⑦ GitOps / ArgoCD</text>
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  <text x="370" y="293" text-anchor="middle" font-size="12" font-weight="bold" fill="#01579b">⑧ Observability</text>
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  <text x="370" y="324" text-anchor="middle" font-size="9" fill="#555">Loki, Jaeger</text>

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  <text x="590" y="293" text-anchor="middle" font-size="12" font-weight="bold" fill="#7f0000">⑨ DevSecOps</text>
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  <text x="590" y="324" text-anchor="middle" font-size="9" fill="#555">Policy as Code</text>

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  <text x="350" y="375" text-anchor="middle" font-size="12" font-weight="bold" fill="#444">Estimated Timeline</text>
  <text x="350" y="395" text-anchor="middle" font-size="10" fill="#555">① – ③: 2–4 weeks (fundamentals + compose)</text>
  <text x="350" y="413" text-anchor="middle" font-size="10" fill="#555">④ – ⑤: 2–4 weeks (production + swarm)</text>
  <text x="350" y="431" text-anchor="middle" font-size="10" fill="#555">⑥ – ⑦: 4–8 weeks (Kubernetes + GitOps)</text>
  <text x="350" y="449" text-anchor="middle" font-size="10" fill="#555">⑧ – ⑨: 2–4 weeks (observability + security)</text>
  <text x="350" y="467" text-anchor="middle" font-size="10" fill="#888">Practice daily — build real projects at each stage</text>
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👨‍💻 Role-Specific Advice

Backend Developers

Priority: Dockerfile → Compose → Volumes → Networking → CI/CD
Focus on: Containerizing APIs, database setup, secrets, health checks
Projects: Containerize your existing REST API or service

Frontend Developers

Priority: Dockerfile → Compose → Nginx → Multi-stage → CI/CD
Focus on: Multi-stage builds for React/Next.js, Nginx serving, CDN
Projects: Containerize a React app with Nginx reverse proxy

DevOps Engineers

Priority: All sections + Swarm → Kubernetes → Monitoring → Security
Focus on: Production architecture, CI/CD pipelines, security scanning, scaling
Projects: Full production stack with monitoring, CI/CD, and auto-scaling

📚 Recommended Resources

Resource	Type	Level
docs.docker.com	Official docs	All
Docker Deep Dive (Nigel Poulton)	Book	Beginner
Play with Docker	Interactive	All
KodeKloud Docker course	Video	Beginner-Intermediate
Kubernetes Up & Running	Book	Advanced
killer.sh	Practice exams	Advanced

🔑 The 10 Commands Every Docker Engineer Must Know

docker build -t myapp:1.0 .                    # Build an image
docker run -d -p 3000:3000 --name api myapp    # Run a container
docker compose up -d --build                   # Start compose stack
docker logs -f api                             # Follow logs
docker exec -it api sh                         # Enter container
docker stats --no-stream                       # Resource snapshot
docker system df                               # Disk usage
docker image prune -a                          # Clean images
docker compose down -v                         # Full teardown
docker inspect api | grep -i "ipaddr\|port"    # Network info

🏁 You’ve reached the end of Advanced Docker. The best way to solidify this knowledge is to build something real — take an existing project and containerize it end-to-end: write the Dockerfile, set up Compose, add a CI/CD pipeline, and deploy it. Every concept here will click the moment you struggle through a real problem and solve it.

Documentation version: 2.0 | Last updated: 2025 | Covers Docker Engine 24.x+ and Compose v2