DevOps Daily Labs — No Theory, Just Execution

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What This Is

A no-BS DevOps practice repo where every concept is tested through actual execution.

No passive learning. Only:

• commands
• containers
• break → fix → learn

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Philosophy

learn != read
learn = run + break + debug

If it didn’t run on my system, it doesn’t exist here.

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📁 Structure (Organized Chaos)

#### 📂 Structure (Organized Chaos)

```bash
devOps_Practs/
│
├── Unit-1-Docker-Basics/
│   ├── task1_container-basics/
│   ├── task2_container-lifecycle/
│   ├── task3_detached-persistent-container/
│   ├── task4_process-isolation/
│   ├── task5_images-and-layers/
│
├── Unit-2-Image-Building/
│   ├── task1_dockerfile-basic/
│   ├── task2_dockerfile-advanced/
│   ├── task3_build-context-ignore/
│   ├── task4_image-tagging-versioning/
│   ├── task5_container-networking/
│   ├── task6_port-mapping-webapp/
│   ├── task7_docker-volumes/
│   ├── task8_bind-mounts/
│   ├── task9_dockerhub-push/
│   └── task10_multi-container-communication/
│
├── Unit-3-DockerCompose/
│   ├── task1_docker-compose-basics/
│   ├── task2_multi-container-app/
│   ├── task3_environment-variables/
│   ├── task4_service-dependency/
│   ├── task5_nginx-node-mongodb/
│   ├── task6_wordpress-mysql/
│   ├── task7_compose-down-volumes/
│   └── task8_compose-build-custom-image/
│
├── Unit-4-Maven/
│   ├── task1_maven-project-setup/
│   ├── task2_maven-lifecycle/
│   ├── task3_pom-dependencies/
│   ├── task4_build-jar/
│   ├── task5_maven-docker-integration/
│   └── task6_dockerize-maven-app/
│
├── Unit-5-GitHub-Actions/
│   ├── task1_basic-workflow/
│   ├── task2_push-trigger/
│   ├── task3_build-docker-image/
│   ├── task4_push-to-dockerhub/
│   ├── task5_multi-job-workflow/
│   └── task6_deploy-workflow/
│
├── Unit-6-Jenkins/
│   ├── task1_jenkins-setup/
│   ├── task2_freestyle-job/
│   ├── task3_pipeline-job/
│   ├── task4_jenkinsfile/
│   ├── task5_maven-build/
│   ├── task6_docker-integration/
│   └── task7_ci-cd-pipeline/
│
└── README.md

Each folder = one concept → one execution → one proof

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What I Actually Did

• Ran containers (and killed them)
• Broke containers (accidentally and intentionally)
• Built images from scratch
• Understood why containers stop (not just “they stop”)
• Tested isolation (not just read namespaces)
• Created persistent containers (not fake demos)

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Stack

• Docker (core weapon)
• Linux containers (Ubuntu, Nginx, etc.)
• Git + GitHub (versioned learning)
• Terminal (where real work happens)

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Proof > Words

Every task contains:

• commands executed
• outputs
• screenshots

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Current Status

+ Unit 1: Docker Basics → DONE
~ Unit 2: Image Building → IN PROGRESS
- Next: Real-world container projects

Next Targets

• Multi-container apps
• Docker Compose
• Real app containerization
• DevOps pipelines

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Author

Ritesh Kumar Paswan
Future DevOps / Data Engineer (working on becoming one)

• GitHub: https://github.com/Ritesh2332
• LinkedIn: https://www.linkedin.com/in/ritesh232

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