Docker Volumes Explained: Your Data NEVER Dies! (Persistence Demo with PostgreSQL)
🐳 Ever lost ALL your database data just because you ran "docker compose down"?
In this video, I'll show you EXACTLY why that happens — and how Docker Named
Volumes fix it permanently.
We build a real full-stack app (Node.js + PostgreSQL) from scratch and run
through a live demo so you can SEE the difference between data loss and
data persistence with your own eyes.
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⏱️ TIMESTAMPS
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00:00 - Intro: The problem with Docker data
01:30 - Project overview: BookShelf app (Node.js + PostgreSQL)
03:00 - DEMO 1: Without volumes → data vanishes after container delete
06:00 - Docker volume creation & inspection (docker volume inspect)
09:00 - DEMO 2: With named volumes → data survives container deletion
13:00 - How volumes work under the hood (/var/lib/docker/volumes/)
15:30 - Volume backup & cleanup commands
17:00 - Recap & what to learn next
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📦 WHAT YOU'LL LEARN
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✅ Why Docker containers lose data on deletion
✅ What Docker Named Volumes are and how they work
✅ How to create, inspect, and manage volumes
✅ The difference between bind mounts vs named volumes
✅ How to persist PostgreSQL data across container restarts
✅ Volume backup and cleanup strategies
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🔧 TECH STACK
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Docker + Docker Compose
PostgreSQL 15
Node.js + Express
Named Volumes (local driver)
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📂 SOURCE CODE
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⭐ GitHub:https://github.com/anulsasidharan/Boo...
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🔑 KEY COMMANDS IN THIS VIDEO
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docker volume create bookshelf_postgres_data
docker volume inspect bookshelf_postgres_data
docker volume ls
docker compose up -d
docker compose down
docker compose down --volumes
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📺 MORE FROM ORIONVEXA
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💼 LinkedIn: / anulsasidharan
🐙 GitHub: https://github.com/anulsasidharan
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