Docker Compose with Data Persistence Lab

🛠 Lab from the Platform Engineering Bootcamp. Used in Week 7. Bootcamp landing page: https://academy.tekanaid.com/bootcamps/platform-engineering-bootcamp Parent course(s):

• Week 7: Docker Fundamentals (slug: docker-fundamentals)

🟡 Beta bootcamp lab. Hands-on instructions, check scripts, and solve scripts are in place. Lab is part of the running TaskFlow project that grows across all 21 weeks of the bootcamp.

Build on the real TaskFlow repository you containerized in the previous lab (dockerize-taskflow-frontend-backend). You'll write a docker-compose.yml from scratch that orchestrates all four services (frontend, backend, PostgreSQL, Redis) with proper networking, health checks, and persistent volumes.

The real backend has database and auth libraries pinned in requirements.txt but no code that uses them yet, that integration lands in a later bootcamp week. So instead of faking a connection the app doesn't have, you'll stand up PostgreSQL and Redis as real infrastructure and verify each one directly with psql and redis-cli. In the final task, you'll tear the whole stack down, bring it back up, and prove your data survived, then compare your Compose file against the repo's own original.

By the end of this lab, you'll understand:

• Docker Compose service orchestration with build contexts
• Named volumes for data persistence
• Service dependencies and health checks (depends_on with condition: service_healthy)
• Docker networking between containers
• Backup strategies for named volumes
• Verifying data persistence across a full container teardown and restart