normogen/backend/DAILY-SUMMARY.md

Today's Docker Issues - Summary and Solutions

Date: 2026-02-15

Issues Fixed

1. Edition 2024 Error

Problem: Rust 1.83-alpine didn't support Edition 2024 Solution: Updated Dockerfiles to use Rust 1.93-slim Files Modified:

• backend/docker/Dockerfile
• backend/docker/Dockerfile.dev Documentation: backend/docker/EDITION2024-FIX.md

2. MongoDB Healthcheck Configuration

Problem: Healthcheck timing out, complex command Solution: Simplified healthcheck with 60s startup grace period Files Modified:

• backend/docker-compose.dev.yml Documentation: backend/docker/MONGODB-TROUBLESHOOTING.md

3. MongoDB Disk Space Issue

Problem: MongoDB crashing with "No space left on device" error Root Cause: /var filesystem was 100% full (not root / filesystem) Solution: Freed up space in /var filesystem Key Insight: Docker stores volumes in /var/lib/docker/volumes/, so /var space matters more than root space for MongoDB Documentation: backend/docker/MONGODB-VAR-FULL-ISSUE.md

Lessons Learned

1. Always check all filesystems with df -h, not just root (/)
2. Docker data location matters - /var/lib/docker by default
3. Separate mounts have different space - /var can be full while / has space
4. Monitor Docker space usage regularly with docker system df

Prevention Setup

Regular Monitoring

Add to crontab:

# Check disk space every hour
0 * * * * /path/to/normogen/backend/scripts/check-disk-space.sh

# Clean Docker weekly
0 2 * * 0 docker system prune -f --filter "until=168h"

Manual Checks

# Quick space check
df -h

# Docker space usage
docker system df

# Verify stack is running
./backend/scripts/verify-stack.sh

Documentation Created

1. backend/docker/EDITION2024-FIX.md - Edition 2024 fix
2. backend/docker/MONGODB-TROUBLESHOOTING.md - MongoDB issues
3. backend/docker/MONGODB-PERMISSIONS-FIX.md - Permissions guide
4. backend/docker/MONGODB-DISKSPACE-FIX.md - Disk space guide
5. backend/docker/MONGODB-VAR-FULL-ISSUE.md - /var space issue
6. backend/docker/DOCKER-COMMANDS.md - Docker commands reference
7. backend/scripts/check-disk-space.sh - Space monitoring
8. backend/scripts/verify-stack.sh - Stack verification
9. backend/diagnose-mongodb.sh - MongoDB diagnostics

Quick Reference

Start the Stack

cd backend
docker compose -f docker-compose.dev.yml up -d

Check Status

docker compose -f docker-compose.dev.yml ps
docker ps | grep normogen

View Logs

# All services
docker compose -f docker-compose.dev.yml logs -f

# MongoDB only
docker logs -f normogen-mongodb-dev

# Backend only
docker logs -f normogen-backend-dev

Stop the Stack

docker compose -f docker-compose.dev.yml down

Clean Restart

docker compose -f docker-compose.dev.yml down -v
docker compose -f docker-compose.dev.yml up -d

Success Indicators

When everything is working, you should see:

1. Containers running:

   $ docker ps | grep normogen
   normogen-mongodb-dev   Up X minutes (healthy)   0.0.0.0:27017->27017/tcp
   normogen-backend-dev   Up X minutes            0.0.0.0:6800->8000/tcp
   

2. MongoDB logs:

   {"msg":"Waiting for connections on port 27017"}
   

3. Backend logs:

   Server is running on http://0.0.0.0:8000
   

4. Healthcheck:

   $ docker inspect normogen-mongodb-dev --format='{{.State.Health.Status}}'
   healthy
   

Git Commits

1. d63f160 - fix(docker): Update to Rust 1.93 to support Edition 2024
2. b218594 - fix(docker): Fix MongoDB healthcheck configuration
3. b068579 - fix(docker): Simplify MongoDB healthcheck and add troubleshooting
4. f0b5109 - fix(docker): Document MongoDB disk space issue and solutions

Next Steps

1. Build completed successfully
2. /var space issue resolved
3. Verify stack is running with ./backend/scripts/verify-stack.sh
4. Test API endpoints
5. Continue with Phase 2.4 development

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Last Updated: 2026-02-15 Status: All issues resolved