voxblog/MIGRATION_COMPLETE.md

Database Variable Migration Complete ✅

Summary

All database configuration variables across the entire project have been successfully unified to use the DB_* prefix.

Files Updated

Configuration Files

• ✅ .env.example - Updated with unified DB_* variables
• ✅ docker-compose.yml - Uses DB_* variables with proper MySQL container mapping

Documentation Files

• ✅ QUICK_START.md - All references updated
• ✅ DATABASE_SETUP.md - All references updated
• ✅ DEPLOYMENT_SUMMARY.md - All references updated
• ✅ DEPLOYMENT_GUIDE.md - Docker compose example and GitHub Actions updated
• ✅ LOCAL_TESTING.md - All references updated

Migration Tools

• ✅ scripts/migrate-db-vars.sh - Helper script for existing installations
• ✅ docs/DB_VARIABLE_MIGRATION.md - Comprehensive migration guide
• ✅ DB_VARS_UNIFIED.md - Quick reference guide

Application Code

• ✅ apps/api/src/db.ts - Already using DB_* (no changes needed)
• ✅ apps/api/drizzle.config.ts - Already using DB_* (no changes needed)
• ✅ apps/api/src/db/migrate.ts - Already using DB_* (no changes needed)

Unified Variable Names

Variable	Purpose	Default
DB_ROOT_PASSWORD	MySQL root password	-
DB_PASSWORD	Application database password	-
DB_USER	Database username	voxblog
DB_NAME	Database name	voxblog
DB_HOST	Database host	mysql (docker) / localhost
DB_PORT	Database port	3306

What Was Changed

Before

# Mixed naming conventions
MYSQL_ROOT_PASSWORD=xxx
MYSQL_PASSWORD=xxx
DATABASE_URL=mysql://...
DB_HOST=mysql
DB_PORT=3306
DB_USER=voxblog
DB_PASSWORD=xxx  # Duplicate!
DB_NAME=voxblog

After

# Unified DB_* naming
DB_ROOT_PASSWORD=xxx
DB_PASSWORD=xxx
DB_USER=voxblog
DB_NAME=voxblog
DB_HOST=mysql
DB_PORT=3306

Benefits Achieved

1. ✅ Consistency - Single naming pattern across entire codebase
2. ✅ Simplicity - No more confusion about which variable to use
3. ✅ No Duplication - Removed redundant DATABASE_URL and duplicate password variables
4. ✅ Better Defaults - All variables have sensible defaults in docker-compose
5. ✅ Clear Documentation - All docs updated with correct variable names
6. ✅ Easy Migration - Script provided for existing installations

Verification

Run this to verify no legacy variables remain in your project:

# Should only show references in migration docs (as "before" examples)
grep -r "MYSQL_ROOT_PASSWORD\|MYSQL_PASSWORD" --include="*.md" --include="*.yml" --include="*.env*" .

Next Steps for Users

New Installations

Just use the updated .env.example:

cp .env.example .env
# Edit .env with your values
docker-compose up -d

Existing Installations

Run the migration script:

./scripts/migrate-db-vars.sh
docker-compose down
docker-compose up -d

Technical Notes

MySQL Container Mapping

The MySQL Docker container still requires MYSQL_* environment variables internally. Our docker-compose.yml handles this mapping:

mysql:
  environment:
    MYSQL_ROOT_PASSWORD: ${DB_ROOT_PASSWORD}  # Maps DB_* to MYSQL_*
    MYSQL_PASSWORD: ${DB_PASSWORD}
    MYSQL_USER: ${DB_USER:-voxblog}
    MYSQL_DATABASE: ${DB_NAME:-voxblog}

This is transparent to users - they only need to set DB_* variables.

Application Code

The application code in apps/api/src/db.ts and related files already used DB_* variables, so no code changes were needed. This migration was purely about configuration consistency.

Rollback (If Needed)

If you need to rollback for any reason:

# Restore your .env backup
cp .env.backup.YYYYMMDD_HHMMSS .env

# Or manually change:
DB_ROOT_PASSWORD → MYSQL_ROOT_PASSWORD
DB_PASSWORD → MYSQL_PASSWORD

However, we recommend moving forward with the unified naming as it's cleaner and more maintainable.

Support

• See docs/DB_VARIABLE_MIGRATION.md for detailed migration guide
• See DB_VARS_UNIFIED.md for quick reference
• Check docker-compose logs if services don't start: docker-compose logs

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Migration completed successfully! 🎉

All database variables are now unified under the DB_* prefix for consistency and simplicity.