## Overview
This PR adds support for **Single Bucket Mode** in RAGFlow, allowing
users to configure MinIO/S3 to use a single bucket with a directory
structure instead of creating multiple buckets per Knowledge Base and
user folder.
## Problem Statement
The current implementation creates one bucket per Knowledge Base and one
bucket per user folder, which can be problematic when:
- Cloud providers charge per bucket
- IAM policies restrict bucket creation
- Organizations want centralized data management in a single bucket
## Solution
Added a `prefix_path` configuration option to the MinIO connector that
enables:
- Using a single bucket with directory-based organization
- Backward compatibility with existing multi-bucket deployments
- Support for MinIO, AWS S3, and other S3-compatible storage backends
## Changes
- **`rag/utils/minio_conn.py`**: Enhanced MinIO connector to support
single bucket mode with prefix paths
- **`conf/service_conf.yaml`**: Added new configuration options
(`bucket` and `prefix_path`)
- **`docker/service_conf.yaml.template`**: Updated template with single
bucket configuration examples
- **`docker/.env.single-bucket-example`**: Added example environment
variables for single bucket setup
- **`docs/single-bucket-mode.md`**: Comprehensive documentation covering
usage, migration, and troubleshooting
## Configuration Example
```yaml
minio:
user: "access-key"
password: "secret-key"
host: "minio.example.com:443"
bucket: "ragflow-bucket" # Single bucket name
prefix_path: "ragflow" # Optional prefix path
```
## Backward Compatibility
✅ Fully backward compatible - existing deployments continue to work
without any changes
- If `bucket` is not configured, uses default multi-bucket behavior
- If `bucket` is configured without `prefix_path`, uses bucket root
- If both are configured, uses `bucket/prefix_path/` structure
## Testing
- Tested with MinIO (local and cloud)
- Verified backward compatibility with existing multi-bucket mode
- Validated IAM policy restrictions work correctly
## Documentation
Included comprehensive documentation in `docs/single-bucket-mode.md`
covering:
- Configuration examples
- Migration guide from multi-bucket to single-bucket mode
- IAM policy examples
- Troubleshooting guide
---
**Related Issue**: Addresses use cases where bucket creation is
restricted or costly
