CloudServer
An open-source Amazon S3-compatible object storage server for local development and multi-cloud abstraction.
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Local AWS S3 emulator supporting multiple backends for dev/test.
Core Features
- Fully compatible with AWS S3 API
- Supports file, memory, and multiple cloud backends
- Location constraints for flexible data routing
- Docker one-liner deployment
- Part of Zenko multi-cloud ecosystem
What It Can't Do
- •Default credentials are public; change them before production use. Vault user management is proprietary (requires separate license). In-memory mode loses data on restart. Multiple backends require proper Location Constraint headers.
Use Cases
- Local integration testing in CI/CD pipelines
- Unified storage abstraction layer for hybrid/multi-cloud
- Offline or low-latency S3 development environment
- Educational and proof-of-concept setups
CloudServer (formerly S3 Server) is an open-source object storage server from Scality that provides a single AWS S3 API interface to access multiple backend storage systems, whether on-premise or in the cloud. It's part of the Zenko Multi-Cloud Data Controller ecosystem. Developers can use CloudServer to emulate AWS S3 locally for integration testing, or as an abstraction layer to build object-storage-enabled applications that work across different storage backends (file system, memory, or multiple backends with location constraints). It runs on Node.js and is easily deployed via Docker or source code.
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Getting Started
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Install the software
Double-click the downloaded installer and follow the prompts
Run with Docker: docker run -p 8000:8000 zenko/cloudserver
Or from source: git clone, cd cloudserver, yarn install --frozen-lockfile, yarn start
Server listens on port 8000 with default credentials accessKey1/verySecretKey1
- Run with Docker: docker run -p 8000:8000 zenko/cloudserver
- Or from source: git clone, cd cloudserver, yarn install --frozen-lockfile, yarn start
- Server listens on port 8000 with default credentials accessKey1/verySecretKey1
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Docker: docker rm -f <container>. Source: delete the cloned directory. Remove localData and localMetadata folders if you want to wipe data.
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