• leo_gateway, LeoGateway is one of the core components of LeoFS. Main roles are described below.
  • LeoFS's Gateway use Cowboy as Erlang's HTTP server.
  • Able to speak Amazon S3 compatible REST API.
  • Implemented a subset of Caching in HTTP(RFC2616).
• The detail document is here.
• leo_gateway uses rebar build system. Makefile so that simply running "make" at the top level should work.
• leo_gateway requires Erlang R16B03-1 or later.

LeoGateway consists of the fast HTTP-Server - Cowboy, the API handler and the cache mecanism. It provides the REST-API and Amazon S3-API. You’re able to easily access LeoFS with S3-Clients such as s3cmd, DragonDisk, program languages - Erlang, Java, Ruby, Python, Go and so on.

A client requests an object or a bucket operation to LeoGateway then LeoGateway requests the message of operation to a storage-node.

A destination storage node is decided by the routing-table. It is called RING, routing-table which is generated and provided at LeoFS Manager and which is based on consistent-hashing.

Also, LeoGateway provides built-in support for the object-cache mechanism in order to realize Keeping high performance and reduction of traffic between LeoGateway and LeoFS Storage.

LeoProject/LeoFS is sponsored by Rakuten, Inc. and supported by Rakuten Institute of Technology.