S3Proxy

S3Proxy allows applications using the S3 API to interface with a variety of object stores, e.g., EMC Atmos, Microsoft Azure, OpenStack Swift. It runs a local HTTP server which translates S3 operations into provider-specific operations. S3Proxy also allows developers to test against S3 without the cost or latency associated with using AWS by using the local file system.

Features

• create, remove, and list buckets (including user-specified regions)
• put, get, delete, and list objects
• store and retrieve object metadata, including user metadata

Supported object stores:

• atmos
• aws-s3
• azureblob
• cloudfiles-uk and cloudfiles-us
• filesystem (on-disk storage)
• hpcloud-objectstorage
• s3
• swift and swift-keystone
• transient (in-memory storage)

Installation

S3Proxy requires Java 7 to run. Presently there is no binary release but Bintray will host releases in the future.

One can build the project by running mvn package which produces a binary at target/s3proxy.

Examples

Linux and Mac OS users can run S3Proxy either via the executable jar or by explicitly invoking java:

s3proxy --properties s3proxy.conf
java -jar s3proxy --properties s3proxy.conf

Windows users must explicitly invoke java.

Configuration

Users can configure S3Proxy via a properties file. An example:

jclouds.provider=transient
jclouds.identity=identity
jclouds.credential=credential
# endpoint is optional for some providers
#jclouds.endpoint=http://127.0.0.1:8081
jclouds.filesystem.basedir=/tmp/blobstore

s3proxy.endpoint=http://127.0.0.1:8080
# authorization must be aws-v2 or none
s3proxy.authorization=aws-v2
s3proxy.identity=identity
s3proxy.credential=credential

Users can also set a variety of Java and jclouds properties.

Limitations

S3Proxy does not support:

• single-part uploads larger than 2 GB (upstream issue)
• multi-part uploads
• POST uploads
• bucket and object ACLs
• object metadata with filesystem provider (upstream issue)
• listening on HTTPS

References

Apache jclouds provides object store support for S3Proxy. Ceph s3-tests help maintain and improve compatibility with the S3 API.

License

Copyright (C) 2014 Andrew Gaul

Licensed under the Apache License, Version 2.0