S3Proxy implements the S3 API and proxies requests, enabling several use cases:
- translation from S3 to Backblaze B2, EMC Atmos, Google Cloud, Microsoft Azure, and OpenStack Swift
- testing without Amazon by using the local filesystem
- extension via middlewares
- embedding into Java applications
Docker Hub hosts a Docker image and has instructions on how to run it.
Users can download releases
from GitHub. Developers can build the project by running mvn package which
produces a binary at target/s3proxy. S3Proxy requires Java 8 or newer to run.
Configure S3Proxy via a properties file. An example using the local file system as the storage backend with anonymous access:
s3proxy.authorization=none
s3proxy.endpoint=http://127.0.0.1:8080
jclouds.provider=filesystem
jclouds.filesystem.basedir=/tmp/s3proxy
First create the filesystem basedir:
mkdir /tmp/s3proxy
Next run S3Proxy. Linux and Mac OS X users can run the executable jar:
chmod +x s3proxy
s3proxy --properties s3proxy.conf
Windows users must explicitly invoke java:
java -jar s3proxy --properties s3proxy.conf
Finally test by creating a bucket then listing all the buckets:
$ curl --request PUT http://localhost:8080/testbucket
$ curl http://localhost:8080/
<?xml version="1.0" ?><ListAllMyBucketsResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/"><Owner><ID>75aa57f09aa0c8caeab4f8c24e99d10f8e7faeebf76c078efc7c6caea54ba06a</ID><DisplayName>CustomersName@amazon.com</DisplayName></Owner><Buckets><Bucket><Name>testbucket</Name><CreationDate>2015-08-05T22:16:24.000Z</CreationDate></Bucket></Buckets></ListAllMyBucketsResult>
Maven Central hosts S3Proxy artifacts and the wiki has instructions on Java use.
- atmos
- aws-s3 (Amazon-only)
- azureblob
- b2
- filesystem (on-disk storage)
- google-cloud-storage
- openstack-swift
- rackspace-cloudfiles-uk and rackspace-cloudfiles-us
- s3 (all implementations)
- transient (in-memory storage)
See the wiki for examples of configurations.
S3Proxy can modify its behavior based on middlewares:
S3Proxy has broad compatibility with the S3 API, however, it does not support:
- ACLs other than private and public-read
- BitTorrent hosting
- bucket logging
- bucket policies
- CORS bucket operations like getting or setting the CORS configuration for a bucket. S3Proxy only supports a static configuration (see below).
- hosting static websites
- object server-side encryption
- object tagging
- object versioning, see #74
- POST upload policies, see #73
- requester pays buckets
- select object content
S3Proxy emulates the following operations:
- copy multi-part objects, see #76
S3Proxy has basic CORS preflight and actual request/response handling. It can be configured within the properties file (and corresponding ENV variables for Docker):
s3proxy.cors-allow-origins=https://example\.com https://.+\.example\.com https://example\.cloud
s3proxy.cors-allow-methods=GET PUT
s3proxy.cors-allow-headers=Accept Content-Type
CORS cannot be configured per bucket. s3proxy.cors-allow-all=true will accept any origin and header.
Actual CORS requests are supported for GET, PUT and POST methods.
The wiki collects compatibility notes for specific storage backends.
- Apache jclouds provides storage backend support for S3Proxy
- Ceph s3-tests help maintain and improve compatibility with the S3 API
- fake-s3, gofakes3, S3 ninja, and s3rver provide functionality similar to S3Proxy when using the filesystem backend
- GlacierProxy and SwiftProxy provide similar functionality for the Amazon Glacier and OpenStack Swift APIs
- minio and Zenko provide similar multi-cloud functionality
- s3mock mocks the S3 API for Java/Scala projects
- sbt-s3 runs S3Proxy via the Scala Build Tool
- swift3 provides an S3 middleware for OpenStack Swift
Copyright (C) 2014-2021 Andrew Gaul
Licensed under the Apache License, Version 2.0