Release notes from s3proxy

S3Proxy 3.0.0

2026-01-27T17:47:21Z

Add aws-s3-sdk provider, #940
Add OpenTelemetry Prometheus metrics with configurable port/host, #946
Deprecate aws-s3, azureblob, filesystem, s3, and transient storage backends
- Use aws-s3-sdk, azureblob-sdk, filesystem-nio2, and transient-nio2 instead
Fix azureblob multipart upload regression, #930
Fix server-side copy with Managed Identity in azureblob, #944

Thanks @klaudworks for opening pull requests to improve S3Proxy!

S3Proxy 2.9.0

2025-11-20T07:36:46Z

Add PrefixBlobStore, #907
Fix Content-Range response for EncryptedBlobStore, #921
Implement atomic conditional PutObject for azureblob-sdk, #902
Implement multipart upload for azureblob-sdk, #904

Thanks @captainpacket, @klaudworks, and @polarctos for opening pull requests to improve S3Proxy!

S3Proxy 2.8.0

2025-10-09T18:23:22Z

Add NoCacheBlobStore, #849
Emulate conditional PutObject, #732, #831
Fix EncryptedBlobStore error handling, #848
Replace fileupload2 dependency with Jetty
Support payload checksums, #806

Thanks @klaudworks and @polarctos for opening pull requests to improve S3Proxy!

S3Proxy 2.7.0

2025-08-22T00:21:21Z

Add latency blobstore middleware, #836
Allow null localIdentity with bucket locators, #781
Fix EncryptedBlobStore support for S3 compatible backends without ETag suffix, #825
Force Jetty header cache to be case-sensitive, #837
Ignore more new AWS checksum headers, #760, #765
Remove armv7 Docker image, #826
Return PRIVATE permissions for non-POSIX systems, #816
Use dumb-init as init system for Docker image, #793

Thanks @lukaszherman, @musabshak, @Phantom-101, @polarctos, and @re1709 for opening pull requests to improve S3Proxy!

S3Proxy 2.6.0

2025-02-02T04:35:50Z

Change Docker storage backend to filesystem-nio2
Fix insecure path traversal in filesystem and filesystem-nio2, #769
Ignore new AWS checksum headers, #765
Run s3-tests against Minio in CI, #744
Support IRSA for aws-s3 provider, #749
Support JSON logging, #764
Upgrade to Apache jclouds 2.7.0, #468, #708, #746

Thanks @Anhui-tqhuang and @ryanfaircloth for opening pull requests to improve S3Proxy!
Also thanks @nicowaisman for privately reporting a security vulnerability.

S3Proxy 2.5.0

2025-02-02T03:22:25Z

Add filesystem-nio2 storage backend
Run s3-tests against Azurite in CI

S3Proxy 2.4.1

2024-12-27T02:51:15Z

Multiple fixes for the transient-nio2 storage backend

S3Proxy 2.4.0

2024-11-23T06:37:25Z

Add azureblob-sdk storage backend which supports other authentication mechanisms
Add middleware to replace user metadata
Add transient-nio2 storage backend
Allow setting service-path config when running via Docker
Ignore x-amz-te: append-md5 request header
Ignore part checksums in CompleteMultipartUpload
Improve testing by using Azurite in CI
Set outputLength correctly on open ended range requests to encryptedBlobStore
Support SSL setup via SSLContext in S3Proxy.Builder

Thanks @bersti, @ferjm, @hermandavid, @ptemarvelde, and @ZHAO-SHI-HAO for opening pull requests to improve S3Proxy!

S3Proxy 2.3.0

2024-09-25T02:36:23Z

Allow x-amz-user-agent header
Add middleware to override storage class
Adds feature allowing Access-Control-Expose-Headers configuration
Configure maximum-timeskew with environment variable
Fix time skew validation for presigned urls
Look up HTTP headers while ignoring case
Remove timestamp validation for requests that use query string authentication

Thanks @losfair, @sullis, @timuralp, @timursaikaliev, @twickline, and @vilmosnagy for opening pull request to improve S3Proxy!

S3Proxy 2.2.0

2024-03-10T07:53:23Z

Add DELETE and HEAD methods for CORS and CORS headers for all responses, #565
Add regex middleware, #495
Atomically replace objects in filesystem putBlob, apache/jclouds#162
Change Docker base image to eclipse-temurin, #564
CommonPrefixes is only for delimiter request; check size and tier null, #574
Fix race condition with transient getBlob, apache/jclouds#150
Improve performance of filesystem ListObjects with prefix and delimiter, apache/jclouds#161, apache/jclouds#164
Increase max non-chunked request size to 128 MB, #579
Set Jetty legacy URI compliance
Upgrade to Apache jclouds 2.6.0 with many bug fixes

Thanks @alifirat, @jixinchi, @larshagencognite, @ryanfaircloth, @snpz, @srstsavage, and @steven-sheehy for opening pull request to improve S3Proxy!