S3 Compatibility status

10 min

DISCLAIMER

The compatibility list for other platforms is given only for informational purposes and based on available documentation. They are sometimes completed, in a best effort approach, with the source code and inputs from maintainers when documentation is lacking. We are not proactively monitoring new versions of each software: check the modification history to know when the page has been updated for the last time. Some entries will be inexact or outdated. For any serious decision, you must make your own tests. The official documentation of each project can be accessed by clicking on the project name in the column header.

Feel free to open a PR to suggest fixes this table. Minio is missing because they do not provide a public S3 compatibility list.

Update history

2022-02-07 - First version of this page
2022-05-25 - Many Ceph S3 endpoints are not documented but implemented. Following a notification from the Ceph community, we added them.

High-level features

Feature	Garage	Openstack Swift	Ceph Object Gateway	Riak CS	OpenIO
signature v2 (deprecated)	❌ Missing	✅	✅	✅	✅
signature v4	✅ Implemented	✅	✅	❌	✅
URL path-style (eg. `host.tld/bucket/key`)	✅ Implemented	✅	✅	❓	✅
URL vhost-style URL (eg. `bucket.host.tld/key`)	✅ Implemented	❌	✅	✅	✅
Presigned URLs	✅ Implemented	❌	✅	✅	✅(❓)
SSE-C encryption	✅ Implemented	❓	✅	❌	✅

Note: OpenIO does not says if it supports presigned URLs. Because it is part of signature v4 and they claim they support it without additional precisions, we suppose that OpenIO supports presigned URLs.

Endpoint implementation

All endpoints that are missing on Garage will return a 501 Not Implemented. Some x-amz- headers are not implemented.

Core endoints

Endpoint	Garage	Openstack Swift	Ceph Object Gateway	Riak CS	OpenIO
CreateBucket	✅ Implemented	✅	✅	✅	✅
DeleteBucket	✅ Implemented	✅	✅	✅	✅
GetBucketLocation	✅ Implemented	✅	✅	❌	✅
HeadBucket	✅ Implemented	✅	✅	✅	✅
ListBuckets	✅ Implemented	❌	✅	✅	✅
HeadObject	✅ Implemented	✅	✅	✅	✅
CopyObject	✅ Implemented	✅	✅	✅	✅
DeleteObject	✅ Implemented	✅	✅	✅	✅
DeleteObjects	✅ Implemented	✅	✅	✅	✅
GetObject	✅ Implemented	✅	✅	✅	✅
ListObjects	✅ Implemented (see details below)	✅	✅	✅	❌
ListObjectsV2	✅ Implemented	❌	✅	❌	✅
PostObject	✅ Implemented	❌	✅	❌	❌
PutObject	✅ Implemented	✅	✅	✅	✅

ListObjects: Implemented, but there isn't a very good specification of what encoding-type=url covers so there might be some encoding bugs. In our implementation the url-encoded fields are in the same in ListObjects as they are in ListObjectsV2.

Note: Ceph API documentation is incomplete and lacks at least HeadBucket and UploadPartCopy, but these endpoints are documented in Red Hat Ceph Storage - Chapter 2. Ceph Object Gateway and the S3 API

Multipart Upload endpoints

Endpoint	Garage	Openstack Swift	Ceph Object Gateway	Riak CS	OpenIO
AbortMultipartUpload	✅ Implemented	✅	✅	✅	✅
CompleteMultipartUpload	✅ Implemented	✅	✅	✅	✅
CreateMultipartUpload	✅ Implemented	✅	✅	✅	✅
ListMultipartUpload	✅ Implemented	✅	✅	✅	✅
ListParts	✅ Implemented	✅	✅	✅	✅
UploadPart	✅ Implemented	✅	✅	✅	✅
UploadPartCopy	✅ Implemented	✅	✅	✅	✅

Website endpoints

Endpoint	Garage	Openstack Swift	Ceph Object Gateway	Riak CS	OpenIO
DeleteBucketWebsite	✅ Implemented	❌	❌	❌	❌
GetBucketWebsite	✅ Implemented	❌	❌	❌	❌
PutBucketWebsite	⚠ Partially implemented (see below)	❌	❌	❌	❌
DeleteBucketCors	✅ Implemented	❌	✅	❌	✅
GetBucketCors	✅ Implemented	❌	✅	❌	✅
PutBucketCors	✅ Implemented	❌	✅	❌	✅

PutBucketWebsite: Implemented, but only stores the index document suffix and the error document path. Redirects are not supported.

Note: Ceph radosgw has some support for static websites but it is different from the Amazon one. It also does not implement its configuration endpoints.

ACL, Policies endpoints

Amazon has 2 access control mechanisms in S3: ACL (legacy) and policies (new one). Garage implements none of them, and has its own system instead, built around a per-access-key-per-bucket logic. See Garage CLI reference manual to learn how to use Garage's permission system.

Endpoint	Garage	Openstack Swift	Ceph Object Gateway	Riak CS	OpenIO
DeleteBucketPolicy	❌ Missing	❌	✅	✅	❌
GetBucketPolicy	❌ Missing	❌	✅	⚠	❌
GetBucketPolicyStatus	❌ Missing	❌	✅	❌	❌
PutBucketPolicy	❌ Missing	❌	✅	⚠	❌
GetBucketAcl	❌ Missing	✅	✅	✅	✅
PutBucketAcl	❌ Missing	✅	✅	✅	✅
GetObjectAcl	❌ Missing	✅	✅	✅	✅
PutObjectAcl	❌ Missing	✅	✅	✅	✅

Notes: Riak CS only supports a subset of the policy configuration.

Versioning, Lifecycle endpoints

Garage does not (yet) support object versioning. If you need this feature, please share your use case in our dedicated issue.

Endpoint	Garage	Openstack Swift	Ceph Object Gateway	Riak CS	OpenIO
DeleteBucketLifecycle	✅ Implemented	❌	✅	❌	✅
GetBucketLifecycleConfiguration	✅ Implemented	❌	✅	❌	✅
PutBucketLifecycleConfiguration	⚠ Partially implemented (see below)	❌	✅	❌	✅
GetBucketVersioning	❌ Stub (see below)	✅	✅	❌	✅
ListObjectVersions	❌ Missing	❌	✅	❌	✅
PutBucketVersioning	❌ Missing	❌	✅	❌	✅

PutBucketLifecycleConfiguration: The only actions supported are AbortIncompleteMultipartUpload and Expiration (without the ExpiredObjectDeleteMarker field). All other operations are dependent on either bucket versionning or storage classes which Garage currently does not implement. The deprecated Prefix member directly in the the Rule structure/XML tag is not supported, specified prefixes must be inside the Filter structure/XML tag.

GetBucketVersioning: Stub implementation which always returns "versionning not enabled", since Garage does not yet support bucket versionning.

Replication endpoints

Please open an issue if you have a use case for replication.

Endpoint	Garage	Openstack Swift	Ceph Object Gateway	Riak CS	OpenIO
DeleteBucketReplication	❌ Missing	❌	✅	❌	❌
GetBucketReplication	❌ Missing	❌	✅	❌	❌
PutBucketReplication	❌ Missing	❌	⚠	❌	❌

Note: Ceph documentation briefly says that Ceph supports replication through the S3 API but with some limitations. Additionaly, replication endpoints are not documented in the S3 compatibility page so I don't know what kind of support we can expect.

Locking objects

Amazon defines a concept of object locking that can be achieved either through a Retention period or a Legal hold.

Endpoint	Garage	Openstack Swift	Ceph Object Gateway	Riak CS	OpenIO
GetObjectLegalHold	❌ Missing	❌	✅	❌	❌
PutObjectLegalHold	❌ Missing	❌	✅	❌	❌
GetObjectRetention	❌ Missing	❌	✅	❌	❌
PutObjectRetention	❌ Missing	❌	✅	❌	❌
GetObjectLockConfiguration	❌ Missing	❌	✅	❌	❌
PutObjectLockConfiguration	❌ Missing	❌	✅	❌	❌

(Server-side) encryption

We think that you can either encrypt your server partition or do client-side encryption, so we did not implement server-side encryption for Garage. Please open an issue if you have a use case.

Endpoint	Garage	Openstack Swift	Ceph Object Gateway	Riak CS	OpenIO
DeleteBucketEncryption	❌ Missing	❌	✅	❌	❌
GetBucketEncryption	❌ Missing	❌	✅	❌	❌
PutBucketEncryption	❌ Missing	❌	✅	❌	❌

Misc endpoints

Endpoint	Garage	Openstack Swift	Ceph Object Gateway	Riak CS	OpenIO
GetBucketNotificationConfiguration	❌ Missing	❌	✅	❌	❌
PutBucketNotificationConfiguration	❌ Missing	❌	✅	❌	❌
DeleteBucketTagging	❌ Missing	❌	✅	❌	✅
GetBucketTagging	❌ Missing	❌	✅	❌	✅
PutBucketTagging	❌ Missing	❌	✅	❌	✅
DeleteObjectTagging	❌ Missing	❌	✅	❌	✅
GetObjectTagging	❌ Missing	❌	✅	❌	✅
PutObjectTagging	❌ Missing	❌	✅	❌	✅
GetObjectTorrent	❌ Missing	❌	✅	❌	❌

Vendor specific endpoints

Display Amazon specifc endpoints

Endpoint	Garage	Openstack Swift	Ceph Object Gateway	Riak CS	OpenIO
DeleteBucketAnalyticsConfiguration	❌ Missing	❌	❌	❌	❌
DeleteBucketIntelligentTieringConfiguration	❌ Missing	❌	❌	❌	❌
DeleteBucketInventoryConfiguration	❌ Missing	❌	❌	❌	❌
DeleteBucketMetricsConfiguration	❌ Missing	❌	❌	❌	❌
DeleteBucketOwnershipControls	❌ Missing	❌	❌	❌	❌
DeletePublicAccessBlock	❌ Missing	❌	❌	❌	❌
GetBucketAccelerateConfiguration	❌ Missing	❌	❌	❌	❌
GetBucketAnalyticsConfiguration	❌ Missing	❌	❌	❌	❌
GetBucketIntelligentTieringConfiguration	❌ Missing	❌	❌	❌	❌
GetBucketInventoryConfiguration	❌ Missing	❌	❌	❌	❌
GetBucketLogging	❌ Missing	❌	❌	❌	❌
GetBucketMetricsConfiguration	❌ Missing	❌	❌	❌	❌
GetBucketOwnershipControls	❌ Missing	❌	❌	❌	❌
GetBucketRequestPayment	❌ Missing	❌	❌	❌	❌
GetPublicAccessBlock	❌ Missing	❌	❌	❌	❌
ListBucketAnalyticsConfigurations	❌ Missing	❌	❌	❌	❌
ListBucketIntelligentTieringConfigurations	❌ Missing	❌	❌	❌	❌
ListBucketInventoryConfigurations	❌ Missing	❌	❌	❌	❌
ListBucketMetricsConfigurations	❌ Missing	❌	❌	❌	❌
PutBucketAccelerateConfiguration	❌ Missing	❌	❌	❌	❌
PutBucketAnalyticsConfiguration	❌ Missing	❌	❌	❌	❌
PutBucketIntelligentTieringConfiguration	❌ Missing	❌	❌	❌	❌
PutBucketInventoryConfiguration	❌ Missing	❌	❌	❌	❌
PutBucketLogging	❌ Missing	❌	❌	❌	❌
PutBucketMetricsConfiguration	❌ Missing	❌	❌	❌	❌
PutBucketOwnershipControls	❌ Missing	❌	❌	❌	❌
PutBucketRequestPayment	❌ Missing	❌	❌	❌	❌
PutPublicAccessBlock	❌ Missing	❌	❌	❌	❌
RestoreObject	❌ Missing	❌	❌	❌	❌
SelectObjectContent	❌ Missing	❌	❌	❌	❌