Bucket Policies¶
New in version Luminous.
The Ceph Object Gateway supports a subset of the Amazon S3 policy language applied to buckets.
Creation and Removal¶
Bucket policies are managed through standard S3 operations rather than radosgw-admin.
For example, one may use s3cmd to set or delete a policy thus:
$ cat > examplepol
{
"Version": "2012-10-17",
"Statement": [{
"Effect": "Allow",
"Principal": {"AWS": ["arn:aws:iam::usfolks:user/fred:subuser"]},
"Action": "s3:PutObjectAcl",
"Resource": [
"arn:aws:s3:::happybucket/*"
]
}]
}
$ s3cmd setpolicy examplepol s3://happybucket
$ s3cmd delpolicy s3://happybucket
Limitations¶
Currently, we support only the following actions:
s3:AbortMultipartUpload
s3:CreateBucket
s3:DeleteBucketPolicy
s3:DeleteBucket
s3:DeleteBucketWebsite
s3:DeleteObject
s3:DeleteObjectVersion
s3:DeleteReplicationConfiguration
s3:GetAccelerateConfiguration
s3:GetBucketAcl
s3:GetBucketCORS
s3:GetBucketLocation
s3:GetBucketLogging
s3:GetBucketNotification
s3:GetBucketPolicy
s3:GetBucketRequestPayment
s3:GetBucketTagging
s3:GetBucketVersioning
s3:GetBucketWebsite
s3:GetLifecycleConfiguration
s3:GetObjectAcl
s3:GetObject
s3:GetObjectTorrent
s3:GetObjectVersionAcl
s3:GetObjectVersion
s3:GetObjectVersionTorrent
s3:GetReplicationConfiguration
s3:ListAllMyBuckets
s3:ListBucketMultiPartUploads
s3:ListBucket
s3:ListBucketVersions
s3:ListMultipartUploadParts
s3:PutAccelerateConfiguration
s3:PutBucketAcl
s3:PutBucketCORS
s3:PutBucketLogging
s3:PutBucketNotification
s3:PutBucketPolicy
s3:PutBucketRequestPayment
s3:PutBucketTagging
s3:PutBucketVersioning
s3:PutBucketWebsite
s3:PutLifecycleConfiguration
s3:PutObjectAcl
s3:PutObject
s3:PutObjectVersionAcl
s3:PutReplicationConfiguration
s3:RestoreObject
We do not yet support setting policies on users, groups, or roles.
We use the RGW ‘tenant’ identifier in place of the Amazon twelve-digit account ID. In the future we may allow you to assign an account ID to a tenant, but for now if you want to use policies between AWS S3 and RGW S3 you will have to use the Amazon account ID as the tenant ID when creating users.
Under AWS, all tenants share a single namespace. RGW gives every tenant its own namespace of buckets. There may be an option to enable an AWS-like ‘flat’ bucket namespace in future versions. At present, to access a bucket belonging to another tenant, address it as “tenant:bucket” in the S3 request.
In AWS, a bucket policy can grant access to another account, and that account owner can then grant access to individual users with user permissions. Since we do not yet support user, role, and group permissions, account owners will currently need to grant access directly to individual users, and granting an entire account access to a bucket grants access to all users in that account.
Bucket policies do not yet support string interpolation.
For all requests, condition keys we support are: - aws:CurrentTime - aws:EpochTime - aws:PrincipalType - aws:Referer - aws:SecureTransport - aws:SourceIp - aws:UserAgent - aws:username
We support certain s3 condition keys for bucket and object requests.
New in version Mimic.
Swift¶
There is no way to set bucket policies under Swift, but bucket policies that have been set govern Swift as well as S3 operations.
Swift credentials are matched against Principals specified in a policy in a way specific to whatever backend is being used.