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217 lines
9.6 KiB
ReStructuredText
217 lines
9.6 KiB
ReStructuredText
===============
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Bucket Policies
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===============
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.. versionadded:: Luminous
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The Ceph Object Gateway supports a subset of the Amazon S3 policy
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language applied to buckets.
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Creation and Removal
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====================
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Bucket policies are managed through standard S3 operations rather than
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radosgw-admin.
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For example, one may use s3cmd to set or delete a policy thus::
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$ cat > examplepol
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{
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"Version": "2012-10-17",
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"Statement": [{
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"Effect": "Allow",
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"Principal": {"AWS": ["arn:aws:iam::usfolks:user/fred:subuser"]},
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"Action": "s3:PutObjectAcl",
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"Resource": [
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"arn:aws:s3:::happybucket/*"
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]
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}]
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}
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$ s3cmd setpolicy examplepol s3://happybucket
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$ s3cmd delpolicy s3://happybucket
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Limitations
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===========
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Currently, we support only the following actions:
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- s3:AbortMultipartUpload
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- s3:CreateBucket
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- s3:DeleteBucketPolicy
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- s3:DeleteBucket
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- s3:DeleteBucketWebsite
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- s3:DeleteObject
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- s3:DeleteObjectVersion
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- s3:DeleteReplicationConfiguration
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- s3:GetAccelerateConfiguration
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- s3:GetBucketAcl
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- s3:GetBucketCORS
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- s3:GetBucketLocation
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- s3:GetBucketLogging
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- s3:GetBucketNotification
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- s3:GetBucketPolicy
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- s3:GetBucketRequestPayment
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- s3:GetBucketTagging
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- s3:GetBucketVersioning
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- s3:GetBucketWebsite
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- s3:GetLifecycleConfiguration
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- s3:GetObjectAcl
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- s3:GetObject
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- s3:GetObjectTorrent
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- s3:GetObjectVersionAcl
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- s3:GetObjectVersion
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- s3:GetObjectVersionTorrent
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- s3:GetReplicationConfiguration
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- s3:IPAddress
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- s3:NotIpAddress
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- s3:ListAllMyBuckets
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- s3:ListBucketMultipartUploads
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- s3:ListBucket
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- s3:ListBucketVersions
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- s3:ListMultipartUploadParts
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- s3:PutAccelerateConfiguration
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- s3:PutBucketAcl
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- s3:PutBucketCORS
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- s3:PutBucketLogging
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- s3:PutBucketNotification
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- s3:PutBucketPolicy
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- s3:PutBucketRequestPayment
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- s3:PutBucketTagging
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- s3:PutBucketVersioning
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- s3:PutBucketWebsite
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- s3:PutLifecycleConfiguration
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- s3:PutObjectAcl
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- s3:PutObject
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- s3:PutObjectVersionAcl
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- s3:PutReplicationConfiguration
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- s3:RestoreObject
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We do not yet support setting policies on users, groups, or roles.
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We use the RGW ‘tenant’ identifier in place of the Amazon twelve-digit
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account ID. In the future we may allow you to assign an account ID to
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a tenant, but for now if you want to use policies between AWS S3 and
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RGW S3 you will have to use the Amazon account ID as the tenant ID when
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creating users.
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Under AWS, all tenants share a single namespace. RGW gives every
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tenant its own namespace of buckets. There may be an option to enable
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an AWS-like 'flat' bucket namespace in future versions. At present, to
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access a bucket belonging to another tenant, address it as
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"tenant:bucket" in the S3 request.
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In AWS, a bucket policy can grant access to another account, and that
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account owner can then grant access to individual users with user
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permissions. Since we do not yet support user, role, and group
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permissions, account owners will currently need to grant access
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directly to individual users, and granting an entire account access to
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a bucket grants access to all users in that account.
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Bucket policies do not yet support string interpolation.
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For all requests, condition keys we support are:
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- aws:CurrentTime
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- aws:EpochTime
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- aws:PrincipalType
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- aws:Referer
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- aws:SecureTransport
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- aws:SourceIp
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- aws:UserAgent
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- aws:username
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We support certain s3 condition keys for bucket and object requests.
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.. versionadded:: Mimic
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Bucket Related Operations
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~~~~~~~~~~~~~~~~~~~~~~~~~~
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+-----------------------+----------------------+----------------+
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| Permission | Condition Keys | Comments |
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+-----------------------+----------------------+----------------+
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| | s3:x-amz-acl | |
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| | s3:x-amz-grant-<perm>| |
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|s3:createBucket | where perm is one of | |
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| | read/write/read-acp | |
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| | write-acp/ | |
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| | full-control | |
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+-----------------------+----------------------+----------------+
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| | s3:prefix | |
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| +----------------------+----------------+
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| s3:ListBucket & | s3:delimiter | |
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| +----------------------+----------------+
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| s3:ListBucketVersions | s3:max-keys | |
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+-----------------------+----------------------+----------------+
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| s3:PutBucketAcl | s3:x-amz-acl | |
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| | s3:x-amz-grant-<perm>| |
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+-----------------------+----------------------+----------------+
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.. _tag_policy:
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Object Related Operations
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~~~~~~~~~~~~~~~~~~~~~~~~~~
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+-----------------------------+-----------------------------------------------+-------------------+
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|Permission |Condition Keys | Comments |
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| | | |
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+-----------------------------+-----------------------------------------------+-------------------+
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| |s3:x-amz-acl & s3:x-amz-grant-<perm> | |
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| | | |
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| +-----------------------------------------------+-------------------+
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| |s3:x-amz-copy-source | |
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| | | |
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| +-----------------------------------------------+-------------------+
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| |s3:x-amz-server-side-encryption | |
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| | | |
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| +-----------------------------------------------+-------------------+
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|s3:PutObject |s3:x-amz-server-side-encryption-aws-kms-key-id | |
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| | | |
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| +-----------------------------------------------+-------------------+
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| |s3:x-amz-metadata-directive |PUT & COPY to |
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| | |overwrite/preserve |
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| | |metadata in COPY |
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| | |requests |
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| +-----------------------------------------------+-------------------+
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| |s3:RequestObjectTag/<tag-key> | |
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| | | |
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+-----------------------------+-----------------------------------------------+-------------------+
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|s3:PutObjectAcl |s3:x-amz-acl & s3-amz-grant-<perm> | |
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|s3:PutObjectVersionAcl | | |
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| +-----------------------------------------------+-------------------+
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| |s3:ExistingObjectTag/<tag-key> | |
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+-----------------------------+-----------------------------------------------+-------------------+
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| |s3:RequestObjectTag/<tag-key> | |
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|s3:PutObjectTagging & +-----------------------------------------------+-------------------+
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|s3:PutObjectVersionTagging |s3:ExistingObjectTag/<tag-key> | |
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| | | |
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+-----------------------------+-----------------------------------------------+-------------------+
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|s3:GetObject & |s3:ExistingObjectTag/<tag-key> | |
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|s3:GetObjectVersion | | |
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+-----------------------------+-----------------------------------------------+-------------------+
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|s3:GetObjectAcl & |s3:ExistingObjectTag/<tag-key> | |
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|s3:GetObjectVersionAcl | | |
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+-----------------------------+-----------------------------------------------+-------------------+
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|s3:GetObjectTagging & |s3:ExistingObjectTag/<tag-key> | |
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|s3:GetObjectVersionTagging | | |
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+-----------------------------+-----------------------------------------------+-------------------+
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|s3:DeleteObjectTagging & |s3:ExistingObjectTag/<tag-key> | |
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|s3:DeleteObjectVersionTagging| | |
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+-----------------------------+-----------------------------------------------+-------------------+
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More may be supported soon as we integrate with the recently rewritten
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Authentication/Authorization subsystem.
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Swift
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=====
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There is no way to set bucket policies under Swift, but bucket
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policies that have been set govern Swift as well as S3 operations.
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Swift credentials are matched against Principals specified in a policy
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in a way specific to whatever backend is being used.
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