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| <h1>Ozone ACLs</h1> |
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| <!--- |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You under the Apache License, Version 2.0 |
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| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| --> |
| <p>Ozone supports a set of native ACLs. These ACLs can be used independently |
| of ozone ACL plugin such as Ranger. If Apache Ranger plugin for Ozone is |
| enabled, then ACL will be checked with Ranger.</p> |
| <p>Ozone ACLs are a super set of Posix and S3 ACLs.</p> |
| <p>The general format of an ACL is <em>object</em>:<em>who</em>:<em>rights</em>.</p> |
| <p>Where an <em>object</em> can be:</p> |
| <ol> |
| <li><strong>Volume</strong> - An Ozone volume. e.g. <em>/volume</em></li> |
| <li><strong>Bucket</strong> - An Ozone bucket. e.g. <em>/volume/bucket</em></li> |
| <li><strong>Key</strong> - An object key or an object. e.g. <em>/volume/bucket/key</em></li> |
| <li><strong>Prefix</strong> - A path prefix for a specific key. e.g. <em>/volume/bucket/prefix1/prefix2</em></li> |
| </ol> |
| <p>Where a <em>who</em> can be:</p> |
| <ol> |
| <li><strong>User</strong> - A user in the Kerberos domain. User like in Posix world can be |
| named or unnamed.</li> |
| <li><strong>Group</strong> - A group in the Kerberos domain. Group also like in Posix world |
| can |
| be named or unnamed.</li> |
| <li><strong>World</strong> - All authenticated users in the Kerberos domain. This maps to |
| others in the Posix domain.</li> |
| <li><strong>Anonymous</strong> - Ignore the user field completely. This is an extension to |
| the Posix semantics, This is needed for S3 protocol, where we express that |
| we have no way of knowing who the user is or we don’t care.</li> |
| </ol> |
| <div class="alert alert-success" role="alert"> |
| A S3 user accessing Ozone via AWS v4 signature protocol will be translated |
| to the appropriate Kerberos user by Ozone Manager. |
| </div> |
| <p>Where a <em>right</em> can be:</p> |
| <ol> |
| <li><strong>Create</strong> – This ACL provides a user the ability to create buckets in a |
| volume and keys in a bucket. Please note: Under Ozone, Only admins can create volumes.</li> |
| <li><strong>List</strong> – This ACL allows listing of buckets and keys. This ACL is attached |
| to the volume and buckets which allow listing of the child objects. Please note: The user and admins can list the volumes owned by the user.</li> |
| <li><strong>Delete</strong> – Allows the user to delete a volume, bucket or key.</li> |
| <li><strong>Read</strong> – Allows the user to read the metadata of a Volume and Bucket and |
| data stream and metadata of a key.</li> |
| <li><strong>Write</strong> - Allows the user to write the metadata of a Volume and Bucket and |
| allows the user to overwrite an existing ozone key.</li> |
| <li><strong>Read_ACL</strong> – Allows a user to read the ACL on a specific object.</li> |
| <li><strong>Write_ACL</strong> – Allows a user to write the ACL on a specific object.</li> |
| </ol> |
| <h3>Ozone Native ACL APIs</h3> |
| <p>The ACLs can be manipulated by a set of APIs supported by Ozone. The APIs |
| supported are:</p> |
| <ol> |
| <li><strong>SetAcl</strong> – This API will take user principal, the name, type |
| of the ozone object and a list of ACLs.</li> |
| <li><strong>GetAcl</strong> – This API will take the name and type of the ozone object |
| and will return a list of ACLs.</li> |
| <li><strong>AddAcl</strong> - This API will take the name, type of the ozone object, the |
| ACL, and add it to existing ACL entries of the ozone object.</li> |
| <li><strong>RemoveAcl</strong> - This API will take the name, type of the |
| ozone object and the ACL that has to be removed.</li> |
| </ol> |
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