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| <h1>S3 Multi-Tenancy</h1> |
| |
| <!--- |
| 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 |
| (the "License"); you may not use this file except in compliance with |
| the License. You may obtain a copy of the License at |
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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>Before Ozone multi-tenancy, all S3 access to Ozone (via <a href="../interface/s3.html">S3 Gateway</a>) are |
| confined to a <strong>single</strong> designated S3 volume (that is volume <code>s3v</code>, by default).</p> |
| <p>Ozone multi-tenancy allows <strong>multiple</strong> S3-accessible volumes to be created. |
| Each volume can be managed separately by their own tenant admins via CLI for user operations, and via Apache Ranger for access control.</p> |
| <p>The concept <strong>tenant</strong> is introduced to Ozone by multi-tenancy. |
| Each tenant has its own designated volume. |
| Each user assigned to a tenant will be able to access the associated volume with an <em>Access ID & Secret Key</em> pair |
| generated when an Ozone cluster admin or tenant admin assigns the user to the tenant using CLI.</p> |
| <blockquote> |
| <p>This multi-tenant feature allows Ozone resources to be compartmentalized in different isolation zones (tenants).</p> |
| </blockquote> |
| <blockquote> |
| <p>This multi-tenant support will also allow users to access Ozone volumes over AWS S3 APIs (without any modifications to the APIs).</p> |
| </blockquote> |
| <h2 id="basics">Basics</h2> |
| <ol> |
| <li>Initial tenant creation has to be done by an Ozone cluster admin under the CLI.</li> |
| <li>The Ozone cluster admin will have to assign the first user of a tenant. Once assigned, an <em>Access ID & Secret Key pair</em> (key pair) will be generated for that user for access via S3 Gateway. |
| <ul> |
| <li>The key pair serves to authenticate the end user to the Ozone Manager (via client requests from S3 Gateway). Tenant volume is selected based on the Access ID.</li> |
| <li>After successful authentication, Ozone Manager uses the underlying user name (not the Access ID) to identify the user. The user name is used to perform authorization checks in Apache Ranger.</li> |
| <li>A key pair is tied to the user name it is assigned to. If a user is assigned key pairs in multiple tenants, all key pairs point to the same user name internally in Ozone Manager.</li> |
| <li>A user can be only assigned one key pair in a same tenant. Ozone Manager rejects the tenant user assign request if a user is already assigned to the same tenant (i.e. when the user has already been assigned an Access ID in this tenant).</li> |
| <li>One user can be assigned to multiple tenants. The user will have a different key pair to access each tenant. For instance, <code>testuser</code> could use <code>tenantone$testuser</code> to access <code>tenantone</code> buckets, and use <code>tenanttwo$testuser</code> to access <code>tenanttwo</code> buckets via S3 Gateway. |
| <ul> |
| <li>A bucket link can be set up if cross-tenant (cross-volume) access is desired. See <strong>Creating bucket links</strong> section in <a href="../feature/s3-tenant-commands.html">Tenant commands</a>.</li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| <li>The Ozone cluster admin can then assign tenant admin roles to that user.</li> |
| <li>Tenant admin are able to assign new users to the tenant. |
| <ul> |
| <li>They can even assign new tenant admins in their tenant, if they are delegated tenant admins, which is the default. See <strong>Assign a user as a tenant admin</strong> section in <a href="../feature/s3-tenant-commands.html">Tenant commands</a>.</li> |
| <li>Note that tenant admins still need to use Ozone tenant CLI to assign new users to the tenant. |
| <ul> |
| <li>Once tenant admins get the Kerberos TGT (via <code>kinit</code>), they can run <code>user assign</code> command to assign new users. Ozone Manager will recognize that they are the tenant admins and allow the user to do so in their tenants.</li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| <li>After that, users can use any S3-compatible client (awscli, Python boto3 library, etc.) to access the buckets in the tenant volume via S3 Gateway using the generated key pairs.</li> |
| </ol> |
| <h2 id="access-control">Access Control</h2> |
| <p>Ozone multi-tenancy relies on <a href="../security/securitywithranger.html">Apache Ranger</a> to enforce access control to resources.</p> |
| <p>See <a href="../feature/s3-multi-tenancy-access-control.html">Access Control</a> for more information.</p> |
| <h2 id="setup">Setup</h2> |
| <p>See <a href="../feature/s3-multi-tenancy-setup.html">Multi-Tenancy Setup</a>.</p> |
| <h2 id="usage">Usage</h2> |
| <p>See <a href="../feature/s3-tenant-commands.html">Tenant Subcommands</a>.</p> |
| <h2 id="references">References</h2> |
| <ul> |
| <li>For developers: check out the upstream jira <a href="https://issues.apache.org/jira/browse/HDDS-4944">HDDS-4944</a> and the attached design docs.</li> |
| </ul> |
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