Permissions Management

Updated on 2022-05-17 GMT+08:00

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You can use Identity and Access Management (IAM) to manage OBS permissions and control access to your resources. IAM provides identity authentication, permissions management, and access control.

You can create IAM users for your employees, and assign permissions to these users on a principle of least privilege (PoLP) basis to control their access to specific resource types. For example, you can create IAM users for software developers and assign specific permissions to allow them to use OBS resources but prevent them from being able to delete resources or perform any high-risk operations.

If your account does not require individual IAM users for permissions management, skip this section.

OBS Permissions

By default, new IAM users do not have any permissions assigned. To assign permissions to these new users, add them to one or more groups, and attach permissions policies to these groups. IAM provides preset system policies that define common permissions for different services, such as full control access and read-only. You can directly use these preset policies.

OBS is a global service deployed and accessed without specifying any physical region. OBS permissions are assigned to users in the global project, and users do not need to switch regions when accessing OBS.

Policy Types

RBAC policy: An RBAC policy consists of permissions for an entire service. Users in a group with such a policy assigned are granted all the required permissions, including permissions for accessing and managing that service. RBAC policies do not support operation-specific permission control.
Fine-grained policy: A fine-grained policy consists of API-based permissions for operations on specific resource types. Fine-grained policies, as the name suggests, allow for more fine-grained control than RBAC policies. Users with such fine-grained permissions can only perform specific operations on services.

NOTE:

Due to data caching, an RBAC policy and fine-grained policy involving OBS actions will take effect 10 to 15 minutes after it is attached to a user, an enterprise project, and user group.

Table 1 lists all system policies of OBS.

**Table 1** OBS system policies
Policy	Description	Policy Type
Tenant Administrator	Operation permissions: any operation on all cloud resources owned by the account OBS policies are configured under Global service > OBS.	RBAC policy
Tenant Guest	Operation permissions: read-only access permission to all cloud resources owned by the account OBS policies are configured under Global service > OBS.	RBAC policy
OBS Buckets Viewer	Operation permissions: listing buckets, obtaining basic bucket information, obtaining bucket metadata information, and listing objects OBS policies are configured under Global service > OBS.	RBAC policy
OBS Viewer	Operation permissions: listing buckets, obtaining basic bucket information, obtaining bucket metadata information, and listing objects This policy is a system-defined policy of fine-grained authorization. Users with fine-grained authorization can use this policy and can create custom policy template based on this policy. OBS policies are configured under Global service > OBS.	Fine-grained policy
OBS Operator	Operation permissions: Users with this permission can perform all OBS Viewer operations and perform basic object operations, such as uploading objects, downloading objects, deleting objects, and obtaining object ACLs. This policy is a system-defined policy of fine-grained authorization. Users with fine-grained authorization can use this policy and can create custom policy template based on this policy. OBS policies are configured under Global service > OBS.	Fine-grained policy

The following table lists operations that can be performed under each set of OBS permission.

**Table 2** Permissions and the allowed operations on OBS resources
Operation	Tenant Administrator	Tenant Guest	OBS Buckets Viewer	OBS Viewer	OBS Operator
Listing buckets	Yes	Yes	Yes	Yes	Yes
Creating buckets	Yes	No	No	No	No
Deleting buckets	Yes	No	No	No	No
Obtaining basic bucket information	Yes	Yes	Yes	Yes	Yes
Controlling bucket access	Yes	No	No	No	No
Managing bucket policies	Yes	No	No	No	No
Modifying bucket storage classes	Yes	No	No	No	No
Listing objects	Yes	Yes	Yes	Yes	Yes
Listing objects with multiple versions	Yes	Yes	No	No	No
Uploading files	Yes	No	No	No	Yes
Creating folders	Yes	No	No	No	Yes
Deleting files	Yes	No	No	No	Yes
Deleting folders	Yes	No	No	No	Yes
Downloading files	Yes	Yes	No	No	Yes
Deleting files with multiple versions	Yes	No	No	No	Yes
Downloading files with multiple versions	Yes	Yes	No	No	Yes
Modifying object storage classes	Yes	No	No	No	No
Restoring files	Yes	No	No	No	No
Canceling the deletion of files	Yes	No	No	No	Yes
Deleting fragments	Yes	No	No	No	Yes
Controlling object access	Yes	No	No	No	No
Configuring object metadata	Yes	No	No	No	No
Obtaining object metadata	Yes	Yes	No	No	Yes
Managing versioning	Yes	No	No	No	No
Managing logging	Yes	No	No	No	No
Managing event notifications	Yes	No	No	No	No
Managing tags	Yes	No	No	No	No
Managing lifecycle rules	Yes	No	No	No	No
Managing static website hosting	Yes	No	No	No	No
Managing CORS rules	Yes	No	No	No	No
Managing URL validation	Yes	No	No	No	No
Managing domain names	Yes	No	No	No	No
Appending objects	Yes	No	No	No	Yes
Configuring object ACL	Yes	No	No	No	No
Configuring the ACL for an object of a specified version	Yes	No	No	No	No
Obtaining object ACL information	Yes	Yes	No	No	Yes
Obtaining the ACL information of a specified object version	Yes	Yes	No	No	Yes
Uploading in the multipart mode	Yes	No	No	No	Yes
Listing uploaded parts	Yes	Yes	No	No	Yes
Canceling multipart tasks	Yes	No	No	No	Yes

Managing OBS Resource Permissions

Access to OBS buckets and objects can be controlled by IAM user permissions, bucket policies, and ACLs.

For more information, see Overview.

Parent topic: Service Overview

Previous topic: Application Scenarios

Next topic: Using OBS

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