Permissions Management

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.

IAM is a free service. You only pay for the resources in your account. For more information about IAM, see section "Service Overview" in the Identity and Access Management User Guide.

OBS Permissions

By default, new IAM users do not have any permissions assigned. You can assign permissions to these users by adding them to one or more groups and attaching policies to the 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.

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.

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

Table 1 lists all system policies of OBS.

**Table 1** OBS system policies
Policy	Description	Policy Type
Tenant Administrator	Allows you to perform any operation on all cloud resources under the account. OBS policies are configured under Global service > OBS.	RBAC policy
Tenant Guest	Allows you to perform read-only operations on all cloud resources under the account. OBS policies are configured under Global service > OBS.	RBAC policy
OBS Buckets Viewer	Allows you to list buckets, and obtain basic bucket information and bucket metadata. OBS policies are configured under Global service > OBS.	RBAC 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
Listing buckets	Yes	Yes	Yes
Creating buckets	Yes	No	No
Deleting buckets	Yes	No	No
Obtaining basic bucket information	Yes	Yes	Yes
Controlling bucket access	Yes	No	No
Managing bucket policies	Yes	No	No
Modifying bucket storage classes	Yes	No	No
Listing objects	Yes	Yes	No
Listing objects with multiple versions	Yes	Yes	No
Uploading files	Yes	No	No
Creating folders	Yes	No	No
Deleting files	Yes	No	No
Deleting folders	Yes	No	No
Downloading files	Yes	Yes	No
Deleting files with multiple versions	Yes	No	No
Downloading files with multiple versions	Yes	Yes	No
Modifying object storage classes	Yes	No	No
Restoring files	Yes	No	No
Canceling the deletion of files	Yes	No	No
Deleting fragments	Yes	No	No
Controlling object access	Yes	No	No
Configuring object metadata	Yes	No	No
Obtaining object metadata	Yes	Yes	No
Managing versioning	Yes	No	No
Managing logging	Yes	No	No
Managing event notifications	Yes	No	No
Managing lifecycle rules	Yes	No	No
Managing static website hosting	Yes	No	No
Managing CORS rules	Yes	No	No
Managing URL validation	Yes	No	No
Managing domain names	Yes	No	No
Managing cross-region replication	Yes	No	No
Configuring object ACL	Yes	No	No
Configuring the ACL for an object of a specified version	Yes	No	No
Obtaining object ACL information	Yes	Yes	No
Obtaining the ACL information of a specified object version	Yes	Yes	No
Uploading in the multipart mode	Yes	No	No
Listing uploaded parts	Yes	Yes	No
Canceling multipart uploads	Yes	No	No