Help Center/ Dedicated Distributed Storage Service/ User Guide/ Using IAM to Grant Access to DSS/ Using IAM Identity Policies to Grant Access to DSS
Updated on 2026-05-20 GMT+08:00
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Using IAM Identity Policies to Grant Access to DSS

System-defined permissions in identity policy-based authorization provided by Identity and Access Management (IAM) let you control access to DSS resources. With IAM, you can:

  • Create IAM users or user groups for personnel based on your enterprise's organizational structure. Each IAM user has their own identity credentials for accessing DSS resources.
  • Grant users only the permissions required to perform a given task based on their job responsibilities.
  • Entrust a HUAWEI ID or a cloud service to perform efficient O&M on your DSS resources.

If your Huawei Cloud account meets your permissions requirements, you can skip this section.

Figure 1 shows the process flow of identity policy-based authorization.

Prerequisites

Before granting permissions, learn about system-defined permissions in Permissions Management. To grant permissions for other services, learn about all system-defined permissions supported by IAM.

Process Flow

Figure 1 Process of granting DSS permissions using identity policy-based authorization

  1. On the IAM console, create an IAM user or create a user group.

  2. Attach a system-defined identity policy to the user or user group.

    Assign the permissions defined in the system-defined identity policy DSSReadOnlyPolicy to the user or group, or attach the system-defined identity policy to it.

  3. Log in as the IAM user and verify permissions.

    In the authorized region, perform the following operations:

    • Choose Service List > DSS. Then click Apply for Storage Pool on the DSS console. If a message appears indicating that you have insufficient permissions to perform the operation, the DSSReadOnlyPolicy policy is in effect.
    • Choose another service from Service List. If a message appears indicating that you have insufficient permissions to access the service, the DSSReadOnlyPolicy policy is in effect.

Example Custom Identity Policies

You can create custom identity policies to supplement system-defined identity policies of DSS. For details about actions supported in custom identity policies, see Permissions and Supported Actions.

To create a custom identity policy, choose either visual editor or JSON.

  • Visual editor: Select cloud services, actions, resources, and request conditions. This does not require knowledge of policy grammar.
  • JSON: Create a JSON policy or edit an existing one.

For details, see Creating a Custom Identity Policy and Attaching It to a Principal.

The following lists examples of common DSS custom identity policies.

  • Example 1: Grant users full DSS permissions. 
    {
      "Version":"5.0",
      "Statement":[
          {
             "Effect":"Allow"
             "Action":[
                  "dss:*:*"                         
            ]                         
         }
     ]
}

  • Example 2: Grant users read-only DSS permissions.

    A custom identity policy can contain the actions of one or multiple services. Example identity policy containing multiple actions:

    {
    "Version": "5.0",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                 "dss:*:get",
                 "dss:*:list",
            ]
        }      
    ]
}