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Granting Other Accounts the Specified Permissions for Certain Objects

Updated on 2024-02-29 GMT+08:00

Scenario

This case describes how to grant other accounts the specified permissions for a specified object in an OBS bucket. The following describes how to grant the permission to download an object.

If you need to configure other permissions, select the corresponding actions from the Action Name drop-down list in the bucket policy. For details about the actions supported by OBS, see Action/NotAction.

For details about how to grant permissions to an IAM user, see Granting IAM Users Under an Account the Access to a Bucket and the Resources in It.

Recommended Configuration

You are advised to use bucket policies to grant permissions to other accounts.

Configuration Precautions

After the configuration is complete, you can download objects using APIs. However, if you log in to OBS Console or OBS Browser+ to download an object, an error is reported indicating that you do not have required permissions.

This is because when you log in to OBS Console or OBS Browser+, APIs (such as ListAllMyBuckets and ListBucket) are called to load the bucket list and object list and some other APIs will also be called on other pages, but your permissions do not cover those APIs. In such case, your access is denied or your operation is not allowed.

Procedure

  1. In the navigation pane of OBS Console, choose Object Storage.
  2. In the bucket list, click the bucket name you want to go to the Overview page.
  3. In the navigation pane, choose Permissions.
  4. On the Bucket Policies page, click Create Bucket Policy under Custom Bucket Policies.
  5. Configure parameters for a bucket policy.

    Table 1 Parameters for creating a bucket policy

    Parameter

    Description

    Policy Mode

    Select Customized.

    Effect

    Select Allow.

    Principal

    • Select Include > Other account.
    • Account ID: Enter the ID of the account which you want to grant permissions to. You can obtain it from the My Credentials page of the account.
    • User ID: Enter the account ID, which can be obtained from the My Credentials page of the account.
      NOTE:

      In this example, permissions are granted to an account, excluding any IAM user under the account. Therefore, the user ID is the same as the account ID.

    Resources

    • Choose Include > Specific resources.
    • Resource Name: Enter the object or the set of objects that will be accessed.

      For one object, enter object name.

      For a set of objects, enter object name prefix + *, * + object name suffix, or *.

    Actions

    • Include
    • Action Name: Select GetObject.

    To configure other permissions, select the corresponding actions. For details about the actions supported by OBS, see Action/NotAction.

  6. Click OK. The bucket policy is created.

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