:Configure RAM authorization for data migration from a user-created database in a VPC across different Alibaba Cloud accounts

Step 1: Create a RAM role and grant the default permission on DTS to the RAM role

1. Log on to the RAM console by using the Alibaba Cloud account to which the Express Connect circuit belongs.
2. In the left-side navigation pane, click RAM Roles.
3. Click Create RAM Role, select Alibaba Cloud Account, and then click Next.
4. In the Create RAM Role pane, configure parameters for the RAM role.
   

   Parameter	Description
   RAM Role Name	Specify a name for the RAM role. In this example, enter ram-for-dts. Note The name must be 1 to 64 characters in length and can contain letters, digits, and hyphens (-).
   Note	Optional. Specify the description for the RAM role.
   Select Trusted Alibaba Cloud Account	Select Other Alibaba Cloud Account and enter the ID of the Alibaba Cloud account to which the destination instance belongs. Note To obtain the ID of the Alibaba Cloud account to which the destination instance belongs, you must log on to the Account Management console by using this account. The account ID is displayed on the Security Settings page.

5. Click OK.
6. Click Input and Attach.
7. In the Add Permissions pane, select System Policy and enter AliyunDTSRolePolicy.
   
8. Click OK.
9. Click Close.

Step 2: Authorize the RAM role to access the VPC under another Alibaba Cloud account

1. Log on to the RAM console by using the Alibaba Cloud account to which the Express Connect circuit belongs.
2. In the left-side navigation pane, click RAM Roles.
3. Find the RAM role created in step 1, and click the role name.
   
4. On the Basic Information page of the RAM role, click Add Permissions.
5. In the Add Permissions pane, enter AliyunVPCReadOnlyAccess in the search box and click the policy name to move the policy to the Selected section.
   
6. Click OK.
7. On the Basic Information page of the RAM role, click the Trust Policy Management tab.
8. Click Edit Trust Policy, and replace the policy text with the following sample statements.
   

   {
       "Statement": [
           {
               "Action": "sts:AssumeRole",
               "Effect": "Allow",
               "Principal": {
                   "RAM": [
                       "acs:ram::<ID of the Alibaba Cloud account to which the destination instance belongs>:root"
                   ],
                   "Service": [
                       "<ID of the Alibaba Cloud account to which the destination instance belongs>@dts.aliyuncs.com"
                   ]
               }
           }
       ],
       "Version": "1"
   }

   Note To obtain the ID of the Alibaba Cloud account to which the destination instance belongs, you must log on to the Account Management console by using this account. The account ID is displayed on the Security Settings page. Then, you must replace the <ID of the Alibaba Cloud account to which the destination instance belongs> in the preceding statements with the account ID.

   

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