Using impersonation

If you do not have the Yandex Cloud CLI yet, install and initialize it.

1. Find out the ID of the service account you want to assign the role to. To find out the ID, get a list of available service accounts (in the administrator's profile):

   yc iam service-account list
   

   Result:

   +----------------------+----------+--------+---------------------+-----------------------+
   |          ID          |   NAME   | LABELS |     CREATED AT      | LAST AUTHENTICATED AT |
   +----------------------+----------+--------+---------------------+-----------------------+
   | ajebqtreob2d******** | test-sa  |        | 2024-09-08 18:59:45 | 2025-09-04 07:10:00   |
   | aje6o61dvog2******** | my-robot |        | 2023-06-27 16:18:18 | 2025-10-10 18:00:00   |
   +----------------------+----------+--------+---------------------+-----------------------+
   

2. Assign the test-sa service account the viewer role for my-folder. Put serviceAccount for subject type, and the service account's ID for value (in the administrator's profile):

   yc resource-manager folder add-access-binding my-folder \
     --role viewer \
     --subject serviceAccount:<service_account_ID>
   

3. Get the user's ID and assign the iam.serviceAccounts.tokenCreator role for the test-sa service account (in the administrator's profile):

   yc iam service-account add-access-binding test-sa \
     --role iam.serviceAccounts.tokenCreator \
     --subject userAccount:<user_ID>
   

4. The user can run a command under the test-sa service account using the --impersonate-service-account-id parameter.

   For example, the user can get a list of VMs in my-folder:

   yc compute instance list \
     --folder-name my-folder \
     --impersonate-service-account-id <service_account_ID>
   

   The user can also get an IAM token of the test-sa service account for short-term access:

   yc iam create-token \
     --impersonate-service-account-id <service_account_ID>
   

   The token will expire automatically.

5. If the user no longer needs this permission, revoke the role from the service account (in the administrator's profile):

   yc resource-manager folder remove-access-binding my-folder \
     --role viewer \
     --subject serviceAccount:<service_account_ID>
   

6. Revoke the iam.serviceAccounts.tokenCreator role from the user you granted service account permissions to:

   yc iam service-account remove-access-binding test-sa \
     --role iam.serviceAccounts.tokenCreator \
     --subject userAccount:<user_ID>