Configuring VM access permissions

Written by

Yandex Cloud

Updated at May 5, 2025

Assigning a role
Assigning multiple roles
Revoking a role

To grant a user, group, or service account access to a VM, assign a role for it.

Assigning a role

Management console

CLI

Terraform

API

In the management console, select the folder the VM belongs to.
Select Compute Cloud.
Select the VM.
Go to the Access bindings tab.
Click Assign roles.
In the window that opens, select the group, user, or service account you want to grant access to the VM.
Click Add role and select the required roles.
Click Save.

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

The folder specified when creating the CLI profile is used by default. To change the default folder, use the yc config set folder-id <folder_ID> command. You can specify a different folder using the --folder-name or --folder-id parameter.

See the description of the CLI command for assigning a role for a VM:
```
yc compute instance add-access-binding --help
```

Get a list of VMs in the default folder:

yc compute instance list

Result:

+----------------------+-----------------+---------------+---------+----------------------+
|          ID          |       NAME      |    ZONE ID    | STATUS  |     DESCRIPTION      |
+----------------------+-----------------+---------------+---------+----------------------+
| fhm0b28lgfp4******** | first-instance  | ru-central1-a | RUNNING | my first vm via CLI  |
| fhm9gk85nj7g******** | second-instance | ru-central1-a | RUNNING | my second vm via CLI |
+----------------------+-----------------+---------------+---------+----------------------+

View a list of roles already assigned for the resource in question:
```
yc compute instance list-access-bindings <VM_ID>
```

Assign the role using this command:

To a user:

yc compute instance add-access-binding <VM_ID> \
  --user-account-id <user_ID> \
  --role <role>

Where:

--user-account-id: User ID.
--role: Role to assign.

To a service account:

yc compute instance add-access-binding <VM_ID> \
  --service-account-id <service_account_ID> \
  --role <role>

Where:

--service-account-id: Service account ID.
--role: Role to assign.

With Terraform, you can quickly create a cloud infrastructure in Yandex Cloud and manage it using configuration files. These files store the infrastructure description written in HashiCorp Configuration Language (HCL). If you change the configuration files, Terraform automatically detects which part of your configuration is already deployed, and what should be added or removed.

Terraform is distributed under the Business Source License. The Yandex Cloud provider for Terraform is distributed under the MPL-2.0 license.

For more information about the provider resources, see the documentation on the Terraform website or mirror website.

If you do not have Terraform yet, install it and configure its Yandex Cloud provider.

To assign a role for a VM using Terraform:

In the Terraform configuration file, define the parameters of the resources you want to create:
```
resource "yandex_compute_instance_iam_binding" "sa-access" {
  instance_id = "<VM_ID>"
  role        = "<role>"
  members     = ["<subject_type>:<subject_ID>","<subject_type>:<subject_ID>"]
}
```
Where:
- instance_id: VM ID.
- role: Role to assign.
- members: List of types and IDs of subjects getting the role. Specify it as userAccount:<user_ID> or serviceAccount:<service_account_ID>.
For more information about the yandex_compute_instance_iam_binding resource parameters, see the relevant provider documentation.
Create the resources:
1. In the terminal, change to the folder where you edited the configuration file.
2. Make sure the configuration file is correct using the command:
```
terraform validate
```
  If the configuration is correct, the following message is returned:
```
Success! The configuration is valid.
```
3. Run the command:
```
terraform plan
```
  The terminal will display a list of resources with parameters. No changes are made at this step. If the configuration contains errors, Terraform will point them out.
4. Apply the configuration changes:
```
terraform apply
```
5. Confirm the changes: type yes in the terminal and press Enter.
Terraform will create all the required resources. You can check the new resources using the management console or this CLI command:
```
yc compute instance list-access-bindings <VM_ID>
```

Use the updateAccessBindings REST API method for the Instance resource or the InstanceService/UpdateAccessBindings gRPC API call. In the request body, set the action property to ADD and specify the user type and ID under subject.

Assigning multiple roles

Management console

CLI

Terraform

API

In the management console, select the folder the VM belongs to.
Select Compute Cloud.
Select the VM.
Go to the Access bindings tab.
Click Assign roles.
In the window that opens, select the group, user, or service account you want to grant access to the VM.
Click Add role and select the required roles.
To add another role, click Add role.
Click Save.

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

You can assign multiple roles using the set-access-bindings command.

Alert

The set-access-bindings command completely rewrites access permissions for the resource. All current roles for the resource will be deleted.

Make sure the resource has no roles assigned that you would not want to lose:
```
yc compute instance list-access-bindings <VM_ID>
```
See the CLI command description for assigning roles for a VM:
```
yc compute instance set-access-bindings --help
```

Assign roles:

yc compute instance set-access-bindings <VM_ID> \
  --access-binding role=<role>,subject=<subject_type>:<subject_ID>

Where:

--access-binding: Role to assign:
- role: ID of the role to assign.
- subject: Type and ID of the subject getting the role.

For example, this command will assign roles to multiple users and a single service account:

yc compute instance set-access-bindings test-vm \
  --access-binding role=editor,subject=userAccount:gfei8n54hmfh********
  --access-binding role=viewer,subject=userAccount:helj89sfj80a********
  --access-binding role=editor,subject=serviceAccount:ajel6l0jcb9s********

If you do not have Terraform yet, install it and configure its Yandex Cloud provider.

To assign multiple roles for a VM using Terraform:

In the Terraform configuration file, define the parameters of the resources you want to create:
```
resource "yandex_compute_instance_iam_binding" "role-1" {
  instance_id = "<VM_ID>"
  role        = "<role_1>"
  members     = ["<subject_type>:<subject_ID>"]
}

resource "yandex_compute_instance_iam_binding" "role-2" {
  instance_id = "<VM_ID>"
  role        = "<role_2>"
  members     = ["<subject_type>:<subject_ID>"]
}
```
Where:
- instance_id: VM ID.
- role: Role to assign.
- members: List of types and IDs of subjects getting the role. Specify it as userAccount:<user_ID> or serviceAccount:<service_account_ID>.
For more information about the yandex_compute_instance_iam_binding resource parameters, see the relevant provider documentation.
Create the resources:
1. In the terminal, change to the folder where you edited the configuration file.
2. Make sure the configuration file is correct using the command:
```
terraform validate
```
  If the configuration is correct, the following message is returned:
```
Success! The configuration is valid.
```
3. Run the command:
```
terraform plan
```
  The terminal will display a list of resources with parameters. No changes are made at this step. If the configuration contains errors, Terraform will point them out.
4. Apply the configuration changes:
```
terraform apply
```
5. Confirm the changes: type yes in the terminal and press Enter.
You can check the updates using the management console or this CLI command:
```
yc compute instance list-access-bindings <VM_ID>
```

Use the setAccessBindings REST API method for the Instance resource or the InstanceService/SetAccessBindings gRPC API call.

Revoking a role

Management console

CLI

Terraform

API

In the management console, select the folder the VM belongs to.
Select Compute Cloud.
Select the VM.
Go to the Access bindings tab.
In the line with the user in question, click and select Edit roles.
Click next to a role to delete it.
Click Save.

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

See the description of the CLI command for revoking a role for a VM:
```
yc compute instance remove-access-binding --help
```

View the roles and assignees for the resource:

yc compute instance list-access-bindings <VM_ID>

To revoke access permissions, run this command:

yc compute instance remove-access-binding <VM_ID> \
  --role <role_ID> \
  --subject <subject_type>:<subject_ID>

Where:

--role: ID of the role to revoke.
--subject: Subject to revoke the role from.

For example, this command revokes the viewer role for the VM from a user with the ajel6l0jcb9s******** ID:

yc compute instance remove-access-binding test-vm \
  --role viewer \
  --subject userAccount:ajel6l0jcb9s********

If you do not have Terraform yet, install it and configure its Yandex Cloud provider.

To revoke a role assigned for a VM using Terraform:

Open the Terraform configuration file and delete the section specifying the role:

resource "yandex_compute_instance_iam_binding" "sa-access" {
  instance_id = "<VM_ID>"
  role        = "<role>"
  members     = ["<subject_type>:<subject_ID>"]
}

Apply the changes:
1. In the terminal, change to the folder where you edited the configuration file.
2. Make sure the configuration file is correct using the command:
```
terraform validate
```
  If the configuration is correct, the following message is returned:
```
Success! The configuration is valid.
```
3. Run the command:
```
terraform plan
```
  The terminal will display a list of resources with parameters. No changes are made at this step. If the configuration contains errors, Terraform will point them out.
4. Apply the configuration changes:
```
terraform apply
```
5. Confirm the changes: type yes in the terminal and press Enter.
You can check the updates using the management console or this CLI command:
```
yc compute instance list-access-bindings <VM_ID>
```

To revoke roles for a VM, use the updateAccessBindings REST API method for the Instance resource or the InstanceService/UpdateAccessBindings gRPC API call. In the request body, set the action property to REMOVE and specify the user type and ID under subject.

Configuring VM access permissions

Assigning a roleAssigning a role

Assigning multiple rolesAssigning multiple roles

Revoking a roleRevoking a role

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Assigning a role

Assigning multiple roles

Revoking a role