Configuring access permissions for a bucket using Identity and Access Management

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 relevant documentation on the Terraform website or its mirror.

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

To assign a role for a bucket using Terraform:

1. In the Terraform configuration file, describe the resources you want to create:

   resource "yandex_storage_bucket_iam_binding" "mybucket-viewers" {
     bucket  = "<bucket_name>"
     role    = "<role>"
     members = [
                 "<subject_type>:<subject_ID>",
                 "serviceAccount:<service_account_ID>",
                 "userAccount:<user_ID>"
               ]
   }
   
   # Example of assigning the `storage.editor` role to service accounts
   resource "yandex_storage_bucket_iam_binding" "sa-editors" {
     bucket  = "<bucket_name>"
     role    = "storage.editor"
     members = [
                 "serviceAccount:<service_account_1_ID>",
                 "serviceAccount:<service_account_2_ID>"
               ]
   }
   
   # Example of assigning the `storage.admin` role to users 
   resource "yandex_storage_bucket_iam_binding" "users-admins" {
     bucket  = "<bucket_name>"
     role    = "storage.admin"
     members = [
                 "userAccount:<user_1_ID>",
                 "userAccount:<user_2_ID>"
               ]
   }
   

   Where:

   • bucket: Bucket name.

   • role: Role.

     Warning

     You cannot use the yandex_storage_bucket_iam_binding resource to assign primitive roles, such as viewer, editor, or admin for a bucket if the yandex_storage_bucket_grant resource or the acl or grant parameters of the yandex_storage_bucket resource are used simultaneously.

   • members: Types and IDs of entities assigned the role. Specify it as userAccount:<user_ID> or serviceAccount:<service_account_ID>.

   For more information about yandex_storage_bucket_iam_binding resource properties, see this provider guide.

2. If you intend to use the yandex_storage_bucket_iam_binding resource together with yandex_storage_bucket_grant for the same bucket, we recommend creating them sequentially. To do this, add a dependency on the yandex_storage_bucket_grant resource to the yandex_storage_bucket_iam_binding section.

   resource "yandex_storage_bucket_iam_binding" "mybucket-viewers" {
     ...
   
     depends_on = [
       yandex_storage_bucket_grant.my_bucket_grant
     ]
   }
   

3. Apply the configuration:

   1. In the terminal, go to the directory where you edited the configuration file.

   2. Make sure the configuration file is correct using this command:

      terraform validate
      

      If the configuration is correct, you will get this message:

      Success! The configuration is valid.
      

   3. Run this command:

      terraform plan
      

      You will see a detailed list of resources. No changes will be made at this step. If the configuration contains any errors, Terraform will show them.

   4. Apply the changes:

      terraform apply
      

   5. Type yes and press Enter to confirm the changes.

   You can check the resource update using the management console.

Use the updateAccessBindings REST API method for the Bucket resource or the BucketService/UpdateAccessBindings gRPC API call.