azurerm_container_group - Supports CMK with user assigned identity

internal/services/containers/container_group_resource.go

@@ -553,6 +553,12 @@ func resourceContainerGroup() *pluginsdk.Resource {
 				ForceNew:     true,
 				ValidateFunc: keyVaultValidate.NestedItemId,
 			},
+
+			"key_vault_user_assigned_identity_id": {
+				Type:         pluginsdk.TypeString,
+				Optional:     true,
+				ValidateFunc: commonids.ValidateUserAssignedIdentityID,
+			},
 		},
 	}
 }
@@ -777,6 +783,10 @@ func resourceContainerGroupCreate(d *pluginsdk.ResourceData, meta interface{}) e
 			KeyName:      keyId.Name,
 			KeyVersion:   keyId.Version,
 		}
+
+		if keyVaultUAI := d.Get("key_vault_user_assigned_identity_id").(string); keyVaultUAI != "" {
+			containerGroup.Properties.EncryptionProperties.Identity = &keyVaultUAI
+		}
 	}
 
 	// Avoid parallel provisioning if "subnet_ids" are given.
@@ -942,6 +952,7 @@ func resourceContainerGroupRead(d *pluginsdk.ResourceData, meta interface{}) err
 				return err
 			}
 			d.Set("key_vault_key_id", keyId.ID())
+			d.Set("key_vault_user_assigned_identity_id", pointer.From(kvProps.Identity))
 		}
 	}
 

internal/services/containers/container_group_resource_test.go

@@ -695,6 +695,21 @@ func TestAccContainerGroup_encryption(t *testing.T) {
 	})
 }
 
+func TestAccContainerGroup_encryptionWithUserAssignedIdentity(t *testing.T) {
+	data := acceptance.BuildTestData(t, "azurerm_container_group", "test")
+	r := ContainerGroupResource{}
+
+	data.ResourceTest(t, r, []acceptance.TestStep{
+		{
+			Config: r.encryptionWithUserAssignedIdentity(data),
+			Check: acceptance.ComposeTestCheckFunc(
+				check.That(data.ResourceName).ExistsInAzure(r),
+			),
+		},
+		data.ImportStep(),
+	})
+}
+
 func TestAccContainerGroup_securityContext(t *testing.T) {
 	data := acceptance.BuildTestData(t, "azurerm_container_group", "test")
 	r := ContainerGroupResource{}
@@ -2489,6 +2504,112 @@ resource "azurerm_container_group" "test" {
 `, data.RandomInteger, data.Locations.Primary, data.RandomInteger)
 }
 
+func (ContainerGroupResource) encryptionWithUserAssignedIdentity(data acceptance.TestData) string {
+	return fmt.Sprintf(`
+provider "azurerm" {
+  features {}
+}
+
+resource "azurerm_resource_group" "test" {
+  name     = "acctestRG-%[1]d"
+  location = "%[2]s"
+}
+
+data "azurerm_client_config" "current" {}
+
+resource "azurerm_key_vault" "test" {
+  name                = "acc-%[1]d"
+  location            = azurerm_resource_group.test.location
+  resource_group_name = azurerm_resource_group.test.name
+  tenant_id           = data.azurerm_client_config.current.tenant_id
+  sku_name            = "standard"
+}
+
+resource "azurerm_key_vault_access_policy" "terraform" {
+  key_vault_id = azurerm_key_vault.test.id
+  key_permissions = [
+    "Create",
+    "Delete",
+    "Get",
+    "List",
+    "Purge",
+    "Update",
+    "GetRotationPolicy",
+  ]
+
+  secret_permissions = [
+    "Get",
+    "Delete",
+    "Set",
+  ]
+  tenant_id = data.azurerm_client_config.current.tenant_id
+  object_id = data.azurerm_client_config.current.object_id
+}
+
+resource "azurerm_key_vault_key" "test" {
+  name         = "key-%[1]d"
+  key_vault_id = azurerm_key_vault.test.id
+  key_type     = "RSA"
+  key_size     = 2048
+
+  key_opts = [
+    "decrypt",
+    "encrypt",
+    "sign",
+    "unwrapKey",
+    "verify",
+    "wrapKey",
+  ]
+  depends_on = [azurerm_key_vault_access_policy.terraform]
+}
+
+resource "azurerm_user_assigned_identity" "test" {
+  location            = azurerm_resource_group.test.location
+  resource_group_name = azurerm_resource_group.test.name
+  name                = "uai-%[1]d"
+}
+
+resource "azurerm_key_vault_access_policy" "test" {
+  key_vault_id = azurerm_key_vault.test.id
+  key_permissions = [
+    "Get",
+    "UnwrapKey",
+    "WrapKey",
+    "GetRotationPolicy",
+  ]
+  tenant_id  = azurerm_user_assigned_identity.test.tenant_id
+  object_id  = azurerm_user_assigned_identity.test.principal_id
+  depends_on = [azurerm_key_vault_access_policy.terraform]
+}
+
+resource "azurerm_container_group" "test" {
+  name                = "acctestcontainergroup-%[1]d"
+  location            = azurerm_resource_group.test.location
+  resource_group_name = azurerm_resource_group.test.name
+  ip_address_type     = "Public"
+  os_type             = "Linux"
+
+  container {
+    name   = "hw"
+    image  = "ubuntu:20.04"
+    cpu    = "0.5"
+    memory = "0.5"
+    ports {
+      port     = 80
+      protocol = "TCP"
+    }
+  }
+  key_vault_key_id                    = azurerm_key_vault_key.test.id
+  key_vault_user_assigned_identity_id = azurerm_user_assigned_identity.test.id
+  identity {
+    type         = "UserAssigned"
+    identity_ids = [azurerm_user_assigned_identity.test.id]
+  }
+  depends_on = [azurerm_key_vault_access_policy.test]
+}
+`, data.RandomInteger, data.Locations.Primary, data.RandomInteger)
+}
+
 func (ContainerGroupResource) securityContextPriviledged(data acceptance.TestData, v bool) string {
 	return fmt.Sprintf(`
 provider "azurerm" {

website/docs/r/container_group.html.markdown

@@ -99,6 +99,8 @@ The following arguments are supported:
 
 * `key_vault_key_id` - (Optional) The Key Vault key URI for CMK encryption. Changing this forces a new resource to be created.
 
+* `key_vault_user_assigned_identity_id` - (Optional) The user assigned identity that has access to the Key Vault Key. If not specified, the RP principal named "Azure Container Instance Service" will be used instead. Make sure the identity has the proper `key_permissions` set, at least with `Get`, `UnwrapKey`, `WrapKey` and `GetRotationPolicy`.
+
 * `subnet_ids` - (Optional) The subnet resource IDs for a container group. Changing this forces a new resource to be created.
 
 * `image_registry_credential` - (Optional) An `image_registry_credential` block as documented below. Changing this forces a new resource to be created.