Adding terraform to create resources for csi driver secrets

Signed-off-by: ritikaguptams <[email protected]>

Author: ritikaguptams

infra/azure/terraform/secrets-store-csi-driver/README.md

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+# Getting started with secrets-store-csi-driver resource management
+The terraform scripts here help create: 
+- a resource group
+- a key vault 
+- a secret in the key vault

infra/azure/terraform/secrets-store-csi-driver/main.tf

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+/*
+Copyright 2024 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+provider "azurerm" {
+  features {}
+}
+
+# Data source to get the current client configuration
+data "azurerm_client_config" "current" {}
+
+# TODO: add state maintenance in Azure
+
+# Create a resource group
+resource "azurerm_resource_group" "secrets_store_rg" {
+  name     = "secrets-store-csi-driver"
+  location = "westus2"
+  tags = {
+    DO-NOT-DELETE = "contact <[email protected]>"
+  } 
+}
+
+# Create a Key Vault
+resource "azurerm_key_vault" "secrets_csi_kv" {
+  name                        = "secrets-store-csi-e2e"
+  location                    = azurerm_resource_group.secrets_store_rg.location
+  resource_group_name         = azurerm_resource_group.secrets_store_rg.name
+  tenant_id                   = data.azurerm_client_config.current.tenant_id
+  sku_name                    = "standard"
+  
+  depends_on   = [azurerm_resource_group.secrets_store_rg]
+}
+
+# Create a Key Vault access policy for the Service Principal
+resource "azurerm_key_vault_access_policy" "kv_access_service_principal" {
+  key_vault_id = azurerm_key_vault.secrets_csi_kv.id
+  tenant_id = data.azurerm_client_config.current.tenant_id
+  object_id = data.azurerm_client_config.current.object_id
+
+  secret_permissions = [
+    "Set", 
+    "Get"
+  ]
+  depends_on   = [azurerm_key_vault.secrets_csi_kv]
+}
+
+# Create a secret in the Key Vault. 
+# NOTE: This is only used for testing purposes.
+resource "azurerm_key_vault_secret" "kv_secret" {
+  name         = "secret1"
+  value        = "test"
+  key_vault_id = azurerm_key_vault.secrets_csi_kv.id
+  depends_on   = [azurerm_key_vault.secrets_csi_kv]
+}
+
+# To run the Terraform script
+output "key_vault_id" {
+  value = azurerm_key_vault.secrets_csi_kv.id
+}
+
+output "key_vault_secret_id" {
+  value = azurerm_key_vault_secret.kv_secret.id
+}