fix 101-cosmos-db-free-tier example (#160)

quickstart/101-cosmos-db-free-tier/main.tf

@@ -1,16 +1,16 @@
 resource "azurerm_resource_group" "example" {
-  name     = var.resource_group_name
+  name     = "${random_pet.prefix.id}-rg"
   location = var.location
 }
 
 resource "azurerm_cosmosdb_account" "example" {
-  name                      = var.cosmosdb_account_name
+  name                      = "${random_pet.prefix.id}-cosmosdb-account"
   location                  = var.cosmosdb_account_location
   resource_group_name       = azurerm_resource_group.example.name
   offer_type                = "Standard"
   kind                      = "GlobalDocumentDB"
   enable_automatic_failover = false
-  enable_free_tier = true 
+  enable_free_tier          = true
   geo_location {
     location          = var.location
     failover_priority = 0
@@ -25,18 +25,18 @@ resource "azurerm_cosmosdb_account" "example" {
   ]
 }
 
-resource "azurerm_cosmosdb_sql_database" "example" {
+resource "azurerm_cosmosdb_sql_database" "main" {
-  name                = var.cosmosdb_sqldb_name
+  name                = "${random_pet.prefix.id}-cosmosdb-sqldb"
   resource_group_name = azurerm_resource_group.example.name
   account_name        = azurerm_cosmosdb_account.example.name
   throughput          = var.throughput
 }
 
 resource "azurerm_cosmosdb_sql_container" "example" {
-  name                  = var.sql_container_name
+  name                  = "${random_pet.prefix.id}-sql-container"
   resource_group_name   = azurerm_resource_group.example.name
   account_name          = azurerm_cosmosdb_account.example.name
-  database_name         = azurerm_cosmosdb_sql_database.example.name
+  database_name         = azurerm_cosmosdb_sql_database.main.name
   partition_key_path    = "/definition/id"
   partition_key_version = 1
   throughput            = var.throughput
@@ -61,3 +61,8 @@ resource "azurerm_cosmosdb_sql_container" "example" {
     paths = ["/definition/idlong", "/definition/idshort"]
   }
 }
+
+resource "random_pet" "prefix" {
+  prefix = var.prefix
+  length = 1
+}

quickstart/101-cosmos-db-free-tier/outputs.tf

@@ -3,5 +3,5 @@ output "cosmosdb_account_id" {
 }
 
 output "cosmosdb_sql_database_id" {
-  value = azurerm_cosmosdb_sql_database.example.id
+  value = azurerm_cosmosdb_sql_database.main.id
 }

quickstart/101-cosmos-db-free-tier/providers.tf

@@ -1,8 +1,14 @@
 terraform {
+  required_version = ">= 1.0"
+
   required_providers {
     azurerm = {
       source  = "hashicorp/azurerm"
-      version = ">=3.0.0"
+      version = ">= 3.0, < 4.0"
+    }
+    random = {
+      source  = "hashicorp/random"
+      version = ">= 3.0"
     }
   }
 }

quickstart/101-cosmos-db-free-tier/variables.tf

@@ -1,35 +1,24 @@
-variable "resource_group_name" {
+variable "prefix" {
   type        = string
-  description = "Resource group name"
+  default     = "cosmos-db-free-tier"
+  description = "Prefix of the resource name"
 }
 
 variable "location" {
   type        = string
+  default     = "eastus"
   description = "Resource group location"
 }
 
-variable "cosmosdb_account_name" {
-  type        = string
-  description = "Cosmos db account name"
-}
-
 variable "cosmosdb_account_location" {
   type        = string
+  default     = "eastus"
   description = "Cosmos db account location"
 }
 
-variable "cosmosdb_sqldb_name" {
-  type        = string
-  description = "value"
-}
-
-variable "sql_container_name" {
-  type        = string
-  description = "SQL API container name."
-}
-
 variable "throughput" {
   type        = number
+  default     = 400
   description = "Cosmos db database throughput"
   validation {
     condition     = var.throughput >= 400 && var.throughput <= 1000000