terraform thinks this always needs changes

gistfile1.txt

Always wants to make these changes:

  ~ azurerm_virtual_machine_scale_set.test
      sku.2127356410.capacity: "4" => "0"
      sku.2127356410.name:     "Standard_A0" => ""
      sku.680937084.capacity:  "" => "2"
      sku.680937084.name:      "" => "Standard_A0"
      sku.680937084.tier:      "" => "Standard"

--------

variable "time_zone" {
  type    = "string"
  default = "Pacific Standard Time"
}

variable "adminPwd" {
  type    = "string"
  default = "^l&f_ZwX2L4C"
}

resource "azurerm_resource_group" "test" {
  name     = "stephwe-autoscalingTest2"
  location = "West US"
}

resource "azurerm_autoscale_setting" "test" {
  name                = "myAutoscaleSetting"
  enabled             = true
  resource_group_name = "${azurerm_resource_group.test.name}"
  location            = "${azurerm_resource_group.test.location}"
  target_resource_uri = "${azurerm_virtual_machine_scale_set.test.id}"
  profile {
    name = "defaultProfile"
    capacity {
      default = 1
      minimum = 1
      maximum = 10
    }
    
/*    rule {
      "metric_trigger" {
        "metric_name"         = "Percentage CPU"
        "metric_resource_uri" = "${azurerm_virtual_machine_scale_set.test.id}"
        "time_grain"          = "PT30S" //"PT1M"
        "statistic"           = "Average"
        "time_window"         = "PT5M"
        "time_aggregation"    = "Average"
        "operator"            = "GreaterThan"
        "threshold"           = 2
      }
      "scale_action" {
        "direction" = "Increase"
        "type"      = "ChangeCount"
        "value"     = "2"
        "cooldown"  = "PT1M"
      }
    }*/
    rule {
      "metric_trigger" {
        "metric_name"         = "Percentage CPU"
        "metric_resource_uri" = "${azurerm_virtual_machine_scale_set.test.id}"
        "time_grain"          = "PT1M"
        "statistic"           = "Average"
        "time_window"         = "PT5M"
        "time_aggregation"    = "Average"
        "operator"            = "GreaterThan"
        "threshold"           = 3
      }
      "scale_action" {
        "direction" = "Increase"
        "type"      = "ChangeCount"
        "value"     = "3"
        "cooldown"  = "PT1M"
      }
    }
    rule {
      "metric_trigger" {
        "metric_name"         = "Percentage CPU"
        "metric_resource_uri" = "${azurerm_virtual_machine_scale_set.test.id}"
        "time_grain"          = "PT1M"
        "statistic"           = "Average"
        "time_window"         = "PT5M"
        "time_aggregation"    = "Average"
        "operator"            = "LessThan"
        "threshold"           = "1"
      }
      "scale_action" {
        "direction" = "Increase"
        "type"      = "ChangeCount"
        "value"     = "2"
        "cooldown"  = "PT1M"
      }
    }
  }

  notification {
    "operation" = "Scale"
    "email" {
      "send_to_subscription_administrator"    = true
      "send_to_subscription_co_administrator" = true
    }
  }
}

resource "azurerm_virtual_network" "test" { 
  name                = "acctvn" 
  address_space       = ["10.0.0.0/16"] 
  location            = "${azurerm_resource_group.test.location}" 
  resource_group_name = "${azurerm_resource_group.test.name}" 
} 
 
resource "azurerm_subnet" "test" { 
  name                 = "acctsub" 
  resource_group_name  = "${azurerm_resource_group.test.name}" 
  virtual_network_name = "${azurerm_virtual_network.test.name}" 
  address_prefix       = "10.0.2.0/24" 
} 
 
resource "azurerm_public_ip" "test" { 
  name                         = "acctPublicIp" 
  location                     = "${azurerm_resource_group.test.location}" 
  resource_group_name          = "${azurerm_resource_group.test.name}" 
  public_ip_address_allocation = "static" 
} 
 
resource "azurerm_lb" "test" { 
  name                = "acctlb" 
  location            = "${azurerm_resource_group.test.location}" 
  resource_group_name = "${azurerm_resource_group.test.name}" 

  frontend_ip_configuration { 
    name                 = "PublicIPAddress" 
    public_ip_address_id = "${azurerm_public_ip.test.id}" 
  } 
} 
 
resource "azurerm_lb_backend_address_pool" "bpepool" { 
  name                = "BackEndAddressPool" 
  resource_group_name = "${azurerm_resource_group.test.name}" 
  loadbalancer_id     = "${azurerm_lb.test.id}" 
} 
 
resource "azurerm_lb_nat_pool" "lbnatpool" { 
  count                          = 3 
  resource_group_name            = "${azurerm_resource_group.test.name}" 
  name                           = "ssh" 
  loadbalancer_id                = "${azurerm_lb.test.id}" 
  protocol                       = "Tcp" 
  frontend_port_start            = 50000 
  frontend_port_end              = 50119 
  backend_port                   = 22 
  frontend_ip_configuration_name = "PublicIPAddress" 
} 
 
resource "azurerm_virtual_machine_scale_set" "test" { 
  name                = "myTestScaleset-1" 
  location            = "${azurerm_resource_group.test.location}" 
  resource_group_name = "${azurerm_resource_group.test.name}" 
  upgrade_policy_mode = "Manual" 
 
  sku { 
    name     = "Standard_A0" 
    tier     = "Standard" 
    capacity = 2 
  } 
 
  storage_profile_image_reference { 
    publisher = "Canonical" 
    offer     = "UbuntuServer" 
    sku       = "14.04.2-LTS" 
    version   = "latest" 
  } 
 
  storage_profile_os_disk { 
    name              = "" 
    caching           = "ReadWrite" 
    create_option     = "FromImage" 
    managed_disk_type = "Standard_LRS" 
  } 
 
  storage_profile_data_disk { 
      lun          = 0 
    caching        = "ReadWrite" 
    create_option  = "Empty" 
    disk_size_gb   = 10  
  } 
 
  os_profile { 
    computer_name_prefix = "testvm" 
    admin_username       = "myadmin" 
    admin_password       = "${var.adminPwd}" 
  } 
 
  os_profile_linux_config { 
    disable_password_authentication = false 
  } 
 
  network_profile { 
    name    = "terraformnetworkprofile" 
    primary = true 
 
    ip_configuration { 
      name                                   = "TestIPConfiguration" 
      subnet_id                              = "${azurerm_subnet.test.id}" 
      load_balancer_backend_address_pool_ids = ["${azurerm_lb_backend_address_pool.bpepool.id}"] 
      load_balancer_inbound_nat_rules_ids    = ["${element(azurerm_lb_nat_pool.lbnatpool.*.id, count.index)}"] 
    } 
  } 
 
  tags { 
    environment = "staging" 
  } 
}