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provider "azurerm" {
  subscription_id = var.subscription_id
  client_id = var.client_id
  client_secret = var.client_secret
  tenant_id = var.tenant_id
}

resource "azurerm_lb" "lb" {
  name = "example-lb"
  location = var.location
  frontend_ip_configurations {
    name = "example-fip"
    public_ip_address {
      name = "example-pip"
      allocation_method = "Dynamic"
    }
  }
  backend_address_pools {
    name = "example-backend-pool"
  }
  load_balancing_rules {
    name = "example-rule"
    frontend_port = 80
    backend_port = 80
    frontend_ip_configuration_ids = [azurerm_lb.lb.frontend_ip_configurations[0].id]
    backend_address_pool_ids = [azurerm_lb.lb.backend_address_pools[0].id]
  }
}

resource "azurerm_vm" "vm" {
  count = var.vm_count
  name = "example-vm-${count.index}"
  location = var.location
  resource_group_name = azurerm_lb.lb.resource_group_name
  vm_size = "Standard_D2s_v3"
  network_interface_ids = [azurerm_network_interface.nic-${count.index}.id]
}

resource "azurerm_network_interface" "nic" {
  count = var.vm_count
  name = "example-nic-${count.index}"
  location = var.location
  resource_group_name = azurerm_lb.lb.resource_group_name
  ip_configurations {
    name = "example-ipconfig-${count.index}"
    public_ip_address_allocation = "Dynamic"
    load_balancer_backend_address_pool_ids = [azurerm_lb.lb.backend_address_pools[0].id]
  }
}

output "lb_public_ip" {
  value = azurerm_lb.lb.frontend_ip_configurations[0].public_ip_address.ip_address
}

output "vm_ip_addresses" {
  value = azurerm_network_interface.nic[*].ip_configurations[*].private_ip_address
}