provider/azurerm: Add example of 2 VMs with loadbalancer & lbrules (#14257)

* initial commit - 101-vm-from-user-image

* changed branch name

* not deploying - storage problems

* provisions vm but image not properly prepared

* storage not correct

* provisions properly

* changed main.tf to azuredeploy.tf

* added tfvars and info for README

* tfvars ignored and corrected file ext

* added CI config; added sane defaults for variables; updated deployment script, added mac specific deployment for local testing

* deploy.sh to be executable

* executable deploy files

* added CI files; changed vars

* prep for PR

* removal of old folder

* prep for PR

* wrong args for travis

* initial commit

* more PR prep

* updated README

* commented out variables in terraform.tfvars

* Topic 101 vm from user image (#2)

* initial commit - 101-vm-from-user-image
* added tfvars and info for README
* added CI config; added sane defaults for variables; updated deployment script, added mac specific deployment for local testing
* prep for PR

* added new template

* oops, left off master

* need to change lb_rule & nic

* prep for PR

* correct repository for destination

* renamed scripts to be more intuitive; added check for docker

* deploys locally

* merge vm simple; vm from image

* updated README

* initial commit

* deploys locally

* updated deploy

* consolidated deploy and after_deploy into a single script; simplified ci process; added os_profile_linux_config

* added terraform show

* changed to allow http & https (like ARM tmplt)

* changed host_name & host_name variable desc

* added az cli check

* on this branch, only build test_dir; master will aggregate all the examples

* merge master

* added new constructs/naming for deploy scripts, etc.

* suppress az login output

* suppress az login output

* forgot about line breaks

* breaking build as an example

* fixing broken build example

* updated travis and deploy scripts for Hari's repo

* renamed deploy script

* clean up

* prep for PR

* updated readme

* merge of CI config

* fixed grammar in readme

* prep for PR

* took out armviz button and minor README changes

* changed host_name

* fixed merge conflicts

* changed host_name variable

* updating Hashicorp's changes to merged simple linux branch

* updating files to merge w/master and prep for Hashicorp pr

* Revert "updating files to merge w/master and prep for Hashicorp pr"

This reverts commit b850cd5d2a858eff073fc5a1097a6813d0f8b362.

* Revert "updating Hashicorp's changes to merged simple linux branch"

This reverts commit dbaf8d14a9cdfcef0281919671357f6171ebd4e6.

* fixing conflict in .travis.yml

* removing vm from user image example from this branch

* removed old branch

* removing unmerged example

examples/azure-2-vms-loadbalancer-lbrules/README.md

@@ -0,0 +1,22 @@
+# Create 2 Virtual Machines under a Load balancer and configures Load Balancing rules for the VMs
+
+This Terraform template was based on [this](https://github.com/Azure/azure-quickstart-templates/tree/master/201-2-vms-loadbalancer-lbrules) Azure Quickstart Template. Changes to the ARM template may have occured since the creation of this example may not be reflected here.
+
+This template allows you to create 2 Virtual Machines under a Load balancer and configure a load balancing rule on Port 80. This template also deploys a Storage Account, Virtual Network, Public IP address, Availability Set, and Network Interfaces.
+
+## main.tf
+The `main.tf` file contains the actual resources that will be deployed. It also contains the Azure Resource Group definition and any defined variables. 
+
+## outputs.tf
+This data is outputted when `terraform apply` is called, and can be queried using the `terraform output` command.
+
+## provider.tf
+Azure requires that an application is added to Azure Active Directory to generate the `client_id`, `client_secret`, and `tenant_id` needed by Terraform (`subscription_id` can be recovered from your Azure account details). Please go [here](https://www.terraform.io/docs/providers/azurerm/) for full instructions on how to create this to populate your `provider.tf` file.
+
+## terraform.tfvars
+If a `terraform.tfvars` file is present in the current directory, Terraform automatically loads it to populate variables. We don't recommend saving usernames and password to version control, but you can create a local secret variables file and use `-var-file` to load it.
+
+If you are committing this template to source control, please insure that you add this file to your .gitignore file.
+
+## variables.tf
+The `variables.tf` file contains all of the input parameters that the user can specify when deploying this Terraform template.

examples/azure-2-vms-loadbalancer-lbrules/deploy.ci.sh

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+#!/bin/bash
+
+set -o errexit -o nounset
+
+docker run --rm -it \
+  -e ARM_CLIENT_ID \
+  -e ARM_CLIENT_SECRET \
+  -e ARM_SUBSCRIPTION_ID \
+  -e ARM_TENANT_ID \
+  -v $(pwd):/data \
+  --entrypoint "/bin/sh" \
+  hashicorp/terraform:light \
+  -c "cd /data; \
+      /bin/terraform get; \
+      /bin/terraform validate; \
+      /bin/terraform plan -out=out.tfplan -var dns_name=$KEY -var hostname=$KEY -var lb_ip_dns_name=$KEY -var resource_group=$KEY -var admin_password=$PASSWORD; \
+      /bin/terraform apply out.tfplan"
+
+# cleanup deployed azure resources via azure-cli
+docker run --rm -it \
+  azuresdk/azure-cli-python \
+  sh -c "az login --service-principal -u $ARM_CLIENT_ID -p $ARM_CLIENT_SECRET --tenant $ARM_TENANT_ID > /dev/null; \
+         az network lb show -g $KEY -n rglb; \
+         az network lb rule list -g $KEY --lb-name rglb;"
+
+# cleanup deployed azure resources via terraform
+docker run --rm -it \
+  -e ARM_CLIENT_ID \
+  -e ARM_CLIENT_SECRET \
+  -e ARM_SUBSCRIPTION_ID \
+  -e ARM_TENANT_ID \
+  -v $(pwd):/data \
+  --workdir=/data \
+  --entrypoint "/bin/sh" \
+  hashicorp/terraform:light \
+  -c "/bin/terraform destroy -force -var dns_name=$KEY -var hostname=$KEY -var lb_ip_dns_name=$KEY -var resource_group=$KEY -var admin_password=$PASSWORD;"

examples/azure-2-vms-loadbalancer-lbrules/deploy.mac.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+set -o errexit -o nounset
+
+if docker -v; then
+
+  # generate a unique string for CI deployment
+  export KEY=$(cat /dev/urandom | env LC_CTYPE=C tr -cd 'a-z' | head -c 12)
+  export PASSWORD=$KEY$(cat /dev/urandom | env LC_CTYPE=C tr -cd 'A-Z' | head -c 2)$(cat /dev/urandom | env LC_CTYPE=C tr -cd '0-9' | head -c 2)
+
+/bin/sh ./deploy.ci.sh
+
+else
+  echo "Docker is used to run terraform commands, please install before run:  https://docs.docker.com/docker-for-mac/install/"
+fi

examples/azure-2-vms-loadbalancer-lbrules/main.tf

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+# provider "azurerm" {
+#   subscription_id = "REPLACE-WITH-YOUR-SUBSCRIPTION-ID"
+#   client_id       = "REPLACE-WITH-YOUR-CLIENT-ID"
+#   client_secret   = "REPLACE-WITH-YOUR-CLIENT-SECRET"
+#   tenant_id       = "REPLACE-WITH-YOUR-TENANT-ID"
+# }
+
+resource "azurerm_resource_group" "rg" {
+  name     = "${var.resource_group}"
+  location = "${var.location}"
+}
+
+resource "azurerm_storage_account" "stor" {
+  name                = "${var.dns_name}stor"
+  location            = "${var.location}"
+  resource_group_name = "${azurerm_resource_group.rg.name}"
+  account_type        = "${var.storage_account_type}"
+}
+
+resource "azurerm_availability_set" "avset" {
+  name                         = "${var.dns_name}avset"
+  location                     = "${var.location}"
+  resource_group_name          = "${azurerm_resource_group.rg.name}"
+  platform_fault_domain_count  = 2
+  platform_update_domain_count = 2
+  managed                      = true
+}
+
+resource "azurerm_public_ip" "lbpip" {
+  name                         = "${var.rg_prefix}-ip"
+  location                     = "${var.location}"
+  resource_group_name          = "${azurerm_resource_group.rg.name}"
+  public_ip_address_allocation = "dynamic"
+  domain_name_label            = "${var.lb_ip_dns_name}"
+}
+
+resource "azurerm_virtual_network" "vnet" {
+  name                = "${var.virtual_network_name}"
+  location            = "${var.location}"
+  address_space       = ["${var.address_space}"]
+  resource_group_name = "${azurerm_resource_group.rg.name}"
+}
+
+resource "azurerm_subnet" "subnet" {
+  name                 = "${var.rg_prefix}subnet"
+  virtual_network_name = "${azurerm_virtual_network.vnet.name}"
+  resource_group_name  = "${azurerm_resource_group.rg.name}"
+  address_prefix       = "${var.subnet_prefix}"
+}
+
+resource "azurerm_lb" "lb" {
+  resource_group_name = "${azurerm_resource_group.rg.name}"
+  name                = "${var.rg_prefix}lb"
+  location            = "${var.location}"
+
+  frontend_ip_configuration {
+    name                 = "LoadBalancerFrontEnd"
+    public_ip_address_id = "${azurerm_public_ip.lbpip.id}"
+  }
+}
+
+resource "azurerm_lb_backend_address_pool" "backend_pool" {
+  resource_group_name = "${azurerm_resource_group.rg.name}"
+  loadbalancer_id     = "${azurerm_lb.lb.id}"
+  name                = "BackendPool1"
+}
+
+resource "azurerm_lb_nat_rule" "tcp" {
+  resource_group_name            = "${azurerm_resource_group.rg.name}"
+  loadbalancer_id                = "${azurerm_lb.lb.id}"
+  name                           = "RDP-VM-${count.index}"
+  protocol                       = "tcp"
+  frontend_port                  = "5000${count.index + 1}"
+  backend_port                   = 3389
+  frontend_ip_configuration_name = "LoadBalancerFrontEnd"
+  count                          = 2
+}
+
+resource "azurerm_lb_rule" "lb_rule" {
+  resource_group_name            = "${azurerm_resource_group.rg.name}"
+  loadbalancer_id                = "${azurerm_lb.lb.id}"
+  name                           = "LBRule"
+  protocol                       = "tcp"
+  frontend_port                  = 80
+  backend_port                   = 80
+  frontend_ip_configuration_name = "LoadBalancerFrontEnd"
+  enable_floating_ip             = false
+  backend_address_pool_id        = "${azurerm_lb_backend_address_pool.backend_pool.id}"
+  idle_timeout_in_minutes        = 5
+  probe_id                       = "${azurerm_lb_probe.lb_probe.id}"
+  depends_on                     = ["azurerm_lb_probe.lb_probe"]
+}
+
+resource "azurerm_lb_probe" "lb_probe" {
+  resource_group_name = "${azurerm_resource_group.rg.name}"
+  loadbalancer_id     = "${azurerm_lb.lb.id}"
+  name                = "tcpProbe"
+  protocol            = "tcp"
+  port                = 80
+  interval_in_seconds = 5
+  number_of_probes    = 2
+}
+
+resource "azurerm_network_interface" "nic" {
+  name                = "nic${count.index}"
+  location            = "${var.location}"
+  resource_group_name = "${azurerm_resource_group.rg.name}"
+  count               = 2
+
+  ip_configuration {
+    name                                    = "ipconfig${count.index}"
+    subnet_id                               = "${azurerm_subnet.subnet.id}"
+    private_ip_address_allocation           = "Dynamic"
+    load_balancer_backend_address_pools_ids = ["${azurerm_lb_backend_address_pool.backend_pool.id}"]
+    load_balancer_inbound_nat_rules_ids     = ["${element(azurerm_lb_nat_rule.tcp.*.id, count.index)}"]
+  }
+}
+
+resource "azurerm_virtual_machine" "vm" {
+  name                  = "vm${count.index}"
+  location              = "${var.location}"
+  resource_group_name   = "${azurerm_resource_group.rg.name}"
+  availability_set_id   = "${azurerm_availability_set.avset.id}"
+  vm_size               = "${var.vm_size}"
+  network_interface_ids = ["${element(azurerm_network_interface.nic.*.id, count.index)}"]
+  count                 = 2
+
+  storage_image_reference {
+    publisher = "${var.image_publisher}"
+    offer     = "${var.image_offer}"
+    sku       = "${var.image_sku}"
+    version   = "${var.image_version}"
+  }
+
+  storage_os_disk {
+    name          = "osdisk${count.index}"
+    create_option = "FromImage"
+  }
+
+  os_profile {
+    computer_name  = "${var.hostname}"
+    admin_username = "${var.admin_username}"
+    admin_password = "${var.admin_password}"
+  }
+}

examples/azure-2-vms-loadbalancer-lbrules/outputs.tf

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+output "hostname" {
+  value = "${var.hostname}"
+}
+
+output "vm_fqdn" {
+  value = "${azurerm_public_ip.lbpip.fqdn}"
+}
+
+output "ssh_command" {
+  value = "ssh ${var.admin_username}@${azurerm_public_ip.lbpip.fqdn}"
+}

examples/azure-2-vms-loadbalancer-lbrules/variables.tf

@@ -0,0 +1,79 @@
+variable "resource_group" {
+  description = "The name of the resource group in which to create the virtual network."
+}
+
+variable "rg_prefix" {
+  description = "The shortened abbreviation to represent your resource group that will go on the front of some resources."
+  default     = "rg"
+}
+
+variable "hostname" {
+  description = "VM name referenced also in storage-related names."
+}
+
+variable "dns_name" {
+  description = " Label for the Domain Name. Will be used to make up the FQDN. If a domain name label is specified, an A DNS record is created for the public IP in the Microsoft Azure DNS system."
+}
+
+variable "lb_ip_dns_name" {
+  description = "DNS for Load Balancer IP"
+}
+
+variable "location" {
+  description = "The location/region where the virtual network is created. Changing this forces a new resource to be created."
+  default     = "southcentralus"
+}
+
+variable "virtual_network_name" {
+  description = "The name for the virtual network."
+  default     = "vnet"
+}
+
+variable "address_space" {
+  description = "The address space that is used by the virtual network. You can supply more than one address space. Changing this forces a new resource to be created."
+  default     = "10.0.0.0/16"
+}
+
+variable "subnet_prefix" {
+  description = "The address prefix to use for the subnet."
+  default     = "10.0.10.0/24"
+}
+
+variable "storage_account_type" {
+  description = "Defines the type of storage account to be created. Valid options are Standard_LRS, Standard_ZRS, Standard_GRS, Standard_RAGRS, Premium_LRS. Changing this is sometimes valid - see the Azure documentation for more information on which types of accounts can be converted into other types."
+  default     = "Standard_LRS"
+}
+
+variable "vm_size" {
+  description = "Specifies the size of the virtual machine."
+  default     = "Standard_D1"
+}
+
+variable "image_publisher" {
+  description = "name of the publisher of the image (az vm image list)"
+  default     = "MicrosoftWindowsServer"
+}
+
+variable "image_offer" {
+  description = "the name of the offer (az vm image list)"
+  default     = "WindowsServer"
+}
+
+variable "image_sku" {
+  description = "image sku to apply (az vm image list)"
+  default     = "2012-R2-Datacenter"
+}
+
+variable "image_version" {
+  description = "version of the image to apply (az vm image list)"
+  default     = "latest"
+}
+
+variable "admin_username" {
+  description = "administrator user name"
+  default     = "vmadmin"
+}
+
+variable "admin_password" {
+  description = "administrator password (recommended to disable password auth)"
+}