Added support for querying public IP address

Signed-off-by: Bolesław Tekielski <bolek@zeepeetek.pl>

README.md

@@ -150,6 +150,7 @@ The following resources are available in the InSpec Azure Resource Pack
 - [azurerm_postgresql_databases](docs/resources/azurerm_postgresql_databases.md.erb)
 - [azurerm_postgresql_server](docs/resources/azurerm_postgresql_server.md.erb)
 - [azurerm_postgresql_servers](docs/resources/azurerm_postgresql_servers.md.erb)
+- [azurerm_public_ip](docs/resources/azurerm_public_ip.md)
 - [azurerm_resource_groups](docs/resources/azurerm_resource_groups.md)
 - [azurerm_role_definition](docs/resources/azurerm_role_definition.md.erb)
 - [azurerm_role_definitions](docs/resources/azurerm_role_definitions.md.erb)

docs/resources/azurerm_public_ip.md

@@ -0,0 +1,131 @@
+---
+title: About the azurerm_public_ip Resource
+platform: azure
+---
+
+# azurerm\_public\_ip
+
+Use the `azurerm_public_ip` InSpec audit resource to test properties of an Azure Public IP address.
+
+<br />
+
+## Azure REST API version
+
+This resource interacts with version `2020-05-01` of the Azure Management API.
+For more information see the [official Azure documentation](https://docs.microsoft.com/en-us/rest/api/virtualnetwork/publicipaddresses/get).
+
+At the moment, there doesn't appear to be a way to select the version of the
+Azure API docs. If you notice a newer version being referenced in the official
+documentation please open an issue or submit a pull request using the updated
+version.
+
+## Availability
+
+### Installation
+
+This resource is available in the `inspec-azure` [resource
+pack](https://www.inspec.io/docs/reference/glossary/#resource-pack). To use it, add the
+following to your `inspec.yml` in your top-level profile:
+
+    depends:
+      - name: inspec-azure
+        git: https://github.com/inspec/inspec-azure.git
+
+You'll also need to setup your Azure credentials; see the resource pack
+[README](https://github.com/inspec/inspec-azure#inspec-for-azure).
+
+## Syntax
+
+An `azurerm_public_ip` resource block identifies a public IP address by name and Resource Group.
+
+    describe azurerm_public_ip(resource_group: 'example', name: 'addressName') do
+      ...
+    end
+
+<br />
+
+## Examples
+
+### Test that an example Resource Group has the specified IP address
+
+    describe azurerm_public_ip(resource_group: 'example', name: 'public_ip_address') do
+      it { should exist }
+    end
+
+### Test that a specified IP address IP is correct 
+
+    describe azurerm_public_ip(resource_group: 'example', name: 'ClusterName') do
+      its('properties.ipAddress') { should cmp '51.224.11.75' }
+    end
+
+<br />
+
+## Parameters
+
+  - `name`
+  - `resource_group`
+
+## Parameter Examples
+
+The Resource Group as well as the IP address name.
+
+    describe azurerm_public_ip(resource_group: 'example', name: 'public_ip_address') do
+      it { should exist }
+    end
+
+## Attributes
+
+All of the attributes are avialable via dot notation. This is an example of the currently available attributes.
+
+```
+control 'azurerm_public_ip' do
+  describe azurerm_public_ip(resource_group: 'example', name: 'address_name') do
+    it { should exist }
+    its('location') { should cmp 'westeurope' }
+    its('properties.publicIPAddressVersion') { should eq 'IPv4' }
+    its('sku.name') { should eq 'Standard' }
+  end
+end
+```
+
+
+### Other Attributes
+
+There are additional attributes that may be accessed that we have not
+documented. Please take a look at the [Azure documentation](#-Azure-REST-API-version).
+Any attribute in the response may be accessed with the key names separated by
+dots (`.`).
+
+The API may not always return keys that do not have any associated data. There
+may be cases where the deeply nested property may not have the desired
+attribute along your call chain. If you find yourself writing tests against
+properties that may be nil, fork this resource pack and add an accessor to the
+resource. Within that accessor you'll be able to guard against nil keys. Pull
+requests are always welcome.
+
+## Matchers
+
+This InSpec audit resource has the following special matchers. For a full list of
+available matchers, please visit our [Universal Matchers
+page](https://www.inspec.io/docs/reference/matchers/).
+
+### exists
+
+The control will pass if the resource returns a result. Use `should_not` if you expect
+zero matches.
+
+    # If we expect 'AddressName' to always exist
+    describe azurerm_public_ip(resource_group: 'example', name: 'AddressName') do
+      it { should exist }
+    end
+
+    # If we expect 'AddressName' to never exist
+    describe azurerm_public_ip(resource_group: 'example', name: 'AddressName') do
+      it { should_not exist }
+    end
+
+## Azure Permissions
+
+Your [Service
+Principal](https://docs.microsoft.com/en-us/azure/azure-resource-manager/resource-group-create-service-principal-portal)
+must be setup with a `contributor` role on the subscription you wish to test.

libraries/azurerm_public_ip.rb

@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+require 'azurerm_resource'
+
+class AzurermPublicIp < AzurermSingularResource
+  name 'azurerm_public_ip'
+  desc 'Verifies settings for public IP address'
+  example <<-EXAMPLE
+    describe azurerm_public_ip(resource_group: 'example', name: 'name') do
+      its(name) { should eq 'name'}
+    end
+  EXAMPLE
+
+  ATTRS = %i(
+    name
+    id
+    etag
+    type
+    location
+    tags
+    properties
+  ).freeze
+
+  attr_reader(*ATTRS)
+
+  def initialize(resource_group: nil, name: nil)
+    resp = management.public_ip(resource_group, name)
+    return if has_error?(resp)
+
+    assign_fields(ATTRS, resp)
+
+    @exists = true
+  end
+
+  def to_s
+    "'#{name}' Public IP address"
+  end
+end

libraries/support/azure/management.rb

@@ -287,6 +287,14 @@ def postgresql_databases(resource_group, server_name)
       )
     end
 
+    def public_ip(resource_group, address_name)
+      get(
+        url: link(location: "Microsoft.Network/publicIPAddresses/#{address_name}",
+                  resource_group: resource_group),
+        api_version: '2020-05-01',
+      )
+    end
+
     def resource_groups
       get(
         url: link(location: 'resourcegroups', provider: false),

terraform/azure.tf

@@ -1033,3 +1033,17 @@ resource "azurerm_application_gateway" "network" {
     policy_type = "Predefined"
   }
 }
+
+resource "random_string" "ip-address-random" {
+  length  = 10
+  special = false
+  upper   = false
+}
+
+resource "azurerm_public_ip" "public_ip_address" {
+  count               = var.public_ip_address_count
+  name                = random_string.ip-address-random.result
+  location            = var.location
+  resource_group_name = azurerm_resource_group.rg.name
+  allocation_method   = "Dynamic"
+}

terraform/outputs.tf

@@ -314,4 +314,9 @@ output "application_gateway_name" {
 output "hdinsight_cluster_name" {
   description = "HDINSIGHT cluster name."
   value = var.hd_insight_count > 0 ? azurerm_hdinsight_interactive_query_cluster.hdinsight_cluster.0.name : ""
+}
+
+output "ip_address_name" {
+  description = "tha name of the azurerm_public_ip"
+  value = var.public_ip_address_count > 0 ? azurerm_public_ip.public_ip_address[0].name : ""
 }

terraform/variables.tf

@@ -98,4 +98,9 @@ variable "lb_port" {
 variable "hd_insight_count" {
   # This is added due to resource constraints.
   default = 0
+}
+
+variable "public_ip_address_count" {
+  # This is added due to resource constraints.
+  default = 1
 }

test/integration/verify/controls/azurerm_public_ip.rb

@@ -0,0 +1,22 @@
+resource_group = input('resource_group', value: nil)
+address_name = input('ip_address_name', value: '')
+
+control 'azurerm_public_ip' do
+  only_if { !address_name.empty? }
+  describe azurerm_public_ip(resource_group: resource_group, name: address_name) do
+    it                                                       { should exist }
+    its('name')                                              { should cmp address_name }
+    its('type')                                              { should cmp 'Microsoft.Network/publicIPAddresses' }
+    its('properties.provisioningState')                      { should cmp 'Succeeded' }
+    its('properties.publicIPAddressVersion')                 { should eq 'IPv4' }
+    its('sku.name')                                          { should eq 'Standard' }
+  end
+
+  describe azurerm_public_ip(resource_group: resource_group, name: 'fake') do
+    it { should_not exist }
+  end
+
+  describe azurerm_public_ip(resource_group: 'does-not-exist', name: 'fake') do
+    it { should_not exist }
+  end
+end