Adding support for tenancy parameter in placement config.

Gemfile

@@ -6,6 +6,7 @@ gem "test-kitchen"
 gem "winrm-transport"
 gem "winrm-fs"
 gem "activesupport", "~> 4.0"
+gem "faraday-http-cache", "~> 1.3"
 
 group :test do
   gem "rake"

lib/kitchen/driver/aws/instance_generator.rb

@@ -56,6 +56,14 @@ def ec2_instance_data # rubocop:disable Metrics/MethodLength, Metrics/AbcSize
             end
             i[:placement] = { :availability_zone => availability_zone.downcase }
           end
+          tenancy = config[:tenancy]
+          if tenancy && %w[default dedicated].include?(tenancy)
+            if i.key?(:placement)
+              i[:placement][:tenancy] = tenancy
+            else
+              i[:placement] = { :tenancy => tenancy }
+            end
+          end
           unless config[:block_device_mappings].nil? || config[:block_device_mappings].empty?
             i[:block_device_mappings] = config[:block_device_mappings]
           end
@@ -84,6 +92,21 @@ def ec2_instance_data # rubocop:disable Metrics/MethodLength, Metrics/AbcSize
               i[:network_interfaces][0][:groups] = i.delete(:security_group_ids)
             end
           end
+          availability_zone = config[:availability_zone]
+          if availability_zone
+            if availability_zone =~ /^[a-z]$/i
+              availability_zone = "#{config[:region]}#{availability_zone}"
+            end
+            i[:placement] = { :availability_zone => availability_zone.downcase }
+          end
+          tenancy = config[:tenancy]
+          if tenancy && %w[default dedicated].include?(tenancy)
+            if i.key?(:placement)
+              i[:placement][:tenancy] = tenancy
+            else
+              i[:placement] = { :tenancy => tenancy }
+            end
+          end
           unless config[:instance_initiated_shutdown_behavior].nil? ||
               config[:instance_initiated_shutdown_behavior].empty?
             i[:instance_initiated_shutdown_behavior] = config[:instance_initiated_shutdown_behavior]

lib/kitchen/driver/ec2.rb

@@ -81,6 +81,7 @@ class Ec2 < Kitchen::Driver::Base # rubocop:disable Metrics/ClassLength
       default_config :interface,           nil
       default_config :http_proxy,          ENV["HTTPS_PROXY"] || ENV["HTTP_PROXY"]
       default_config :retry_limit,         3
+      default_config :tenancy,             "default"
       default_config :instance_initiated_shutdown_behavior, nil
 
       def initialize(*args, &block)

spec/kitchen/driver/ec2/instance_generator_spec.rb

@@ -200,6 +200,128 @@
       end
     end
 
+    context "when availability_zone and tenancy are provided" do
+      let(:config) do
+        {
+          :region => "eu-east-1",
+          :availability_zone => "c",
+          :tenancy => "dedicated"
+        }
+      end
+      it "adds the region to it in the instance data" do
+        expect(generator.ec2_instance_data).to eq(
+          :instance_type => nil,
+          :ebs_optimized => nil,
+          :image_id => nil,
+          :key_name => nil,
+          :subnet_id => nil,
+          :private_ip_address => nil,
+          :placement => { :availability_zone => "eu-east-1c",
+                          :tenancy => "dedicated" }
+        )
+      end
+    end
+
+    context "when tenancy is provided but availability_zone isn't" do
+      let(:config) do
+        {
+          :region => "eu-east-1",
+          :tenancy => "default"
+        }
+      end
+      it "is not added to the instance data" do
+        expect(generator.ec2_instance_data).to eq(
+          :instance_type => nil,
+          :ebs_optimized => nil,
+          :image_id => nil,
+          :key_name => nil,
+          :subnet_id => nil,
+          :private_ip_address => nil,
+          :placement => { :tenancy => "default" }
+        )
+      end
+    end
+
+    context "when tenancy is not supported" do
+      let(:config) do
+        {
+          :region => "eu-east-1",
+          :tenancy => "ephemeral"
+        }
+      end
+      it "is not added to the instance data" do
+        expect(generator.ec2_instance_data).to eq(
+          :instance_type => nil,
+          :ebs_optimized => nil,
+          :image_id => nil,
+          :key_name => nil,
+          :subnet_id => nil,
+          :private_ip_address => nil
+        )
+      end
+    end
+
+    context "when availability_zone and tenancy are provided" do
+      let(:config) do
+        {
+          :region => "eu-east-1",
+          :availability_zone => "c",
+          :tenancy => "dedicated"
+        }
+      end
+      it "adds the region to it in the instance data" do
+        expect(generator.ec2_instance_data).to eq(
+          :instance_type => nil,
+          :ebs_optimized => nil,
+          :image_id => nil,
+          :key_name => nil,
+          :subnet_id => nil,
+          :private_ip_address => nil,
+          :placement => { :availability_zone => "eu-east-1c",
+                          :tenancy => "dedicated" }
+        )
+      end
+    end
+
+    context "when tenancy is provided but availability_zone isn't" do
+      let(:config) do
+        {
+          :region => "eu-east-1",
+          :tenancy => "default"
+        }
+      end
+      it "is not added to the instance data" do
+        expect(generator.ec2_instance_data).to eq(
+          :instance_type => nil,
+          :ebs_optimized => nil,
+          :image_id => nil,
+          :key_name => nil,
+          :subnet_id => nil,
+          :private_ip_address => nil,
+          :placement => { :tenancy => "default" }
+        )
+      end
+    end
+
+    context "when tenancy is not supported" do
+      let(:config) do
+        {
+          :region => "eu-east-1",
+          :tenancy => "ephemeral"
+        }
+      end
+      it "is not added to the instance data" do
+        expect(generator.ec2_instance_data).to eq(
+          :instance_type => nil,
+          :ebs_optimized => nil,
+          :image_id => nil,
+          :key_name => nil,
+          :subnet_id => nil,
+          :private_ip_address => nil
+        )
+      end
+    end
+
     context "when subnet_id is provided" do
       let(:config) do
         {