Merge pull request #6662 from lukebakken/fixes/lrb/gh-4503-hyper-v-admin-privs

Fix for 4503

lib/vagrant/util/platform.rb

@@ -61,6 +61,25 @@ module Vagrant
           (`reg query HKU\\S-1-5-19 2>&1` =~ /ERROR/).nil?
         end
 
+        # Checks if the user running Vagrant on Windows is a member of the
+        # "Hyper-V Administrators" group.
+        #
+        # From: https://support.microsoft.com/en-us/kb/243330
+        # SID: S-1-5-32-578 
+        # Name: BUILTIN\Hyper-V Administrators
+        #
+        # @return [Boolean]
+        def windows_hyperv_admin?
+            begin
+              username = ENV["USERNAME"]
+              process = Subprocess.execute("net", "localgroup", "Hyper-V Administrators")
+              output = process.stdout.chomp 
+              return output.include?(username)
+            rescue Errors::CommandUnavailableWindows
+              return false
+            end
+        end
+
         # This takes any path and converts it from a Windows path to a
         # Cygwin or msys style path.
         #

plugins/providers/hyperv/provider.rb

@@ -16,7 +16,8 @@ module VagrantPlugins
           raise Errors::WindowsRequired
         end
 
-        if !Vagrant::Util::Platform.windows_admin?
+        if !Vagrant::Util::Platform.windows_admin? and
+           !Vagrant::Util::Platform.windows_hyperv_admin?
             raise Errors::AdminRequired
         end
 

test/unit/plugins/providers/hyperv/provider_test.rb

@@ -15,6 +15,7 @@ describe VagrantPlugins::HyperV::Provider do
     machine.stub(id: "foo")
     platform.stub(windows?: true)
     platform.stub(windows_admin?: true)
+    platform.stub(windows_hyperv_admin?: true)
     powershell.stub(available?: true)
   end
 
@@ -26,11 +27,18 @@ describe VagrantPlugins::HyperV::Provider do
       expect(subject).to_not be_usable
     end
 
-    it "returns false if not an admin" do
+    it "returns false if neither an admin nor a hyper-v admin" do
       platform.stub(windows_admin?: false)
+      platform.stub(windows_hyperv_admin?: false)
       expect(subject).to_not be_usable
     end
 
+    it "returns true if not an admin but is a hyper-v admin" do
+      platform.stub(windows_admin?: false)
+      platform.stub(windows_hyperv_admin?: true)
+      expect(subject).to be_usable
+    end
+
     it "returns false if powershell is not available" do
       powershell.stub(available?: false)
       expect(subject).to_not be_usable
@@ -43,8 +51,17 @@ describe VagrantPlugins::HyperV::Provider do
         to raise_error(VagrantPlugins::HyperV::Errors::WindowsRequired)
     end
 
-    it "raises an exception if not an admin" do
+    it "raises an exception if neither an admin nor a hyper-v admin" do
       platform.stub(windows_admin?: false)
+      platform.stub(windows_hyperv_admin?: false)
+
+      expect { subject.usable?(true) }.
+        to raise_error(VagrantPlugins::HyperV::Errors::AdminRequired)
+    end
+
+    it "raises an exception if neither an admin nor a hyper-v admin" do
+      platform.stub(windows_admin?: false)
+      platform.stub(windows_hyperv_admin?: false)
 
       expect { subject.usable?(true) }.
         to raise_error(VagrantPlugins::HyperV::Errors::AdminRequired)