Add new parameter to prevent grub-mkconfig being run

lib/puppet/provider/grub_config/grub2.rb

@@ -101,6 +101,7 @@ def flush
     fail("Cannot find grub.cfg location to use with grub-mkconfig") unless cfg
 
     super
-    mkconfig "-o", cfg
+
+    mkconfig "-o", cfg if resource[:run_mkconfig]
   end
 end

lib/puppet/provider/grub_menuentry/grub2.rb

@@ -536,7 +536,7 @@ def flush
           FileUtils.rm_f(legacy_target)
 
           # Need to rebuild the full grub config if we removed a legacy target
-          grub2_mkconfig
+          grub2_mkconfig if resource[:run_mkconfig]
         end
       end
     else

lib/puppet/provider/grub_user/grub2.rb

@@ -284,7 +284,7 @@ def flush
       FileUtils.chmod(0755, resource[:target])
     end
 
-    mkconfig "-o", grub2_cfg_path
+    mkconfig "-o", grub2_cfg_path if resource[:run_mkconfig]
   end
 
   private

lib/puppet/provider/kernel_parameter/grub2.rb

@@ -182,8 +182,11 @@ def flush
     fail("Cannot find grub.cfg location to use with grub-mkconfig") unless cfg
 
     super
-    cfg.each {|c|
-      mkconfig "-o", c
-    }
+
+    if resource[:run_mkconfig]
+      cfg.each {|c|
+        mkconfig "-o", c
+      }
+    end
   end
 end

lib/puppet/type/grub_user.rb

@@ -78,6 +78,13 @@
     end
   end
 
+  newparam(:run_mkconfig, :boolean => true) do
+    desc "Whether grub(2)-mkconfig should be ran after updating the GRUB configuration"
+
+    newvalues(:true, :false)
+    defaultto(:true)
+  end
+
   newproperty(:purge, :boolean => true) do
     desc <<-EOM
       Purge all unmanaged users.

lib/puppet/type/kernel_parameter.rb

@@ -32,6 +32,13 @@
     defaultto :all
   end
 
+  newparam(:run_mkconfig, :boolean => true) do
+    desc "Whether grub(2)-mkconfig should be ran after updating the GRUB configuration"
+
+    newvalues(:true, :false)
+    defaultto(:true)
+  end
+
   autorequire(:file) do
     self[:target]
   end

spec/unit/puppet/provider/kernel_parameter/grub2_spec.rb

@@ -74,6 +74,34 @@
         provider_class.any_instance.expects(:mkconfig).with("-o", "/etc/grub2-efi.cfg")
       end
 
+      it "should not run mkconfig if run_mkconfig is false" do
+        provider_class.any_instance.expects(:mkconfig).never
+        provider_class.any_instance.expects(:mkconfig).never
+
+        apply!(Puppet::Type.type(:kernel_parameter).new(
+          :name         => "foo",
+          :ensure       => :present,
+          :target       => target,
+          :provider     => "grub2",
+          :run_mkconfig => false
+        ))
+
+        augparse_filter(target, LENS, FILTER, '
+          { "GRUB_CMDLINE_LINUX"
+            { "quote" = "\"" }
+            { "value" = "quiet" }
+            { "value" = "elevator=noop" }
+            { "value" = "divider=10" }
+            { "value" = "foo" }
+          }
+          { "GRUB_CMDLINE_LINUX_DEFAULT"
+            { "quote" = "\"" }
+            { "value" = "rhgb" }
+            { "value" = "nohz=on" }
+          }
+        ')
+      end
+
       it "should create no-value entries" do
         apply!(Puppet::Type.type(:kernel_parameter).new(
           :name     => "foo",