Add support for additional properties for Zpool.

ashift (Only valid on linux)
autoexpand
failmode.

lib/puppet/provider/zpool/zpool.rb

@@ -11,6 +11,13 @@ def self.instances
     end
   end
 
+  def get_zpool_property(prop)
+    zpool(:get, prop, @resource[:name]).split("\n").reverse.map { |line|
+      name, _property, value, _source = line.split("\s")
+      value if name == @resource[:name]
+    }.shift
+  end
+
   def process_zpool_data(pool_array)
     if pool_array == []
       return Hash.new(:absent)
@@ -115,8 +122,18 @@ def build_vdevs
     end
   end
 
+  def add_pool_properties
+    properties = []
+    [:ashift, :autoexpand, :failmode].each do |property|
+      if (value = @resource[property]) && value != ''
+        properties << '-o' << "#{property}=#{value}"
+      end
+    end
+    properties
+  end
+
   def create
-    zpool(*([:create, @resource[:pool]] + build_vdevs + build_named('spare') + build_named('log')))
+    zpool(*([:create] + add_pool_properties + [@resource[:pool]] + build_vdevs + build_named('spare') + build_named('log')))
   end
 
   def destroy
@@ -141,4 +158,36 @@ def exists?
       fail "zpool #{field} can't be changed. should be #{should}, currently is #{current_pool[field]}"
     end
   end
+
+  [:autoexpand, :failmode].each do |field|
+    define_method(field) do
+      get_zpool_property(field)
+    end
+
+    define_method(field.to_s + '=') do |should|
+      zpool(:set, "#{field}=#{should}", @resource[:name])
+    end
+  end
+
+  # Borrow the code from the ZFS provider here so that we catch and return '-'
+  # as ashift is linux only.
+  # see lib/puppet/provider/zfs/zfs.rb
+
+  PARAMETER_UNSET_OR_NOT_AVAILABLE = '-'.freeze
+
+  define_method(:ashift) do
+    begin
+      get_zpool_property(:ashift)
+    rescue
+      PARAMETER_UNSET_OR_NOT_AVAILABLE
+    end
+  end
+
+  define_method('ashift=') do |should|
+    begin
+      zpool(:set, "ashift=#{should}", @resource[:name])
+    rescue
+      PARAMETER_UNSET_OR_NOT_AVAILABLE
+    end
+  end
 end

lib/puppet/type/zpool.rb

@@ -90,6 +90,22 @@ def insync?(is)
       desc 'Log disks for this pool. This type does not currently support mirroring of log disks.'
     end
 
+    newproperty(:ashift) do
+      desc 'The Alignment Shift for the vdevs in the given pool.'
+
+      validate do |_value|
+        raise Puppet::Error _('This property is only supported on Linux and FreeBSD') unless Facter.value(:kernel) == 'Linux' || Facter.value(:kernel) == 'FreeBSD'
+      end
+    end
+
+    newproperty(:autoexpand) do
+      desc 'The autoexpand setting for the given pool. Valid values are `on` or `off`'
+    end
+
+    newproperty(:failmode) do
+      desc 'The failmode setting for the given pool. Valid values are `wait`, `continue` or `panic`'
+    end
+
     newparam(:pool) do
       desc 'The name for this pool.'
       isnamevar

spec/unit/provider/zpool/zpool_spec.rb

@@ -158,6 +158,42 @@
     end
   end
 
+  describe 'when calling the getters and setters for configurable options' do
+    [:autoexpand, :failmode].each do |field|
+      it "should get the #{field} value from the pool" do
+        allow(provider).to receive(:zpool).with(:get, field, name).and_return("NAME PROPERTY VALUE SOURCE\n#{name} #{field} value local")
+        expect(provider.send(field)).to eq('value')
+      end
+      it "should set #{field}=value" do
+        expect(provider).to receive(:zpool).with(:set, "#{field}=value", name)
+        provider.send("#{field}=", 'value')
+      end
+    end
+  end
+  describe 'when calling the getters and setters for ashift' do
+    context 'when available' do
+      it "gets 'ashift' property" do
+        expect(provider).to receive(:zpool).with(:get, :ashift, name).and_return("NAME PROPERTY VALUE SOURCE\n#{name} ashift value local")
+        expect(provider.send('ashift')).to eq('value')
+      end
+      it 'sets ashift=value' do
+        expect(provider).to receive(:zpool).with(:set, 'ashift=value', name)
+        provider.send('ashift=', 'value')
+      end
+    end
+
+    context 'when not available' do
+      it "gets '-' for the ashift property" do
+        expect(provider).to receive(:zpool).with(:get, :ashift, name).and_raise(RuntimeError, 'not valid')
+        expect(provider.send('ashift')).to eq('-')
+      end
+      it 'does not error out when trying to set ashift' do
+        expect(provider).to receive(:zpool).with(:set, 'ashift=value', name).and_raise(RuntimeError, 'not valid')
+        expect { provider.send('ashift=', 'value') }.not_to raise_error
+      end
+    end
+  end
+
   describe 'when calling the getters and setters' do
     [:disk, :mirror, :raidz, :log, :spare].each do |field|
       describe "when calling #{field}" do
@@ -234,6 +270,19 @@
         provider.create
       end
     end
+
+    describe 'when creating a zpool with options' do
+      before(:each) do
+        resource[:disk] = 'disk1'
+      end
+      [:ashift, :autoexpand, :failmode].each do |field|
+        it "should include field #{field}" do
+          resource[field] = field
+          expect(provider).to receive(:zpool).with(:create, '-o', "#{field}=#{field}", name, 'disk1')
+          provider.create
+        end
+      end
+    end
   end
 
   context '#delete' do

spec/unit/type/zpool_spec.rb

@@ -2,7 +2,7 @@
 
 describe 'zpool' do
   describe Puppet::Type.type(:zpool) do
-    properties = [:ensure, :disk, :mirror, :raidz, :spare, :log]
+    properties = [:ensure, :disk, :mirror, :raidz, :spare, :log, :autoexpand, :failmode, :ashift]
     properties.each do |property|
       it "should have a #{property} property" do
         expect(described_class.attrclass(property).ancestors).to be_include(Puppet::Property)