(FACT-2776) Fix Linux partitions fact

.rubocop.yml

@@ -82,6 +82,7 @@ Metrics/CyclomaticComplexity:
 
 Metrics/ClassLength:
   Exclude:
+    - 'lib/facter/resolvers/partitions.rb'
     - 'lib/facter/custom_facts/util/fact.rb'
     - 'lib/facter/resolvers/windows/networking_resolver.rb'
     - 'lib/facter/custom_facts/util/collection.rb'

lib/facter/resolvers/partitions.rb

@@ -66,10 +66,18 @@ def populate_partitions(partition_name, block_path, backing_file = nil)
           info_hash = { size_bytes: size_bytes,
                         size: Facter::FactsUtils::UnitConverter.bytes_to_human_readable(size_bytes),
                         backing_file: backing_file }
-          info_hash.merge!(populate_from_blkid(partition_name))
+          info_hash.merge!(populate_from_syscalls(partition_name))
           @fact_list[:partitions][partition_name] = info_hash.reject { |_key, value| value.nil? }
         end
 
+        def populate_from_syscalls(partition_name)
+          part_info = populate_from_blkid(partition_name)
+
+          return pupulate_from_lsblk(partition_name) if part_info.empty?
+
+          part_info
+        end
+
         def populate_from_blkid(partition_name)
           return {} unless blkid_command?
 
@@ -92,6 +100,34 @@ def blkid_command?
           @blkid_exists = !output.empty?
         end
 
+        def pupulate_from_lsblk(partition_name)
+          return {} unless lsblk_command?
+
+          @lsblk_content ||= Facter::Core::Execution.execute('lsblk -fp', logger: log)
+
+          part_info = @lsblk_content.match(/#{partition_name}.*/).to_s.split(' ')
+          return {} if part_info.empty?
+
+          result = { filesystem: part_info[1] }
+
+          if part_info.count.eql?(5)
+            result[:label] = part_info[2]
+            result[:uuid] = part_info[3]
+          else
+            result[:uuid] = part_info[2]
+          end
+
+          result
+        end
+
+        def lsblk_command?
+          return @lsblk_exists unless @lsblk_exists.nil?
+
+          output = Facter::Core::Execution.execute('which lsblk', logger: log)
+
+          @lsblk_exists = !output.empty?
+        end
+
         def execute_and_extract_blkid_info
           stdout = Facter::Core::Execution.execute('blkid', logger: log)
           output_hash = Hash[*stdout.split(/^([^:]+):/)[1..-1]]

spec/facter/resolvers/partitions_spec.rb

@@ -48,14 +48,19 @@
                                           .and_return('/usr/bin/blkid')
         allow(Open3).to receive(:capture3).with({ 'LC_ALL' => 'C', 'LANG' => 'C' }, 'blkid')
                                           .and_return(load_fixture('blkid_output').read)
+        allow(Open3).to receive(:capture3).with({ 'LC_ALL' => 'C', 'LANG' => 'C' }, 'which lsblk')
+                                          .and_return('/usr/bin/lsblk')
+        allow(Open3).to receive(:capture3).with({ 'LC_ALL' => 'C', 'LANG' => 'C' }, 'lsblk -fp')
+                                          .and_return(load_fixture('lsblk_output').read)
       end
 
       context 'when device size files are readable' do
         let(:partitions) do
           { '/dev/sda1' => { filesystem: 'ext3', label: '/boot', size: '117.00 KiB',
                              size_bytes: 119_808, uuid: '88077904-4fd4-476f-9af2-0f7a806ca25e',
                              partuuid: '00061fe0-01' },
-            '/dev/sda2' => { size: '98.25 MiB', size_bytes: 103_021_056 } }
+            '/dev/sda2' => { filesystem: 'LVM2_member', size: '98.25 MiB', size_bytes: 103_021_056,
+                             uuid: 'edi7s0-2WVa-ZBan' } }
         end
 
         it 'return partitions fact' do
@@ -67,7 +72,7 @@
         let(:partitions_with_no_sizes) do
           { '/dev/sda1' => { filesystem: 'ext3', label: '/boot', size: '0 bytes',
                              size_bytes: 0, uuid: '88077904-4fd4-476f-9af2-0f7a806ca25e', partuuid: '00061fe0-01' },
-            '/dev/sda2' => { size: '0 bytes', size_bytes: 0 } }
+            '/dev/sda2' => { filesystem: 'LVM2_member', size: '0 bytes', size_bytes: 0, uuid: 'edi7s0-2WVa-ZBan' } }
         end
 
         it 'return partitions fact with 0 sizes' do

spec/fixtures/lsblk_output

@@ -0,0 +1,7 @@
+NAME                      FSTYPE      LABEL UUID                                   MOUNTPOINT
+/dev/sda
+|-/dev/sda1               xfs               5ba36204-050f-4ab6   /boot
+`-/dev/sda2               LVM2_member       edi7s0-2WVa-ZBan
+  |-/dev/mapper/rhel-root xfs               cb455c09-da6b-44e6   /
+  `-/dev/mapper/rhel-swap swap              0fd5997d-eb82-493d   [SWAP]
+/dev/sr0