lib/facter/resolvers/xen.rb in facter-4.0.35 vs lib/facter/resolvers/xen.rb in facter-4.0.36

@@ -5,10 +5,12 @@
     class Xen < BaseResolver
       @semaphore = Mutex.new
       @fact_list ||= {}
 
       XEN_PATH = '/proc/xen/capabilities'
+      XEN_TOOLSTACK = '/usr/lib/xen-common/bin/xen-toolstack'
+      XEN_COMMANDS = ['/usr/sbin/xl', '/usr/sbin/xm'].freeze
 
       class << self
         private
 
         def post_resolve(fact_name)
@@ -16,10 +18,11 @@
         end
 
         def detect_xen(fact_name)
           @fact_list[:vm] = detect_xen_type
           @fact_list[:privileged] = privileged?(@fact_list[:vm])
+          @fact_list[:domains] = detect_domains
 
           @fact_list[fact_name]
         end
 
         def detect_xen_type
@@ -30,9 +33,34 @@
         end
 
         def privileged?(xen_type)
           content = Util::FileHelper.safe_read(XEN_PATH, nil)
           content&.strip == 'control_d' || xen_type == 'xen0'
+        end
+
+        def detect_domains
+          domains = []
+          xen_command = find_command
+          return unless xen_command
+
+          output = Facter::Core::Execution.execute("#{xen_command} list", logger: log)
+          return if output.empty?
+
+          output.each_line do |line|
+            next if line =~ /Domain-0|Name/
+
+            domain = line.match(/^([^\s]*)\s/)
+            domain = domain&.captures&.first
+            domains << domain if domain
+          end
+
+          domains
+        end
+
+        def find_command
+          return XEN_TOOLSTACK if File.exist?(XEN_TOOLSTACK)
+
+          XEN_COMMANDS.each { |command| return command if File.exist?(command) }
         end
       end
     end
   end
 end