diff --git a/app/models/fluentd/setting.rb b/app/models/fluentd/setting.rb
index eee298c..9bb4494 100644
--- a/app/models/fluentd/setting.rb
+++ b/app/models/fluentd/setting.rb
@@ -1,107 +1,4 @@
 class Fluentd
   module Setting
-    class InTail
-      include ActiveModel::Model
-      attr_accessor :path, :tag, :format, :regexp, :time_format, :rotate_wait, :pos_file, :read_from_head, :refresh_interval
-
-      validates :path, presence: true
-      validates :tag, presence: true
-      #validates :format, presence: true
-
-      def self.known_formats
-        {
-          :apache2 => [:time_format],
-          :nginx => [:time_format],
-          :syslog => [:time_format],
-          :tsv => [:keys, :time_key],
-          :csv => [:keys, :time_key],
-          :ltsv => [:delimiter, :time_key],
-          :json => [:time_key],
-          :regexp => [:time_format],
-          # TODO: Grok could generate Regexp including \d, \s, etc. fluentd config parser raise error with them for escape sequence check.
-          #       TBD How to handle Grok/Regexp later, just comment out for hide
-          # :grok => [:grok_str],
-        }
-      end
-      attr_accessor *known_formats.values.flatten.compact
-
-      def known_formats
-        self.class.known_formats
-      end
-
-      def guess_format
-        case path
-        when /\.json$/
-          :json
-        when /\.csv$/
-          :csv
-        when /\.tsv$/
-          :tsv
-        when /\.ltsv$/
-          :ltsv
-        when /nginx/
-          :nginx
-        when /apache/
-          :apache2
-        when %r|/var/log|
-          :syslog
-        else
-          :grok
-        end
-      end
-
-      def extra_format_options
-        self.class.known_formats[format.to_sym] || []
-      end
-
-      def format_specific_conf
-        return "" if %w(grok regexp).include?(format)
-
-        indent = " " * 2
-        format_specific_conf = ""
-        extra_format_options.each do |key|
-          format_specific_conf << "#{indent}#{key} #{send(key)}\n"
-        end
-        format_specific_conf
-      end
-
-      def certain_format_line
-        case format
-        when "grok"
-          "format /#{grok.convert_to_regexp(grok_str).source.gsub("/", "\\/")}/ # grok: '#{grok_str}'"
-        when "regexp"
-          "format /#{regexp}/"
-        else
-          "format #{format}"
-        end
-      end
-
-      def grok
-        @grok ||=
-          begin
-            grok = GrokConverter.new
-            grok.load_patterns
-            grok
-          end
-      end
-
-      def to_conf
-        # NOTE: Using strip_heredoc makes more complex for format_specific_conf indent
-        <<-XML.gsub(/^[ ]*\n/m, "")
-<source>
-  type tail
-  path #{path}
-  tag #{tag}
-  #{certain_format_line}
-#{format_specific_conf}
-
-  #{read_from_head.to_i.zero? ? "" : "read_from_head true"}
-  #{pos_file.present? ? "pos_file #{pos_file}" : ""}
-  #{rotate_wait.present? ? "rotate_wait #{rotate_wait}" : ""}
-  #{refresh_interval.present? ? "refresh_interval #{refresh_interval}" : ""}
-</source>
-        XML
-      end
-    end
   end
 end
diff --git a/app/models/fluentd/setting/in_tail.rb b/app/models/fluentd/setting/in_tail.rb
new file mode 100644
index 0000000..eee298c
--- /dev/null
+++ b/app/models/fluentd/setting/in_tail.rb
@@ -0,0 +1,107 @@
+class Fluentd
+  module Setting
+    class InTail
+      include ActiveModel::Model
+      attr_accessor :path, :tag, :format, :regexp, :time_format, :rotate_wait, :pos_file, :read_from_head, :refresh_interval
+
+      validates :path, presence: true
+      validates :tag, presence: true
+      #validates :format, presence: true
+
+      def self.known_formats
+        {
+          :apache2 => [:time_format],
+          :nginx => [:time_format],
+          :syslog => [:time_format],
+          :tsv => [:keys, :time_key],
+          :csv => [:keys, :time_key],
+          :ltsv => [:delimiter, :time_key],
+          :json => [:time_key],
+          :regexp => [:time_format],
+          # TODO: Grok could generate Regexp including \d, \s, etc. fluentd config parser raise error with them for escape sequence check.
+          #       TBD How to handle Grok/Regexp later, just comment out for hide
+          # :grok => [:grok_str],
+        }
+      end
+      attr_accessor *known_formats.values.flatten.compact
+
+      def known_formats
+        self.class.known_formats
+      end
+
+      def guess_format
+        case path
+        when /\.json$/
+          :json
+        when /\.csv$/
+          :csv
+        when /\.tsv$/
+          :tsv
+        when /\.ltsv$/
+          :ltsv
+        when /nginx/
+          :nginx
+        when /apache/
+          :apache2
+        when %r|/var/log|
+          :syslog
+        else
+          :grok
+        end
+      end
+
+      def extra_format_options
+        self.class.known_formats[format.to_sym] || []
+      end
+
+      def format_specific_conf
+        return "" if %w(grok regexp).include?(format)
+
+        indent = " " * 2
+        format_specific_conf = ""
+        extra_format_options.each do |key|
+          format_specific_conf << "#{indent}#{key} #{send(key)}\n"
+        end
+        format_specific_conf
+      end
+
+      def certain_format_line
+        case format
+        when "grok"
+          "format /#{grok.convert_to_regexp(grok_str).source.gsub("/", "\\/")}/ # grok: '#{grok_str}'"
+        when "regexp"
+          "format /#{regexp}/"
+        else
+          "format #{format}"
+        end
+      end
+
+      def grok
+        @grok ||=
+          begin
+            grok = GrokConverter.new
+            grok.load_patterns
+            grok
+          end
+      end
+
+      def to_conf
+        # NOTE: Using strip_heredoc makes more complex for format_specific_conf indent
+        <<-XML.gsub(/^[ ]*\n/m, "")
+<source>
+  type tail
+  path #{path}
+  tag #{tag}
+  #{certain_format_line}
+#{format_specific_conf}
+
+  #{read_from_head.to_i.zero? ? "" : "read_from_head true"}
+  #{pos_file.present? ? "pos_file #{pos_file}" : ""}
+  #{rotate_wait.present? ? "rotate_wait #{rotate_wait}" : ""}
+  #{refresh_interval.present? ? "refresh_interval #{refresh_interval}" : ""}
+</source>
+        XML
+      end
+    end
+  end
+end