metrics-es-node-graphite.rb: drop invalid lines (#3)

bin/metrics-es-node-graphite.rb

@@ -142,7 +142,7 @@ def get_es_resource(resource)
                                    timeout: config[:timeout],
                                    headers: headers)
         end
-    ::JSON.parse(r.get)
+    JSON.parse(r.get)
   rescue Errno::ECONNREFUSED
     warning 'Connection refused'
   rescue RestClient::RequestTimeout
@@ -264,7 +264,9 @@ def run
     node['indices'].each do |type, index|
       index.each do |k, v|
         # #YELLOW
-        unless k =~ /(_time$)/ || v =~ /\d+/
+        if k.end_with? 'is_throttled'
+          metrics["indices.#{type}.#{k}"] = true?(v) ? 1 : 0
+        elsif !(k =~ /(_time$)/ || v =~ /\d+/)
           metrics["indices.#{type}.#{k}"] = v
         end
       end
@@ -306,16 +308,47 @@ def run
     if fs_stats
       node['fs'].each do |fs, fs_value|
         unless fs =~ /(timestamp|data)/
-          fs_value.each do |k, v|
-            metrics["fs.#{fs}.#{k}"] = v
+          metrics_fs = hash_to_dotted_path(fs_value, "#{fs}.")
+          metrics_fs.each do |k, v|
+            metrics["fs.#{k}"] = v
           end
         end
       end
     end
 
     metrics.each do |k, v|
-      output([config[:scheme], k].join('.'), v, timestamp)
+      if v.is_a? Numeric
+        output([config[:scheme], k].join('.'), v, timestamp)
+      end
     end
     ok
   end
 end
+
+def hash_to_dotted_path(hash, path = '')
+  hash.each_with_object({}) do |(k, v), ret|
+    key = path + k.to_s
+    if v.is_a? Hash
+      ret.merge! hash_to_dotted_path(v, "#{key}.")
+    elsif v.is_a? Array
+      v.each do |element|
+        if element['device_name']
+          key2 = "#{key}.#{element['device_name']}"
+          ret.merge! hash_to_dotted_path(element, "#{key2}.")
+        end
+      end
+    else
+      ret[key] = v
+    end
+  end
+end
+
+def true?(obj)
+  if obj.to_s == 'true'
+    true
+  elsif obj.to_s == 'false'
+    false
+  else
+    "#{obj} is not a truthy value, please open an issue with this output so we can fix it"
+  end
+end