Add Hostname dimension.

Issue awslabs#43

src/cloudwatch/modules/dimensionhandler.py

@@ -15,6 +15,7 @@ def __init__(self, config_helper, vl):
         self.vl = vl
         self.dimension_handlers["InstanceId"] = Dimension_InstanceId(self.config, self.vl)
         self.dimension_handlers["PluginInstance"] = Dimension_PluginInstance(self.config, self.vl)
+        self.dimension_handlers["Hostname"] = Dimension_Hostname(self.config, self.vl)
         for h in self.dimension_handlers:
             self.dimension_handlers[h].register_plugin()
 

src/cloudwatch/modules/dimensionplugins/generic_dimensions.py

@@ -2,14 +2,16 @@
 This is the file containing generic dimension plugin classes
 """
 
+import os
 from . import DimensionPlugin
 
-def dimension_get_instance_id(dimension, args):
-    dimension[args['name']] = args['value']
-
 """
 This InstanceId Dimension coming from configured host instance
 """
+
+def dimension_get_instance_id(dimension, args):
+    dimension[args['name']] = args['value']
+
 class Dimension_InstanceId(DimensionPlugin):
     def register_plugin(self):
         self.func = dimension_get_instance_id
@@ -19,12 +21,13 @@ def register_plugin(self):
         }
 
 
-def dimension_get_plugin_instance(dimension, args):
-    dimension[args['name']] = args['value']
-
 """
 This PluginInstance Dimension coming from collectd value plugin instance
 """
+
+def dimension_get_plugin_instance(dimension, args):
+    dimension[args['name']] = args['value']
+
 class Dimension_PluginInstance(DimensionPlugin):
     def register_plugin(self):
         self.func = dimension_get_plugin_instance
@@ -33,3 +36,18 @@ def register_plugin(self):
             'value': self.vl.plugin_instance
         }
 
+
+"""
+Hostname Dimension report the hostname value
+"""
+
+def dimension_get_hostname(dimension, args):
+    dimension[args['name']] = args['value']
+
+class Dimension_Hostname(DimensionPlugin):
+    def register_plugin(self):
+        self.func = dimension_get_hostname
+        self.args = {
+            'name': "Hostname",
+            'value': os.uname()[1]
+        }