Added microsecond precision to fluentd records

Change-Id: I46cbb357ca63b5cadf4e280f3e02ddc5384d3a37

vmtp/fluentd.py

@@ -15,6 +15,7 @@
 from datetime import datetime
 from fluent import sender
 import logging
+import pytz
 
 
 class FluentLogHandler(logging.Handler):
@@ -51,7 +52,9 @@ class FluentLogHandler(logging.Handler):
         data = {
             "runlogdate": self.runlogdate,
             "loglevel": record.levelname,
-            "message": self.formatter.format(record)
+            "message": self.formatter.format(record),
+            "@timestamp": self.__get_timestamp()
+
         }
         self.__update_stats(record.levelno)
         self.sender.emit(None, data)
@@ -64,7 +67,8 @@ class FluentLogHandler(logging.Handler):
             "message": "VMTP run is started",
             "numloglevel": 0,
             "numerrors": 0,
-            "numwarnings": 0
+            "numwarnings": 0,
+            "@timestamp": self.__get_timestamp()
         }
         self.sender.emit(None, data)
 
@@ -77,7 +81,8 @@ class FluentLogHandler(logging.Handler):
                 "message": self.__get_highest_level_desc(),
                 "numloglevel": self.__get_highest_level(),
                 "numerrors": self.__error_counter,
-                "numwarnings": self.__warning_counter
+                "numwarnings": self.__warning_counter,
+                "@timestamp": self.__get_timestamp()
             }
             self.sender.emit(None, data)
 
@@ -102,3 +107,7 @@ class FluentLogHandler(logging.Handler):
             self.__warning_counter += 1
         elif levelno == logging.ERROR:
             self.__error_counter += 1
+
+    def __get_timestamp(self):
+        return datetime.utcnow().replace(tzinfo=pytz.utc).strftime(
+            "%Y-%m-%dT%H:%M:%S.%f%z")