Merge "Have task/flow logging go to a separate log file"

etc/cinder/logging_sample.conf

@@ -1,8 +1,8 @@
 [loggers]
-keys = root, cinder
+keys = root, cinder, taskflow, cinder_flow_utils
 
 [handlers]
-keys = stderr, stdout, watchedfile, syslog, null
+keys = stderr, stdout, watchedfile, syslog, tasks, null
 
 [formatters]
 keys = context, default
@@ -16,6 +16,18 @@ level = INFO
 handlers = stderr
 qualname = cinder
 
+# Both of these are used for tracking what cinder and taskflow is doing with
+# regard to flows and tasks (and the activity there-in).
+[logger_cinder_flow_utils]
+level = INFO
+handlers = tasks,stderr
+qualname = cinder.flow_utils
+
+[logger_taskflow]
+level = INFO
+handlers = tasks
+qualname = taskflow
+
 [logger_amqplib]
 level = WARNING
 handlers = stderr
@@ -59,6 +71,11 @@ class = handlers.WatchedFileHandler
 args = ('cinder.log',)
 formatter = context
 
+[handler_tasks]
+class = handlers.WatchedFileHandler
+args = ('tasks.log',)
+formatter = context
+
 [handler_syslog]
 class = handlers.SysLogHandler
 args = ('/dev/log', handlers.SysLogHandler.LOG_USER)