Merge pull request #290 from you-n-g/online_srv

init version of online serving and rolling

docs/component/online.rst

@@ -0,0 +1,46 @@
+.. _online:
+
+=================================
+Online Serving
+=================================
+.. currentmodule:: qlib
+
+
+Introduction
+=============
+
+.. image:: ../_static/img/online_serving.png
+    :align: center
+
+
+In addition to backtesting, one way to test a model is effective is to make predictions in real market conditions or even do real trading based on those predictions.
+``Online Serving`` is a set of modules for online models using the latest data,
+which including `Online Manager <#Online Manager>`_, `Online Strategy <#Online Strategy>`_, `Online Tool <#Online Tool>`_, `Updater <#Updater>`_. 
+
+`Here <https://github.com/microsoft/qlib/tree/main/examples/online_srv>`_ are several examples for reference, which demonstrate different features of ``Online Serving``.
+If you have many models or `task` needs to be managed, please consider `Task Management <../advanced/task_management.html>`_.
+The `examples <https://github.com/microsoft/qlib/tree/main/examples/online_srv>`_ are based on some components in `Task Management <../advanced/task_management.html>`_ such as ``TrainerRM`` or ``Collector``.
+
+Online Manager
+=============
+
+.. automodule:: qlib.workflow.online.manager
+    :members:
+
+Online Strategy
+=============
+
+.. automodule:: qlib.workflow.online.strategy
+    :members:
+
+Online Tool
+=============
+
+.. automodule:: qlib.workflow.online.utils
+    :members:
+
+Updater
+=============
+
+.. automodule:: qlib.workflow.online.update
+    :members: