add doc for alias

.gitignore

@@ -0,0 +1,2 @@
+# vscode
+*.vscode

docs/source/index.rst

@@ -15,6 +15,7 @@ Vearch System Introduction
    use_op/op_cluster.rst
    use_op/op_db.rst
    use_op/op_space.rst
+   use_op/op_alias.rst
    use_op/op_doc.rst
 
 .. toctree::

docs/source/use_op/op_alias.rst

@@ -0,0 +1,34 @@
+Alias operation
+==================================
+
+The alias can be a short string to facilitate identification and access of the corresponding space. 
+
+Usually the alias will replace the name of the Space to facilitate business switching and other scenarios.
+
+http://master_server represents the master service, $db_name is the name of the created database, $space_name is the name of the created space
+
+Create space alias
+--------------------------------
+::
+ 
+   curl -XPOST http://master_server/alias/$alias_name/dbs/$db_name/spaces/$space_name
+
+
+Update space alias
+--------------------------------
+::
+ 
+   curl -XPUT http://master_server/alias/$alias_name/dbs/$db_name/spaces/$space_name
+
+
+Get alias details
+--------------------------------
+::
+ 
+   curl -XGET http://master_server/alias/$alias_name
+
+Delete space alias
+--------------------------------
+::
+ 
+   curl -XDELETE http://master_server/alias/$alias_name