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+::
+
+   Copyright 2019 Nokia
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+
+==============================
+Host CLI
+==============================
+
+.. raw:: pdf
+
+   PageBreak
+
+.. sectnum::
+
+.. contents::
+
+.. raw:: pdf
+
+   PageBreak
+
+Introduction
+============
+
+Cloud infratructure is openstack based, openstack services already utilize 
+a common framework for openstack own commands. These commands are accessed via 
+the **openstack** command. The syntax used in this command is the following:
+
+::
+
+  openstack <openstack domain> <operation> [<options>]
+
+
+Below is an example of some **openstack** commands.
+
+::
+
+  openstack server list
+
+  openstack server show <server-name>
+
+  openstack network list
+
+  ...
+
+The **openstack** command is implemented ontop of the python **cliff** framework.
+
+**cliff** framework supports the following:
+
+- structure the commands tokens.
+
+- map command tokens to command handlers.
+
+- parse command arguments.
+
+- format commands output.
+
+- bash auto-completion of commands.
+
+A well integrated platform is expected to provide a common way to access the 
+interfaces provided by the platform. As such cloud infrastructure utilizes 
+the same **cliff** framework to implement the infrastrcture own middleware CLIs. 
+
+The infrastrcutre CLIs can be accessed via the **hostcli** command. 
+
+The syntax used in this command is the following:
+
+::
+
+ hostcli <middleware domain> <operation> [<options>]
+
+Below is an example of some **hostcli** commands.
+
+::
+
+ hostcli has show nodes
+
+ hostcli has show services --node <node-name>
+
+ hostcli motd show
+
+ hostcli motd set --motd <message of the day text>
+
+ ...
+
+In addition to providing the common look and feel for the end user, the 
+*hostcli* takes care of authorizing with keystone and provide a token
+for authentication usage
+
+The following diagram describes the highlevel design for **hostcli** CLI 
+frameowk.
+
+.. image:: docs/hostcli.png
+
+
+When using yarf restful framework to implement the backend for middleware
+the frame provides a RestRequest class to make the authentication transperant
+to a module.
+
+Example of using this request:
+
+.. code:: python
+
+    def take_action(self, parsed_args):
+        req = self.app.client_manager.resthandler
+        ret = req.get("has/v1/cluster", decode_json=True)
+        status = ret['data']
+        columns = ('admin-state',
+                   'running-state',
+                   'role'
+                  )
+        data = (status['admin-state'],
+                status['running-state'],
+                status['role']
+                )
+        return (columns, data)
+
+The beef is ot get the resthandler from client_manager that is defined in the app.
+This will return the object RestRequest for you that has the HTTP operations predefined.
+The only thing needed is the path of the url. The actual address should not be defined, 
+since it's extracted from the keystone session from the endpoints.