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+# GUI for the Moon project
+This directory contains all the code for the Moon project
+It is designed to provide a running GUI of the Moon platform instance.
+
+## Usage
+- Prerequist
+  - `sudo apt-get install nodejs nodejs-legacy`
+  - `sudo npm install --global gulp-cli`
+- Install all packages 
+  - `cd  $MOON_HOME/moon_gui`
+  - `sudo npm install`
+- Run the GUI
+  - `gulp webServerDelivery`
+  - Open your web browser
+
+## Configuration
+- build the delivery package: `gulp delivery`
+- launch the Web Server: `gulp webServerDelivery`
+
+## Development
+- during the development it is possible to use following commands: `gulp build`
+- launch a Web Server: `gulp webServer`
+- Gulp webServer will refresh the browser when a file related to the application changed
+- it is possible to change some constants (API endpoints): `$MOON_HOME/moon_gui/static/app/moon.constants.js`
+
+## CORS
+The GUI need to connect itself to Keystone and Moon.
+Opening CORS to the GUI WebServer is required.
+- modify Keystone: `$MOON_HOME/tools/moon_keystone/run.sh`
+- modify Moon: `$MOON_HOME/moon_interface/interface/http_server.py`
+ 
+## Usage
+After authentication, you will see 4 tabs: Project, Models, Policies, PDP:
+
+* *Projects*: configure mapping between Keystone projects and PDP (Policy Decision Point)
+* *Models*: configure templates of policies (for example RBAC or MLS)
+* *Policies*: applied models or instantiated models ; 
+on one policy, you map a authorisation model and set subject, objects and action that will
+rely on that model
+* *PDP*: Policy Decision Point, this is the link between Policies and Keystone Project
+
+In the following paragraphs, we will add a new user in OpenStack and allow her to list 
+all VM on the OpenStack platform.
+
+First, add a new user and a new project in the OpenStack platform:
+
+      openstack user create --password-prompt demo_user
+      openstack project create demo
+      DEMO_USER=$(openstack user list | grep demo_user | cut -d " " -f 2)
+      DEMO_PROJECT=$(openstack project list | grep demo | cut -d " " -f 2)
+      openstack role add --user $DEMO_USER --project $DEMO_PROJECT admin
+      
+You have to add the same user in the Moon interface:
+
+1. go to the `Projects` tab in the Moon interface
+1. go to the line corresponding to the new project and click to the `Map to a PDP` link
+1. select in the combobox the MLS PDP and click `OK`
+1. in the Moon interface, go to the `Policy` tab
+1. go to the line corresponding to the MLS policy and click on the `actions->edit` button
+1. scroll to the `Perimeters` line and click on the `show` link to show the perimeter configuration
+1. go to the `Add a subject` line and click on `Add a new perimeter`
+1. set the name of that subject to `demo_user` (*the name must be strictly identical*)
+1. in the combobox named `Policy list` select the `MLS` policy and click on the `+` button
+1. click on the yellow `Add Perimeter` button
+1. go to the `Assignment` line and click on the `show` button
+1. under the `Add a Assignments Subject` select the MLS policy, 
+the new user (`demo_user`), the category `subject_category_level` 
+1. in the `Select a Data` line, choose the `High` scope and click on the `+` link 
+1. click on the yellow `Create Assignments` button 
+1. if you go to the OpenStack platform, the `demo_user` is now allow to connect 
+to the Nova component (test with `openstack server list` connected with the `demo_user`)
+\ No newline at end of file