fuel-plugin-xenserver/specs/fuel-plugin-xenserver.rst

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Copyright 2015 Citrix Systems
Fuel Plugin for Xenserver
==============================
The XenServer plugin provides the ability to use Xenserver as the
hypervisor for Mirantis OpenStack.
Compatible with Fuel version 9.0.
Problem description
===================
There is currently no supported way for Citrix Xenserver customers to
use Mirantis OpenStack in their environments. XenServer Fuel plugin
aims to provide support for it.
Proposed change
===============
XenServer Fuel plugin that will deliver new features and patches to
Compute/Node nodes as well as the XenServer hosts, customize user
interface as XenServer isn't a built-in hypervisor and reconfigure
OpenStack environment from qemu-based to xenserver-based.
Alternatives
------------
N/A - the aim is to implement a Fuel plugin.
Data model impact
-----------------
None, although a new Release will be installed into the existing model.
REST API impact
---------------
None.
Upgrade impact
--------------
When upgrading the Fuel Master node to Fuel Version higher than 9.0,
plugin compatibility should be checked, and a new plugin installed if
necessary.
Security impact
---------------
None.
Notifications impact
--------------------
None.
Other end user impact
---------------------
Once the plugin is installed, the user can select the XenServer
Release and then configure the access credentials in the Settings tab
of the Fuel Web UI.
Performance Impact
------------------
None.
Plugin impact
-------------
The plugin will:
* Install a customized Release definition (based on Ubuntu) which will
only be usable to install an environment with XenServer
* Connect to XenServer over a new network (an internal management
network)
* Require the network is already set up on the host (to be
documented)
* Set up the network to use DHCP, which will allow access to
XenServer over a fixed link-local IP 169.254.0.1
* Configure Nova to the XenAPI driver and use this interface to
connect
* Configure the Compute VM to provide a NATed interface to Dom0 so
that storage traffic (for example, when downloading the initial
image) which originates in Dom0 can be routed through the Compute VM
as a gateway
Other deployer impact
---------------------
The plugin requries the Compute nodes to be created on the XenServer
hosts as XenServer's Nova plugin requires access to the virtual disks
as they are being created.
Developer impact
----------------
None.
Infrastructure impact
---------------------
None.
Implementation
==============
Assignee(s)
-----------
Primary assignee:
Huan Xie <huan.xie@citrix.com> (developer)
Other contributors:
Bob Ball <bob.ball@citrix.com> (developer, reviewer)
Jianghua Wang <jianghua.wang@citrix.com> (developer)
John Hua <john.hua@citrix.com> (developer)
Work Items
----------
* Upgrade the XenServer Fuel 8.0 plugin to work with Fuel 9.0.
* Test XenServer plugin.
* Create the documentation.
Dependencies
============
* Fuel 9.0
Testing
=======
* Prepare a test plan.
* Test the plugin according to the test plan.
Documentation Impact
====================
* Create the following documentation:
* User Guide.
* Test Plan.
* Test Report.
References
==========
* Citrix XenServer official documentation: http://docs.vmd.citrix.com/XenServer
* What is Xen? by Xen.org: http://xen.org/files/Marketing/WhatisXen.pdf
* Xen Hypervisor project: http://www.xenproject.org/developers/teams/hypervisor.html
* Xapi project: http://www.xenproject.org/developers/teams/xapi.html
* Further XenServer and OpenStack information: http://wiki.openstack.org/XenServer