mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-12-24 06:35:24 +00:00
205 lines
9.1 KiB
HTML
205 lines
9.1 KiB
HTML
<?xml version="1.0" encoding="ISO-8859-1"?>
|
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
|
|
<html xmlns="http://www.w3.org/1999/xhtml">
|
|
<!--
|
|
This file is autogenerated from drvuml.html.in
|
|
Do not edit this file. Changes will be lost.
|
|
-->
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
|
|
<link rel="stylesheet" type="text/css" href="main.css" />
|
|
<link rel="SHORTCUT ICON" href="32favicon.png" />
|
|
<title>libvirt: User Mode Linux driver</title>
|
|
<meta name="description" content="libvirt, virtualization, virtualization API" />
|
|
</head>
|
|
<body>
|
|
<div id="header">
|
|
<div id="headerLogo"></div>
|
|
<div id="headerSearch">
|
|
<form action="search.php" enctype="application/x-www-form-urlencoded" method="get"><div>
|
|
<input id="query" name="query" type="text" size="12" value="" />
|
|
<input id="submit" name="submit" type="submit" value="Search" />
|
|
</div></form>
|
|
</div>
|
|
</div>
|
|
<div id="body">
|
|
<div id="menu">
|
|
<ul class="l0"><li>
|
|
<div>
|
|
<a title="Front page of the libvirt website" class="inactive" href="index.html">Home</a>
|
|
</div>
|
|
</li><li>
|
|
<div>
|
|
<a title="Details of new features and bugs fixed in each release" class="inactive" href="news.html">News</a>
|
|
</div>
|
|
</li><li>
|
|
<div>
|
|
<a title="Get the latest source releases, binary builds and get access to the source repository" class="inactive" href="downloads.html">Downloads</a>
|
|
</div>
|
|
</li><li>
|
|
<div>
|
|
<a title="Information for users, administrators and developers" class="active" href="docs.html">Documentation</a>
|
|
<ul class="l1"><li>
|
|
<div>
|
|
<a title="Information about deploying and using libvirt" class="inactive" href="deployment.html">Deployment</a>
|
|
</div>
|
|
</li><li>
|
|
<div>
|
|
<a title="Overview of the logical subsystems in the libvirt API" class="inactive" href="intro.html">Architecture</a>
|
|
</div>
|
|
</li><li>
|
|
<div>
|
|
<a title="Description of the XML formats used in libvirt" class="inactive" href="format.html">XML format</a>
|
|
</div>
|
|
</li><li>
|
|
<div>
|
|
<a title="Hypervisor specific driver information" class="active" href="drivers.html">Drivers</a>
|
|
<ul class="l2"><li>
|
|
<div>
|
|
<a title="Driver the Xen hypervisor" class="inactive" href="drvxen.html">Xen</a>
|
|
</div>
|
|
</li><li>
|
|
<div>
|
|
<a title="Driver for QEMU, KQEMU, KVM and Xenner" class="inactive" href="drvqemu.html">QEMU / KVM</a>
|
|
</div>
|
|
</li><li>
|
|
<div>
|
|
<a title="Driver for the Linux native container API" class="inactive" href="drvlxc.html">Linux Container</a>
|
|
</div>
|
|
</li><li>
|
|
<div>
|
|
<a title="Psuedo-driver simulating APIs in memory for test suites" class="inactive" href="drvtest.html">Test</a>
|
|
</div>
|
|
</li><li>
|
|
<div>
|
|
<a title="Driver providing secure remote to the libvirt APIs" class="inactive" href="drvremote.html">Remote</a>
|
|
</div>
|
|
</li><li>
|
|
<div>
|
|
<a title="Driver for the OpenVZ container technology" class="inactive" href="drvopenvz.html">OpenVZ</a>
|
|
</div>
|
|
</li><li>
|
|
<div>
|
|
<span class="active">UML</span>
|
|
</div>
|
|
</li><li>
|
|
<div>
|
|
<a title="Driver for the storage management APIs" class="inactive" href="storage.html">Storage</a>
|
|
</div>
|
|
</li></ul>
|
|
</div>
|
|
</li><li>
|
|
<div>
|
|
<a title="Reference manual for the C public API" class="inactive" href="html/index.html">API reference</a>
|
|
</div>
|
|
</li><li>
|
|
<div>
|
|
<a title="Bindings of the libvirt API for other languages" class="inactive" href="bindings.html">Language bindings</a>
|
|
</div>
|
|
</li></ul>
|
|
</div>
|
|
</li><li>
|
|
<div>
|
|
<a title="User contributed content" class="inactive" href="http://wiki.libvirt.org">Wiki</a>
|
|
</div>
|
|
</li><li>
|
|
<div>
|
|
<a title="Frequently asked questions" class="inactive" href="FAQ.html">FAQ</a>
|
|
</div>
|
|
</li><li>
|
|
<div>
|
|
<a title="How and where to report bugs and request features" class="inactive" href="bugs.html">Bug reports</a>
|
|
</div>
|
|
</li><li>
|
|
<div>
|
|
<a title="How to contact the developers via email and IRC" class="inactive" href="contact.html">Contact</a>
|
|
</div>
|
|
</li><li>
|
|
<div>
|
|
<a title="Miscellaneous links of interest related to libvirt" class="inactive" href="relatedlinks.html">Related Links</a>
|
|
</div>
|
|
</li><li>
|
|
<div>
|
|
<a title="Overview of all content on the website" class="inactive" href="sitemap.html">Sitemap</a>
|
|
</div>
|
|
</li></ul>
|
|
</div>
|
|
<div id="content">
|
|
<h1>User Mode Linux driver</h1>
|
|
<p>
|
|
The UML driver for libvirt allows use and management of paravirtualized
|
|
guests built for User Mode Linux. UML requires no special support in
|
|
the host kernel, so can be used by any user of any linux system, provided
|
|
they have enough free RAM for their guest's needs, though there are
|
|
certain restrictions on network connectivity unless the adminstrator
|
|
has pre-created TAP devices.
|
|
</p>
|
|
<h2>Connections to UML driver</h2>
|
|
<p>
|
|
The libvirt UML driver follows the QEMU driver in providing two
|
|
types of connection. There is one privileged instance per host,
|
|
which runs as root. This is called the "system" instance, and allows
|
|
full use of all host resources. Then, there is a per-user unprivileged
|
|
"session", instance. This has more restricted capabilities, and may
|
|
require the host administrator to setup certain resources ahead of
|
|
time to allow full integration with the network. Example connection
|
|
URIs are
|
|
</p>
|
|
<pre>
|
|
uml:///session (local access to per-user instance)
|
|
uml+unix:///session (local access to per-user instance)
|
|
|
|
uml:///system (local access to system instance)
|
|
uml+unix:///system (local access to system instance)
|
|
uml://example.com/system (remote access, TLS/x509)
|
|
uml+tcp://example.com/system (remote access, SASl/Kerberos)
|
|
uml+ssh://root@example.com/system (remote access, SSH tunnelled)
|
|
</pre>
|
|
<h2>Example XML configuration</h2>
|
|
<p>
|
|
User mode Linux driver only supports directly kernel boot at
|
|
this time. A future driver enhancement may allow a paravirt
|
|
bootloader in a similar style to Xen's pygrub. For now though,
|
|
the UML kernel must be stored on the host and referenced
|
|
explicitly in the "os" element. Since UML is a paravirtualized
|
|
technology, the kernel "type" is set to "uml"
|
|
</p>
|
|
<p>
|
|
There is not yet support for networking in the driver, but
|
|
disks can be specified in the usual libvirt manner. The main
|
|
variation is the target device naming scheme "ubd0", and
|
|
bus type of "uml".
|
|
</p>
|
|
<p>
|
|
Once booted the primary console is connected toa PTY, and
|
|
thus accessible with "virsh console" or equivalent tools
|
|
</p>
|
|
<pre>
|
|
<domain type='uml'>
|
|
<name>demo</name>
|
|
<uuid>b4433fc2-a22e-ffb3-0a3d-9c173b395800</uuid>
|
|
<memory>500000</memory>
|
|
<currentMemory>500000</currentMemory>
|
|
<vcpu>1</vcpu>
|
|
<os>
|
|
<type arch='x86_64'>uml</type>
|
|
<kernel>/home/berrange/linux-uml-2.6.26-x86_64</kernel>
|
|
</os>
|
|
<devices>
|
|
<disk type='file' device='disk'>
|
|
<source file='/home/berrange/FedoraCore6-AMD64-root_fs'/>
|
|
<target dev='ubd0' bus='uml'/>
|
|
</disk>
|
|
<console type='pty'/>
|
|
</devices>
|
|
</domain>
|
|
</pre>
|
|
</div>
|
|
</div>
|
|
<div id="footer">
|
|
<p id="sponsor">
|
|
Sponsored by:<br /><a href="http://et.redhat.com/"><img src="et.png" alt="Project sponsored by Red Hat Emerging Technology" /></a></p>
|
|
</div>
|
|
</body>
|
|
</html>
|