mirror of
https://gitlab.com/libvirt/libvirt.git
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* docs/*: start cleanup/revamp of architecture docs
daniel
This commit is contained in:
Daniel Veillard
parent
8b8f4c5cbc
commit
89dd05cc6f
@ -1,3 +1,7 @@
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Thu Apr 2 14:00:14 CEST 2009 Daniel Veillard <veillard@redhat.com>
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* docs/*: start cleanup/revamp of architecture docs
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Thu Apr 2 11:52:59 CEST 2009 Daniel Veillard <veillard@redhat.com>
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* po/*: updated brazilian, spanish, polish and simplified chinese
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@ -47,6 +47,10 @@
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<div>
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<a title="Overview of the logical subsystems in the libvirt API" class="active" href="intro.html">Architecture</a>
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<ul class="l2"><li>
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<div>
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<a title="Terminology and goals of libvirt API" class="inactive" href="goals.html">Goals</a>
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||||
</div>
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||||
</li><li>
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||||
<div>
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||||
<span class="active">Domains</span>
|
||||
</div>
|
||||
|
||||
@ -47,6 +47,10 @@
|
||||
<div>
|
||||
<a title="Overview of the logical subsystems in the libvirt API" class="active" href="intro.html">Architecture</a>
|
||||
<ul class="l2"><li>
|
||||
<div>
|
||||
<a title="Terminology and goals of libvirt API" class="inactive" href="goals.html">Goals</a>
|
||||
</div>
|
||||
</li><li>
|
||||
<div>
|
||||
<a title="Managing virtual machines" class="inactive" href="archdomain.html">Domains</a>
|
||||
</div>
|
||||
|
||||
@ -47,6 +47,10 @@
|
||||
<div>
|
||||
<a title="Overview of the logical subsystems in the libvirt API" class="active" href="intro.html">Architecture</a>
|
||||
<ul class="l2"><li>
|
||||
<div>
|
||||
<a title="Terminology and goals of libvirt API" class="inactive" href="goals.html">Goals</a>
|
||||
</div>
|
||||
</li><li>
|
||||
<div>
|
||||
<a title="Managing virtual machines" class="inactive" href="archdomain.html">Domains</a>
|
||||
</div>
|
||||
|
||||
@ -47,6 +47,10 @@
|
||||
<div>
|
||||
<a title="Overview of the logical subsystems in the libvirt API" class="active" href="intro.html">Architecture</a>
|
||||
<ul class="l2"><li>
|
||||
<div>
|
||||
<a title="Terminology and goals of libvirt API" class="inactive" href="goals.html">Goals</a>
|
||||
</div>
|
||||
</li><li>
|
||||
<div>
|
||||
<a title="Managing virtual machines" class="inactive" href="archdomain.html">Domains</a>
|
||||
</div>
|
||||
|
||||
157
docs/goals.html
Normal file
157
docs/goals.html
Normal file
@ -0,0 +1,157 @@
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<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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||||
<html xmlns="http://www.w3.org/1999/xhtml">
|
||||
<!--
|
||||
This file is autogenerated from goals.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: Terminology and goals</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="active" href="intro.html">Architecture</a>
|
||||
<ul class="l2"><li>
|
||||
<div>
|
||||
<span class="active">Goals</span>
|
||||
</div>
|
||||
</li><li>
|
||||
<div>
|
||||
<a title="Managing virtual machines" class="inactive" href="archdomain.html">Domains</a>
|
||||
</div>
|
||||
</li><li>
|
||||
<div>
|
||||
<a title="Providing isolated networks and NAT based network connectivity" class="inactive" href="archnetwork.html">Network</a>
|
||||
</div>
|
||||
</li><li>
|
||||
<div>
|
||||
<a title="Managing storage pools and volumes" class="inactive" href="archstorage.html">Storage</a>
|
||||
</div>
|
||||
</li><li>
|
||||
<div>
|
||||
<a title="Enumerating host node devices" class="inactive" href="archnode.html">Node Devices</a>
|
||||
</div>
|
||||
</li></ul>
|
||||
</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="inactive" href="drivers.html">Drivers</a>
|
||||
</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>Terminology and goals</h1>
|
||||
<p>To avoid ambiguity about the terms used, here are the definitions
|
||||
for some of the specific concepts used in libvirt documentation:</p>
|
||||
<ul><li>a <strong>node</strong> is a single physical machine</li><li>an <strong>hypervisor</strong> is a layer of software allowing to
|
||||
virtualize a node in a set of virtual machines with possibly different
|
||||
configurations than the node itself</li><li>a <strong>domain</strong> is an instance of an operating system
|
||||
(or subsystem in the case of container virtualization) running on a
|
||||
virtualized machine provided by the hypervisor</li></ul>
|
||||
<p class="image">
|
||||
<img alt="Hypervisor and domains running on a node" src="node.gif" /></p>
|
||||
<p>Now we can define the goal of libvirt: to provide a common generic
|
||||
and stable layer to securely manage domains on a node. The node may be
|
||||
distant and libvirt should provide all APIs needed to provision, create,
|
||||
modify, monitor, control, migrate and stop the domains, within the limits
|
||||
of the support of the hypervisor for those operations. Multiple mode may
|
||||
be accessed with libvirt simultaneously but the APIs are limited to
|
||||
single node operations.</p>
|
||||
<p>This implies the following sub-goals:</p>
|
||||
<ul><li>the API should not be targeted to a single virtualization environment
|
||||
which also means that some very specific capabilities which are not generic
|
||||
enough may not be provided as libvirt APIs</li><li>the API should allow to do efficiently and cleanly all the operations
|
||||
needed to manage domains on a node</li><li>the API will not try to provide high level virtualization policies or
|
||||
multi-nodes management features like load balancing, but the API should be
|
||||
sufficient so they can be implemented on top of libvirt</li><li>stability of the API is a big concern, libvirt should isolate
|
||||
applications from the frequent changes expected at the lower level of the
|
||||
virtualization framework</li><li>the node being managed may be on a different physical machine than
|
||||
the management program using libvirt, to this effect libvirt supports
|
||||
remote access, but should only do so by using secure protocols.</li><li>libvirt will provide APIs to enumerate, monitor and use the resources
|
||||
available on the managed node, including CPUs, memory, storage, networking,
|
||||
and NUMA partitions.</li></ul>
|
||||
<p>So libvirt is intended to be a building block for higher level
|
||||
management tools and for applications focusing on virtualization of a
|
||||
single node (the only exception being domain migration between node
|
||||
capabilities which involves more than one node).</p>
|
||||
</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>
|
||||
51
docs/goals.html.in
Normal file
51
docs/goals.html.in
Normal file
@ -0,0 +1,51 @@
|
||||
<?xml version="1.0"?>
|
||||
<html>
|
||||
<body>
|
||||
<h1>Terminology and goals</h1>
|
||||
<p>To avoid ambiguity about the terms used, here are the definitions
|
||||
for some of the specific concepts used in libvirt documentation:</p>
|
||||
<ul>
|
||||
<li>a <strong>node</strong> is a single physical machine</li>
|
||||
<li>an <strong>hypervisor</strong> is a layer of software allowing to
|
||||
virtualize a node in a set of virtual machines with possibly different
|
||||
configurations than the node itself</li>
|
||||
<li>a <strong>domain</strong> is an instance of an operating system
|
||||
(or subsystem in the case of container virtualization) running on a
|
||||
virtualized machine provided by the hypervisor</li>
|
||||
</ul>
|
||||
<p class="image">
|
||||
<img alt="Hypervisor and domains running on a node" src="node.gif"/>
|
||||
</p>
|
||||
<p>Now we can define the goal of libvirt: to provide a common generic
|
||||
and stable layer to securely manage domains on a node. The node may be
|
||||
distant and libvirt should provide all APIs needed to provision, create,
|
||||
modify, monitor, control, migrate and stop the domains, within the limits
|
||||
of the support of the hypervisor for those operations. Multiple mode may
|
||||
be accessed with libvirt simultaneously but the APIs are limited to
|
||||
single node operations.</p>
|
||||
<p>This implies the following sub-goals:</p>
|
||||
<ul>
|
||||
<li>the API should not be targeted to a single virtualization environment
|
||||
which also means that some very specific capabilities which are not generic
|
||||
enough may not be provided as libvirt APIs</li>
|
||||
<li>the API should allow to do efficiently and cleanly all the operations
|
||||
needed to manage domains on a node</li>
|
||||
<li>the API will not try to provide high level virtualization policies or
|
||||
multi-nodes management features like load balancing, but the API should be
|
||||
sufficient so they can be implemented on top of libvirt</li>
|
||||
<li>stability of the API is a big concern, libvirt should isolate
|
||||
applications from the frequent changes expected at the lower level of the
|
||||
virtualization framework</li>
|
||||
<li>the node being managed may be on a different physical machine than
|
||||
the management program using libvirt, to this effect libvirt supports
|
||||
remote access, but should only do so by using secure protocols.</li>
|
||||
<li>libvirt will provide APIs to enumerate, monitor and use the resources
|
||||
available on the managed node, including CPUs, memory, storage, networking,
|
||||
and NUMA partitions.</li>
|
||||
</ul>
|
||||
<p>So libvirt is intended to be a building block for higher level
|
||||
management tools and for applications focusing on virtualization of a
|
||||
single node (the only exception being domain migration between node
|
||||
capabilities which involves more than one node).</p>
|
||||
</body>
|
||||
</html>
|
||||
@ -47,6 +47,10 @@
|
||||
<div>
|
||||
<span class="active">Architecture</span>
|
||||
<ul class="l2"><li>
|
||||
<div>
|
||||
<a title="Terminology and goals of libvirt API" class="inactive" href="goals.html">Goals</a>
|
||||
</div>
|
||||
</li><li>
|
||||
<div>
|
||||
<a title="Managing virtual machines" class="inactive" href="archdomain.html">Domains</a>
|
||||
</div>
|
||||
@ -110,36 +114,12 @@
|
||||
</div>
|
||||
<div id="content">
|
||||
<h1>Architecture</h1>
|
||||
<p>Libvirt is a C toolkit to interact with the virtualization capabilities of
|
||||
recent versions of Linux (and other OSes), but libvirt won't try to provide
|
||||
all possible interfaces for interacting with the virtualization features.</p>
|
||||
<p>To avoid ambiguity about the terms used here here are the definitions for
|
||||
some of the specific concepts used in libvirt documentation:</p>
|
||||
<ul><li>a <strong>node</strong> is a single physical machine</li><li>an <strong>hypervisor</strong> is a layer of software allowing to
|
||||
virtualize a node in a set of virtual machines with possibly different
|
||||
configurations than the node itself</li><li>a <strong>domain</strong> is an instance of an operating system running
|
||||
on a virtualized machine provided by the hypervisor</li></ul>
|
||||
<p class="image">
|
||||
<img alt="Hypervisor and domains running on a node" src="node.gif" /></p>
|
||||
<p>Now we can define the goal of libvirt: to provide the lowest possible
|
||||
generic and stable layer to manage domains on a node.</p>
|
||||
<p>This implies the following:</p>
|
||||
<ul><li>the API should not be targeted to a single virtualization environment
|
||||
though Xen is the current default, which also means that some very
|
||||
specific capabilities which are not generic enough may not be provided as
|
||||
libvirt APIs</li><li>the API should allow to do efficiently and cleanly all the operations
|
||||
needed to manage domains on a node</li><li>the API will not try to provide high level multi-nodes management
|
||||
features like load balancing, though they could be implemented on top of
|
||||
libvirt</li><li>stability of the API is a big concern, libvirt should isolate
|
||||
applications from the frequent changes expected at the lower level of the
|
||||
virtualization framework</li></ul>
|
||||
<p>So libvirt should be a building block for higher level management tools
|
||||
and for applications focusing on virtualization of a single node (the only
|
||||
exception being domain migration between node capabilities which may need to
|
||||
be added at the libvirt level). Where possible libvirt should be extendable
|
||||
to be able to provide the same API for remote nodes, however this is not the
|
||||
case at the moment, the code currently handle only local node accesses
|
||||
(extension for remote access support is being worked on, see <a href="bugs.html">the mailing list</a> discussions about it).</p>
|
||||
<p>Libvirt is a C toolkit manage the virtualization capabilities
|
||||
of recent versions of Linux (and other OSes).</p>
|
||||
<p>To avoid ambiguity about the goals, terms and specific concepts used
|
||||
in libvirt documentation please see the <a href="goals.html">Goal
|
||||
section</a>.
|
||||
</p>
|
||||
</div>
|
||||
</div>
|
||||
<div id="footer">
|
||||
|
||||
@ -2,45 +2,11 @@
|
||||
<html>
|
||||
<body>
|
||||
<h1>Architecture</h1>
|
||||
<p>Libvirt is a C toolkit to interact with the virtualization capabilities of
|
||||
recent versions of Linux (and other OSes), but libvirt won't try to provide
|
||||
all possible interfaces for interacting with the virtualization features.</p>
|
||||
<p>To avoid ambiguity about the terms used here here are the definitions for
|
||||
some of the specific concepts used in libvirt documentation:</p>
|
||||
<ul>
|
||||
<li>a <strong>node</strong> is a single physical machine</li>
|
||||
<li>an <strong>hypervisor</strong> is a layer of software allowing to
|
||||
virtualize a node in a set of virtual machines with possibly different
|
||||
configurations than the node itself</li>
|
||||
<li>a <strong>domain</strong> is an instance of an operating system running
|
||||
on a virtualized machine provided by the hypervisor</li>
|
||||
</ul>
|
||||
<p class="image">
|
||||
<img alt="Hypervisor and domains running on a node" src="node.gif"/>
|
||||
<p>Libvirt is a C toolkit manage the virtualization capabilities
|
||||
of recent versions of Linux (and other OSes).</p>
|
||||
<p>To avoid ambiguity about the goals, terms and specific concepts used
|
||||
in libvirt documentation please see the <a href="goals.html">Goal
|
||||
section</a>.
|
||||
</p>
|
||||
<p>Now we can define the goal of libvirt: to provide the lowest possible
|
||||
generic and stable layer to manage domains on a node.</p>
|
||||
<p>This implies the following:</p>
|
||||
<ul>
|
||||
<li>the API should not be targeted to a single virtualization environment
|
||||
though Xen is the current default, which also means that some very
|
||||
specific capabilities which are not generic enough may not be provided as
|
||||
libvirt APIs</li>
|
||||
<li>the API should allow to do efficiently and cleanly all the operations
|
||||
needed to manage domains on a node</li>
|
||||
<li>the API will not try to provide high level multi-nodes management
|
||||
features like load balancing, though they could be implemented on top of
|
||||
libvirt</li>
|
||||
<li>stability of the API is a big concern, libvirt should isolate
|
||||
applications from the frequent changes expected at the lower level of the
|
||||
virtualization framework</li>
|
||||
</ul>
|
||||
<p>So libvirt should be a building block for higher level management tools
|
||||
and for applications focusing on virtualization of a single node (the only
|
||||
exception being domain migration between node capabilities which may need to
|
||||
be added at the libvirt level). Where possible libvirt should be extendable
|
||||
to be able to provide the same API for remote nodes, however this is not the
|
||||
case at the moment, the code currently handle only local node accesses
|
||||
(extension for remote access support is being worked on, see <a href="bugs.html">the mailing list</a> discussions about it).</p>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
@ -106,6 +106,9 @@
|
||||
<a href="intro.html">Architecture</a>
|
||||
<span>Overview of the logical subsystems in the libvirt API</span>
|
||||
<ul><li>
|
||||
<a href="goals.html">Goals</a>
|
||||
<span>Terminology and goals of libvirt API</span>
|
||||
</li><li>
|
||||
<a href="archdomain.html">Domains</a>
|
||||
<span>Managing virtual machines</span>
|
||||
</li><li>
|
||||
|
||||
@ -56,6 +56,10 @@
|
||||
<a href="intro.html">Architecture</a>
|
||||
<span>Overview of the logical subsystems in the libvirt API</span>
|
||||
<ul>
|
||||
<li>
|
||||
<a href="goals.html">Goals</a>
|
||||
<span>Terminology and goals of libvirt API</span>
|
||||
</li>
|
||||
<li>
|
||||
<a href="archdomain.html">Domains</a>
|
||||
<span>Managing virtual machines</span>
|
||||
|
||||
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Block a user