libvirt/docs/FAQ.html
Daniel Veillard d1b1545168 * docs/*: updated the format section, augmented Networking with
description provided by Daniel Berrange
* po/*: regenerated
Daniel
2007-03-16 18:33:53 +00:00

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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" /><link rel="stylesheet" type="text/css" href="libvirt.css" /><link rel="SHORTCUT ICON" href="/32favicon.png" /><title>FAQ</title></head><body><div id="container"><div id="intro"><div id="adjustments"></div><div id="pageHeader"></div><div id="content2"><h1 class="style1">FAQ</h1><p>Table of Contents:</p><ul><li><a href="FAQ.html#License">License(s)</a></li>
<li><a href="FAQ.html#Installati">Installation</a></li>
<li><a href="FAQ.html#Compilatio">Compilation</a></li>
<li><a href="FAQ.html#Developer">Developer corner</a></li>
</ul><h3><a name="License" id="License">License</a>(s)</h3><ol><li><em>Licensing Terms for libvirt</em>
<p>libvirt is released under the <a href="http://www.opensource.org/licenses/lgpl-license.html">GNU
LesserGeneral Public License</a>, see the file COPYING.LIB in the
distributionfor the precise wording. The only library that libvirt
depends upon isthe Xen store access library which is also licenced under
the LGPL.</p>
</li>
<li><em>Can I embed libvirt in a proprietary application ?</em>
<p>Yes. The LGPL allows you to embed libvirt into a
proprietaryapplication. It would be graceful to send-back bug fixes and
improvementsas patches for possible incorporation in the main development
tree. Itwill decrease your maintainance costs anyway if you do so.</p>
</li>
</ol><h3><a name="Installati" id="Installati">Installation</a></h3><ol><li><em>Where can I get libvirt</em>?
<p>The original distribution comes from <a href="ftp://libvirt.org/libvirt/">ftp://libvirt.org/libvirt/</a>.</p>
</li>
<li><em>I can't install the libvirt/libvirt-devel RPM packages due tofailed
dependencies</em>
<p>The most generic solution is to re-fetch the latest src.rpm ,
andrebuild it locally with</p>
<p><code>rpm --rebuild libvirt-xxx.src.rpm</code>.</p>
<p>If everything goes well it will generate two binary rpm packages
(oneproviding the shared libs and virsh, and the other one, the
-develpackage, providing includes, static libraries and scripts needed to
buildapplications with libvirt that you can install locally.</p>
<p>One can also rebuild the RPMs from a tarball:</p>
<p><code>rpmbuild -ta libdir-xxx.tar.gz</code></p>
<p>Or from a configured tree with:</p>
<p><code>make rpm</code></p>
</li>
<li><em>Failure to use the API for non-root users</em>
<p>Large parts of the API may only be accessible with root
priviledges,however the read only access to the xenstore data doesnot
have to beforbidden to user, at least for monitoring purposes. If "virsh
dominfo"fails to run as an user, change the mode of the xenstore
read-only socketwith:</p>
<p><code>chmod 666 /var/run/xenstored/socket_ro</code></p>
<p>and also make sure that the Xen Daemon is running correctly with
localHTTP server enabled, this is defined
in<code>/etc/xen/xend-config.sxp</code>which need the following line to
beenabled:</p>
<p><code>(xend-http-server yes)</code></p>
<p>If needed restart the xend daemon after making the change with
thefollowing command run as root:</p>
<p><code>service xend restart</code></p>
</li>
</ol><h3><a name="Compilatio" id="Compilatio">Compilation</a></h3><ol><li><em>What is the process to compile libvirt ?</em>
<p>As most UNIX libraries libvirt follows the "standard":</p>
<p><code>gunzip -c libvirt-xxx.tar.gz | tar xvf -</code></p>
<p><code>cd libvirt-xxxx</code></p>
<p><code>./configure --help</code></p>
<p>to see the options, then the compilation/installation proper</p>
<p><code>./configure [possible options]</code></p>
<p><code>make</code></p>
<p><code>make install</code></p>
<p>At that point you may have to rerun ldconfig or a similar utility
toupdate your list of installed shared libs.</p>
</li>
<li><em>What other libraries are needed to compile/install libvirt ?</em>
<p>Libvirt requires libxenstore, which is usually provided by the
xenpackages as well as the public headers to compile against
libxenstore.</p>
</li>
<li><em>I use the CVS version and there is no configure script</em>
<p>The configure script (and other Makefiles) are generated. Use
theautogen.sh script to regenerate the configure script and
Makefiles,like:</p>
<p><code>./autogen.sh --prefix=/usr --disable-shared</code></p>
</li>
</ol><h3><a name="Developer" id="Developer">Developer</a>corner</h3><ol><li><em>Troubles compiling or linking programs using libvirt</em>
<p>To simplify the process of reusing the library, libvirt comes
withpkgconfig support, which can be used directly from autoconf support
orvia the pkg-config command line tool, like:</p>
<p><code>pkg-config libvirt --libs</code></p>
</li>
</ol></div></div><div class="linkList2"><div class="llinks2"><h3 class="links2"><span>main menu</span></h3><ul><li><a href="index.html">Home</a></li><li><a href="news.html">Releases</a></li><li><a href="intro.html">Introduction</a></li><li><a href="architecture.html">libvirt architecture</a></li><li><a href="downloads.html">Downloads</a></li><li><a href="format.html">XML Formats</a></li><li><a href="python.html">Binding for Python</a></li><li><a href="errors.html">Handling of errors</a></li><li><a href="FAQ.html">FAQ</a></li><li><a href="bugs.html">Reporting bugs and getting help</a></li><li><a href="html/index.html">API Menu</a></li><li><a href="examples/index.html">C code examples</a></li><li><a href="ChangeLog.html">Recent Changes</a></li></ul></div><div class="llinks2"><h3 class="links2"><span>related links</span></h3><ul><li><a href="https://www.redhat.com/archives/libvir-list/">Mail archive</a></li><li><a href="https://bugzilla.redhat.com/bugzilla/buglist.cgi?product=Fedora+Core&amp;component=libvirt&amp;bug_status=NEW&amp;bug_status=ASSIGNED&amp;bug_status=REOPENED&amp;bug_status=MODIFIED&amp;short_desc_type=allwordssubstr&amp;short_desc=&amp;long_desc_type=allwordssubstr">Open bugs</a></li><li><a href="http://virt-manager.et.redhat.com/">virt-manager</a></li><li><a href="http://search.cpan.org/~danberr/Sys-Virt-0.1.0/">Perl bindings</a></li><li><a href="http://www.cl.cam.ac.uk/Research/SRG/netos/xen/index.html">Xen project</a></li><li><form action="search.php" enctype="application/x-www-form-urlencoded" method="get"><input name="query" type="text" size="12" value="Search..." /><input name="submit" type="submit" value="Go" /></form></li><li><a href="http://xmlsoft.org/"><img src="Libxml2-Logo-90x34.gif" alt="Made with Libxml2 Logo" /></a></li></ul><p class="credits">Graphics and design by <a href="mail:dfong@redhat.com">Diana Fong</a></p></div></div><div id="bottom"><p class="p1"></p></div></div></body></html>