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145 lines
5.2 KiB
XML
145 lines
5.2 KiB
XML
<?xml version="1.0"?>
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<html>
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<body>
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<h1 >FAQ</h1>
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<p>Table of Contents:</p>
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<ul>
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<li>
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<a href="FAQ.html#License">License(s)</a>
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</li>
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<li>
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<a href="FAQ.html#Installati">Installation</a>
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</li>
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<li>
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<a href="FAQ.html#Compilatio">Compilation</a>
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</li>
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<li>
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<a href="FAQ.html#Developer">Developer corner</a>
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</li>
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</ul>
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<h3><a name="License" id="License">License</a>(s)</h3>
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<ol>
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<li>
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<em>Licensing Terms for libvirt</em>
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<p>libvirt is released under the <a href="http://www.opensource.org/licenses/lgpl-license.html">GNU Lesser
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General Public License</a>, see the file COPYING.LIB in the distribution
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for the precise wording. The only library that libvirt depends upon is
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the Xen store access library which is also licenced under the LGPL.</p>
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</li>
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<li>
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<em>Can I embed libvirt in a proprietary application ?</em>
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<p>Yes. The LGPL allows you to embed libvirt into a proprietary
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application. It would be graceful to send-back bug fixes and improvements
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as patches for possible incorporation in the main development tree. It
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will decrease your maintenance costs anyway if you do so.</p>
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</li>
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</ol>
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<h3>
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<a name="Installati" id="Installati">Installation</a>
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</h3>
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<ol>
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<li><em>Where can I get libvirt</em> ?
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<p>The original distribution comes from <a href="ftp://libvirt.org/libvirt/">ftp://libvirt.org/libvirt/</a>.</p>
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</li>
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<li>
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<em>I can't install the libvirt/libvirt-devel RPM packages due to
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failed dependencies</em>
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<p>The most generic solution is to re-fetch the latest src.rpm , and
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rebuild it locally with</p>
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<p><code>rpm --rebuild libvirt-xxx.src.rpm</code>.</p>
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<p>If everything goes well it will generate two binary rpm packages (one
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providing the shared libs and virsh, and the other one, the -devel
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package, providing includes, static libraries and scripts needed to build
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applications with libvirt that you can install locally.</p>
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<p>One can also rebuild the RPMs from a tarball:</p>
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<p>
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<code>rpmbuild -ta libdir-xxx.tar.gz</code>
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</p>
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<p>Or from a configured tree with:</p>
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<p>
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<code>make rpm</code>
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</p>
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</li>
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<li>
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<em>Failure to use the API for non-root users</em>
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<p>Large parts of the API may only be accessible with root privileges,
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however the read only access to the xenstore data doesnot have to be
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forbidden to user, at least for monitoring purposes. If "virsh dominfo"
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fails to run as an user, change the mode of the xenstore read-only socket
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with:</p>
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<p>
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<code>chmod 666 /var/run/xenstored/socket_ro</code>
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</p>
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<p>and also make sure that the Xen Daemon is running correctly with local
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HTTP server enabled, this is defined in
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<code>/etc/xen/xend-config.sxp</code> which need the following line to be
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enabled:</p>
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<p>
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<code>(xend-http-server yes)</code>
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</p>
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<p>If needed restart the xend daemon after making the change with the
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following command run as root:</p>
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<p>
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<code>service xend restart</code>
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</p>
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</li>
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</ol>
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<h3>
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<a name="Compilatio" id="Compilatio">Compilation</a>
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</h3>
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<ol>
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<li>
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<em>What is the process to compile libvirt ?</em>
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<p>As most UNIX libraries libvirt follows the "standard":</p>
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<p>
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<code>gunzip -c libvirt-xxx.tar.gz | tar xvf -</code>
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</p>
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<p>
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<code>cd libvirt-xxxx</code>
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</p>
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<p>
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<code>./configure --help</code>
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</p>
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<p>to see the options, then the compilation/installation proper</p>
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<p>
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<code>./configure [possible options]</code>
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</p>
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<p>
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<code>make</code>
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</p>
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<p>
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<code>make install</code>
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</p>
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<p>At that point you may have to rerun ldconfig or a similar utility to
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update your list of installed shared libs.</p>
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</li>
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<li>
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<em>What other libraries are needed to compile/install libvirt ?</em>
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<p>Libvirt requires libxenstore, which is usually provided by the xen
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packages as well as the public headers to compile against libxenstore.</p>
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</li>
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<li>
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<em>I use the CVS version and there is no configure script</em>
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<p>The configure script (and other Makefiles) are generated. Use the
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autogen.sh script to regenerate the configure script and Makefiles,
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like:</p>
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<p>
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<code>./autogen.sh --prefix=/usr --disable-shared</code>
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</p>
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</li>
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</ol>
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<h3><a name="Developer" id="Developer">Developer</a> corner</h3>
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<ol>
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<li>
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<em>Troubles compiling or linking programs using libvirt</em>
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<p>To simplify the process of reusing the library, libvirt comes with
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pkgconfig support, which can be used directly from autoconf support or
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via the pkg-config command line tool, like:</p>
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<p>
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<code>pkg-config libvirt --libs</code>
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</p>
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</li>
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</ol>
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</body>
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</html>
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