mirror of https://gitee.com/openkylin/libvirt.git
141 lines
4.5 KiB
XML
141 lines
4.5 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html>
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<html xmlns="http://www.w3.org/1999/xhtml">
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<body>
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<h1><a id="installation">libvirt Installation</a></h1>
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<ul id="toc"></ul>
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<h2><a id="compiling">Compiling a release tarball</a></h2>
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<p>
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libvirt uses the standard configure/make/install steps:
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</p>
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<pre>
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$ xz -c libvirt-x.x.x.tar.xz | tar xvf -
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$ cd libvirt-x.x.x
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$ ./configure</pre>
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<p>
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The <i>configure</i> script can be given options to change its default
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behaviour.
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</p>
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<p>
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To get the complete list of the options it can take, pass it the
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<i>--help</i> option like this:
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</p>
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<pre>
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$ ./configure <i>--help</i></pre>
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<p>
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When you have determined which options you want to use (if any),
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continue the process.
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</p>
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<p>
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Note the use of <b>sudo</b> with the <i>make install</i> command
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below. Using sudo is only required when installing to a location your
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user does not have write access to. Installing to a system location
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is a good example of this.
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</p>
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<p>
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If you are installing to a location that your user <i>does</i> have write
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access to, then you can instead run the <i>make install</i> command
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without putting <b>sudo</b> before it.
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</p>
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<pre>
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$ ./configure <i>[possible options]</i>
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$ make
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$ <b>sudo</b> <i>make install</i></pre>
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<p>
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At this point you <b>may</b> have to run ldconfig or a similar utility
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to update your list of installed shared libs.
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</p>
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<h2><a id="building">Building from a GIT checkout</a></h2>
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<p>
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The libvirt build process uses GNU autotools, so after obtaining a
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checkout it is necessary to generate the configure script and Makefile.in
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templates using the <code>autogen.sh</code> command. By default when
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the <code>configure</code> script is run from within a GIT checkout, it
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will turn on -Werror for builds. This can be disabled with
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--disable-werror, but this is not recommended.
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</p>
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<p>
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Libvirt takes advantage of
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the <a href="http://www.gnu.org/software/gnulib/">gnulib</a>
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project to provide portability to a number of platforms. This
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is normally done dynamically via a git submodule in
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the <code>.gnulib</code> subdirectory, which is auto-updated as
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needed when you do incremental builds. Setting the environment
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variable <code>GNULIB_SRCDIR</code> to a local directory
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containing a git checkout of gnulib will let you reduce local
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disk space requirements and network download time, regardless of
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which actual commit you have in that reference directory.
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</p>
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<p>
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However, if you are developing on a platform where git is not
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available, or are behind a firewall that does not allow for git
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to easily obtain the gnulib submodule, it is possible to instead
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use a static mode of operation where you are then responsible
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for updating the git submodule yourself. In this mode, you must
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track the exact gnulib commit needed by libvirt (usually not the
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latest gnulib.git) via alternative means, such as a shared NFS
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drive or manual download, and run this any time libvirt.git
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updates the commit stored in the .gnulib submodule:</p>
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<pre>
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$ GNULIB_SRCDIR=/path/to/gnulib ./autogen.sh --no-git
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</pre>
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<p>To build & install libvirt to your home
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directory the following commands can be run:
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</p>
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<pre>
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$ ./autogen.sh --prefix=$HOME/usr
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$ make
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$ <b>sudo</b> make install</pre>
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<p>
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Be aware though, that binaries built with a custom prefix will not
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interoperate with OS vendor provided binaries, since the UNIX socket
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paths will all be different. To produce a build that is compatible
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with normal OS vendor prefixes, use
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</p>
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<pre>
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$ ./autogen.sh --system
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$ make
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</pre>
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<p>
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When doing this for day-to-day development purposes, it is recommended
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not to install over the OS vendor provided binaries. Instead simply
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run libvirt directly from the source tree. For example to run
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a privileged libvirtd instance
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</p>
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<pre>
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$ su -
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# service libvirtd stop (or systemctl stop libvirtd.service)
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# /home/to/your/checkout/daemon/libvirtd
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</pre>
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<p>
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It is also possible to run virsh directly from the source tree
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using the ./run script (which sets some environment variables):
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</p>
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<pre>
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$ ./run ./tools/virsh ....
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</pre>
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</body>
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</html>
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