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4878a33125
Add a note about setting the LIBVIRT_DRIVER_DIR env variable, explain --system and fix example to use --disable-werror
119 lines
3.5 KiB
XML
119 lines
3.5 KiB
XML
<?xml version="1.0"?>
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<html>
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<body>
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<h1><a name="installation">libvirt Installation</a></h1>
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<ul id="toc"></ul>
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<h2><a name="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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$ gunzip -c libvirt-x.x.x.tar.gz | 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 name="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 --disable-werror,
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but this is not recommended. 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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</p>
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<pre>
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$ ./tools/virsh ....
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</pre>
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<p>
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A normal configuration of libvirt will build hypervisor drivers
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as loadable modules. When running from a non-installed source
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tree, libvirtd will attempt to find the modules from the same
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source tree. If this is not possible though, you can explicitly
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set <code>LIBVIRT_DRIVER_DIR=/path/to/source/tree/src/.libs</code>
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</p>
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</body>
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</html>
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