名前¶

説明¶

The main steps are:

• Install the requirements.
• Build, either from the git repository or from a tarball.
• Run the tests.
• Run the tools from the source directory, or install.

REQUIREMENTS¶

 dnf builddep libguestfs

 yum-builddep libguestfs

 apt-get build-dep libguestfs

BUILDING FROM GIT¶

 git clone https://github.com/libguestfs/libguestfs
 cd libguestfs
 ./autogen.sh
 make

BUILDING FROM TARBALLS¶

 cd libguestfs-1.xx.yy
 ./configure
 make

RUNNING THE TESTS¶

To sanity check that the build worked, do:

 make quickcheck

To run the basic tests, do:

 make check

There are many more tests you can run. See guestfs-hacking(1) for details.

INSTALLING¶

Distro packagers can use:

 make INSTALLDIRS=vendor DESTDIR=[temp-build-dir] install

THE ./run SCRIPT¶

例:

 ./run guestfish [usual guestfish args ...]

 ./run virt-inspector [usual virt-inspector args ...]

The ./run script adds every libguestfs binary to the $PATH, so the above examples run guestfish and virt-inspector from the build directory (not the globally installed guestfish if there is one).

You can use the script from any directory. If you wanted to run your own libguestfs-using program, then the following command will also work:

 /path/to/libguestfs/run ./my_program [...]

You can also run the C programs under valgrind like this:

 ./run valgrind [valgrind opts...] virt-cat [virt-cat opts...]

or under gdb:

 ./run gdb --args virt-cat [virt-cat opts...]

This also works with sudo (eg. if you need root access for libvirt or to access a block device):

 sudo ./run virt-cat -d LinuxGuest /etc/passwd

To set environment variables, you can either do:

 LIBGUESTFS_HV=/my/qemu ./run guestfish

または:

 ./run env LIBGUESTFS_HV=/my/qemu guestfish

local* FILES¶

I have a file called localconfigure which is a simple wrapper around autogen.sh containing local configure customizations that I need. It looks like this:

 . localenv
 ./autogen.sh \
     -C \
     --enable-werror \
     "$@"

So I can use this to build libguestfs:

 ./localconfigure && make

If there is a file in the top build directory called localenv, then it will be sourced by "make". This file can contain any local environment variables needed, eg. for skipping tests:

 # 代替の python バイナリを使用します。
 export PYTHON=python3
 # このテストを飛ばします。これは壊れています。
 export SKIP_TEST_BTRFS_FSCK=1

Note that localenv is included by the top Makefile (so it's a Makefile fragment). But if it is also sourced by your localconfigure script then it is used as a shell script.

SELECTED ./configure SETTINGS¶

 ./configure --help

to list them all. This section covers some of the more important ones.

--disable-appliance --disable-daemon

See "USING A PREBUILT BINARY APPLIANCE" below.

--disable-erlang

--disable-gobject

--disable-golang

--disable-haskell

--disable-lua

--disable-ocaml

--disable-perl

--disable-php

--disable-python

--disable-ruby

Disable specific language bindings, even if "./configure" finds all the necessary libraries are installed so that they could be compiled.

Note that disabling OCaml or Perl will have the knock-on effect of disabling large numbers of virt tools and parts of the test suite.

--disable-fuse

Disable FUSE support in the API and the guestmount(1) tool.

--disable-gnulib-tests

On some platforms the GNUlib test suite can be flaky. This disables it, since errors in the GNUlib test suite are often not important.

--disable-static

Don't build a static linked version of the libguestfs library.

--enable-install-daemon

Normally guestfsd(8) is not installed by "make install", since that wouldn't be useful (instead it is "installed" inside the supermin appliance). However if packagers are building "libguestfs live" then they should use this option.

--enable-werror

This turns compiler warnings into errors (ie. "-Werror"). Use this for development, especially when submitting patches. It should generally not be used for production or distro builds.

--with-default-backend=libvirt

This controls the default method that libguestfs uses to run qemu (see "BACKEND" in guestfs(3)). If not specified, the default backend is "direct", which means libguestfs runs qemu directly.

Fedora and Red Hat Enterprise Linux (RHEL) ≥ 7 use this flag to change the default backend to "libvirt", because (especially in RHEL) the policy is not to allow any program to run qemu except via libvirt.

Note that despite this setting, all backends are built into libguestfs, and you can override the backend at runtime by setting the $LIBGUESTFS_BACKEND environment variable (or using API methods).

--with-extra="distroname=version,libvirt,..."

--with-extra="local"

This option controls the "extra" field returned by "guestfs_version" in guestfs(3) and also printed by virt tools' --version option. It is a free text field, but a good idea is to encode a comma-separated list of facts such as the distro name and version, whether libvirt is the default backend, and anything else that may help with debugging problems raised by users.

For custom and/or local builds, this can be set to "local" to indicate this is not a distro build.

--without-libvirt

Compile libguestfs without libvirt support, even if libvirt development libraries are installed.

--with-gtk=2

This option forces virt-p2v to be built against Gtk 2, which is currently the most widely tested configuration.

--with-qemu="bin1 bin2 ..."

Provide an alternate qemu binary (or list of binaries). This can be overridden at runtime by setting the "LIBGUESTFS_HV" environment variable.

--with-qemu-options="-M ... -cpu ..."

If qemu requires extra options to work on this platform, you can pass them here, and they will be used both when testing and running qemu.

--with-supermin-packager-config=yum.conf

This passes the --packager-config option to supermin(1).

The most common use for this is to build the appliance using an alternate repository (instead of using the installed yum/dnf/apt/etc configuration to find and download packages). You might need to use this if you want to build libguestfs without having a network connection. Examples of using this can be found in the Fedora "libguestfs.spec" file (see "BUILDING A PACKAGE FOR FEDORA" below for resources).

--with-supermin-extra-options="--opt1 --opt2 ..."

Pass additional options to supermin(1). See appliance/make.sh.in to understand precisely what this does.

PYTHON

This environment variable may be set to point to a python binary (eg. "python3"). When "./configure" runs, it inspects this python binary to find the version of Python, the location of Python libraries and so on. See "BUILDING PYTHON 2 AND PYTHON 3 BINDINGS" below.

SUPERMIN

This environment variable can be set to choose an alternative supermin(1) binary. This might be used, for example, if you want to use a newer upstream version of supermin than is packaged for your distro, or if supermin is not packaged at all. On RHEL 7, you must set "SUPERMIN=/usr/bin/supermin5" when compiling libguestfs.

NOTES ABOUT QEMU AND KVM¶

Different versions of qemu have problems booting the appliance for different reasons. This varies between versions of qemu, and Linux distributions which add their own patches.

If you find a problem, you could try using your own qemu built from source (qemu is very easy to build from source), with a "qemu wrapper". See "QEMU WRAPPERS" in guestfs(3).

By default the configure script will look for qemu-kvm (KVM support). KVM is much faster than using plain qemu.

You may also need to enable KVM support for non-root users, by following these instructions: http://www.linux-kvm.org/page/FAQ#How_can_I_use_kvm_with_a_non-privileged_user.3F

On some systems, this will work too:

 chmod 0666 /dev/kvm

On some systems, the chmod will not survive a reboot, and you will need to make edits to the udev configuration.

USING CLANG (LLVM) INSTEAD OF GCC¶

 export CC=clang
 ./configure
 make

USING A PREBUILT BINARY APPLIANCE¶

If you are using non-Linux, or a Linux distribution that does not have supermin(1) support, or simply if you don't want to build your own libguestfs appliance, then you can use one of the prebuilt binary appliances that we supply: http://libguestfs.org/download/binaries/appliance

Build libguestfs like this:

 ./configure --disable-appliance --disable-daemon
 make

Set $LIBGUESTFS_PATH to the path where you unpacked the appliance tarball, eg:

 export LIBGUESTFS_PATH=/usr/local/lib/guestfs/appliance

and run the libguestfs programs and virt tools in the normal way, eg. using the ./run script (see above).

BUILDING PYTHON 2 AND PYTHON 3 BINDINGS¶

You can override this behaviour by specifying an alternate Python binary, eg:

 PYTHON=/usr/bin/python3 ./configure

To build parallel Python 2 and Python 3 bindings, you will need to build libguestfs twice. The second time, you can disable all the other bindings and tools and just build the Python bindings. See the Fedora spec file (see below) for a complete example of how to do this.

BUILDING A PACKAGE FOR FEDORA¶

Libguestfs is built in Fedora using the ordinary Fedora build system (Koji).

BUILDING A PACKAGE FOR RED HAT ENTERPRISE LINUX¶

• We disable many features that we do not wish to support for RHEL customers. For example, the "libguestfs live" feature is disabled.
• We backport upstream features.

The patches we apply to RHEL releases are available publically in the upstream git repository, in a branch called "rhel-x.y"

For example, the RHEL 7.3 patches are available here: https://github.com/libguestfs/libguestfs/commits/rhel-7.3

The sources and spec files for RHEL versions of libguestfs are available on https://git.centos.org/project/rpms, and see also https://wiki.centos.org/Sources.

BUILDING i686 32 BIT VIRT-P2V¶

Building a 32 bit virt-p2v (i686) binary improves compatibility with older hardware. See virt-p2v-make-disk(1) for details. Although virt-p2v is a simple Gtk application, it is not especially easy to build just virt-p2v as a 32 bit application on a 64 bit host. Usually the simplest way is to use a 32 bit chroot or even a 32 bit virtual machine to build libguestfs.

On Fedora you can use the mock(1) tool. For example:

 fedpkg mockbuild --root fedora-23-i386

This will result in a virt-v2v-*.i686.rpm file which can be unpacked to extract the 32 bit virt-p2v binary.

The binary may be compressed to either p2v/virt-p2v.i686.xz, or $libdir/virt-p2v/virt-p2v.i686.xz or $VIRT_P2V_DATA_DIR/virt-p2v.i686.xz as appropriate. This enables the virt-p2v-make-disk(1) --arch option.

関連項目¶

著者¶

COPYRIGHT¶

LICENSE¶

BUGS¶

To report a new bug against libguestfs, use this link: https://bugzilla.redhat.com/enter_bug.cgi?component=libguestfs&product=Virtualization+Tools

When reporting a bug, please supply:

• The version of libguestfs.
• Where you got libguestfs (eg. which Linux distro, compiled from source, etc)
• Describe the bug accurately and give a way to reproduce it.
• Run libguestfs-test-tool(1) and paste the complete, unedited output into the bug report.