Ubuntu Manpage: guestfs-release-notes - libguestfs Release Notes

Provided by: libguestfs0_1.48.4-2ubuntu1_amd64

NAME

       guestfs-release-notes - libguestfs Release Notes

RELEASE NOTES FOR LIBGUESTFS 1.24

These release notes only cover the differences from the previous stable/dev branch split
(1.22.0). For detailed changelogs, please see the git repository, or the ChangeLog file
distributed in the tarball.

New features
User-Mode Linux (UML) can be used as an alternative backend (ie. instead of KVM). This
improves performance especially when using libguestfs inside a VM (eg. in the cloud). UML
is supported as a first-class backend. See "USER-MODE LINUX BACKEND" in guestfs(3) for
how to use this.

ARM (32 bit) and PPC64 are now fully supported.

Tools

virt-builder(1) is a new tool for building virtual machine images. It lets you rapidly
and securely create guests and customize them.

New virt-sysprep(1) operations: Remove files in /tmp and /var/tmp. Remove RPM database
files. Change root and user passwords. More log files are removed. New operations which
are not enabled by default: Create random UUIDs for filesystems. Reset firewall rules.
(Wanlong Gao)

virt-resize(1) and virt-sysprep can now use URIs to specify a remote disk.

Use "guestfish -N filename=type" to create a named disk image (instead of the default
test1.img etc).

virt-sparsify(1) now tests if there is enough disk space to complete the operation,
instead of possibly running out of space half way through.

virt-format(1) and virt-make-fs(1): new --label option for setting filesystem label.

virt-resize --no-sparse flag can be used to resize on to partitions and other targets that
are not zeroed.

Language bindings

New bindings for the Go programming language.

API

Support for the systemd journal.

"guestfs_add_drive_opts" can now control the qemu caching mode through a new "cachemode"
parameter. You can select improved performance for temporary drives, or safety.

"guestfs_set_label" now works for XFS and btrfs.

New GUESTFS_EVENT_WARNING event for warning messages.

Inspection

Better inspection of SUSE guests (Olaf Hering).

Better support for non-standard Windows %systemroot% (Matthew Booth).

Enhanced error reporting for Augeas errors.

Security
CVE-2013-2124
https://bugzilla.redhat.com/show_bug.cgi?id=968306

A denial of service was possible when inspecting certain guests. The fix has been
backported to 1.20 and 1.22 branches.

CVE-2013-4419
https://www.redhat.com/archives/libguestfs/2013-October/msg00031.html

Fix insecure temporary directory handling for remote guestfish. The fix has been
backported to 1.20 and 1.22 branches.

New APIs
add-drive-scratch: Add a temporary scratch drive
aug-label
aug-setm
journal-open: Systemd journal support
journal-close
journal-next
journal-skip
journal-get
journal-get-data-threshold
journal-set-data-threshold
remount: Allow rw flag to be adjusted on mounted filesystems
set-uuid: Set UUID of filesystem

"is-file", "is-dir", "is-blockdev", "is-chardev", "is-fifo", "is-socket" APIs now have an
extra "followsymlinks" flag.

"add-drive" has a new "cachemode" parameter.

Build changes
The following packages are required to build libguestfs 1.24:

Augeas ≥ 1.0.0

The following optional packages may be added to enhance functionality but are not
required:

sd-journal
To read journal files from guests which use that.

url_mkcow
For UML backend.

curl
gpg
xz For virt-builder.

golang ≥ 1.1.1
For Go language bindings.

Internals
New "make check-*" rules replace "make extra-tests". See "make help" and guestfs(3) for
details.

Perl code can now be valgrinded.

Inspection code is now fuzz-tested.

"make" no longer recurses into the generator directory in every other directory. This
reduces the overhead of builds considerably.

Additional tests for Augeas, hivex.

Add a launch timeout of 20 minutes waiting for the appliance to start up.

Add a timeout (4 hours) to all tests so we can catch the case where qemu or other
components hang.

Use kvmclock and "-cpu host". This improves clock stability and overall performance.

"./configure --enable-packet-dump" mode is fixed.

"./configure --enable-valgrind-daemon" mode has been rewritten. It is now feasible for
developers to keep this flag enabled at all times.

Backends have been refactored to be modular (although they are not actually loadable
modules).

When enabled, the network now uses resolver configuration (ie. /etc/resolv.conf) from the
host.

Bugs fixed
https://bugzilla.redhat.com/1019889
libguestfs-tools.conf should have a man page

https://bugzilla.redhat.com/1018149
valgrind errors in btrfs_subvolume_list

https://bugzilla.redhat.com/1002032
mke2fs can't return the correct filesystem type when blockscount is less than 2048 for
ext3

https://bugzilla.redhat.com/1001876
Update "rsync-out" helpout for using wildcard

https://bugzilla.redhat.com/1001875
Argument 'excludes' of tar-out does not work

https://bugzilla.redhat.com/1000428
virt-format uses wrong partition type for vfat filesystems

https://bugzilla.redhat.com/1000121
'sh' command before mount causes daemon to segfault

https://bugzilla.redhat.com/998513
guestfish does not work when you mix --remote and --add options

https://bugzilla.redhat.com/998482
guestfish remote prints "libguestfs: error: waitpid (qemu): No child processes"

https://bugzilla.redhat.com/995711
list-filesystems command fails if there are no block devices

https://bugzilla.redhat.com/994517
cache=none/O_DIRECT workaround doesn't work for images with backing files

https://bugzilla.redhat.com/989356
cap-get-file will return error if the file has not be set capabilities

https://bugzilla.redhat.com/986877
RFE: Implement set-uuid command

https://bugzilla.redhat.com/986875
RFE: Implement set-label for xfs

https://bugzilla.redhat.com/985269
Can't set acl value for a specified user with 'acl-set-file'

https://bugzilla.redhat.com/983218
libguestfs double free when kernel link fails during launch

https://bugzilla.redhat.com/981715
Make xfs filesystem failed with specified blocksize, gives "unknown option -b" error

https://bugzilla.redhat.com/981683
"hivex-commit" should fail with a relative path

https://bugzilla.redhat.com/981663
disk-format "qemu-img info: JSON parse error" when target file does not exist

https://bugzilla.redhat.com/978302
mke2fs-J should give a meaningful error when specified type is anything except
'ext{2,3,4}'

https://bugzilla.redhat.com/975797
Specifying virtio interface ('iface' parameter) breaks the direct backend - libguestfs
hangs

https://bugzilla.redhat.com/975753
"virt-resize --expand" and "virt-resize --resize" outputs error message for Win2008
32bit OS

https://bugzilla.redhat.com/975412
inspection: Augeas expressions are broken with augeas >= 0.10

https://bugzilla.redhat.com/974904
virt-resize --expand fails on Ubuntu Cloud Image

https://bugzilla.redhat.com/974489
Regression: Fedora inspection broken by change from guestfs_exists to guestfs_is_file

https://bugzilla.redhat.com/972775
txz-out command produces a bzip2-compressed file (should be xz-compressed)

https://bugzilla.redhat.com/969845
upload to a directory occasionally hangs instead of failing

https://bugzilla.redhat.com/968875
virt-sysprep should support URL-type arguments

https://bugzilla.redhat.com/624334
blockdev-setbsz succeeds, but does not affect blockdev-getbsz

AUTHOR

       Richard W.M. Jones

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