Libguestfs January 2016

guestfs@lists.libguestfs.org

20 participants
45 discussions

by Keresztes Péter-Zoltán

Hello, I am trying to resize some virtual machines and I get the following error: server-12 (out): Fatal error: exception Guestfs.Error("part_get_parttype: parted print: /dev/sda: parted: error while loading shared libraries: libparted.so.0: cannot open shared object file: No such file or directory") I have checked and I have liberated.so.0 on the servers. I have run ld.config to update the library paths but it does not help at all. regards, Peter

10 years, 1 month

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ANNOUNCE: libguestfs 1.32 released

by Richard W.M. Jones

I'm pleased to announce libguestfs 1.32, a library and set of tools for accessing and modifying virtual machine disk images. This release took 6 months of work by many people - see release notes below. You can get libguestfs 1.32 here: Main website: http://libguestfs.org/ Source: http://libguestfs.org/download/1.32-stable/ Fedora 23+: http://koji.fedoraproject.org/koji/packageinfo?packageID=8391 It will appear as an update for F23 in about a week. Debian/experimental coming soon, see: https://packages.debian.org/libguestfs0 Release notes (from http://libguestfs.org/guestfs-release-notes.1.html): New features New tools The new virt-v2v-copy-to-local(1) tool is an ancillary tool for virt-v2v(1) allowing you to convert source guests that virt-v2v is unable to access directly. New features in existing tools Virt-customize knows how to write a random seed to CirrOS (Pino Toscano). On Fedora, virt-customize runs dnf(8) with the --best flag, ensuring it always updates to the latest available packages. Virt-builder now provides 32 bit Fedora templates. Virt-builder and virt-customize --install option now works on 32 bit Fedora guests. Previously it would try to install 64 bit packages (Jan Sedlák). Virt-builder can now fetch cloud images using Simple Streams v1.0 metadata (Pino Toscano). Virt-builder can now fetch openSUSE cloud images out of the box (Cédric Bosdonnat). Virt-customize will now use stronger (SHA-512) encrypted passwords by default on openSUSE ≥ 11 (Pino Toscano). Virt-builder will now correctly handle output filenames containing colon characters (":"), and will create temporary files in the libguestfs cache directory instead of defaulting to /tmp (Pino Toscano). Virt-resize has a new --unknown-filesystems option to control what to do when asked to resize a filesystem that libguestfs doesn't know how to resize. Virt-v2v now has an --in-place flag/mode, allowing in-place conversion of guests (Roman Kagan). Virt-v2v has a --compressed option for creating compressed qcow2 output files. Virt-v2v can now correctly get the VMware datacenter path (dcPath) from libvirt, instead of having to calculate it using an algorithm that occasionally got the wrong answer (Matthias Bolte, Tingting Zheng). Virt-v2v now processes RAM sizes correctly for 64 bit guests when running on a 32 bit host. Language bindings In Perl and Python programs, the "get_program_name" API now returns the true program name, instead of the incorrect string "perl" or "python". The Python bindings can now be compiled against a different version of libguestfs, allowing the pip module to be built against any version of libguestfs (instead of requiring the pip module and libguestfs to have exactly the same version). The quality of the Ruby rdoc (documentation) has been improved (Pino Toscano). Perl scripts no longer hard-code the location of perl in the shebang line, but use env(1) to locate it instead (Pino Toscano). In OCaml programs, the guestfs handle was incorrectly made into a global root, meaning it could never be garbage collected. If you didn't call the "close" function explicitly, the handle would not be closed until the whole program exited. This has now been fixed so handles will be garbage collected in the usual way. This changes the API of the OCaml function "Guestfs.event_callback". Note that non-C language bindings are not covered by the libguestfs API/ABI guarantee, although we try hard not to change them, but in this case it was essential in order to fix this very serious bug. Inspection Alpine Linux and the APK package manager, ALT Linux, Frugalware, and PLD Linux are now recognized (Pino Toscano). If it exists, /etc/os-release will be preferred for inspecting Linux guests (Pino Toscano). The correct kernel version is returned for Windows guests ≥ 10. Documentation The large guestfs(3) man page has been split into several separate man pages: guestfs-hacking(1) guestfs-internals(1) guestfs-security(1). In the source tree, a new docs directory contains this documentation. Architectures and platforms Libguestfs now supports ARM 64 bit platforms with vGICv3. Security See also guestfs-security(1). "CVE-2015-5745" https://bugzilla.redhat.com/1251157 This is not a vulnerability in libguestfs, but because we always give a virtio-serial port to each guest (since that is how guest- host communication happens), an escalation from the appliance to the host qemu process is possible. This could affect you if: · your libguestfs program runs untrusted programs out of the guest (using "guestfs_sh" etc), or · another exploit was found in (for example) kernel filesystem code that allowed a malformed filesystem to take over the appliance. If you use sVirt to confine qemu, that would thwart some attacks. Virt-customize permissions on .ssh, .ssh/authorized_keys https://bugzilla.redhat.com/1260778. Previously when asked to inject an SSH key into a guest, virt- customize (hence virt-builder too) would create the .ssh directory and .ssh/authorized_keys file with too broad permissions, allowing other users to read. They are now created as 0700 and 0600 respectively, which is the same as the ssh-copy-id(1) utility. API New APIs "guestfs_get_identifier" "guestfs_set_identifier" Get/set a per-handle identifier. The main effect of this is to change trace output from: libguestfs: trace: foo to: libguestfs: trace: ID: foo making it easier to follow traces in multi-threaded programs, or where a program uses multiple handles (especially virt-v2v). "guestfs_vfs_minimum_size" Return the minimum size of a filesystem (when shrunk). This supports ext2/3/4, XFS and btrfs, and can support other filesystem types in future (Maxim Perevedentsev). Other API changes "guestfs_disk_create": add "preallocation" = "off"/"metadata"/"full". For raw, this allows "off" as a synonym for "sparse" (making it consistent with qcow2). For qcow2, this allows "sparse" as a synonym for "off". It also adds "full", which corresponds to fully allocated, but uses posix_fallocate(3) for efficiency. "guestfs_tar_in": new "xattrs", "selinux", "acl" parameters. "guestfs_tar_out": new "xattrs", "selinux", "acl" parameters. These extra parameters control whether extended attributes, SELinux contexts and/or POSIX ACLs are restored from / saved to tarballs. "guestfs_add_drive" The existing "username" and "secret" parameters can be used to supply authentication for iSCSI (Pino Toscano). Build changes The "./configure --enable-valgrind-daemon" option has been removed. You can no longer build libguestfs on RHEL 5-era (c.2007) machines. See the "oldlinux" branch if you need (limited) RHEL 5 support. Virt-p2v can now be built on RHEL 6-era (c.2010) Linux distros. OCaml ≥ 3.11 (released in 2008) is now required to build from git. Building the Perl bindings now requires "Module::Build" (instead of "ExtUtils::MakeMaker"). Builds should be faster (especially when incrementally rebuilding), because work was done to reduce build times. Both OCaml and the OCaml findlib module are required if you need to run the generator at build time. Previously the build would have failed if findlib was not installed. "make check" tests now run in parallel (within each test directory). "make install" no longer installs OCaml bindtests.* files incorrectly. "make install" can now be run twice. Previously it would fail on the second run. "make clean" should now remove nearly every file that "make" creates. A new "make installcheck" rule has been added, allowing the installed copy of libguestfs to be tested. Internals Some effort was put into minimizing the size of the appliance, which reduces temporary disk space and time needed by libguestfs handles. The appliance now passes the NIC name to dhcpd, fixing hangs when running the appliance on some distros (Cédric Bosdonnat). OCaml "Guestfs.Errno" is now generated (Pino Toscano). In OCaml tools, common code now handles --debug-gc, --verbose and other common options (Roman Kagan, Pino Toscano). The virt-v2v test harness allows us to boot the test guests at fixed dates in the past, ensuring that Windows reactivation doesn't kick in. There is a new internal API for reading/writing a subprocess via a pipe from library code. Used "deheader" program to remove unused "#include" directives. In OCaml tools, the "Char" and "String" modules now implicitly reference the "Common_utils.Char" and "Common_utils.String" modules (instead of the ones from stdlib). The "Common_utils" modules contain a number of extra char/string utility functions, and also hide some unsafe functions in stdlib. Many more virt-v2v tests will now be run even if you don't have rhsrvany and virtio-win installed (Roman Kagan). The huge configure.ac file has been split into several smaller files called m4/guestfs_*.m4. The old tests/data and tests/guests directories have been moved to test-data/. This new top level directory carries all test data which is common, large and/or shared between multiple tests. There is a new top level website/ directory containing the public http://libguestfs.org website (or most of it). The fuzz testing of inspection (tests/fuzz) has been removed. Virt-p2v now saves the source physical machine dmesg output into the conversion server debug directory, making it simpler to debug cases of missing drivers, firmware etc. Bugs fixed https://bugzilla.redhat.com/1294956 set-label returns wrong error message when set the ext3/ext4 filesystem label https://bugzilla.redhat.com/1288733 Add a Fedora 23 32-bit base image for virt-builder https://bugzilla.redhat.com/1288201 virt-builder writes temporary files to /tmp https://bugzilla.redhat.com/1285847 virt-resize does not copy logical partitions https://bugzilla.redhat.com/1281578 virt-inspector returns version 6.3 for win10 images (should return 10.0) https://bugzilla.redhat.com/1281577 virt-inspector --xpath segfault on attribute get https://bugzilla.redhat.com/1280029 libguestfs can run commands with stdin not open (or worse still, connected to arbitrary guest-chosen random devices) https://bugzilla.redhat.com/1279273 About compression option for qcow2 https://bugzilla.redhat.com/1278878 guestfish should be able to handle LVM thin layouts https://bugzilla.redhat.com/1278382 DNF python programming error when run from virt-builder https://bugzilla.redhat.com/1278371 inspection returns arch="unknown" for Windows guest if file command is not installed https://bugzilla.redhat.com/1277274 Document permissions needed for non-admin users to use virt-v2v https://bugzilla.redhat.com/1277122 RFE: virt-sparsify: make '--in-place' sparsification safe to abort (gracefully or ungracefully) https://bugzilla.redhat.com/1277074 Virt-p2v client shouldn't present the vdsm option because it's not usable https://bugzilla.redhat.com/1276540 virt-v2v fails to convert Windows raw image: error "device name is not a partition" https://bugzilla.redhat.com/1275806 virt-builder: error: [file] is not a regular file in the guest https://bugzilla.redhat.com/1270011 Simplestreams test fails: virt-builder: error: the value for the key 'size' is not an integer https://bugzilla.redhat.com/1267032 guestfish copy-in command behaves oddly/unexpectedly with wildcards https://bugzilla.redhat.com/1262983 python: Cannot compile pip module if installed libguestfs != pip guestfs version https://bugzilla.redhat.com/1262127 Better diagnostic message when virbr0 doesn't exist https://bugzilla.redhat.com/1261436 No warning shows when convert a win7 guest with AVG AntiVirus installed https://bugzilla.redhat.com/1260778 virt-builder --ssh-inject doesn't set proper permissions on created files https://bugzilla.redhat.com/1260689 RFE: V2V to check and warn user to disable group policy and anti virus on Windows guests https://bugzilla.redhat.com/1260590 Wrong graphics protocal and video type set for guest after convert to rhev 3.6 by virt-v2v https://bugzilla.redhat.com/1258342 extra slashes in vcenter URL confuses virt-v2v https://bugzilla.redhat.com/1257895 [RHEV][V2V] virt-v2v ignores NIC if interface source/@network or source/@bridge is an empty string https://bugzilla.redhat.com/1256405 virt-builder created Fedora 22 32bit disk image cannot be updated https://bugzilla.redhat.com/1256222 virt-p2v no GUI mode:error opening control connection to $ip:22:unexpected …rompt https://bugzilla.redhat.com/1251909 Option -oa preallocated -of qcow2 of virt-v2v didn't work efficiently https://bugzilla.redhat.com/1250715 v2v: spaces need to be escaped as %20 in paths https://bugzilla.redhat.com/1248678 Close all incoming ports on virt-p2v ISO https://bugzilla.redhat.com/1246882 man virt-customize shows synopsis twice https://bugzilla.redhat.com/1242853 mount-loop failed to setup loop device: No such file or directory https://bugzilla.redhat.com/1237136 BUG: unable to handle kernel NULL pointer dereference at <addr> in function __blkg_lookup https://bugzilla.redhat.com/1230412 virt-v2v should ignore bogus kernel entries in grub config https://bugzilla.redhat.com/1229119 Unrelated info in fstab makes virt-v2v fail with unclear error info https://bugzilla.redhat.com/1227609 virt-p2v: Using "Back" button causes output list to be repopulated multiple times https://bugzilla.redhat.com/1225789 Wrong video driver is installed for rhel5.11 guest after conversion to libvirt https://bugzilla.redhat.com/1204131 RFE: virt-builder creates qcow v3 images, add build option for qcow v2 https://bugzilla.redhat.com/1176801 File /etc/sysconfig/kernel isn't updated when convert XenPV guest with regular kernel installed https://bugzilla.redhat.com/1174551 "lstatnslist" and "lstatlist" don't give an error if the API is used wrongly https://bugzilla.redhat.com/1168223 koji spin-livecd cannot build a working live CD https://bugzilla.redhat.com/1165785 mount-loop command fails: mount failed: Unknown error -1 https://bugzilla.redhat.com/1164708 set-label can only set <=127 bytes for btrfs and <=126 bytes for ntfs filesystem which not meet the help message. Also for ntfs it should give a warning message when the length >128 bytes https://bugzilla.redhat.com/1020216 libvirt fails to shut down domain: could not destroy libvirt domain: Requested operation is not valid: domain is not running https://bugzilla.redhat.com/1011907 mount-loop failed to setup loop device: No such file or directory Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com Fedora Windows cross-compiler. Compile Windows programs, test, and build Windows installers. Over 100 libraries supported. http://fedoraproject.org/wiki/MinGW

10 years, 1 month

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Question how to implement remote access

by BYEONG-GI KIM

Hello. I've been finding a good solution to monitor virtual machines' status such as memory, disk, cpu, etc, and I found this as a tool for measuring disk/image status. I have a question while using the libguestfs-java library; I'd wanted to implement a sample app which retrieve the disk information remotely. Is there any way, i.e., specific API(s) to connect with a host where kvm/qemu has been installed from a remote node, to access and get VMs' disk related information remotely? I read JavaDoc and libguestfs-java sample code from http://libguestfs.org/guestfs-java.3.html, but I could not find such an example. Thanks in advance! best regards bgkim

10 years, 1 month

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[PATCH 0/3] podwrapper: Generate consistent WARNING sections (RHBZ#1293527).

by Richard W.M. Jones

Fix for: https://bugzilla.redhat.com/show_bug.cgi?id=1293527 Note that patches 2/3 and 3/3 are dependent on each other, ie. applying 2/3 on its own will break the build. So I may combine these when applying the series. Rich.

10 years, 1 month

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[PATCH] customize: Document missing command line parameters in the synopsis.

by Richard W.M. Jones

I noticed that the --attach option was not covered in the synopsis. This commit documents all of the missing command line parameters in the synopsis. --- customize/virt-customize.pod | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/customize/virt-customize.pod b/customize/virt-customize.pod index 3fe9050..8fb9931 100644 --- a/customize/virt-customize.pod +++ b/customize/virt-customize.pod @@ -4,10 +4,17 @@ virt-customize - Customize a virtual machine =head1 SYNOPSIS - virt-customize [--options] - [ -d domname | -a disk.img [-a disk.img ...] ] + virt-customize + [ -a disk.img [ -a disk.img ... ] | -d domname ] + [--attach ISOFILE] [--attach-format FORMAT] + [ -c URI | --connect URI ] [ -n | --dry-run ] + [ --format FORMAT] [ -m MB | --memsize MB ] + [ --network | --no-network ] + [ -q | --quiet ] [--smp N] [ -v | --verbose ] [-x] __CUSTOMIZE_SYNOPSIS__ + virt-customize [ -V | --version ] + =head1 DESCRIPTION Virt-customize can customize a virtual machine (disk image) by -- 2.5.0

10 years, 1 month

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Libguestfs January 2016