February 2026 - Libguestfs - Libguestfs List Archives

by Hilko Bengen

Running libguestfs-related tools as part of tests (libguestfs itself, guestfs-tools, nbdkit, etc.) in Debian's build and autopkgtest infrastructure would lead to flaky tests which I had trouble reproducing. Examples of bug reports relating to this problem: - https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1121473 - https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1123409 - https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1120924 Adding a partition and then creating or mounting a filesystem failed pretty often. I suspected a race condition involving udev creating the device node and I think it is more likely if qemu runs in TCG mode. For the Debian package I have added patches that makes the mkfs and mount functions simply wait up to 15s for the device node or path to appear, see below. This seems to have fixed the problem, at least I haven't seen reports breaking test runs since I added it. Is there a better way to do this? Cheers, -Hilko diff --git a/daemon/mkfs.c b/daemon/mkfs.c index fe2e678..66c937b 100644 --- a/daemon/mkfs.c +++ b/daemon/mkfs.c @@ -52,6 +52,14 @@ do_mkfs (const char *fstype, const char *device, int blocksize, CLEANUP_FREE char *err = NULL; int extfs = 0; + /* Wait up to 15s for device to appear */ + for (int j=0; i < 150; i++) { + if (!access (device, F_OK)) { + break; + } + usleep(100000); + } + if (fstype_is_extfs (fstype)) extfs = 1; diff --git a/daemon/mount.ml b/daemon/mount.ml index 171bea1..2f74555 100644 --- a/daemon/mount.ml +++ b/daemon/mount.ml @@ -30,6 +30,18 @@ let mount_vfs options vfs mountable mountpoint = let args = ref [] in + (* Wait up to 15s for device to appear *) + (match mountable.m_type with + | MountableDevice | MountablePath -> + if String.starts_with "/dev/" mountable.m_device then + let i = ref 0 in + while (not (Sys.file_exists mountable.m_device)) && (!i < 150) do + Unix.sleepf 0.1; + i := !i + 1; + done + | _ -> () + ); + (* -o options *) (match options, mountable.m_type with | "", (MountableDevice | MountablePath) -> ()

9 hours, 6 minutes

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nbdkit | Failed pipeline for master | abbf6fde

by GitLab

Pipeline #2322996229 has failed! Project: nbdkit ( https://gitlab.com/nbdkit/nbdkit ) Branch: master ( https://gitlab.com/nbdkit/nbdkit/-/commits/master ) Commit: abbf6fde ( https://gitlab.com/nbdkit/nbdkit/-/commit/abbf6fde1ad0a5a275721ad2acc47ca... ) Commit Message: extentlist: Suggest small script for reading ex... Commit Author: Richard W_M_ Jones ( https://gitlab.com/rwmjones ) Pipeline #2322996229 ( https://gitlab.com/nbdkit/nbdkit/-/pipelines/2322996229 ) triggered by Richard W_M_ Jones ( https://gitlab.com/rwmjones ) had 21 failed jobs. Job #13098872540 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13098872540/raw ) Stage: builds Name: aarch64-macos-14 Job #13098872532 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13098872532/raw ) Stage: builds Name: x86_64-freebsd-13 Job #13098872537 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13098872537/raw ) Stage: builds Name: x86_64-freebsd-current Job #13098872493 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13098872493/raw ) Stage: builds Name: x86_64-ubuntu-2204 Job #13098872502 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13098872502/raw ) Stage: builds Name: x86_64-ubuntu-2404 Job #13098872402 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13098872402/raw ) Stage: builds Name: x86_64-debian-12 Job #13098872352 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13098872352/raw ) Stage: builds Name: x86_64-almalinux-9 Job #13098872478 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13098872478/raw ) Stage: builds Name: x86_64-fedora-rawhide-clang Job #13098872450 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13098872450/raw ) Stage: builds Name: x86_64-fedora-43-clang Job #13098872472 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13098872472/raw ) Stage: builds Name: x86_64-fedora-rawhide Job #13098872446 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13098872446/raw ) Stage: builds Name: x86_64-fedora-43 Job #13098872363 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13098872363/raw ) Stage: builds Name: x86_64-alpine-322 Job #13098872431 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13098872431/raw ) Stage: builds Name: x86_64-fedora-42 Job #13098872390 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13098872390/raw ) Stage: builds Name: x86_64-centos-stream-9 Job #13098872414 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13098872414/raw ) Stage: builds Name: x86_64-debian-sid Job #13098872483 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13098872483/raw ) Stage: builds Name: x86_64-opensuse-leap-15 Job #13098872373 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13098872373/raw ) Stage: builds Name: x86_64-alpine-edge Job #13098872358 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13098872358/raw ) Stage: builds Name: x86_64-alpine-321 Job #13098872407 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13098872407/raw ) Stage: builds Name: x86_64-debian-13 Job #13098872486 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13098872486/raw ) Stage: builds Name: x86_64-opensuse-tumbleweed Job #13098872535 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13098872535/raw ) Stage: builds Name: x86_64-freebsd-14 -- You're receiving this email because of your account on gitlab.com.

1 day, 3 hours

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Re: Can't install ventoy 1.1.10-1 (lun. 26 janv. 2026 09:34:35)

by Richard W.M. Jones

On Wed, Feb 11, 2026 at 02:27:36PM +0100, tito2023 wrote: > I have it with garuda os I guess you'll need to ask them. It should be possible as we have a working Arch port. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into KVM guests. http://libguestfs.org/virt-v2v

2 days, 11 hours

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Re: Can't install ventoy 1.1.10-1 (lun. 26 janv. 2026 09:34:35)

by Richard W.M. Jones

On Mon, Jan 26, 2026 at 10:09:47AM +0100, tito2023 wrote: > ╭─atom@atom in ~ > ╰─λ libguestfs-test-tool Not much to go on. Where did you get libguestfs (self-built? from a distribution? which one?) Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-builder quickly builds VMs from scratch http://libguestfs.org/virt-builder.1.html

2 days, 11 hours

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Issue with libguestfs

by José Antonio Casado García

1. I'm trying to set a password for my root user on a virtual machine using virt-customize. 2. virt-customize -a server1.qcow2 --root-password password:s1st3mas 3. virt-customize: error: libguestfs error: /usr/bin/supermin exited with error status 1. To see full error messages you may need to enable debugging. Do: export LIBGUESTFS_DEBUG=1 LIBGUESTFS_TRACE=1 and run the command again. For further information, read: http://libguestfs.org/guestfs-faq.1.html#debugging-libguestfs You can also run 'libguestfs-test-tool' and post the *complete* output into a bug report or message to the libguestfs mailing list. If reporting bugs, run virt-customize with debugging enabled and include the complete output: virt-customize -v -x [...] 4. [ 0.0] Examining the guest ... libguestfs: trace: set_verbose true libguestfs: trace: set_verbose = 0 libguestfs: create: flags = 0, handle = 0x55819f53b990, program = virt-customize libguestfs: trace: set_network true libguestfs: trace: set_network = 0 libguestfs: trace: add_drive "server1.qcow2" "readonly:false" "protocol:file" "discard:besteffort" libguestfs: trace: add_drive = 0 libguestfs: trace: launch libguestfs: trace: max_disks libguestfs: trace: max_disks = 255 libguestfs: trace: get_tmpdir libguestfs: trace: get_tmpdir = "/tmp" libguestfs: trace: version libguestfs: trace: version = <struct guestfs_version = major: 1, minor: 46, release: 2, extra: , > libguestfs: trace: get_backend libguestfs: trace: get_backend = "direct" libguestfs: launch: program=virt-customize libguestfs: launch: version=1.46.2 libguestfs: launch: backend registered: unix libguestfs: launch: backend registered: uml libguestfs: launch: backend registered: libvirt libguestfs: launch: backend registered: direct libguestfs: launch: backend=direct libguestfs: launch: tmpdir=/tmp/libguestfsAKaDFv libguestfs: launch: umask=0022 libguestfs: launch: euid=1121 libguestfs: trace: get_cachedir libguestfs: trace: get_cachedir = "/var/tmp" libguestfs: begin building supermin appliance libguestfs: run supermin libguestfs: command: run: /usr/bin/supermin libguestfs: command: run: \ --build libguestfs: command: run: \ --verbose libguestfs: command: run: \ --if-newer libguestfs: command: run: \ --lock /var/tmp/.guestfs-1121/lock libguestfs: command: run: \ --copy-kernel libguestfs: command: run: \ -f ext2 libguestfs: command: run: \ --host-cpu x86_64 libguestfs: command: run: \ /usr/lib/x86_64-linux-gnu/guestfs/supermin.d libguestfs: command: run: \ -o /var/tmp/.guestfs-1121/appliance.d supermin: version: 5.2.1 supermin: package handler: debian/dpkg supermin: acquiring lock on /var/tmp/.guestfs-1121/lock supermin: build: /usr/lib/x86_64-linux-gnu/guestfs/supermin.d supermin: reading the supermin appliance supermin: build: visiting /usr/lib/x86_64-linux-gnu/guestfs/supermin.d/base.tar.gz type gzip base image (tar) supermin: build: visiting /usr/lib/x86_64-linux-gnu/guestfs/supermin.d/daemon.tar.gz type gzip base image (tar) supermin: build: visiting /usr/lib/x86_64-linux-gnu/guestfs/supermin.d/excludefiles type uncompressed excludefiles supermin: build: visiting /usr/lib/x86_64-linux-gnu/guestfs/supermin.d/hostfiles type uncompressed hostfiles supermin: build: visiting /usr/lib/x86_64-linux-gnu/guestfs/supermin.d/init.tar.gz type gzip base image (tar) supermin: build: visiting /usr/lib/x86_64-linux-gnu/guestfs/supermin.d/packages type uncompressed packages supermin: build: visiting /usr/lib/x86_64-linux-gnu/guestfs/supermin.d/packages-hfsplus type uncompressed packages supermin: build: visiting /usr/lib/x86_64-linux-gnu/guestfs/supermin.d/packages-reiserfs type uncompressed packages supermin: build: visiting /usr/lib/x86_64-linux-gnu/guestfs/supermin.d/packages-xfs type uncompressed packages supermin: build: visiting /usr/lib/x86_64-linux-gnu/guestfs/supermin.d/udev-rules.tar.gz type gzip base image (tar) supermin: mapping package names to installed packages supermin: resolving full list of package dependencies supermin: build: 218 packages, including dependencies supermin: build: 8444 files supermin: build: 4972 files, after matching excludefiles supermin: build: 4981 files, after adding hostfiles supermin: build: 4978 files, after removing unreadable files supermin: build: 4984 files, after munging supermin: kernel: looking for kernel using environment variables ... supermin: kernel: looking for kernels in /lib/modules/*/vmlinuz ... supermin: kernel: looking for kernels in /boot ... supermin: kernel: kernel version of /boot/vmlinuz-5.15.0-163-generic = 5.15.0-163-generic (from filename) supermin: kernel: picked modules path /lib/modules/5.15.0-163-generic supermin: kernel: kernel version of /boot/vmlinuz-5.15.0-161-generic = 5.15.0-161-generic (from content) supermin: kernel: picked modules path /lib/modules/5.15.0-161-generic supermin: kernel: picked vmlinuz /boot/vmlinuz-5.15.0-163-generic supermin: kernel: kernel_version 5.15.0-163-generic supermin: kernel: modpath /lib/modules/5.15.0-163-generic cp: cannot open '/boot/vmlinuz-5.15.0-163-generic' for reading: Permission denied supermin: cp -p '/boot/vmlinuz-5.15.0-163-generic' '/var/tmp/.guestfs-1121/appliance.d.5yqzh9qi/kernel': command failed, see earlier errors libguestfs: trace: launch = -1 (error) virt-customize: error: libguestfs error: /usr/bin/supermin exited with error status 1, see debug messages above If reporting bugs, run virt-customize with debugging enabled and include the complete output: virt-customize -v -x [...] libguestfs: trace: close libguestfs: closing guestfs handle 0x55819f53b990 (state 0) libguestfs: command: run: rm libguestfs: command: run: \ -rf /tmp/libguestfsAKaDFv

2 days, 12 hours

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nbdkit | Failed pipeline for master | 5edcc592

by GitLab

Pipeline #2313172241 has failed! Project: nbdkit ( https://gitlab.com/nbdkit/nbdkit ) Branch: master ( https://gitlab.com/nbdkit/nbdkit/-/commits/master ) Commit: 5edcc592 ( https://gitlab.com/nbdkit/nbdkit/-/commit/5edcc592dc9d4466596618da2d7507b... ) Commit Message: tests/test-sparse-random-blocksize.sh: Reduce m... Commit Author: Richard W_M_ Jones ( https://gitlab.com/rwmjones ) Pipeline #2313172241 ( https://gitlab.com/nbdkit/nbdkit/-/pipelines/2313172241 ) triggered by Richard W_M_ Jones ( https://gitlab.com/rwmjones ) had 2 failed jobs. Job #13032731914 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13032731914/raw ) Stage: builds Name: x86_64-fedora-42 Job #13032731933 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13032731933/raw ) Stage: builds Name: x86_64-freebsd-current -- You're receiving this email because of your account on gitlab.com.

5 days, 2 hours

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nbdkit | Failed pipeline for master | 47c5ccee

by GitLab

Pipeline #2313158553 has failed! Project: nbdkit ( https://gitlab.com/nbdkit/nbdkit ) Branch: master ( https://gitlab.com/nbdkit/nbdkit/-/commits/master ) Commit: 47c5ccee ( https://gitlab.com/nbdkit/nbdkit/-/commit/47c5cceeb262273c6c25c3b7f979ea9... ) Commit Message: vram: Cast cl_ulong to uint64_t before printing... Commit Author: Richard W_M_ Jones ( https://gitlab.com/rwmjones ) Pipeline #2313158553 ( https://gitlab.com/nbdkit/nbdkit/-/pipelines/2313158553 ) triggered by Richard W_M_ Jones ( https://gitlab.com/rwmjones ) had 2 failed jobs. Job #13032666693 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13032666693/raw ) Stage: builds Name: x86_64-almalinux-9 Job #13032666748 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/13032666748/raw ) Stage: builds Name: x86_64-freebsd-current -- You're receiving this email because of your account on gitlab.com.

5 days, 2 hours

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nbdkit | Failed pipeline for master | 49a3178b

by GitLab

Pipeline #2299093491 has failed! Project: nbdkit ( https://gitlab.com/nbdkit/nbdkit ) Branch: master ( https://gitlab.com/nbdkit/nbdkit/-/commits/master ) Commit: 49a3178b ( https://gitlab.com/nbdkit/nbdkit/-/commit/49a3178b52509a8a8fd0e5a1c49846b... ) Commit Message: Version 1.47.3. Commit Author: Richard W_M_ Jones ( https://gitlab.com/rwmjones ) Pipeline #2299093491 ( https://gitlab.com/nbdkit/nbdkit/-/pipelines/2299093491 ) triggered by Richard W_M_ Jones ( https://gitlab.com/rwmjones ) had 2 failed jobs. Job #12943467579 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/12943467579/raw ) Stage: builds Name: x86_64-debian-12 Job #12943467607 ( https://gitlab.com/nbdkit/nbdkit/-/jobs/12943467607/raw ) Stage: builds Name: x86_64-freebsd-current -- You're receiving this email because of your account on gitlab.com.

1 week, 5 days

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libnbd | Failed pipeline for master | f0ae71a1

by GitLab

Pipeline #2298952280 has failed! Project: libnbd ( https://gitlab.com/nbdkit/libnbd ) Branch: master ( https://gitlab.com/nbdkit/libnbd/-/commits/master ) Commit: f0ae71a1 ( https://gitlab.com/nbdkit/libnbd/-/commit/f0ae71a15d3b4e53b9eada7f56e0450... ) Commit Message: python: Test h.aio_connect using an IP address ... Commit Author: Richard W_M_ Jones ( https://gitlab.com/rwmjones ) Pipeline #2298952280 ( https://gitlab.com/nbdkit/libnbd/-/pipelines/2298952280 ) triggered by Richard W_M_ Jones ( https://gitlab.com/rwmjones ) had 23 failed jobs. Job #12942836222 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836222/raw ) Stage: builds Name: x86_64-freebsd-current Job #12942836185 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836185/raw ) Stage: builds Name: x86_64-alpine-321 Job #12942836190 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836190/raw ) Stage: builds Name: x86_64-alpine-322 Job #12942836191 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836191/raw ) Stage: builds Name: x86_64-alpine-edge Job #12942836219 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836219/raw ) Stage: builds Name: i686-debian-13 Job #12942836218 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836218/raw ) Stage: builds Name: i686-debian-12 Job #12942836206 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836206/raw ) Stage: builds Name: x86_64-fedora-rawhide-no-libxml2 Job #12942836214 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836214/raw ) Stage: builds Name: x86_64-ubuntu-2204 Job #12942836194 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836194/raw ) Stage: builds Name: x86_64-debian-12 Job #12942836223 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836223/raw ) Stage: builds Name: aarch64-macos-14 Job #12942836203 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836203/raw ) Stage: builds Name: x86_64-fedora-rawhide Job #12942836198 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836198/raw ) Stage: builds Name: x86_64-fedora-42 Job #12942836205 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836205/raw ) Stage: builds Name: x86_64-fedora-rawhide-clang Job #12942836193 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836193/raw ) Stage: builds Name: x86_64-centos-stream-9 Job #12942836196 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836196/raw ) Stage: builds Name: x86_64-debian-sid Job #12942836207 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836207/raw ) Stage: builds Name: x86_64-opensuse-leap-15 Job #12942836195 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836195/raw ) Stage: builds Name: x86_64-debian-13 Job #12942836192 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836192/raw ) Stage: builds Name: x86_64-almalinux-9 Job #12942836201 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836201/raw ) Stage: builds Name: x86_64-fedora-43 Job #12942836217 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836217/raw ) Stage: builds Name: x86_64-ubuntu-2404 Job #12942836210 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836210/raw ) Stage: builds Name: x86_64-opensuse-tumbleweed Job #12942836221 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836221/raw ) Stage: builds Name: x86_64-freebsd-14 Job #12942836220 ( https://gitlab.com/nbdkit/libnbd/-/jobs/12942836220/raw ) Stage: builds Name: x86_64-freebsd-13 -- You're receiving this email because of your account on gitlab.com.

1 week, 5 days

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Libguestfs February 2026