similar to: parallelization

Is there any articles that explain in detail how actually guestmount works internally? My main question is how does guestfs deal with backing disk changes. So, I have a libvirt/qemu-kvm setup. Each vm has a lvm2 volume for a disk. For example, I want to mount one of these volumes and read some data. 1. I mount the volume using guestmount (guestmount --ro -d <libvirt domain> -m /dev/sda1

I seem to be having trouble using guestmount to mount a Fedora 24 disk that is using XFS.  This is the error messings I get when I try: root@cpdev-cn5:/var/lib/libvirt/images/base# guestmount --rw -a ${disk_path}/${disk_name} -m /dev/${target}1 /tmp/fedora-master/ libguestfs: error: mount_options: /dev/vda1 on /: mount: wrong fs type, bad option, bad superblock on /dev/vda1, missing

I seem to be having trouble using guestmount to mount a Fedora 24 disk that is using XFS.  This is the error messings I get when I try: root@cpdev-cn5:/var/lib/libvirt/images/base# guestmount --rw -a ${disk_path}/${disk_name} -m /dev/${target}1 /tmp/fedora-master/ libguestfs: error: mount_options: /dev/vda1 on /: mount: wrong fs type, bad option, bad superblock on /dev/vda1, missing

Many thanks for a quick reply, see also https://bugzilla.redhat.com/show_bug.cgi?id=1413499#c5 Looks like the same issue as mine. But any way - a full log of guestmount, running it with -v -x and host + VM info are attached, probably I've missed something important in the output. Thank you! 29.03.2017, 15:47, "Pino Toscano" : Hi, On Wednesday, 29 March 2017 06:28:06 CEST

* PATCH FOR DISCUSSION ONLY - NOT TO BE APPLIED * Colin suggested something which seems eminently sensible: https://bugzilla.redhat.com/show_bug.cgi?id=916780 I've been through a couple of rounds of trying to implement this. I started with adding the option as suggested to the guestmount program, but it tended to make the guestmount program more complex. More importantly, adding the option

Hello, I get the following message on virt-edit Guestname /boot/grub/grub.conf. I have executed the command. guestmount ?ro -a /var/lib/nova/instances/instance-00000001/disk -m /dev/sda1 /mnt guestmount -d instance-00000001 -i ?ro /mnt root at compute:~# virt-edit instance-00000001 /boot/grub/grub.conf libguestfs: error: error: domain is a live virtual machine. Writing to the disks of a running

I'm wondering whether or not anyone has tried to use guestmount on an image with a ZFS partition (MBR partition table). I can't seem to find much on the internet regarding it, but I do see hints that may lead me to a solution. I'm under the impression that libguestfs can use what ever is available to the kernel on the host -- in my case I have zfs-use installed and running. I

Hello all, I am having an issue with guestmount in respect to live instances and I was hoping someone might have an idea where I've gone wrong. The following output is from my shell session, if there's any more information needed please let me know and I'll happily provide it. [root at longitude ~]# virt-filesystems -d F16-rawhide/dev/sda2 /dev/sda3 [root at longitude ~]#

On Fri, Aug 05, 2016 at 02:46:11PM +0000, Andre Goree wrote: > > I seem to be having trouble using guestmount to mount a Fedora 24 disk that is using XFS.  This is the error messings I get when I try: > > root@cpdev-cn5:/var/lib/libvirt/images/base# guestmount --rw -a ${disk_path}/${disk_name} -m /dev/${target}1 /tmp/fedora-master/ > libguestfs: error: mount_options: /dev/vda1 on

On Fri, Aug 05, 2016 at 02:46:11PM +0000, Andre Goree wrote: > > I seem to be having trouble using guestmount to mount a Fedora 24 disk that is using XFS.  This is the error messings I get when I try: > > root@cpdev-cn5:/var/lib/libvirt/images/base# guestmount --rw -a ${disk_path}/${disk_name} -m /dev/${target}1 /tmp/fedora-master/ > libguestfs: error: mount_options: /dev/vda1 on

Hi guys, I've struggled in this error for 1 week and your help is really appreciated. As one EMC software engineer, I need to setup the libguestfs tool in SUSE12 ( SUSE11SP4 is also OK, while SUSE12 is preferred ) to mount some qcow2 image from openstack environment. Then we can read its file system architecture and restore some files. 1. The first thing is we build one SUSE

Thanks for your response Rich. Please see the output of --trace --verbose below. Regarding your suggestion to convert the vmdk to some other format, I do not want to do it. A security consultant said by modifying certain files in our VM and restarting the VM, one can gain access to encrypted data in our VM. I want to reproduce it. I am able to mount the VM but not able to modify files since it can

Hi. In ocfs2, fdatasync and fsync are identical. I think fdatasync should skip committing transaction when inode->i_state is set just I_DIRTY_SYNC and this indicates only atime or/and mtime updates. Following patch improves fdatasync throughput. #sysbench --num-threads=16 --max-requests=300000 --test=fileio --file-block-size=4K --file-total-size=16G --file-test-mode=rndwr

Hi. In btrfs, fdatasync and fsync are identical. I think fdatasync should skip committing transaction when inode->i_state is set just I_DIRTY_SYNC and this indicates only atime or/and mtime updates. Following patch improves fdatasync throughput. #sysbench --num-threads=16 --max-requests=10000 --test=fileio --file-block-size=4K --file-total-size=16G --file-test-mode=rndwr

Hello, We found that fsync and fdatasync syscalls sometimes don't sync data in an ext3 file system under the following conditions. 1. Kernel version is 2.6.6 or later (including 2.6.8.1 and 2.6.9-rc2). 2. Ext3's journalling mode is "data=journal". 3. Create a file (whose size is 1Mbytes) and execute umount/mount. 4. lseek to a random position within the file, write 8192 bytes

Hi, this series update libguestfs to a recent gnulib version, so that we can use its new getprogname module, and solve altogether one of the porting issues (the need for 'program_name' by the error module of gnulib), and have a single way to get the name of the current program. A number of changes in tools mostly, although mechanical. Thanks, Pino Toscano (3): Update gnulib to latest

Cédric pointed out this problem we have: $ guestmount -a /var/lib/libvirt/images/sles12sp1-pv.img -m '/dev/sda1:/:subvol=.snapshots/2/snapshot:btrfs' /mnt libguestfs: error: mount_vfs: /dev/sda1 on / (options: 'subvol=.snapshots/2/snapshot'): mount: mount(2) failed: No such file or directory guestmount: '/dev/sda1' could not be mounted. guestmount: Check mount(8) man page

guestmount.c: In function 'main': guestmount.c:899: error: implicit declaration of function 'setlocale' [-Wimplicit-function-declaration] guestmount.c wasn't including locale.h. --- fuse/guestmount.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/fuse/guestmount.c b/fuse/guestmount.c index b4a917f..27a4cef 100644 --- a/fuse/guestmount.c +++

lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 14.04.3 LTS Release: 14.04 Codename: trusty guestmount --ro -a agent-disk1.vmdk -i /mnt/vmdk --> Works fine guestmount --rw -a agent-disk1.vmdk -i /mnt/vmdk libguestfs: error: appliance closed the connection unexpectedly. This usually means the libguestfs appliance crashed. See

Hi, I'm experiencing a weird behavior when tried to use guestmount with a XFS formatted volume. I have created a RHEL 8 virtual machine using libvirt. I have retrieved the disk image on a RHEL 7.7 server to mount the image root filesystem and explore it. The command returns an error message: # guestmount -a /disks/jamesdream.qcow2 -m /dev/sda1 /mnt/ libguestfs: error: mount_options: mount