similar to: can I undo the snapshot apply of a qcow2 image

Hi all I have a problem when I use `virsh attach` to attach a qcow2 disk to vm without argument --subdirver=qcow2 and this makes the qcow2 disk become a raw format disk, and the data in this disk is missing in guest os and also I have used guestmout to confirm this, the same result. Is there any way to let me find back the data in this disk ? the version of libvirt and kvm is : Compiled

After snapshot-delete, the qcow2 image file size doesn't decrease, isn't that a waste of disk space? Would someone please tell me how to decrease the file size when snapshot-delete, if that's possible? The image file name of my virtual machine is d0.qcow As follows: [root at test1 ]# virsh list Id Name State

Hi, After upgrading to libvirt 0.8.1, I can no longer create empty volumes with no backing store and an explicit format of qcow2. This XML volume definition: <volume> <name>testserverb-data2.img</name> <allocation>0</allocation> <capacity units='G'>20</capacity> <target> <format type='qcow2'/>

Hi I have two node: hcg3, hcg4 which run glusterfs Also run libvirtd on each node. The problem cames when I use `virsh attach-device` to attach a glusterfs type disk . My device xml like: <disk type="network" device="disk"> <driver name="qemu" type="raw" cache="none"/> <source protocol="gluster"

On 12/09/2013 09:03 PM, lyz_pro@163.com wrote: > Hi all > > I have a problem when I use `virsh attach` to attach a qcow2 disk to vm without argument --subdirver=qcow2 > and this makes the qcow2 disk become a raw format disk, and the data in this disk is missing in guest os > and also I have used guestmout to confirm this, the same result. The format of a file is important. By

Hey guys, i hope someone has an idea for me. At this time im using Puppet Dashboard as enc for a masterless puppet infrastructure.No im searching for a best practise to undo the changes from a removed class. Example: In the enc I´ve added the class auth::test to a node. The class will be loaded on the next puppet apply, works fine. But now if i remove the class from the node in the enc, how

Hi， I used 'virsh snapshot-create' create an encrypted external snapshot, when I try to use 'qemu-img check' top file, found no entrance to pass backing-file's secret-id 1、Version centos-release-8.2-2.2004.0.1.el8.x86_64 libvirt.x86_64 6.0.0-17.el8 qemu-kvm.x86_64

I need to implement multiple undo functionality into a Rails app (my first one). Essentially, every .update and .save needs to record the previous data set and save them in a history table along with some identifying stamps, so each db action can be rolled back at any time. From what i can tell, i could implement this manually using observers perhaps; but this is Rails, so i wonder if

Hello, I recently compiled libvirt 1.0.1 and qemu 1.3.0 on Ubuntu 12.04. I have performed live snapshots on VMs using "virsh snapshot-create-as" and then later re-merge the images together using "virsh blockpull". I am wondering how I can do a couple of other operations on the images while the VM is running. For example, VM1 is running from the snap3 image, with the following

Hi, In most cases we use image files as virtual disks under the full-virtualization situation.On the version 4.1.2 of xen,I do the following command: ############################################################ dd if=/dev/zero of=myraw.img bs=1M seek=8K count=1 #Before the command below I install the operating system in myraw.img qemu-img-xen create -b myraw.img -f qcow2 myqcow1.img 20000M

Il 19-06-2018 22:16 Cole Robinson ha scritto: > Sorry, I misunderstood. You can still achieve what you want but it's > more clicks: new vm, manage storage, add volume, and select raw volume > with whatever capacity you want but with 0 allocation. Sure, but the automatic disk creation is very handy and much less error prone. As it is now, if using a fallocate-less filesystem (eg:

Il 19-06-2018 20:14 Cole Robinson ha scritto: > If you change the disk image format from qcow2 to raw in > Edit->Preferences, then new disk images are set to fully allocated raw. > Check the image details with 'qemu-img info $filename' to confirm. So I > think by default we are doing what you want? > > - Cole Er, the point is that I would really like to have a

On 04/26/2016 09:35 AM, Shahar Havivi wrote: > On 26.04.16 15:30, Shahar Havivi wrote: >> On 26.04.16 14:14, Shahar Havivi wrote: >>> On 25.04.16 09:11, Cole Robinson wrote: >>>> On 04/25/2016 08:10 AM, Shahar Havivi wrote: >>>>> On 17.04.16 15:41, Shahar Havivi wrote: >>>>>> Hi, >>>>>> The following snippet works

Assuming the VM is not running, and we have a base (raw, sparse) with a snapshot (qcow2) on top of it. Is there any issue with running virt-sparsify on the base image? I assume deleted blocks in the base can be sparsified, since they are either still deleted on the snap (which is fine) or were written in the snap (which is fine either and does not change or matter for the base image). Can I assume

Hi all, When I live migrate a vm using "migrate --live --copy-storage-all mig-vm qemu+ssh://192.168.1.3/system tcp://192.168.1.3" I got the following error WARNING: Image format was not specified for 'nbd://node2:49155/drive-virtio-disk0' and probing guessed raw. 258 Automatically detecting the format is dangerous for raw images, write operations on

hi,all images of qcow2 format with backing files, its backing files have two path infos (absolute path and relative path) ,how to let libguestfs use absolute path rather than relative path. in some case, this leads error. thanks

Hi everyone I have a problem when use libvirt and glusterfs. When I use libvirt to start a vm with glusterfs disk. the operation will block. after I `CTL + c` the 'virsh start domainxx' comand , I use `virsh list` will find the vm in a strange state, kind like follow: Id Name State ---------------------------------------------------- 20 vm10

Hi users. I'm new user in R. I'm workiing with Time series and I would like to know how can I do to undo the command DIFF(X), for exemple: If I have the model: m=arima(X, order=c(0,1,1), seasonal=list(order=c(0,0,1))) (note that have d=1 one difference), to find, in the same scale, the original numbers (like one "unDiff"), after the forecast, I need to develop some function or in

Hi, all My xml 'dom1.xml' is as following: <domain type='kvm' id='1'> <name>kvm-xp</name> <description>xp kvm</description> <memory>524288</memory> <currentMemory>524288</currentMemory> <os> <type>hvm</type> <!--loader>/usr/lib/xen/boot/hvmloader</loader--> <boot dev="hd"/>

Hi all, We have done several speed tests on a qcow2 Linux Image to test how fast tar-in with a big tarball can be. Virtio seems to be active, and we get transfers in a range from 100-160MB/sec, independent of the disk speed on the host. For example we had a 20 core host system with 900MB for serial writing and 350MB for mixed read/write on the native filesystem. We've expected a faster