similar to: KVM -snapshot mode

On 03/17/2014 11:51 AM, chris 0 wrote: > Hi, > > I'm just wondering is there any way for me to trigger KVM's > -snapshot parameter from libvirt. We do NOT want to expose qemu's -snapshot parameter directly via libvirt, for several reasons: 1. it makes qemu use $TMPDIR, and on systems where $TMPDIR defaults to /tmp and where /tmp is not backed by disk, it can easily

I notice that the qemu driver doesn't support snapshot drives (-drive file=foo,snapshot=on). This is important for libguestfs. Currently libguestfs hacks this using <qemu:arg>. That works fine for static disks in the libvirt XML, but lack of direct support in libvirt is a blocker for adding hotplugging to libguestfs. In qemu, the snapshot=on feature does several things: (a) It

hi,all a qemu-kvm process and its disk(image file) have the same MCS(s0:c111,c555). it express this process have access to this image. i do not know the power to access its image file is the max or min? if any other power this process(domain) has?how much? i want to know the exact power a qemu-kvm process has besides access its image file ,other kinds of files,dirs etc. my test case:

Link to version 1: https://www.redhat.com/archives/libguestfs/2013-February/thread.html#00122 Changes since version 1: - I've pushed two (of the three) code refactoring patches. The third one proved rather hard to move. - selinuxnorelabel option is no more. Instead there is a second internal API (internal_set_libvirt_selinux_norelabel_disks). - fixed bogus commit message -

Hi, all. I noticed recently that llvm::sys::fs::createTemporaryFile does not use llvm::sys::path::system_temp_directory, instead relying on its platform-specific helper TempFile. Is there any reason for this disparity? The two implementations are not in sync, either: - TempDir honors TMPDIR, TMP, TEMP, TEMPDIR, and a configuration-settable P_tmpdir on Unix-y systems. system_temp_directory just

https://bugzilla.redhat.com/show_bug.cgi?id=912499 (especially comments 7 & 10) This patch set is the final fix so that we can access disks in use by other guests when SELinux and sVirt are enabled. Previously such disks were inaccessible because sVirt labels the disks with a random SELinux label to prevent other instances of qemu from being able to read them. So naturally the libguestfs

Hi Libvirt team, I am trying to create a new domain from XML file by using libvirt. I want this new domain using non-persistent disk as its disk. Non-persistent disk means that when the domain is running, all the modification would not be written to disk file. So next time, when you boot VM from the same disk file, you would have a fresh disk. I check the website but I could not find

On 04/03/2013 10:25 AM, yue wrote: > > hi,all > > i know svirt is merged into libvirt upstream, but how to use them? > You had better to ask this kind of question to libvirt-users at redhat.com in the future, it's a user mail listing, you may ask all kind of libvirt usage questions if you want, the following is some reference:

libvirt doesn't have a concept of "session qemu" for root: https://bugzilla.redhat.com/show_bug.cgi?id=890291 When a libguestfs-using process runs as root, and libvirt runs a qemu subprocess, the qemu subprocess is run as a non-root user (typically qemu.qemu). This causes various problems, for example if we try to open a file which is readable by root but unreadable by qemu.qemu

Hello, I tried to install guestfish on my Fedora 29 and used the commands from documentation sudo dnf install libguestfs-tools but I got an error when I tried to execute run. You will find below logs below: ************************************************************ * IMPORTANT NOTICE * * When reporting bugs, include the COMPLETE, UNEDITED * output

Am 10.06.13 09:07, schrieb Kashyap Chamarthy: > On 06/09/2013 02:46 PM, Thomas Stein wrote: >> Hello. >> >> I just tried the following: >> >> virsh dumpxml --security-info gentoo-template > gentoo-template.xml >> virsh snapshot-create gentoo-template >> virsh undefine gentoo-template > > Wait - is that really the command you used after

Am 10.06.13 10:40, schrieb Kashyap Chamarthy: > On 06/10/2013 01:20 PM, Thomas Stein wrote: >> Am 10.06.13 09:07, schrieb Kashyap Chamarthy: >>> On 06/09/2013 02:46 PM, Thomas Stein wrote: >>>> Hello. >>>> >>>> I just tried the following: >>>> >>>> virsh dumpxml --security-info gentoo-template > gentoo-template.xml

?Hi, ?I've installed libvirt-0.9.13 on RHEL6.2 from the source code. I cannot make sVirt working with LXC. (sVirt works well with KVM, though.) I can start an LXC instance, but the label of the process is not right. Can someone help me? I tried to change /etc/libvirtd/lxc.conf file to explicitly enable security_driver = "selinux". But it ends up with error saying "error :

QEMU upstream has broken snapshot=on ... again. These two patches stop using it entirely. Instead we run 'qemu-img create' to create overlay disks as required. Note that the libvirt and UML backends were already doing this: The libvirt backend because <transient/> has never worked, and the UML backend was running uml_mkcow because the UML-equivalent syntax of snapshot=on was

Hello, I have a simple C program that uses libguestfs to extract info about disk usage from a libvirt domain. It works when ran manually as root, but fails when started as a systemd service. I'm attaching the service file, source code and verbose logs from both the successful manual run and from the service journal. SELinix is disabled. Error messages: libguestfs:

Error out early if the path to the socket will not fit into sockaddr_un::sun_path, as we will not be able to connect to it. --- src/launch-unix.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/launch-unix.c b/src/launch-unix.c index 740c554..973e14b 100644 --- a/src/launch-unix.c +++ b/src/launch-unix.c @@ -47,6 +47,12 @@ launch_unix (guestfs_h *g, void *datav, const char

> Your quoting is horrible. You used the same prefix for your original > content as for my reply (">> >" in both cases). I'm not sure what > mailer you are using, but it is making conversation difficult. OK, let's see if this is better. Turned out my email app wasn't doing text wrap and quoting prefix default was bizarre....my apologies. > > >

Thank you Eric, On 2014-02-05 17:23, Eric Blake wrote: > Yes, live storage migration is possible; although at the moment, qemu is > lacking a way to restart the operation if it fails midstream, so libvirt > only allows the operation if you are willing to temporarily make your > guest transient. What does this mean? Will I loose anything if - for example - there is not enough space on

Hi there, Do you know if there is a way to modify how libvirt interacts with the cgroup? Because, I successfully add the /dev/net/tun support in my LXC container by doing: echo c 10:200 rwm >> /cgroup/libvirt/lxc/instance-00000005/devices.allow But when I restart the instance/LXC container, this option has gone. How can I make this persistant? Is there a configuration file? Thanks

I have an older quad-core AMD processor that supports hardware virtualization on a motherboard that does not support it in the bios. Eventually I'll swap the mobo out on this box for one that will support hardware virtualization and use qemu-kvm. I prefer kvm because of SELinux and sVirt that protects the host from VM breakout should a VM become hostile. In the meantime, I want to start work