similar to: Breaking a virtlockd lock?

Hi all, Trying to test libvirt 1.1.3 with virtlockd locking my qcow2 images on a NFS storage between two kvm hosts. ./configure ... --with-init-script=upstart Libvirtd upstart script is actually well generated but I can't see nothing about virtlockd... or am I blind ? :) Nevertheless, running virtlockd -d && service libvirtd restart works fine. Am I wrong thinking that editing

Hi list, I would like to ask a clarification about how locking works. My test system is CentOS 7.7 with libvirt-4.5.0-23.el7_7.1.x86_64 Is was understanding that, by default, libvirt does not use any locks. From here [1]: "The out of the box configuration, however, currently uses the nop lock manager plugin". As "lock_manager" is commented in my qemu.conf file, I was

Hi Eric, Here is my try to write a quick upstart script for virtlockd. It should be named /etc/init/virtlockd.conf, then : ln -s /lib/init/upstart-job /etc/init.d/virtlockd It seems to work for me : # virtlockd - Locking daemon for libvirt description "virtlockd" start on filesystem and runlevel [2345] stop on starting rc RUNLEVEL=[016] pre-start script test -x

On Sat, Dec 28, 2019 at 02:36:27PM +0100, Gionatan Danti wrote: > Il 28-12-2019 01:39 Gionatan Danti ha scritto: > > Hi list, > > I would like to ask a clarification about how locking works. My test > > system is CentOS 7.7 with libvirt-4.5.0-23.el7_7.1.x86_64 > > > > Is was understanding that, by default, libvirt does not use any locks. > > From here [1]:

Il 28-12-2019 01:39 Gionatan Danti ha scritto: > Hi list, > I would like to ask a clarification about how locking works. My test > system is CentOS 7.7 with libvirt-4.5.0-23.el7_7.1.x86_64 > > Is was understanding that, by default, libvirt does not use any locks. > From here [1]: "The out of the box configuration, however, currently > uses the nop lock manager

Hello! Is it possible to disable the virtlockd daemon or VM file locking? I start qemu with a -snapshot option which prevents and changes to the disk image anyways. Using <readonly /> is not supported for IDE disks. Another option would be to not require locking on the NFS share, but i have no idea how. Can someone help me with that? Regards Felix Queißner

On 10/11/2013 03:25 AM, NEVEU Stephane wrote: > Hi all, > > Trying to test libvirt 1.1.3 with virtlockd locking my qcow2 images on a NFS storage between two kvm hosts. > ./configure ... --with-init-script=upstart > > Libvirtd upstart script is actually well generated but I can't see nothing about virtlockd... or am I blind ? :) It looks like virtlockd was added after

We're having a problem that is the reverse of prblems that others have had: if we have a file open in Visual C++, and change it from another editor (either on the PC or on Unix), Visual C++ does not notice that it has been changed and ignores the file when it does a make. If the file is on a local drive, everything works fine. We're running Samba version 2.0.4b on Solaris 2.6 and Visual

Hi, I've read in the documentation that virtlockd uses SIGUSR1 to dump its state and then re-execs itself. Now I tried it and this seems to fail because virtlockd is being launched without a full path (when using the init script), thus re-exec fails with the error: error : virLockDaemonPreExecRestart:1092 : Unable to restart self: No such file or directory Changing in the init script

On Mon, Jun 08, 2020 at 16:26:44 +0200, Felix Queißner wrote: > Hello! Hi, > > Is it possible to disable the virtlockd daemon Yes. via the 'lock_manager' option in /etc/libvirt/qemu.conf >or VM file locking? I If you mean the image locking provided by qemu, then no, libvirt doesn't have provisions to disable it. > start qemu with a -snapshot option which prevents

I have three machines running libvirt under Scientific Linux (RHEL derivative) version 6. The virtual machine disk images are running SL 5 and 6, are all stored on NFS, and I can do live migrations with virsh migrate --live guestname qemu+ssh://vmhostname.math.cornell.edu/system Trouble is, within a day or two after the migration, the guest hangs up with repeated DriveReady errors and has to

On Fri, Jan 03, 2020 at 02:56:50PM +0100, Gionatan Danti wrote: > Il 03-01-2020 11:26 Daniel P. Berrangé ha scritto: > > virtlockd also uses fcntl(), however, it doesn't have to acquire locks > > on > > the file/block device directly. It can use a look-aside file for > > locking. > > For example a path under /var/lib/libvirt/lock. This means that locks on >

Hello. I'm playing with libgfapi network disks, over IB and all is working fine, but not disk locking (and true rdma transport). I use virtlockd, and with fuse mount, locking works as expected. But when i converted disk definitions to libgfapi, locks are not created (but qemu starts and works fine). I used direct and indirect locking - same result : qemu working fine, no locks. my

Il 06-01-2020 10:06 Peter Krempa ha scritto: > On Fri, Jan 03, 2020 at 14:08:03 +0000, Daniel Berrange wrote: >> As above, QEMU's locking is good enough to rely on for file based >> images. Hi Daniel, thank you for the direct confirmation. >> The flaws I mention with libvirt might actually finally be something >> we >> have fixed in 5.10.0 with QEMU 4.2.0,

[moderator note: .pngs were stripped to avoid overwhelming the mail server and list recipients with 1M of data] -------- Forwarded Message -------- Date: Wed, 30 Mar 2016 11:25:09 +0200 Message-ID: <20160330112509.Horde.0Oad-ZfkzdZnouXf-VkEmw1@webmailperso.univ-brest.fr> From: villeneu@kassis.univ-brest.fr To: Franky Van Liedekerke <liedekef@telenet.be> Cc: libvirt-users@redhat.com

Dear All, I am trying to use VM (disk) locking on a two node Centos 7 KVM cluster. Unfortunately, I am not successful. Using virtlockd (https://libvirt.org/locking-lockd.html), I get each host to write the zero length file with a hashed filename to the shared folder specified. Regardless of which host I start a VM (domain) on, they do produce the identical filename per VM. What does not work,

On Thu, Mar 31, 2016 at 12:05:07PM +0200, villeneu@kassis.univ-brest.fr wrote: > Hello > > I use lock_manager with libvirt 1.3 and > I would like to know how is exactly calculate the hash SHA256. I would > create a table > to retreive the name with the hash in case of crash to release manualy the > lock. Do you mean in the case of a host crash, and if so what filesystem ?

Up. Any ideas ? Thank you De : NEVEU Stephane Envoyé : lundi 14 octobre 2013 10:46 À : libvirt-users@redhat.com Objet : migrate & virtlockd Hi all, I'm testing virtlockd with libvirt 1.1.3 and it seems I can't migrate my VMs from the first to my second kvm node (on a NFS storage). Virtlockd is locking my qcow2 : Error : resource busy Lockspace resource 'ea3jkj78.....' is