On Thu, Nov 23, 2017 at 4:05 PM, Richard W.M. Jones <rjones@redhat.com> wrote:
On Thu, Nov 23, 2017 at 10:57 AM, Richard W.M. Jones <rjones@redhat.com> wrote:
On Tue, Nov 21, 2017 at 11:43:54PM +0200, Yaniv Kaul wrote:
Since I upgrading to FC27, I *sometimes* fail to virt-sysprep. The debug messages: libguestfs: trace: set_verbose true libguestfs: trace: set_verbose = 0 libguestfs: create: flags = 0, handle = 0x7f4600005dd0, program =
On Thu, Nov 23, 2017 at 03:00:45PM +0200, Yaniv Kaul wrote: python2
libguestfs: trace: set_program "lago" libguestfs: trace: set_program = 0 libguestfs: trace: add_drive_ro "/home/ykaul/ovirt-system-tests/deployment-basic-suite- master/default/images/lago-basic-suite-master-host-0_root.qcow2" libguestfs: trace: add_drive "/home/ykaul/ovirt-system-tests/deployment-basic-suite- master/default/images/lago-basic-suite-master-host-0_root.qcow2" "readonly:true" libguestfs: creating COW overlay to protect original drive content libguestfs: trace: disk_format "/home/ykaul/ovirt-system-tests/deployment-basic-suite- master/default/images/lago-basic-suite-master-host-0_root.qcow2" libguestfs: command: run: qemu-img libguestfs: command: run: \ info libguestfs: command: run: \ --output json libguestfs: command: run: \ /dev/fd/7 qemu-img: Could not open '/dev/fd/7': Failed to get shared "write" lock Is another process using the image?
Looking at this a bit closer, I think this may be a bug in qemu.
/dev/fd/7 is supposed to be the file descriptor of the image which we have opened in libguestfs, see this code:
https://github.com/libguestfs/libguestfs/blob/ 06df910491c49360c0292c7153ba5e5cd09a4735/lib/info.c#L174-L191
I wonder if qemu gets confused by this and thinks that the image is open in two places?
I can't reproduce this here however. Having a nice short reproducer might help.
It's not reliably reproduced on my setup either. I run Lago (http://lago.readthedocs.io/en/latest/) which is virt-sysprep'ing several VMs (using direct backend, but they were brought up via libvirt - is that an issue?). I don't recall seeing it before upgrading to FC27... Y.
Rich.
-- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~ rjones Read my programming and virtualization blog: http://rwmj.wordpress.com Fedora Windows cross-compiler. Compile Windows programs, test, and build Windows installers. Over 100 libraries supported. http://fedoraproject.org/wiki/MinGW