Hi Rich, On Wed, November 16, 2016 1:34 pm, Richard W.M. Jones wrote:
On Wed, Nov 16, 2016 at 11:31:40AM -0500, Derek Atkins wrote:
Running `virt-v2v -v -x ...' and observing the output will give you a good idea of what precisely it was doing for those hours.
Well, as I said in my original email, it was hanging at running setfiles:
commandrvf: stdout=n stderr=y flags=0x0 commandrvf: setfiles -F -e /sysroot/dev -e /sysroot/proc -e /sysroot/selinux -e /sysroot/sys -r /sysroot -q /sysroot/etc/selinux/targeted/contexts/files/file_contexts /sysroot/ Can't stat exclude path "/sysroot/selinux", No such file or directory - ignoring.
OK that's interesting. setfiles is doing SELinux labelling of the filesystem. The time taken should be approximately proportional to the number of files in the filesystem.
What it precisely does is to run the host's /usr/sbin/setfiles command over the whole guest filesystem, using the guest's /etc/selinux/targeted/contexts/files/file_contexts to control the labelling. So if either of the guest filesystem or the guest's file_contexts is particularly large, or setfiles has a bug, then it might take a long time.
I suppose there could be a bug. I just verified that it's absolutely setfiles: 14:06:20 I: Started virt-v2v -v -x -i ova /ovirt/import/fc21-64.ova -of raw -o null 14:06:20 O: [ 0.0] Opening the source -i ova /ovirt/import/fc21-64.ova [snip] 14:07:25 E: libguestfs: trace: v2v: aug_get = "targeted" 14:07:25 E: libguestfs: trace: v2v: aug_close 14:07:25 E: guestfsd: main_loop: new request, len 0x28 14:07:25 E: guestfsd: main_loop: proc 26 (aug_close) took 0.03 seconds 14:07:25 E: libguestfs: trace: v2v: aug_close = 0 14:07:25 E: libguestfs: trace: v2v: selinux_relabel "/etc/selinux/targeted/contexts/files/file_contexts" "/" "force:true" 14:07:25 E: guestfsd: main_loop: new request, len 0x6c 14:07:25 E: commandrvf: stdout=n stderr=y flags=0x0 14:07:25 E: commandrvf: setfiles -F -e /sysroot/dev -e /sysroot/proc -e /sysroot/selinux -e /sysroot/sys -r /sysroot -q /sysroot/etc/selinux/targeted/contexts/files/file_contexts /sysroot/ 14:07:25 E: Can't stat exclude path "/sysroot/selinux", No such file or directory - ignoring. [ Spacing Emphasis Mine -- there is no break (except time) here ] 16:00:42 E: libguestfs: trace: v2v: selinux_relabel = 0 16:00:42 O: virt-v2v: This guest has virtio drivers installed. 16:00:42 E: libguestfs: trace: v2v: rm_f "/.autorelabel" 16:00:42 E: guestfsd: main_loop: proc 467 (selinux_relabel) took 6797.01 seconds 16:00:42 E: guestfsd: main_loop: new request, len 0x3c [SNIP] 16:01:13 I: Finished with exitcode 0 So it looks like it took almost two hours to run the setfiles on a 4GB filesystem. The rest of the import was only a minute or three. I'm happy to help debug this however I can in order to fix any potential bugs. However I admit it probably wont affect me any more -- I don't expect to migrate many more VMs. Still, I'm happy to work towards the common good. :)
Rich.
-- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into KVM guests. http://libguestfs.org/virt-v2v
-derek -- Derek Atkins 617-623-3745 derek@ihtfp.com www.ihtfp.com Computer and Internet Security Consultant