I did add a sync to the following file
/usr/lib/python2.6/dist-packages/VMBuilder/disk.py
Here
def umount(self):
self.vm.cancel_cleanup(self.umount)
if (self.type != TYPE_SWAP) and not self.dummy:
logging.debug('Syncing')
run_cmd('sync')
logging.debug('Unmounting %s', self.mntpath)
run_cmd('umount', self.mntpath)
But there is a umount happening before that function is called.
I ran vmbuilder in debug mode and here are the pertinent messages:
===================
2009-12-23 09:18:43,386 DEBUG : Reading package lists...
2009-12-23 09:18:43,386 DEBUG : cleaning apt
2009-12-23 09:18:43,386 DEBUG : ['chroot',
'/home/ubuntu/Data/tmp/vmbuilderYt3CgM/root', 'apt-get', 'clean']
2009-12-23 09:18:43,613 DEBUG : Unmounting volatile lrm filesystems
2009-12-23 09:18:43,614 DEBUG : Unbinding /dev and /proc filesystems
2009-12-23 09:24:43,714 DEBUG : ['umount',
'/home/ubuntu/Data/tmp/vmbuilderYt3CgM/root/dev/pts']
2009-12-23 09:24:43,718 DEBUG : ['umount',
'/home/ubuntu/Data/tmp/vmbuilderYt3CgM/root/dev']
2009-12-23 09:24:43,723 DEBUG : ['umount',
'/home/ubuntu/Data/tmp/vmbuilderYt3CgM/root/proc']
2009-12-23 09:24:43,727 INFO : umount:
/home/ubuntu/Data/tmp/vmbuilderYt3CgM/root/proc: device is busy.
2009-12-23 09:24:43,728 INFO : (In some cases useful info about
processes that use
2009-12-23 09:24:43,729 INFO : the device is found by lsof(8) or
fuser(1))
2009-12-23 09:24:43,729 DEBUG : Oh, dear, an exception occurred
2009-12-23 09:24:43,729 INFO : Cleaning up
2009-12-23 09:24:43,729 DEBUG : ['umount',
'/home/ubuntu/Data/tmp/vmbuilderYt3CgM/root/proc']
2009-12-23 09:24:43,733 DEBUG : umount:
/home/ubuntu/Data/tmp/vmbuilderYt3CgM/root/proc: device is busy.
2009-12-23 09:24:43,734 DEBUG : (In some cases useful info about
processes that use
2009-12-23 09:24:43,734 DEBUG : the device is found by lsof(8) or
fuser(1))
2009-12-23 09:24:43,734 DEBUG : ['umount',
'/home/ubuntu/Data/tmp/vmbuilderYt3CgM/root/dev/pts']
2009-12-23 09:24:43,739 DEBUG : umount:
/home/ubuntu/Data/tmp/vmbuilderYt3CgM/root/dev/pts: not mounted
2009-12-23 09:24:43,739 DEBUG : ['umount',
'/home/ubuntu/Data/tmp/vmbuilderYt3CgM/root/dev']
2009-12-23 09:24:43,744 DEBUG : umount:
/home/ubuntu/Data/tmp/vmbuilderYt3CgM/root/dev: not mounted
2009-12-23 09:24:43,744 DEBUG : Syncing
2009-12-23 09:24:43,744 DEBUG : ['sync']
2009-12-23 09:24:43,793 DEBUG : Unmounting
/home/ubuntu/Data/tmp/vmbuilderYt3CgM/target/
2009-12-23 09:24:43,794 DEBUG : ['umount',
'/home/ubuntu/Data/tmp/vmbuilderYt3CgM/target/']
2009-12-23 09:24:46,803 DEBUG : ['kpartx', '-d',
'/home/ubuntu/Data/tmp/vmbuilderYt3CgM/disk0.img']
2009-12-23 09:24:46,813 DEBUG : loop deleted : /dev/loop2
2009-12-23 09:24:46,813 DEBUG : ['kpartx', '-d',
'/home/ubuntu/Data/tmp/vmbuilderYt3CgM/disk0.img']
2009-12-23 09:24:46,819 DEBUG : ['rmdir', 'kvm-test-desktop3']
2009-12-23 09:24:46,822 DEBUG : ['rm', '-rf',
'/home/ubuntu/Data/tmp/vmbuilderYt3CgM']
2009-12-23 09:24:46,885 INFO : rm: cannot remove
`/home/ubuntu/Data/tmp/vmbuilderYt3CgM/root/proc/dri/0/vma': Operation not
permitted
2009-12-23 09:24:46,886 INFO : rm: cannot remove
`/home/ubuntu/Data/tmp/vmbuilderYt3CgM/root/proc/dri/0/bufs': Operation not
permitted
.
.
.
===================
So, as suggested, I did run lsof:
$ sudo lsof -R /home/ubuntu/Data/tmp/vmbuilderYt3CgM/root/proc
COMMAND PID PPID USER FD TYPE DEVICE SIZE/OFF NODE NAME
dd 808 1 root 0r REG 0,3 0 4026531987 /proc/kmsg
lsof 21109 31948 root 3r DIR 0,3 0 1 /proc
lsof 21109 31948 root 6r DIR 0,3 0 1176729 /proc/21109/fd
So dd (with init as parent) is to blame.
Then:
$ ps ax | grep -w dd
4 0 808 1 20 0 8192 604 syslog Ss ? 0:00 dd bs=1
if=/proc/kmsg of=/var/run/rsyslog/kmsg
Kernel messages appear to not have finished flushing to disk.
I decided to try a sleep in this file
/usr/lib/python2.6/dist-packages/VMBuilder/plugins/ubuntu/dapper.py
Here
def unmount_dev_proc(self):
import time
time.sleep(360)
run_cmd('umount', '%s/dev/pts' % self.destdir)
run_cmd('umount', '%s/dev' % self.destdir)
run_cmd('umount', '%s/proc' % self.destdir)
But this did not help.
--
vmbuilder fails when adding package 'ubuntu-desktop'
https://bugs.launchpad.net/bugs/497258
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