[Lxc-users] lxc-start: Device or resource busy - could not unmount old rootfs

Pier Fumagalli pier at betaversion.org
Tue Apr 13 23:04:03 UTC 2010 

It seems to me this is pretty much what I'm seeing too with 0.6.5.

http://www.mail-archive.com/lxc-users@lists.sourceforge.net/msg00029.html

In my case, I downgraded to 0.6.3 and it works just fine.

    Pier


On Wed, Apr 14, 2010 at 05:33, Matt Bailey <mbailey at system42.net> wrote:

> With lxc 0.6.5, I am having a problem starting a container.  Here is
> the debug output. (FWIW, my /var is a separate partition on the host)
>
> # lxc-start -n test -l DEBUG -o $(tty)
>      lxc-start 1271189821.303 INFO     lxc_conf - tty's configured
>      lxc-start 1271189821.303 DEBUG    lxc_start - sigchild handler set
>      lxc-start 1271189821.303 INFO     lxc_start - 'test' is initialized
>      lxc-start 1271189821.313 DEBUG    lxc_conf - instanciated veth
> 'veth5RnMGB/veth28579F', index is '14'
>      lxc-start 1271189821.394 DEBUG    lxc_cgroup - using cgroup
> mounted at '/cgroup'
>      lxc-start 1271189821.395 DEBUG    lxc_cgroup - '/cgroup/2229'
> renamed to '/cgroup/test'
>      lxc-start 1271189821.554 DEBUG    lxc_conf - move 'br0' to '2229'
>      lxc-start 1271189821.554 INFO     lxc_conf - 'test' hostname has
> been setup
>      lxc-start 1271189821.571 DEBUG    lxc_conf - 'eth0' has been setup
>      lxc-start 1271189821.571 INFO     lxc_conf - network has been setup
>      lxc-start 1271189821.571 DEBUG    lxc_cgroup - using cgroup
> mounted at '/cgroup'
>      lxc-start 1271189821.571 DEBUG    lxc_conf - cgroup
> 'devices.deny' set to 'a'
>      lxc-start 1271189821.572 DEBUG    lxc_conf - cgroup
> 'devices.allow' set to 'c 1:3 rwm'
>      lxc-start 1271189821.572 DEBUG    lxc_conf - cgroup
> 'devices.allow' set to 'c 1:5 rwm'
>      lxc-start 1271189821.572 DEBUG    lxc_conf - cgroup
> 'devices.allow' set to 'c 5:1 rwm'
>      lxc-start 1271189821.572 DEBUG    lxc_conf - cgroup
> 'devices.allow' set to 'c 5:0 rwm'
>      lxc-start 1271189821.572 DEBUG    lxc_conf - cgroup
> 'devices.allow' set to 'c 4:0 rwm'
>      lxc-start 1271189821.572 DEBUG    lxc_conf - cgroup
> 'devices.allow' set to 'c 4:1 rwm'
>      lxc-start 1271189821.572 DEBUG    lxc_conf - cgroup
> 'devices.allow' set to 'c 1:9 rwm'
>      lxc-start 1271189821.572 DEBUG    lxc_conf - cgroup
> 'devices.allow' set to 'c 1:8 rwm'
>      lxc-start 1271189821.572 DEBUG    lxc_conf - cgroup
> 'devices.allow' set to 'c 136:* rwm'
>      lxc-start 1271189821.572 DEBUG    lxc_conf - cgroup
> 'devices.allow' set to 'c 5:2 rwm'
>      lxc-start 1271189821.572 DEBUG    lxc_conf - cgroup
> 'devices.allow' set to 'c 254:0 rwm'
>      lxc-start 1271189821.572 INFO     lxc_conf - cgroup has been setup
>      lxc-start 1271189821.572 INFO     lxc_conf - mount points have been
> setup
>      lxc-start 1271189821.572 INFO     lxc_conf - console
> '/dev/pts/0' mounted to '/var/lib/urizen-slicer/fs/test/dev/console'
>      lxc-start 1271189821.572 INFO     lxc_conf - 4 tty(s) has been setup
>      lxc-start 1271189821.572 DEBUG    lxc_conf - temporary
> mountpoint for old rootfs is './lxc-oldrootfs-y10fSV'
>      lxc-start 1271189821.572 DEBUG    lxc_conf - pivot_root syscall
> to '/lxc-oldrootfs-y10fSV' successful
>      lxc-start 1271189821.573 DEBUG    lxc_conf - umounted
> '/lxc-oldrootfs-y10fSV/dev/pts'
>      lxc-start 1271189821.573 DEBUG    lxc_conf - umounted
> '/lxc-oldrootfs-y10fSV/dev/shm'
>      lxc-start 1271189821.573 DEBUG    lxc_conf - umounted
> '/lxc-oldrootfs-y10fSV/sys/fs/fuse/connections'
>      lxc-start 1271189821.573 DEBUG    lxc_conf - umounted
> '/lxc-oldrootfs-y10fSV/sys/kernel/debug'
>      lxc-start 1271189821.573 DEBUG    lxc_conf - umounted
> '/lxc-oldrootfs-y10fSV/sys/kernel/security'
>      lxc-start 1271189821.573 DEBUG    lxc_conf - umounted
> '/lxc-oldrootfs-y10fSV/proc'
>      lxc-start 1271189821.573 DEBUG    lxc_conf - umounted
> '/lxc-oldrootfs-y10fSV/var/run'
>      lxc-start 1271189821.573 DEBUG    lxc_conf - umounted
> '/lxc-oldrootfs-y10fSV/var/lock'
>      lxc-start 1271189821.573 DEBUG    lxc_conf - umounted
> '/lxc-oldrootfs-y10fSV/lib/init/rw'
>      lxc-start 1271189821.573 DEBUG    lxc_conf - umounted
> '/lxc-oldrootfs-y10fSV/cgroup'
>      lxc-start 1271189821.573 DEBUG    lxc_conf - umounted
> '/lxc-oldrootfs-y10fSV/var/lib/urizen-slicer/fs/test/dev/console'
>      lxc-start 1271189821.573 DEBUG    lxc_conf - umounted
> '/lxc-oldrootfs-y10fSV/var/lib/urizen-slicer/fs/test/dev/tty1'
>      lxc-start 1271189821.573 DEBUG    lxc_conf - umounted
> '/lxc-oldrootfs-y10fSV/var/lib/urizen-slicer/fs/test/dev/tty2'
>      lxc-start 1271189821.573 DEBUG    lxc_conf - umounted
> '/lxc-oldrootfs-y10fSV/var/lib/urizen-slicer/fs/test/dev/tty3'
>      lxc-start 1271189821.573 DEBUG    lxc_conf - umounted
> '/lxc-oldrootfs-y10fSV/var/lib/urizen-slicer/fs/test/dev/tty4'
>      lxc-start 1271189821.573 DEBUG    lxc_conf - umounted
> '/lxc-oldrootfs-y10fSV/dev'
>      lxc-start 1271189821.573 DEBUG    lxc_conf - umounted
> '/lxc-oldrootfs-y10fSV/sys'
>      lxc-start 1271189821.573 DEBUG    lxc_conf - umounted
> '/lxc-oldrootfs-y10fSV/var'
>      lxc-start 1271189821.573 ERROR    lxc_conf - Device or resource
> busy - could not unmount old rootfs
> lxc-start: Device or resource busy - could not unmount old rootfs
>      lxc-start 1271189821.573 ERROR    lxc_conf - failed to
> pivot_root to '/var/lib/urizen-slicer/fs/test'
> lxc-start: failed to pivot_root to '/var/lib/urizen-slicer/fs/test'
>      lxc-start 1271189821.573 ERROR    lxc_conf - failed to set
> rootfs for 'test'
> lxc-start: failed to set rootfs for 'test'
>      lxc-start 1271189821.573 ERROR    lxc_start - failed to setup
> the container
> lxc-start: failed to setup the container
>      lxc-start 1271189821.573 NOTICE   lxc_start - '/sbin/init'
> started with pid '2229'
>      lxc-start 1271189821.573 DEBUG    lxc_utils - closing fd '1'
>      lxc-start 1271189821.573 DEBUG    lxc_utils - closing fd '0'
>      lxc-start 1271189821.573 DEBUG    lxc_utils - closed all
> inherited file descriptors
>      lxc-start 1271189821.634 DEBUG    lxc_start - child exited
>      lxc-start 1271189821.634 INFO     lxc_error - child <2229> ended
> on error (255)
>      lxc-start 1271189821.634 DEBUG    lxc_cgroup - using cgroup
> mounted at '/cgroup'
>      lxc-start 1271189821.714 DEBUG    lxc_cgroup - '/cgroup/test' unlinked
>
>
> Thanks,
> --
> Matt Bailey
>
>
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