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

[Matt Bailey]

Thanks for taking the time to check this out; I'll pull from git
tomorrow and start using it.
--
Matt Bailey
303.871.4923
Senior Software Specialist
University of Denver, UTS
http://du.edu
http://system42.net



On Wed, Apr 14, 2010 at 10:09 PM, Serge E. Hallyn <serue at us.ibm.com> wrote:
> Quoting Pier Fumagalli (pier at betaversion.org):
>> On Thu, Apr 15, 2010 at 01:39, Matt Bailey <mbailey at system42.net> wrote:
>>
>> Those are also the instructions I followed.  The only difference I can
>> > see is that I have a separate volume for /var on my host.
>> >
>>
>> Oh, interesting: I too have a separate partition for /var/ .... Sorry for
>> not reporting this at first!
>>
>>     Pier
>
> [ summary: lxc git fixes this ]
>
> Heh, all right, I was able to reproduce after create a new VM with /var
> on separate partition.  (was delayed bc there is a bug in kvm or lucid
> installer causing install to die if /var is on separate disk!)
>
> strace -f -o/tmp/ab lxc-start -n lucid1 shows umount(/) is returning
> -EBUSY.  Which actually doesn't make a lot of sense bc /var *was*
> successfully unmounted.  But in any case as Brian White was saying,
> commit c08556c6ece8ad8308f7636adb0ad25b60e3a16d in lxc git, which is
> not in 0.6.5, is the one making it use MNT_DETACH.
>
> And, in fact, installing lxc from git lets the same container succeed
> on the host where it fails with lxc 0.6.5.
>
> So looks like beside downgrading you also have the option of upgrading :)
>
> -serge
>