/dev/lxc permissions issue with updated 0.5.1+bzr563-0juju2~precise1

[Serge E. Hallyn]

Quoting Andreas Hasenack (andreas at canonical.com):
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> On 10-08-2012 19:59, Serge E. Hallyn wrote:
> > This looks similar to the cause of bug 
> > (https://bugs.launchpad.net/ubuntu/+source/juju/+bug/930430) - lxc 
> > (in this case lxc-start, in 930430 lxc-create) does an mkdir,
> > passing in mode 0755, but the passed in mode is masked with a
> > tightened umask set by juju (or perhaps by you?  you might type
> > 'umask' in your shell to make sure).
> 
> My umask is fine:
> $ umask
> 0002
> 
> The only thing that changed between those juju runs was the version of
> juju itself:
> 0.5+bzr531-0ubuntu1.2: /dev/lxc is 0755 root:root
> 0.5.1+bzr563-0juju2~precise1: /dev/lxc is 0700 root:root
> 
> > Perhaps lxc should check its umask and spit out a warning...  I'd
> > be open to that.  Usually you want to say let the caller decide
> > these things, but in this case it always just breaks the guests.
> 
> That's open to discussion I guess, it depends if a 0700 /dev/lxc makes

It's not just /dev/lxc/.  Also everything else created by lxc - cgroups,
/var/lib/lxc/ directories, etc.

> sense or not, but at first I would like to understand what changed in
> juju (presumably) that made this break all of a sudden.
> 
> 
> - -- 
> Andreas Hasenack
> andreas at canonical.com
> 
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