Comment 11 for bug 620027

This may be an unrelated problem, but there is a particularly nasty issue
with LVM interacting with AoE. The various LV commands will hang trying to
stat orphaned aoe devices. And they hang badly in a system call and can't
be killed. The best solution is to add something to LVM config so it
doesn't try to stat the aoe devices. My Filter looks like so in
/etc/lvm/lvm.conf:

    filter = [ "r|/dev/etherd/.*|", "r|/dev/block/.*|", "a/.*/" ]

On Thu, Aug 19, 2010 at 9:29 AM, Armando Migliaccio <
<email address hidden>> wrote:

> by the way, with your changes I can see in the log that the pvcreate
> call fails in the "if it already exists" case, but that (as you pointed
> out) is not the problem here. It's just this oddity about the daemon
> mode, which might potentially affect every other service!
>
> --
> vgcreate/lvcreate in volume/service.py fail and go undetected
> https://bugs.launchpad.net/bugs/620027
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>
> Status in OpenStack Compute (Nova): New
>
> Bug description:
> I noticed that service.py under nova/volume contains this flag:
>
> flags.DEFINE_string('storage_dev', '/dev/sdb', 'Physical device to use for
> volumes')
>
> my host does not have a /dev/sdb, so vgcreate in _init_volume_group(self)
> fails and consequently lvcreate in _create_lv fails too. It seems that no
> exeption is reported in the log file. Shouldn't storage_dev be /dev/loop0 or
> any other free loop device chosen by losetup passed by $NOVA_VOLUME_ARGS?
>
> Thanks,
> Armando
>
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