Comment 4 for bug 1735780

(10:08:04 AM) mriedem: lyarwood: https://bugs.launchpad.net/nova/+bug/1735780
(10:08:06 AM) openstack: Launchpad bug 1735780 in OpenStack Compute (nova) "n-cpu logs error "is not a valid LUKS device"" [Undecided,Confirmed]
(10:08:10 AM) mriedem: http://logs.openstack.org/26/515426/1/check/legacy-tempest-dsvm-neutron-full/e6ac116/logs/screen-n-cpu.txt.gz#_Dec_01_14_06_49_142977
(10:17:18 AM) lyarwood: mriedem: looking
(10:19:08 AM) lyarwood: mriedem: so that's normal, search for cryptsetup below that and you can see we format and then open it correctly
(10:19:27 AM) mriedem: lyarwood: :(
(10:19:36 AM) mriedem: i guess that's why it's a stacktrace at debug rather than error?
(10:19:45 AM) mriedem: which is i think a thing i've seen with privsep before
(10:20:13 AM) lyarwood: https://github.com/openstack/os-brick/blob/master/os_brick/encryptors/luks.py#L150-L161
(10:20:36 AM) lyarwood: mriedem: yeah I think so

So this might just be a problem in the oslo.privsep library where it dumps stacktraces at debug level which aren't actually errors.