[cinder][nova] Running parallel iSCSI/LVM c-vol backends is causing random failures in CI

Jeremy Stanley fungi at yuggoth.org
Tue Mar 9 22:18:12 UTC 2021


On 2021-03-09 22:08:18 +0000 (+0000), Lee Yarwood wrote:
> I reported the following bug last week but I've yet to get any real
> feedback after asking a few times in irc.
> 
> Running parallel iSCSI/LVM c-vol backends is causing random failures in CI
> https://bugs.launchpad.net/cinder/+bug/1917750
> 
> AFAICT tgtadm is causing this behaviour. As I've stated in the bug
> with Fedora 32 and lioadm I don't see the WWN conflict between the two
> backends. Does anyone know if using lioadm is an option on Focal?

https://docs.openstack.org/cinder/latest/admin/blockstorage-lio-iscsi-support.html
seems to indicate that you just need to set it in configuration. The
package that document mentions looks like a distro package
recommendation (does not exist under that name on PyPI) and the
equivalent lib on PyPI is included in cinder's requirements.txt
file, but I don't see either mentioned in the devstack source tree
so maybe that needs to be installed for DevStack-based jobs to take
advantage of it.
-- 
Jeremy Stanley
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