Restarting your TripleO hypervisor will break cinder volume service thus the overcloud pingtest

I don’t usualy restart my hypervisor, today I had to install LVM2 and virsh stopped to work so a restart was required, once the VMs were up and running the overcloud pingtest failed as cinder was not able to start.

From your Overcloud controller run:

sudo losetup -f /var/lib/cinder/cinder-volumes
sudo vgdisplay
sudo service openstack-cinder-volume restart

This will make your Overcloud pingtest work again.