OpenStack services assume that they are the sole owners of the iSCSI connections to the iSCSI portal-targets generated by the Cinder driver, and that is fine 98% of the time, but what happens when we also want to have other non-OpenStack iSCSI volumes from that same storage system present on boot? In OpenStack the OS-Brick library is used by Nova-compute, Cinder-volume, Cinder-backup, and, depending on our configuration, Glance as well, to handle block volume connections. At a very high level […]