Dear list, we're using Q-Logic QLE2562 Fibre Channel adapters (qla2xxx driver) against a HPE 3PAR 7400c storage array in an OpenStack environment. The OpenStack 3PAR driver manages volume attachments from the array to the servers. There is 4 path multipath to every volume. As the LUNs are removed, sometimes udev does not remove all links, particularly in /run/udev/links and /dev/disk/by-path. The symptoms are multiple records in one by-path directory under /run/udev/links, broken links to no longer attached luns in dev/disk/by-path and links between wrong LUNs and scsi devices there. I'm getting "multipathd: udev trigger error" in syslog. OpenStack relies on these links. When another volume is attached using a LUN that has these leftover links and it happens that it is the first of the 4 paths, OpenStack incorrectly identifies the volume and attaches the same volume to multiple instances, leading to data loss. What could be causing this behavior? Ubuntu version 14.04 Linux version Ubuntu 4.4.0-47.68~14.04.1-generic 4.4.24 udev 204-5ubuntu20.19 Thanks for any troubleshooting tips, Tomas Vondra -- To unsubscribe from this list: send the line "unsubscribe linux-hotplug" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
