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A multipath device is detected because there is a /sys/dev/block/M:m/dm/uuid file with the mpath- prefix (or part\w+-mpath prefix). When ceph-disk prepares data or journal devices on a multipath device, it sets the partition typecode to MPATH_JOURNAL_UUID, MPATH_OSD_UUID and MPATH_TOBE_UUID to a) help the udev rules distinguish them from other devices in devicemapper b) allow ceph-disk to fail if an attempt is made to activate a device with this type without accessing it via a multipath device The 95-ceph-osd.rules call ceph-disk activate on partitions of type MPATH_JOURNAL_UUID, MPATH_OSD_UUID. It relies on ceph-disk to do nothing if the device is not accessed via multipath. http://tracker.ceph.com/issues/11881 Fixes: #11881 Signed-off-by: Loic Dachary <ldachary@redhat.com> |
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50-rbd.rules | ||
60-ceph-partuuid-workaround.rules | ||
95-ceph-osd-alt.rules | ||
95-ceph-osd.rules | ||
95-ceph-osd.rules.systemd |