# dmesg -T |grep -i ceph
libceph: mon0 10.11.2.35:6789 missing required protocol features

手动map
# rbd map rbd/kubernetes-dynamic-pvc-7f783e8c-c00c-11e9-9838-5cb901987210
rbd: sysfs write failed
In some cases useful info is found in syslog - try "dmesg | tail".
rbd: map failed: (5) Input/output error