On 03/23/2018 12:14 PM, Ilya Dryomov wrote:
> luminous cluster-wide feature bits are supported since kernel 4.13.
?
# uname -a
Linux abweb1 4.14.0-0.bpo.3-amd64 #1 SMP Debian 4.14.13-1~bpo9+1
(2018-01-14) x86_64 GNU/Linux
# rbd info truc
rbd image 'truc':
size 20480 MB in 5120 objects
order 22 (4096 kB objects)
block_name_prefix: rbd_data.9eca966b8b4567
format: 2
features: layering, exclusive-lock, object-map, fast-diff, deep-flatten
flags:
# rbd map truc
rbd: sysfs write failed
RBD image feature set mismatch. You can disable features unsupported by
the kernel with "rbd feature disable pool/truc object-map fast-diff
deep-flatten".
In some cases useful info is found in syslog - try "dmesg | tail".
rbd: map failed: (6) No such device or address
# dmesg | tail -1
[1108045.667333] rbd: image truc: image uses unsupported features: 0x38
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