Re: krbd map on Jewel, sysfs write failed when rbd map

[Varada Kari <Varada.Kari@xxxxxxxxxxx>]

Using any kernel >= 4.2 shouldn't have any problem. If you are using kernel version < 4.2, disable the recent features except layering.

Varada

On Monday 18 April 2016 02:41 PM, 席智勇 wrote:

thanks for ur reply~

I did some search, and found the reason, like the mail(http://lists.ceph.com/pipermail/ceph-users-ceph.com/2015-September/004928.html) said, that because the krbd still not yet support the new RBD features like exclusive-lock.

2016-04-18 16:45 GMT+08:00 huang jun <hjwsm1989@xxxxxxxxx>:

Hi, can you post the 'modinfo rbd' and your cluster state 'ceph -s'.

2016-04-18 16:35 GMT+08:00 席智勇 <xizhiyong18@xxxxxxxxx>:
> hi cephers:
>
> I create a rbd volume(image) on Jewel release, when exec rbd map, I got the
> error message as follows.i can not  find any message usage in
> syslog/kern.log/messages.
> anyone can share some tips?
>
> ----------------------my ceph
> version--------------------------------------------
> root@hzbxs-xzy-ceph-dev-mon:~/ceph-cluster# ceph -v
> ceph version 10.1.2 (4a2a6f72640d6b74a3bbd92798bb913ed380dcd4)
> ---------------------system
> info----------------------------------------------------
> root@hzbxs-xzy-ceph-dev-mon:~/ceph-cluster# cat /etc/debian_version
> 8.4
> root@hzbxs-xzy-ceph-dev-mon:~/ceph-cluster# uname -a
> Linux hzbxs-xzy-ceph-dev-mon 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt25-2
> (2016-04-08) x86_64 GNU/Linux
> ----------------------my screen
> snap---------------------------------------------
> root@hzbxs-xzy-ceph-dev-mon:~/ceph-cluster# ceph osd lspools
> 2016-04-18 16:24:24.691909 7fb08663b700 -1 WARNING: the following dangerous
> and experimental features are enabled: bluestore,rocksdb
> 2016-04-18 16:24:24.701003 7fb08663b700 -1 WARNING: the following dangerous
> and experimental features are enabled: bluestore,rocksdb
> 1 rbd,
> root@hzbxs-xzy-ceph-dev-mon:~/ceph-cluster# rbd --image test_volume info
> --pool rbd
> 2016-04-18 16:24:27.396490 7f2156ea2d40 -1 WARNING: the following dangerous
> and experimental features are enabled: bluestore,rocksdb
> 2016-04-18 16:24:27.396551 7f2156ea2d40 -1 WARNING: the following dangerous
> and experimental features are enabled: bluestore,rocksdb
> 2016-04-18 16:24:27.399508 7f2156ea2d40 -1 WARNING: the following dangerous
> and experimental features are enabled: bluestore,rocksdb
> rbd image 'test_volume':
> size 1024 MB in 256 objects
> order 22 (4096 kB objects)
> block_name_prefix: rbd_data.371a6b8b4567
> format: 2
> features: layering, exclusive-lock, object-map, fast-diff, deep-flatten
> flags:
> root@hzbxs-xzy-ceph-dev-mon:~/ceph-cluster# rbd map test_volume --pool rbd
> 2016-04-18 16:25:02.547462 7f291c173d40 -1 WARNING: the following dangerous
> and experimental features are enabled: bluestore,rocksdb
> 2016-04-18 16:25:02.547523 7f291c173d40 -1 WARNING: the following dangerous
> and experimental features are enabled: bluestore,rocksdb
> 2016-04-18 16:25:02.550352 7f291c173d40 -1 WARNING: the following dangerous
> and experimental features are enabled: bluestore,rocksdb
> rbd: sysfs write failed
> rbd: map failed: (6) No such device or address
> root@hzbxs-xzy-ceph-dev-mon:~/ceph-cluster#
>

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--
Thank you!
HuangJun

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