Re: rbd map fails, ceph release jewel

Shambhu Rajak <srajak@xxxxxxxxxxxx> · Thu, 1 Jun 2017 09:35:15 +0000

Thanks David, I upgraded the kernel version and the rbd map worked.
Regards,
Shambhu

From: David Turner [mailto:drakonstein@xxxxxxxxx]

Sent: Wednesday, May 31, 2017 9:35 PM

To: Shambhu Rajak; ceph-users@xxxxxxxxxxxxxx

Subject: Re: [ceph-users] rbd map fails, ceph release jewel

You are trying to use the kernel client to map the RBD in Jewel.  Jewel RBDs have options enabled that require you to run a kernel 4.9 or newer.  You can disable the features that are requiring the newer kernel, but that's not very good
 as those new features are very nice to have.  You can use RBD-fuse to mount them, that is up to date for your Ceph version.  I would probably go the RBD-fuse route in your position, unless upgrading your kernel to 4.9 is an option.

On Wed, May 31, 2017 at 9:36 AM Shambhu Rajak <srajak@xxxxxxxxxxxx> wrote:

Hi Cepher,
I have created a pool and trying to create rbd image on the ceph client, while mapping the rbd image it fails as:

ubuntu@shambhucephnode0:~$ sudo rbd map pool1-img1 -p pool1
rbd: sysfs write failed
In some cases useful info is found in syslog - try "dmesg | tail" or so.
rbd: map failed: (5) Input/output error

so I checked the dmesg as suggested:

ubuntu@shambhucephnode0:~$ dmesg | tail
[788743.741818] libceph: mon2
10.186.210.243:6789 feature set mismatch, my 4a042a42 < server's 2004a042a42, missing 20000000000
[788743.746352] libceph: mon2
10.186.210.243:6789 socket error on read
[788753.757934] libceph: mon2
10.186.210.243:6789 feature set mismatch, my 4a042a42 < server's 2004a042a42, missing 20000000000
[788753.777578] libceph: mon2
10.186.210.243:6789 socket error on read
[788763.773857] libceph: mon0
10.186.210.241:6789 feature set mismatch, my 4a042a42 < server's 2004a042a42, missing 20000000000
[788763.780539] libceph: mon0
10.186.210.241:6789 socket error on read
[788773.790371] libceph: mon1
10.186.210.242:6789 feature set mismatch, my 4a042a42 < server's 2004a042a42, missing 20000000000
[788773.811208] libceph: mon1
10.186.210.242:6789 socket error on read
[788783.805987] libceph: mon1
10.186.210.242:6789 feature set mismatch, my 4a042a42 < server's 2004a042a42, missing 20000000000
[788783.826907] libceph: mon1
10.186.210.242:6789 socket error on read

I am not sure what is going wrong here, my cluster health is HEALTH_OK though.

My configuration details:
Ceph version: ceph version 10.2.7 (50e863e0f4bc8f4b9e31156de690d765af245185)
OSD: 12 on 3 storage nodes
Monitor : 3 running on the 3 osd nodes

OS:
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.5 LTS
Release:        14.04
Codename:       trusty

Ceph Client Kernal Version:

Linux version 3.13.0-95-generic (buildd@lgw01-58) (gcc version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04.3) )

KRBD:
ubuntu@shambhucephnode0:~$ /sbin/modinfo rbd
filename:       /lib/modules/3.13.0-95-generic/kernel/drivers/block/rbd.ko
license:        GPL
author:         Jeff Garzik <jeff@xxxxxxxxxx>
description:    rados block device
author:         Yehuda Sadeh <yehuda@xxxxxxxxxxxxxxx>
author:         Sage Weil <sage@xxxxxxxxxxxx>
author:         Alex Elder <elder@xxxxxxxxxxx>
srcversion:     48BFBD5C3D31D799F01D218
depends:        libceph
intree:         Y
vermagic:       3.13.0-95-generic SMP mod_unload modversions
signer:         Magrathea: Glacier signing key
sig_key:        51:D5:D7:73:F1:07:BA:1B:C0:9D:33:68:38:C4:3C:DE:74:9E:4E:05
sig_hashalgo:   sha512

Thanks,
Shambhu Rajak

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