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 <j...@garzik.org> description: rados block device author: Yehuda Sadeh <yeh...@hq.newdream.net> author: Sage Weil <s...@newdream.net> author: Alex Elder <el...@inktank.com> 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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