[Bug 1578484] Re: ceph rbd map in ubuntu 16.04 fails with map failed: (6) No such device or address

[Jason Dillaman]

Please see the Jewel release notes [1] regarding this change.
Specifically, Ceph, by default, creates new RBD images using features
currently unsupported by krbd.  You can disable these features on an
existing image using the 'rbd feature disable' command or you can revert
to pre-Jewel features for all new images by adding "rbd default features
= 1" in your Ceph configuration file.

[1] http://docs.ceph.com/docs/master/release-notes/#upgrading-from-
infernalis-or-hammer

-- 
You received this bug notification because you are a member of Ubuntu
OpenStack, which is subscribed to ceph in Ubuntu.
https://bugs.launchpad.net/bugs/1578484

Title:
  ceph rbd map in ubuntu 16.04 fails with map failed: (6) No such device
  or address

Status in ceph package in Ubuntu:
  New

Bug description:
  Ubuntu 16.04 with ceph cluster ok

  root at x4600:~# ceph --version

  ceph version 10.1.2 (4a2a6f72640d6b74a3bbd92798bb913ed380dcd4)

  
  root at x4600:~# ceph status
      cluster 9ed0acb4-425c-4d09-a693-471ed6391d6b
       health HEALTH_WARN
              too many PGs per OSD (490 > max 300)
       monmap e2: 3 mons at {cephmon1=10.10.25.105:6789/0,cephmon2=10.10.25.106:6789/0,cephmon3=10.10.25.107:6789/0}
              election epoch 8, quorum 0,1,2 cephmon1,cephmon2,cephmon3
       osdmap e254: 46 osds: 46 up, 46 in
              flags sortbitwise
        pgmap v141576: 11280 pgs, 13 pools, 278 MB data, 291 objects
              232 GB used, 85424 GB / 85656 GB avail
                 11280 active+clean

  
  rbd create is ok:

  root at x4600:~# rbd create rbd/pippo --size 10240 --image-format 2

  
  rbd ls is ok:

  root at x4600:~# rbd ls
  pippo

  
  rbd map fails

  root at x4600:~# rbd map rbd/pippo
  rbd: sysfs write failed
  rbd: map failed: (6) No such device or address

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ceph/+bug/1578484/+subscriptions