I've currently having some issues making some Jessie-based Xen hosts talk to a Trusty-based cluster due to feature mismatch errors. Our Trusty hosts are using 3.19.0-80 (the Vivid LTS kernel), and our Jessie hosts were using the standard Jessie kernel (3.16). Volumes wouldn't map, so I tried the kernel from jessie-backports (4.9.2-2~bpo8+1); still no joy. I then tried compiling the latest kernel in the 4.9 branch (4.9.12) from source with the Debian kernel config - still no joy. As I understand it there have been a lot of changes in krbd which I should have pulled in when building from source - am I missing something? Some info about the Xen hosts: root@xen-host:~# uname -r 4.9.12-internal root@xen-host:~# ceph -v ceph version 10.2.5 (c461ee19ecbc0c5c330aca20f7392c9a00730367) root@xen-host:~# rbd map -p cinder volume-88188973-0f40-48a3-8a88-302d1cb5e093 rbd: sysfs write failed RBD image feature set mismatch. You can disable features unsupported by the kernel with "rbd feature disable". In some cases useful info is found in syslog - try "dmesg | tail" or so. rbd: map failed: (6) No such device or address root@xen-host:~# dmesg | grep 'unsupported' [252723.885948] rbd: image volume-88188973-0f40-48a3-8a88-302d1cb5e093: image uses unsupported features: 0x38 root@xen-host:~# rbd info -p cinder volume-88188973-0f40-48a3-8a88-302d1cb5e093 rbd image 'volume-88188973-0f40-48a3-8a88-302d1cb5e093': size 1024 MB in 256 objects order 22 (4096 kB objects) block_name_prefix: rbd_data.c6bd3c5f705426 format: 2 features: layering, exclusive-lock, object-map, fast-diff, deep-flatten flags: And some about the storage cluster: root@mon01:~# ceph -v ceph version 10.2.5 (c461ee19ecbc0c5c330aca20f7392c9a00730367) root@mon01:~# uname -r 3.19.0-80-generic For security reasons, we won't provide direct access to the Ceph cluster for VMs, so they have to be mapped on the host and then attached (they're customer machines). Can anyone point me in the right direction as to how we can get this working? -- PGP: http://www.simonweald.com/SimonWeald.asc https://pgp.mit.edu/pks/lookup?op=get&search=0x988E9858747ABE88 _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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