We already discussed this: https://www.spinics.net/lists/ceph-devel/msg34559.html What do you think of comment posted in that ML? Would that make sense to you as well? On Tue, Feb 28, 2017 at 2:41 AM, Vasu Kulkarni <vakulkar@xxxxxxxxxx> wrote: > Ilya, > > Many folks hit this and its quite difficult since the error is not properly > printed out(unless one scans syslogs), Is it possible to default the feature > to > the one that kernel supports or its not possible to handle that case? > > Thanks > > On Mon, Feb 27, 2017 at 5:59 AM, Ilya Dryomov <idryomov@xxxxxxxxx> wrote: >> >> On Mon, Feb 27, 2017 at 2:37 PM, Simon Weald <simon@xxxxxxxxxxxxxx> wrote: >> > 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: >> >> object-map, fast-diff, deep-flatten are still unsupported. >> >> > Do >> > >> > $ rbd feature disable <image-name> >> > deep-flatten,fast-diff,object-map,exclusive-lock >> > >> > to disable features unsupported by the kernel client. If you are using >> > the >> > kernel client, you should create your images with >> > >> > $ rbd create --size <size> --image-feature layering <image-name> >> > >> > or add >> > >> > rbd default features = 3 >> > >> > to ceph.conf on the client side. (Setting rbd default features on the >> > OSDs will have no effect.) >> >> exclusive-lock is supported starting with 4.9. The above becomes >> >> > $ rbd feature disable <image-name> deep-flatten,fast-diff,object-map >> > $ rbd create --size <size> --image-feature layering,exclusive-lock >> > <image-name> >> > rbd default features = 5 >> >> if you want it. >> >> Thanks, >> >> Ilya >> _______________________________________________ >> ceph-users mailing list >> ceph-users@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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