On Tue, Sep 28, 2010 at 8:55 AM, Takuya ASADA <syuu@xxxxxxxxxxxx> wrote: > > Hi, > > I'm trying to test kvm-rbd, and I just failed to create image on it. > I followed installation sequence on the wiki > (http://ceph.newdream.net/wiki/Kvm-rbd), > and executed > $ qemu-img create -f rbd rbd:data/foo 10G > it returned > > failed assigning block id > qemu-img: rbd:data/foo: error while creating rbd: Input/output error > > Then I looked into source code, and realized maybe I need to load libcls_rbd.so, > so I executed > $ cclass -a > $ ceph class list > rbd class shows up. > > 10.09.29_00:55:53.939866 mon <- [class,list] > 10.09.29_00:55:53.940230 mon0 -> 'installed classes: > rbd (v1.2 [x86-64]) > ' (0) > > Then I tried "qemu-img create" again, also "rbd create", it didn't work at all. > Like this: > > $ rbd -p hoge99 --size 10 create test.img > failed to assign a block name for image > create error: Operation not supported > > $ qemu-img create -f rbd rbd:data/foo 10G > Formatting 'rbd:data/foo', fmt=rbd size=10737418240 cluster_size=0 > failed assigning block id > qemu-img: rbd:data/foo: error while creating rbd: Input/output error > > osd and mon are working correctly, I can use it via rados command and librados. > > My question is: > - Am I missing something to start using rbd? The rbd class is loaded but not activated. You can run 'ceph class activate rbd 1.2', it should fix it (note that it takes a minute to propagate). > > - Do I need rbd kernel module for kvm-rbd? > I thought it's just a userland application, which calling librados. > It is a userland application, and you don't need any kernel module. Thanks, Yehuda -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
