On Wed, Oct 8, 2014 at 2:35 AM, Ilya Dryomov <ilya.dryo...@inktank.com> wrote:
> On Wed, Oct 8, 2014 at 2:19 AM, Shawn Edwards <lesser.e...@gmail.com> > wrote: > > Are there any docs on what is possible by writing/reading from the rbd > > driver's sysfs paths? Is it documented anywhere? > > > > I've seen at least one blog post: > > http://www.sebastien-han.fr/blog/2012/06/24/use-rbd-on-a-client/ about > how > > you can attach to an rbd using the sysfs interface, but I haven't found > much > > else. > > It's in the kernel tree, Documentation/ABI/testing/sysfs-bus-rbd. > > > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/ABI/testing/sysfs-bus-rbd > > But keep in mind that rbd map and rbd unmap commands exist for a reason > and do a bit more than just writing stuff into sysfs. If you are > concerned about fetching tons of packages, I think there is work > underway to fix the packaging so that there is a relatively small > package containing just rbd binary and ceph mount helpers that can be > installed. > > That's the problem I'm running into, where I need the rbd command on a machine which has horribly old tools but a modern kernel. Is the simple-rbd-install effort somewhere I could see/help? I could see this as being very interesting to folks. > > > > A broader question: what is possible as far as communicating with ceph > using > > just the libceph and rbd kernel drivers? > > There is no way to use libceph directly. Using libceph+rbd you get an > rbd client, using libceph+ceph you get a cephfs client. libceph is > essentially a library where auth, crush, messenger, parts of objecter > and mon and osd clients are implemented. > > Thanks, > > Ilya > -- Shawn Edwards Beware programmers with screwdrivers. They tend to spill them on their keyboards.
_______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
