I don't think libvirt-daemon actually requires the whole ceph package. From a quick read of the source it doesn't look like it execs any of the command-line tools. As of F18 (bug #812975) the ceph libraries and apps are packaged separately, and rpm's ELF logic will pick up the libraries as needed anyway. The 'ceph' package itself is about 25M installed, which is rather a lot on size-constrained media like a live image. Would it be possible to remove the explicit Requires: ceph from the spec?
Correct, we only rely on librbd.so, which RPM should automagically pull in for us, so no objection to removing the explicit 'Requires: ceph'.
Pushed a fix upstream commit 8386b304b0f16db4e88ddf1eca50b84a465eff80 Author: Daniel P. Berrange <berrange> Date: Wed Sep 5 08:58:50 2012 +0100 Remove explicit dependency on ceph RPM The libvirt storage driver uses librbd.so for its functionality. RPM will automatically add a dependency on the library, so there is no need to have an explicit dependency on the ceph RPM itself. This allows newer Fedora distros to avoid pulling in the huge ceph RPM, in favour of just having the libraries installed copying into Fedora shortly....
libvirt-0.10.1-2.fc18 has been submitted as an update for Fedora 18. https://admin.fedoraproject.org/updates/libvirt-0.10.1-2.fc18
Package libvirt-0.10.1-2.fc18: * should fix your issue, * was pushed to the Fedora 18 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing libvirt-0.10.1-2.fc18' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2012-13853/libvirt-0.10.1-2.fc18 then log in and leave karma (feedback).
libvirt-0.10.1-4.fc18 has been pushed to the Fedora 18 stable repository. If problems still persist, please make note of it in this bug report.