Error in Horizon: No valid host was found. There are not enough hosts available.
I try to launch a VM, but I got error. Nove-compute.log is here: http://paste.openstack.org/show/594226/
Please, share nova.conf, also I would check if kvm is supported in your hypervisor, by the log i would say no.
If number is not 1 or more, change kvm to qemu in nova.conf of the compute node.