When using what I think is the last repository : [openstack] name=OpenStack baseurl=http://yum.griddynamics.net/yum/diablo enabled=1 gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-OPENSTACK I'm getting in /var/log/nova/nova-compute.log : 2011-10-04 18:03:54,331 nova.utils: Inner Exception: No module named kombu.connection After a : yum install python-kombu.noarch It's working much better. I installed my compute node with: yum install openstack-nova-compute so a dependency might be missing.