you can check nova-scheduler service log, you can find about error log. Maybe you have no valid nova-compute host, check you ntp and nova-compute is work! Kevin Zhang Weibo:kevin_prajna Twitter:topshare MSN:zhangjinnan at hotmail.com On Dec 17, 2013, at 2:21 PM, Kevin Breit <kevin.breit at kevinbreit.net> wrote: > No valid host was found -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack/attachments/20131217/e3214729/attachment.html>