I actually just ran into this myself with a new install, I have Ceph for instance storage, and the "DiskFilter" couldn't detect the ceph storage so I had to remove that from scheduler_default_filters in the nova.conf file on the controllers.
If anyone knows how to include that still as a check it would be greatly appreciated... I will just have to be monitoring disk usage outside of the scheduler otherwise at the moment. -Mitch On Sun, Aug 10, 2014 at 11:42 AM, Shariar Kazi <kazishar...@gmail.com> wrote: > From: > > > http://openstack.redhat.com/forum/discussion/952/problem-creating-instances-no-valid-host/p1 > > Check subnet availability. Also: > > No valid host means the scheduler was unable to find a compute host > suitable for booting your new instance. A common cause of this is not > enough memory on your compute nodes, so check that. Also make sure that > your compute nodes have the brctl command available, which is necessary > to set up networking for the instance -- if that command is missing, you > will also see this error. > > To help identify the source of the problem, you'll want to make sure you > have debug logging turned on (debug=True in /etc/nova/nova.conf) on both > your controller and your compute node. Pay careful attention to the > messages logged when an instance is booting; generally somewhere in there > will be the source of the problem. > > > > > > Regards, > > Shariar Kazi > > > On Sun, Aug 10, 2014 at 7:29 AM, Giles Cornelius Gomes < > giles.cornel...@novotel-bd.com> wrote: > >> I am getting following error while launching an instance from dashboard. >> >> >> >> *Error:* Failed to launch instance "devstack-havana": Please try again >> later [Error: No valid host was found. ]. >> >> >> >> Please let me know the reason and remedy. >> >> >> >> Best regards, >> >> >> >> *Giles Cornelius Gomes* >> >> Database Administrator (Billing) >> NovoTel Limited >> House: Ga-30/G, Pragati Sarani >> Shahjadpur, Gulshan-2 >> Dhaka-1212, Bangladesh >> >> Tel: +880-2-8899657; Ext: 212 >> Fax: +880-2-8899654 >> Web: www.novotel-bd.com >> >> [image: Description: Description: Description: Description: >> cid:image001.jpg@01CB113F.29C354B0] >> *Disclaimer: * >> >> This e-mail and any files transmitted with it are for the sole use of the >> intended recipient(s) and may contain confidential and privileged >> information. If you are not the intended recipient, please contact the >> sender by reply e-mail and destroy all copies and the original message. Any >> unauthorized review, use, disclosure, dissemination, forwarding, printing >> or copying of this e-mail or any action taken in reliance on this e-mail is >> strictly prohibited and may be unlawful. >> >> >> >> _______________________________________________ >> Mailing list: >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack >> Post to : openstack@lists.openstack.org >> Unsubscribe : >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack >> >> > > _______________________________________________ > Mailing list: > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : openstack@lists.openstack.org > Unsubscribe : > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > >
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