Open Stack

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.Cornelius at 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
>
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