Open Stack

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 <kazishariar at 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.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
>>
>> [image: Description: Description: Description: Description:
>> cid:image001.jpg at 01CB113F.29C354B0]
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