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Thanks Edger for your reply.  I checked the host VM it has enough 
resources to create tiny instances.  I noticed there was no br-int 
present on controller+compute node.  I don't know why it was not 
present.  I manually created br-int and also set-manager to odl 6640 
port.  Then, I am able to create Nova instances.

I also noticed if re-started odl that ran in other VM,  the controller 
dashboard won't be able to create Nova instances again. it is the same 
error. But at this time, br-int is present.

Thanks,
Irene


> On Wed, Oct 7, 2015 at 12:37 AM, Edgar Magana 
> <edgar.magana at workday.com <mailto:edgar.magana at workday.com>> wrote:
>
>     Review your nova-scheduler logs. It seems that yo have an issue
>     with the resources available to host VMs.
>
>     Cheers,
>
>     Edgar
>
>
>
>
>     On 10/6/15, 1:33 PM, "Irene Wu" <iwu at solananetworks.com
>     <mailto:iwu at solananetworks.com>> wrote:
>
>     >Hi,
>     >
>     >I was able to install a controller using devstack singlenode
>     local.conf
>     >(juno branch) in one VM(ubuntu14.04) and also installed a Lithium odl
>     >and installed features : odl-base-all, odl-aaa-authn, odl-restconf,
>     >odl-nsf-all, odl-mdsal-apidocs, odl-ovsdb-openstack
>     odl-ovsdb-northbound
>     >odl-dlux-core on other VM(ubuntu 14.04).  But when I tried to create
>     >instance in openstack dashboard GUI, I got error "“Error: No
>     valid host
>     >was found”.  I googled this error but is still unable to resolve it.
>     >
>     >devstack local.conf attached.
>     >
>     >controller ip :192.168.20.100
>     >odl ip : 192.168.20.110
>     >
>     >Here is the output of nova-manage service list:
>     >
>     >Binary           Host Zone             Status  State Updated_At
>     >nova-conductor   sln-openstack  internal enabled
>     >:-)   2015-10-06 18:41:11
>     >nova-cert        sln-openstack  internal enabled
>     >:-)   2015-10-06 18:41:11
>     >nova-scheduler   sln-openstack  internal enabled
>     >:-)   2015-10-06 18:41:11
>     >nova-compute     sln-openstack  nova enabled    :-)
>     >2015-10-06 18:41:10
>     >nova-consoleauth sln-openstack  internal enabled
>     >:-)   2015-10-06 18:41:11
>     >
>     >I was looking for the nova computer log, but there was no
>     /var/log/nova/
>     >directory created on the controller node ( the computer node is
>     on the
>     >same node with the controller node).  Is there anything I missed?
>
>
> Also, you have to configure Devstack to send logs to files, otherwise 
> they are all in the screen windows.
>
> I like this answer for more info on logging and Devstack.
> https://ask.openstack.org/en/question/28268/how-to-restart-services-and-where-is-the-logsdevstack/
> Anne
>
>     >
>     >Thanks,
>     >Irene
>     _______________________________________________
>     OpenStack-operators mailing list
>     OpenStack-operators at lists.openstack.org
>     <mailto:OpenStack-operators at lists.openstack.org>
>     http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
>
>
>
>
> -- 
> Anne Gentle
> Rackspace
> Principal Engineer
> www.justwriteclick.com <http://www.justwriteclick.com>

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