I had working setup with Havana and nova-network with multinode setup. I was able to create the instance and login etc. I wanted to try Neutron with following setup.

1. Host1 - Controller, Compute, Neutron Server, Ovsplugin. This system had nova-network. I have stopped that service.
2. Host2 - Compute
3. Host3 - Neutron dhcp-agent.

When I create the instance it always stays in 'scheduling'.

Troubleshooting done:

1. No errors observed in /var/log/nova*.log - Checked on controller
2. No errors observed in /var/log/neutron/*.log - Checked on controller
3. No errors observed in /var/log/neutron/dhcp*.log - Checked on host3 which has only dhcp agent.
4. /var/log/libvirt/qemu/ does not have instance
5. /var/lib/nova/instances does not instance entry
6. If run 'nova console-log <id>', it displays the error saying instance is not ready.</id>
7. I have shutdown the nova-network on the controller.
8. /var/log/syslog does not have any error
9. dmesg command on ubuntu does not display any error.

I dont' see any errors anywhere. Any inputs on how to troubleshoot this ? Without any logs it is becoming difficult to troubleshoot.