Open Stack

Launch of a instance failed in juno devstack on ubuntu server 14.04 virtual
machine.
I am getting error "Host not found".
Below is part of /opt/stack/logs/screen/screen-n-cond.log
2014-08-30 12:06:51.721 ERROR nova.scheduler.utils
[req-744ba1cf-7433-46b4-9771-9600a87e8c28 admin admin] [instance:
2a679ed7-2f60-493a-a6cf-d937f11f442b] Error from last host:
juno-devstack-server (node juno-devstack-server): [u'Traceback (most recent
call last):\n', u'  File "/opt/stack/nova/nova/compute/manager.py", line
1932, in do_build_and_run_instance\n    filter_properties)\n', u'  File
"/opt/stack/nova/nova/compute/manager.py", line 2061, in
_build_and_run_instance\n    instance_uuid=instance.uuid,
reason=six.text_type(e))\n', u'RescheduledException: Build of instance
2a679ed7-2f60-493a-a6cf-d937f11f442b was re-scheduled: not all arguments
converted during string formatting\n']
2014-08-30 12:06:51.724 INFO oslo.messaging._drivers.impl_rabbit
[req-744ba1cf-7433-46b4-9771-9600a87e8c28 admin admin] Connecting to AMQP
server on 192.168.2.153:5672
2014-08-30 12:06:51.736 INFO oslo.messaging._drivers.impl_rabbit
[req-744ba1cf-7433-46b4-9771-9600a87e8c28 admin admin] Connected to AMQP
server on 192.168.2.153:5672
2014-08-30 12:06:51.763 WARNING nova.scheduler.driver
[req-744ba1cf-7433-46b4-9771-9600a87e8c28 admin admin] [instance:
2a679ed7-2f60-493a-a6cf-d937f11f442b] NoValidHost exception with message:
'No valid host was found.'
2014-08-30 12:06:51.763 WARNING nova.scheduler.driver
[req-744ba1cf-7433-46b4-9771-9600a87e8c28 admin admin] [instance:
2a679ed7-2f60-493a-a6cf-d937f11f442b] Setting instance to ERROR state.


Earlier also i mailed and i got reply "Compute node do not support  QEMU
hypervisor from Juno. So, you should not deploy a compute node on  VM"

Is  there any link in support of this answer?


Also some other observation is below:

Before ./stack.sh,contents of hosts file is:
vi /etc/hosts
127.0.0.1       localhost
192.168.2.153   juno-devstack-server
#127.0.1.1      juno-devstack-server

# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

After ./stack.sh,contents of host file is:

127.0.0.1       localhost  *juno-devstack-server*
192.168.2.153   juno-devstack-server
#127.0.1.1      juno-devstack-server

# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters


Regards
Nikesh
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