I am trying to make a second compute node operational. however, so far not succeeded in launching the instance. I followed similar steps to add a compute node from openstack documentation.

Error: Failed to perform requested operation on instance "Instancetest", the instance has an error status: Please try again later [Error: No valid host was found. There are not enough hosts available.].

below are few logs I noticed, can any one suggest what I could be missing?

[root@compute2 nova]# neutron agent-list
+--------------------------------------+--------------------+----------+-------+----------------+---------------------------+
| id                                   | agent_type         | host     | alive | admin_state_up | binary                    |
+--------------------------------------+--------------------+----------+-------+----------------+---------------------------+
| 0cb8d0d4-140a-4446-add8-7881f0a07dda | DHCP agent         | network  | :-)   | True           | neutron-dhcp-agent        |
| 2a164cb6-0c6d-418a-ab7d-f68a0f3a3032 | L3 agent           | network  | :-)   | True           | neutron-l3-agent          |
| abbe20eb-8f49-43e6-a0d7-d2625ef07084 | Open vSwitch agent | network  | :-)   | True           | neutron-openvswitch-agent |
| d4e1b8a7-f826-4213-9f5f-9ab936d4f004 | Open vSwitch agent | compute1 | :-)   | True           | neutron-openvswitch-agent |
| ec116376-6d3f-4623-b5b5-78736ac41a5a | Metadata agent     | network  | :-)   | True           | neutron-metadata-agent    |
+--------------------------------------+--------------------+----------+-------+----------------+---------------------------+

From the nova conductor log on Controller:

2015-10-05 21:22:57.378 4737 WARNING nova.scheduler.utils [req-78fe3a75-24fc-48c8-8041-44414315acea 96771cdf5d2844ed919a172556dec532 e4b31c40067e473c8c07fe5ff1021ac7 - - -] [instance: 8e3ae49a-27e4-4c06-8813-c0b900c4b9e5] Setting instance to ERROR state.
2015-10-05 22:27:52.634 4738 ERROR nova.scheduler.utils [req-f335dd94-73fc-489d-b6bd-cb7187a79c1c 96771cdf5d2844ed919a172556dec532 e4b31c40067e473c8c07fe5ff1021ac7 - - -] [instance: baf256cf-3c0f-49ea-9535-f1aea5bb0827] Error from last host: compute2 (node compute2): [u'Traceback (most recent call last):\n', u'  File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2235, in _do_build_and_run_instance\n    filter_properties)\n', u'  File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2381, in _build_and_run_instance\n    instance_uuid=instance.uuid, reason=six.text_type(e))\n', u'RescheduledException: Build of instance baf256cf-3c0f-49ea-9535-f1aea5bb0827 was re-scheduled: Unexpected vif_type=binding_failed\n']
2015-10-05 22:27:52.652 4738 WARNING nova.scheduler.utils [req-f335dd94-73fc-489d-b6bd-cb7187a79c1c 96771cdf5d2844ed919a172556dec532 e4b31c40067e473c8c07fe5ff1021ac7 - - -] Failed to compute_task_build_instances: No valid host was found. There are not enough hosts available.
Traceback (most recent call last):

  File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/server.py", line 142, in inner
    return func(*args, **kwargs)

  File "/usr/lib/python2.7/site-packages/nova/scheduler/manager.py", line 86, in select_destinations
    filter_properties)

  File "/usr/lib/python2.7/site-packages/nova/scheduler/filter_scheduler.py", line 80, in select_destinations
    raise exception.NoValidHost(reason=reason)

NoValidHost: No valid host was found. There are not enough hosts available.

2015-10-05 22:27:52.653 4738 WARNING nova.scheduler.utils [req-f335dd94-73fc-489d-b6bd-cb7187a79c1c 96771cdf5d2844ed919a172556dec532 e4b31c40067e473c8c07fe5ff1021ac7 - - -] [instance: baf256cf-3c0f-49ea-9535-f1aea5bb0827] Setting instance to ERROR state.

From /var/log/nova/nova-compute.log

2015-10-05 22:46:34.397 1092 INFO nova.scheduler.client.report [req-f107233e-76a4-4dd3-aa39-8739920e327f - - - - -] Compute_service record updated for ('compute2', 'compute2')
2015-10-05 22:46:34.397 1092 INFO nova.compute.resource_tracker [req-f107233e-76a4-4dd3-aa39-8739920e327f - - - - -] Compute_service record updated for compute2:compute2
2015-10-05 22:47:35.127 1092 INFO nova.compute.resource_tracker [req-f107233e-76a4-4dd3-aa39-8739920e327f - - - - -] Auditing locally available compute resources for node compute2
2015-10-05 22:47:35.313 1092 INFO nova.compute.resource_tracker [req-f107233e-76a4-4dd3-aa39-8739920e327f - - - - -] Total usable vcpus: 8, total allocated vcpus: 0
2015-10-05 22:47:35.313 1092 INFO nova.compute.resource_tracker [req-f107233e-76a4-4dd3-aa39-8739920e327f - - - - -] Final resource view: name=compute2 phys_ram=31986MB used_ram=5632MB phys_disk=464GB used_disk=42GB total_vcpus=8 used_vcpus=0 pci_stats=<nova.pci.stats.PciDeviceStats object at 0x5a43b10>