I am trying to add a compute to an existing Controller. Following the install doc for liberty, when I try install the nova-compute it installs a different version of nova services (there is a mismatch of versions between controller and new compute). And when I start nova-compute it stays down and I get the following log messages .. Can anyone help me solving this issue.

File "/usr/lib/python2.7/dist-packages/nova/objects/compute_node.py", line 425, in get_all_by_host 2016-06-17 07:43:58.384 6446 TRACE nova.openstack.common.threadgroup raise exception.ComputeHostNotFound(host=host) 2016-06-17 07:43:58.384 6446 TRACE nova.openstack.common.threadgroup 2016-06-17 07:43:58.384 6446 TRACE nova.openstack.common.threadgroup ComputeHostNotFound: Compute host vtl-compute-4 could not be found. 2016-06-17 07:43:58.384 6446 TRACE nova.openstack.common.threadgroup 2016-06-17 07:43:58.384 6446 TRACE nova.openstack.common.threadgroup

root@controller:/home/lkesavan# nova service-list +----+------------------+---------------+----------+---------+-------+----------------------------+-----------------+ | Id | Binary | Host | Zone | Status | State | Updated_at | Disabled Reason | +----+------------------+---------------+----------+---------+-------+----------------------------+-----------------+ | 1 | nova-compute | compute2 | compute2 | enabled | up | 2016-06-17T15:40:39.000000 | - | | 2 | nova-compute | compute1 | compute1 | enabled | up | 2016-06-17T15:40:43.000000 | - | | 3 | nova-cert | controller | internal | enabled | up | 2016-06-17T15:40:45.000000 | - | | 4 | nova-consoleauth | controller | internal | enabled | up | 2016-06-17T15:40:39.000000 | - | | 5 | nova-conductor | controller | internal | enabled | up | 2016-06-17T15:40:42.000000 | - | | 6 | nova-scheduler | controller | internal | enabled | up | 2016-06-17T15:40:42.000000 | - | | 7 | nova-compute | vtl-compute-4 | nova | enabled | down | - | - | | 8 | nova-compute | vtl-compute-3 | nova | enabled | down | - | - | +----+------------------+---------------+----------+---------+-------+----------------------------+-----------------+