Issues starting the nova conductor service on the controller node. This results as a part of the misconfiguration of the nova conductor in /etc/nova/nova.conf on the controller node of OpenStack.
As usual the best place to see the reasons for problems with the OpenStack Nova services on the controller is at the location /var/log/nova/*. See the logs there.
The below message appears in /var/log/nova/nova-conductor.log
==> nova-conductor.log <==
2016-07-06 06:32:20.891 27161 ERROR oslo.messaging._drivers.impl_rabbit [req-7bff235c-2535-4d18-b9e0-351c6e23557c - - - - -] AMQP server controller1.example.com:5672 closed the connection. Check login credentials: Socket closed
This means that the user mentioned on the Nova Configuration user as the user to be used to access the Rabbitmq either is not present or if present has a password which does not match with the rabbitmq configuration.
My Nova Configuration file looked like this (/etc/nova/nova.conf on the controller server)
[DEFAULT]
rpc_backend = rabbit
[oslo_messaging_rabbit]
rabbit_host = controller1.example.com
rabbit_userid = openstack
rabbit_password = XXXXXXX
The Fix:
1) In case the user for rabbitmq access as mentioned here as "openstack" is not created then create the user on the controller server in the setup as
rabbitmqctl add_user openstack XXXXXXX
where XXXXXXX is a password which you want to give to the user
2) In case there is a password mismatch between the one given in /etc/nova/nova.conf and the actual rabbitmq password in the rabbitmq password you can set a new password for the user (openstack here) and update the same in the NOVA configuration file /etc/nova/nova.conf
rabbitmqctl change_passwd <user> <password>
Refer to the man pages of rabbitmqctl for more.
root@controller1 nova]# rabbitmqctl --help | grep -i use
Error: could not recognise command
the correct suffix to use after the "@" sign. See rabbitmq-server(1) for
add_user <username> <password>
delete_user <username>
change_password <username> <newpassword>
clear_password <username>
authenticate_user <username> <password>
set_user_tags <username> <tag> ...
list_users
set_permissions [-p <vhost>] <user> <conf> <write> <read>
clear_permissions [-p <vhost>] <username>
list_user_permissions <username>
channels, protocol, auth_mechanism, user, vhost, timeout, frame_max,
user, vhost, transactional, confirm, consumer_count, messages_unacknowledged,
[root@controller1 nova]#
[root@controller1 nova]#
[root@controller1 nova]# rabbitmqctl change_passwd nova XXXXXXX
