AMQP server on controller is unreachable?

If AMQP server on controller  is unreachable,   move amqp configuration in /etc/nova/nova.conf to default section

[DEFAULT]
notification_driver=ceilometer.compute.nova_notifier
notification_driver=nova.openstack.common.notifier.rpc_notifier
rabbit_host=10.16.28.190
rabbit_port=5672
rabbit_hosts=10.16.28.190:5672
rabbit_use_ssl=False
rabbit_userid=guest
rabbit_password=guest
rabbit_virtual_host=/
rabbit_ha_queues=False

Configure RHEL OSP All in one

RHEL OSP 7 configuration

yum -y install net-tools nano

subscription-manager repos –disable=*
subscription-manager repos –enable=rhel-7-server-rpms
subscription-manager repos –enable=rhel-7-server-rh-common-rpms
subscription-manager repos –enable=rhel-7-server-openstack-6.0-installer-rpms
subscription-manager repos –enable=rhel-server-rhscl-7-rpms
subscription-manager repos –enable=rhel-7-server-openstack-6.0-rpms

yum update -y
systemctl disable NetworkManager
reboot
yum -y install openstack-packstack
packstack –allinone