If currently Controller && Compute nodes are running Havana on F20 boxes
should I expect  future `yum update` to make painless upgrade to IceHouse
release or system will be  broken or frozen ?
Current status on Controller:-

[root@dfw02 boris(keystone_admin)]$ rpm -qa | grep openstack
openstack-nova-api-2013.2.3-1.fc20.noarch
openstack-keystone-2013.2.3-2.fc20.noarch
openstack-glance-2013.2.1-1.fc20.noarch
openstack-cinder-2013.2.3-1.fc20.noarch
openstack-nova-compute-2013.2.3-1.fc20.noarch
openstack-nova-conductor-2013.2.3-1.fc20.noarch
openstack-nova-common-2013.2.3-1.fc20.noarch
openstack-nova-cells-2013.2.3-1.fc20.noarch
openstack-nova-2013.2.3-1.fc20.noarch
openstack-nova-network-2013.2.3-1.fc20.noarch
python-django-openstack-auth-1.1.5-1.fc20.noarch
openstack-dashboard-theme-2014.1-1.fc20.noarch
openstack-utils-2013.2-2.fc20.noarch
openstack-nova-console-2013.2.3-1.fc20.noarch
openstack-ceilometer-compute-2013.2.3-1.fc20.noarch
openstack-nova-objectstore-2013.2.3-1.fc20.noarch
openstack-nova-scheduler-2013.2.3-1.fc20.noarch
openstack-neutron-openvswitch-2013.2.2-2.fc20.noarch
openstack-dashboard-2014.1-1.fc20.noarch
openstack-nova-cert-2013.2.3-1.fc20.noarch
openstack-nova-novncproxy-2013.2.3-1.fc20.noarch
openstack-ceilometer-common-2013.2.3-1.fc20.noarch
openstack-neutron-2013.2.2-2.fc20.noarch