turn neutron notifications off by default

unless something (ceilometer) is going to consume the notification
messages, we should turn notifications off.  This commit follows the
same pattern that the other roles use for enabling/disabling
notifications.

Bug: #1522042
Change-Id: If6d4f0fd1c441a6bd8dc48f6bea8a4906a9d96b2

doc/source/install-guide/configure-ceilometer.rst

@@ -178,6 +178,8 @@ This configures glance to send notifications to the message bus:
 This configures nova to send notifications to the message bus:
 ``nova_ceilometer_enabled: False``
 
+This configures neutron to send notifications to the message bus:
+``neutron_ceilometer_enabled: False``
 
 Once all of these steps are complete, you are ready to run the
 os-ceilometer-install.yml playbook! Or, if deploying a new stack, simply run

etc/openstack_deploy/user_variables.yml

@@ -23,6 +23,7 @@ heat_ceilometer_enabled: False
 cinder_ceilometer_enabled: False
 glance_ceilometer_enabled: False
 nova_ceilometer_enabled: False
+neutron_ceilometer_enabled: False
 
 ## Aodh Options
 aodh_db_type: mongodb

playbooks/roles/os_neutron/defaults/main.yml

@@ -168,7 +168,7 @@ neutron_driver_loadbalancer_pool_scheduler: neutron_lbaas.services.loadbalancer.
 neutron_driver_interface: neutron.agent.linux.interface.BridgeInterfaceDriver
 neutron_driver_metering: neutron.services.metering.drivers.iptables.iptables_driver.IptablesMeteringDriver
 neutron_driver_dhcp: neutron.agent.linux.dhcp.Dnsmasq
-neutron_driver_notification: neutron.openstack.common.notifier.rpc_notifier
+neutron_driver_notification: messagingv2
 neutron_driver_quota: neutron.db.quota.driver.DbQuotaDriver
 neutron_driver_firewall: neutron.agent.linux.iptables_firewall.IptablesFirewallDriver
 

playbooks/roles/os_neutron/templates/neutron.conf.j2

@@ -17,6 +17,11 @@ network_device_mtu = {{ neutron_network_device_mtu }}
 allow_overlapping_ips = True
 vlan_transparent = False
 
+#Ceilometer configurations
+{% if neutron_ceilometer_enabled %}
+notification_driver = {{ neutron_driver_notification }}
+{% endif %}
+
 # Plugins
 core_plugin = {{ neutron_plugin_core }}
 {% if neutron_plugin_type != 'plumgrid' %}
@@ -34,7 +39,6 @@ auth_strategy = keystone
 network_scheduler_driver = {{ neutron_driver_network_scheduler }}
 router_scheduler_driver = {{ neutron_driver_router_scheduler }}
 loadbalancer_pool_scheduler_driver = {{ neutron_driver_loadbalancer_pool_scheduler }}
-notification_driver = {{ neutron_driver_notification }}
 
 # Schedulers
 network_auto_schedule = True