Merge "Make neutron dhcp agents per network conditional"

puppet/services/neutron-base.yaml

@@ -24,7 +24,7 @@ parameters:
     type: number
   NeutronDhcpAgentsPerNetwork:
     type: number
-    default: 3
+    default: 0
     description: The number of neutron dhcp agents to schedule per network
   NeutronCorePlugin:
     default: 'ml2'
@@ -72,17 +72,20 @@ parameters:
                  via parameter_defaults in the resource registry.
     type: json
 
+conditions:
+  dhcp_agents_zero: {equals : [{get_param: NeutronDhcpAgentsPerNetwork}, 0]}
+
 outputs:
   role_data:
     description: Role data for the Neutron base service.
     value:
       service_name: neutron_base
       config_settings:
-        neutron::rabbit_password: {get_param: RabbitPassword}
+        map_merge:
+          - neutron::rabbit_password: {get_param: RabbitPassword}
             neutron::rabbit_user: {get_param: RabbitUserName}
             neutron::rabbit_use_ssl: {get_param: RabbitClientUseSSL}
             neutron::rabbit_port: {get_param: RabbitClientPort}
-        neutron::dhcp_agents_per_network: {get_param: NeutronDhcpAgentsPerNetwork}
             neutron::core_plugin: {get_param: NeutronCorePlugin}
             neutron::service_plugins: {get_param: NeutronServicePlugins}
             neutron::debug: {get_param: Debug}
@@ -93,3 +96,7 @@ outputs:
             neutron::db::database_db_max_retries: -1
             neutron::db::database_max_retries: -1
             neutron::global_physnet_mtu: {get_param: NeutronGlobalPhysnetMtu}
+          - if:
+            - dhcp_agents_zero
+            - {}
+            - tripleo::profile::base::neutron::dhcp_agents_per_network: {get_param: NeutronDhcpAgentsPerNetwork}

releasenotes/notes/allow-neutron-dhcp-agents-per-network-calculation-536c70391497256d.yaml

@@ -0,0 +1,8 @@
+---
+fixes:
+  - |
+    NeutronDhcpAgents had a default value of 3 that, even though unused in
+    practice was a bad default value. Changing the default value to a
+    sentinel value and making the hiera conditional allows deploy-time
+    logic in puppet to provide a default value based on the number of dhcp
+    agents being deployed.