Parameterize network type and tunnel types

Remove the hardcoding of gre as the Neutron tenant network type for the
Overcloud. This will enable the ability to deploy an Overcloud that uses
vxlan instead of gre tunnels. A new parameter, NeutronTunnelTypes, is
added to allow configuring the tunnel_types parameter in the Neutron ML2
configuration.

This change is required by https://review.openstack.org/#/c/92913

Change-Id: I2c2e2153a61349e58ada28c87aa2338c9f00e7bd

nova-compute-config.yaml

@@ -38,6 +38,7 @@ resources:
           ovs:
             local_ip: {get_input: neutron_local_ip}
             tenant_network_type: {get_input: neutron_tenant_network_type}
+            tunnel_types: {get_input: neutron_tunnel_types}
             network_vlan_ranges: {get_input: neutron_network_vlan_ranges}
             bridge_mappings: {get_input: neutron_bridge_mappings}
             enable_tunneling: {get_input: neutron_enable_tunneling}

nova-compute-instance.yaml

@@ -84,6 +84,16 @@ parameters:
     default: ''
     description: A port to add to the NeutronPhysicalBridge.
     type: string
+  NeutronNetworkType:
+    default: 'gre'
+    description: The tenant network type for Neutron, either gre or vxlan.
+    type: string
+  NeutronTunnelTypes:
+    default: 'gre'
+    description: |
+        The tunnel types for the Neutron tenant network. To specify multiple
+        values, use a comma separated string, like so: 'gre,vxlan'
+    type: string
   RabbitHost:
     type: string
   RabbitUserName:
@@ -227,6 +237,7 @@ resources:
         neutron_dsn: {get_param: NeutronDSN}
         neutron_local_ip: {get_attr: [NovaCompute0, networks, ctlplane, 0]}
         neutron_tenant_network_type: {get_param: NeutronNetworkType}
+        neutron_tunnel_types: {get_param: NeutronTunnelTypes}
         neutron_network_vlan_ranges: {get_param: NeutronNetworkVLANRanges}
         neutron_bridge_mappings: {get_param: NeutronBridgeMappings}
         neutron_enable_tunneling: {get_param: NeutronEnableTunnelling}

overcloud-source.yaml

@@ -235,7 +235,17 @@ parameters:
     description: Neutron ID for ctlplane network.
   NeutronDnsmasqOptions:
     default: 'dhcp-option-force=26,1400'
-    description: Dnsmasq options for neutron-dhcp-agent. The default value here forces MTU to be set to 1400 to account for the gre tunnel overhead.
+    description: Dnsmasq options for neutron-dhcp-agent. The default value here forces MTU to be set to 1400 to account for the tunnel overhead.
+    type: string
+  NeutronNetworkType:
+    default: 'gre'
+    description: The tenant network type for Neutron, either gre or vxlan.
+    type: string
+  NeutronTunnelTypes:
+    default: 'gre'
+    description: |
+        The tunnel types for the Neutron tenant network. To specify multiple
+        values, use a comma separated string, like so: 'gre,vxlan'
     type: string
   controllerImage:
     type: string
@@ -393,7 +403,10 @@ resources:
             - - mysql://neutron:unset@
               - *compute_database_host
               - /ovs_neutron
-        NeutronNetworkType: "gre"
+        NeutronNetworkType:
+            get_param: NeutronNetworkType
+        NeutronTunnelTypes:
+            get_param: NeutronTunnelTypes
         NeutronEnableTunnelling: "True"
         NeutronFlatNetworks:
             get_param: NeutronFlatNetworks
@@ -580,7 +593,10 @@ resources:
             public_interface_tag:
               get_param: NeutronPublicInterfaceTag
             physical_bridge: br-ex
-            tenant_network_type: gre
+            tenant_network_type:
+              get_param: NeutronNetworkType
+            tunnel_types:
+              get_param: NeutronTunnelTypes
           ovs_db:
             Fn::Join:
               - ''