Allow Undercloud to be deployed with Ml2 OVN

OVN is already default ML2 plugin in Overcloud since
Stein release[1]. OVN 22.06+ supports DHCP for IPv4 baremetal
ports so we can now use it instead of Ml2 OVS Services on
Undercloud.

This patch update roles and add environment file to allow
the Undercloud deployments with OVN.

Once upgrade/migration path is evaluated for Undercloud
from Ml2 OVS to Ml2 OVN we can consider switching default
Ml2 Plugin on Undercloud.

[1] https://review.opendev.org/c/openstack/tripleo-heat-templates/+/593056/

Change-Id: I724934f511a2d530521fd368e56e7bc2bcb07d76

environments/services/undercloud-neutron-ovn-dhcp.yaml

@@ -0,0 +1,26 @@
+# A Heat environment file which can be used to enable
+# neutron Ml2 OVN services on Undercloud
+resource_registry:
+  # OVN services
+  OS::TripleO::Services::NeutronMl2PluginBase: ../../deployment/neutron/neutron-plugin-ml2-ovn.yaml
+  OS::TripleO::Services::OVNController: ../../deployment/ovn/ovn-controller-container-puppet.yaml
+  OS::TripleO::Services::OVNDBs: ../../deployment/ovn/ovn-dbs-container-puppet.yaml
+  OS::TripleO::Services::OVNMetadataAgent: ../../deployment/ovn/ovn-metadata-container-puppet.yaml
+
+# Disabling Neutron services that overlap with OVN
+  OS::TripleO::Services::NeutronDhcpAgent: OS::Heat::None
+  OS::TripleO::Services::NeutronL3Agent: OS::Heat::None
+  OS::TripleO::Services::NeutronOvsAgent: OS::Heat::None
+
+parameter_defaults:
+  OVNNeutronSyncMode: log
+  NeutronRpcWorkers: 1
+  UndercloudParameters:
+    OVNCMSOptions: "enable-chassis-as-gw"
+  OVNDnsServers: []
+  DhcpAgentNotification: false
+  NeutronServicePlugins: 'ovn-router,segments'
+  NeutronMechanismDrivers: ['ovn', 'baremetal']
+  NeutronPluginExtensions: "port_security,dns"
+  NeutronNetworkType: ['geneve', 'vxlan', 'vlan', 'flat']
+  NeutronTypeDrivers: ['geneve', 'vxlan', 'vlan', 'flat']

environments/undercloud.yaml

@@ -14,6 +14,11 @@ resource_registry:
   OS::TripleO::Services::NeutronCorePlugin: ../deployment/neutron/neutron-plugin-ml2-container-puppet.yaml
   OS::TripleO::Services::NeutronMl2PluginBase: ../deployment/neutron/neutron-plugin-ml2.yaml
 
+  # Disable OVN services
+  OS::TripleO::Services::OVNController: OS::Heat::None
+  OS::TripleO::Services::OVNDBs: OS::Heat::None
+  OS::TripleO::Services::OVNMetadataAgent: OS::Heat::None
+
   OS::TripleO::Services::OpenStackClients: ../deployment/clients/openstack-clients-baremetal-ansible.yaml
   OS::TripleO::Services::HeatEphemeral: ../deployment/heat/heat-ephemeral-container-ansible.yaml
 

roles/Undercloud.yaml

@@ -42,6 +42,9 @@
     - OS::TripleO::Services::NeutronDhcpAgent
     - OS::TripleO::Services::NeutronL3Agent
     - OS::TripleO::Services::NeutronOvsAgent
+    - OS::TripleO::Services::OVNController
+    - OS::TripleO::Services::OVNDBs
+    - OS::TripleO::Services::OVNMetadataAgent
     - OS::TripleO::Services::OpenStackClients
     - OS::TripleO::Services::OsloMessagingNotify
     - OS::TripleO::Services::OsloMessagingRpc

roles_data_undercloud.yaml

@@ -45,6 +45,9 @@
     - OS::TripleO::Services::NeutronDhcpAgent
     - OS::TripleO::Services::NeutronL3Agent
     - OS::TripleO::Services::NeutronOvsAgent
+    - OS::TripleO::Services::OVNController
+    - OS::TripleO::Services::OVNDBs
+    - OS::TripleO::Services::OVNMetadataAgent
     - OS::TripleO::Services::OpenStackClients
     - OS::TripleO::Services::OsloMessagingNotify
     - OS::TripleO::Services::OsloMessagingRpc