Add ability to define bridge type for containers

This change allows to define `container_bridge_type` among provider_networks to
provide type of bridge being used (ie ovs).

Documentaion on usage will be provided in following patch.

Needed-By: https://review.opendev.org/c/openstack/openstack-ansible-lxc_container_create/+/837734
Change-Id: I4f65c13a7dd16a66b2b14ae545516533f5ec69e1

doc/source/reference/architecture/container-networking.rst

@@ -26,20 +26,21 @@ the same multiport network card for the same bonded interface, because a
 network card failure affects both of the physical network interfaces used by
 the bond.
 
-Linux bridges
+Linux bridges/switches
-~~~~~~~~~~~~~
+~~~~~~~~~~~~~~~~~~~~~~
 
 The combination of containers and flexible deployment options requires
-implementation of advanced Linux networking features, such as bridges and
+implementation of advanced Linux networking features, such as bridges,
-namespaces.
+switches and namespaces.
 
-* Bridges provide layer 2 connectivity (similar to switches) among
+* Bridges/switches provide layer 2 connectivity (similar to switches) among
   physical, logical, and virtual network interfaces within a host. After
-  a bridge is created, the network interfaces are virtually plugged in to
+  a bridge/switch is created, the network interfaces are virtually plugged
-  it.
+  in to it.
 
-  OpenStack-Ansible uses bridges to connect physical and logical network
+  OpenStack-Ansible can use linux bridges or openvswitches to connect
-  interfaces on the host to virtual network interfaces within containers.
+  physical and logical network interfaces on the host to virtual network
+  interfaces within containers.
 
 * Namespaces provide logically separate layer 3 environments (similar to
   routers) within a host. Namespaces use virtual interfaces to connect

etc/netplan/01-static.yml

@@ -48,6 +48,7 @@ network:
             interfaces:
             - bond0.20
             mtu: 9000
+            openvswitch: {}
         br-vxlan:
             addresses:
             - 172.29.240.10/22

etc/openstack_deploy/openstack_user_config.yml.example

@@ -138,6 +138,11 @@
 #       Name of unique bridge on target hosts to use for this network. Typical
 #       values include 'br-mgmt', 'br-storage', 'br-vlan', 'br-vxlan', etc.
 #
+#       Option: container_bridge_type (optional, string)
+#       Type of container_bridge on target hosts. This option should only set
+#       to "openvswitch" when the container_bridge is set up with openvswitch.
+#       The default value is undefined, which means bridge type is linux bridge.
+#
 #       Option: container_interface (required, string)
 #       Name of unique interface in containers to use for this network.
 #       Typical values include 'eth1', 'eth2', etc. This option is OPTIONAL

osa_toolkit/generate.py

@@ -527,7 +527,7 @@ def skel_load(skeleton, inventory):
 
 
 def network_entry(is_metal, interface,
-                  bridge=None, net_type=None, net_mtu=None):
+                  bridge=None, bridge_type=None, net_type=None, net_mtu=None):
     """Return a network entry for a container."""
 
     # TODO(cloudnull) After a few releases this conditional should be
@@ -542,6 +542,9 @@ def network_entry(is_metal, interface,
     if bridge:
         _network['bridge'] = bridge
 
+    if bridge_type:
+        _network['bridge_type'] = bridge_type
+
     if net_type:
         _network['type'] = net_type
 
@@ -552,9 +555,9 @@ def network_entry(is_metal, interface,
 
 
 def _add_additional_networks(key, inventory, ip_q, q_name, netmask, interface,
-                             bridge, net_type, net_mtu, user_config,
+                             bridge, bridge_type, net_type, net_mtu,
-                             is_container_address, static_routes, gateway,
+                             user_config, is_container_address, static_routes,
-                             reference_group, address_prefix):
+                             gateway, reference_group, address_prefix):
     """Process additional ip adds and append then to hosts as needed.
 
     If the host is found to be "is_metal" it will be marked as "on_metal"
@@ -588,6 +591,7 @@ def _add_additional_networks(key, inventory, ip_q, q_name, netmask, interface,
                 netmask,
                 interface,
                 bridge,
+                bridge_type,
                 net_type,
                 net_mtu,
                 user_config,
@@ -640,6 +644,7 @@ def _add_additional_networks(key, inventory, ip_q, q_name, netmask, interface,
             is_metal,
             interface,
             bridge,
+            bridge_type,
             net_type,
             net_mtu
         )
@@ -766,6 +771,7 @@ def container_skel_load(container_skel, inventory, config):
                     netmask=netmask,
                     interface=p_net.get('container_interface'),
                     bridge=p_net.get('container_bridge'),
+                    bridge_type=p_net.get('container_bridge_type'),
                     net_type=p_net.get('container_type'),
                     net_mtu=p_net.get('container_mtu'),
                     user_config=config,