Add dvr support

hooks/quantum_contexts.py

@@ -111,6 +111,7 @@ def _neutron_api_settings():
     '''
     neutron_settings = {
         'l2_population': False,
+        'enable_dvr': False,
         'overlay_network_type': 'gre',
 
     }
@@ -119,10 +120,11 @@ def _neutron_api_settings():
             rdata = relation_get(rid=rid, unit=unit)
             if 'l2-population' not in rdata:
                 continue
-            neutron_settings = {
-                'l2_population': rdata['l2-population'],
-                'overlay_network_type': rdata['overlay-network-type'],
-            }
+            neutron_settings['l2_population'] = rdata['l2-population']
+            if 'overlay-network-type' in rdata:
+                neutron_settings['overlay_network_type'] = rdata['overlay-network-type']
+            if 'enable-dvr' in rdata:
+                neutron_settings['enable_dvr'] = rdata['enable-dvr']
             return neutron_settings
     return neutron_settings
 
@@ -158,6 +160,7 @@ class NetworkServiceContext(OSContextGenerator):
 class L3AgentContext(OSContextGenerator):
 
     def __call__(self):
+        neutron_api_settings = _neutron_api_settings()
         ctxt = {}
         if config('run-internal-router') == 'leader':
             ctxt['handle_internal_only_router'] = eligible_leader(None)
@@ -170,9 +173,12 @@ class L3AgentContext(OSContextGenerator):
 
         if config('external-network-id'):
             ctxt['ext_net_id'] = config('external-network-id')
-
         if config('plugin'):
             ctxt['plugin'] = config('plugin')
+        if neutron_api_settings['enable_dvr'] == 'True':
+            ctxt['agent_mode'] = 'dvr_snat'
+        else:
+            ctxt['agent_mode'] = 'legacy'
         return ctxt
 
 
@@ -243,6 +249,7 @@ class QuantumGatewayContext(OSContextGenerator):
             'verbose': config('verbose'),
             'instance_mtu': config('instance-mtu'),
             'l2_population': neutron_api_settings['l2_population'],
+            'enable_dvr': neutron_api_settings['enable_dvr'],
             'overlay_network_type':
             neutron_api_settings['overlay_network_type'],
         }

hooks/quantum_utils.py

@@ -413,6 +413,9 @@ def register_configs():
         drop_config = NEUTRON_ML2_PLUGIN_CONF
         if release >= 'icehouse':
             drop_config = NEUTRON_OVS_PLUGIN_CONF
+            # NOTE(gnuoy) neutron-vpn-agent supercedes l3-agent for icehouse
+            CONFIG_FILES[name][plugin][NEUTRON_L3_AGENT_CONF]['services'] = \
+                ['neutron-vpn-agent']
         if drop_config in CONFIG_FILES[name][plugin]:
             CONFIG_FILES[name][plugin].pop(drop_config)
 

templates/juno/l3_agent.ini

@@ -0,0 +1,25 @@
+###############################################################################
+# [ WARNING ]
+# Configuration file maintained by Juju. Local changes may be overwritten.
+###############################################################################
+[DEFAULT]
+interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver
+auth_url = {{ service_protocol }}://{{ keystone_host }}:{{ service_port }}/v2.0
+auth_region = {{ region }}
+admin_tenant_name = {{ service_tenant }}
+admin_user = {{ service_username }}
+admin_password = {{ service_password }}
+root_helper = sudo /usr/bin/neutron-rootwrap /etc/neutron/rootwrap.conf
+handle_internal_only_routers = {{ handle_internal_only_router }}
+{% if plugin == 'n1kv' %}
+l3_agent_manager = neutron.agent.l3_agent.L3NATAgentWithStateReport
+external_network_bridge = br-int
+ovs_use_veth = False
+use_namespaces = True
+{% else %}
+ovs_use_veth = True
+{% endif %}
+{% if ext_net_id -%}
+gateway_external_network_id = {{ ext_net_id }}
+{% endif -%}
+agent_mode = {{ agent_mode }}

templates/juno/ml2_conf.ini

@@ -0,0 +1,33 @@
+###############################################################################
+# [ WARNING ]
+# Configuration file maintained by Juju. Local changes may be overwritten.
+###############################################################################
+[ml2]
+type_drivers = gre,vxlan,vlan,flat
+tenant_network_types = gre,vxlan,vlan,flat
+mechanism_drivers = openvswitch,l2population
+
+[ml2_type_gre]
+tunnel_id_ranges = 1:1000
+
+[ml2_type_vxlan]
+vni_ranges = 1001:2000
+
+[ml2_type_vlan]
+network_vlan_ranges = physnet1:1000:2000
+
+[ml2_type_flat]
+flat_networks = physnet1
+
+[ovs]
+enable_tunneling = True
+local_ip = {{ local_ip }}
+bridge_mappings = physnet1:br-data
+
+[agent]
+tunnel_types = {{ overlay_network_type }}
+l2_population = {{ l2_population }}
+enable_distributed_routing = {{ enable_dvr }}
+
+[securitygroup]
+firewall_driver = neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver