config option to set of_inactivity_probe

This patch adds support for setting of-inactivity-probe in
/etc/neutron/plugins/ml2/openvswitch_agent.ini

[ovs]
of_inactivity_probe = 10

Change-Id: Idb3ab6b0e82200226e3063065192b4346d0c5206
Closes-Bug: 1852582

config.yaml

@@ -403,3 +403,10 @@ options:
       option defines how frequently this check is performed. Setting this value
       to 0 will disable the healthchecks. Note that this only applies when
       using l3ha and dvr_snat.
+  of-inactivity-probe:
+    type: int
+    default: 10
+    description: |
+      The inactivity_probe interval in seconds for the local switch connection
+      to the controller. A value of 0 disables inactivity probes. Used only
+      for 'native' driver. The default value is 10 seconds.

hooks/neutron_ovs_context.py

@@ -259,6 +259,8 @@ class OVSPluginContext(context.NeutronContext):
         if ovs_ctxt['firewall_driver'] != OPENVSWITCH:
             ovs_ctxt['enable_nsg_logging'] = False
 
+        ovs_ctxt['of_inactivity_probe'] = config('of-inactivity-probe')
+
         return ovs_ctxt
 
 

templates/queens/openvswitch_agent.ini

@@ -12,6 +12,7 @@ bridge_mappings = {{ bridge_mappings }}
 datapath_type = netdev
 vhostuser_socket_dir = /run/libvirt-vhost-user
 {% endif -%}
+of_inactivity_probe = {{ of_inactivity_probe }}
 
 [agent]
 tunnel_types = {{ overlay_network_type }}

unit_tests/test_neutron_ovs_context.py

@@ -134,7 +134,8 @@ class OVSPluginContextTest(CharmTestCase):
                   'security-group-log-output-base': '/var/log/nsg.log',
                   'security-group-log-rate-limit': None,
                   'security-group-log-burst-limit': 25,
-                  'keepalived-healthcheck-interval': 0}
+                  'keepalived-healthcheck-interval': 0,
+                  'of-inactivity-probe': 10}
 
         def mock_config(key=None):
             if key:
@@ -193,6 +194,7 @@ class OVSPluginContextTest(CharmTestCase):
             'nsg_log_rate_limit': None,
             'nsg_log_burst_limit': 25,
             'keepalived_healthcheck_interval': 0,
+            'of_inactivity_probe': 10,
         }
         self.assertEqual(expect, napi_ctxt())
 
@@ -274,6 +276,7 @@ class OVSPluginContextTest(CharmTestCase):
             'nsg_log_rate_limit': None,
             'nsg_log_burst_limit': 25,
             'keepalived_healthcheck_interval': 30,
+            'of_inactivity_probe': 10,
         }
         self.maxDiff = None
         self.assertEqual(expect, napi_ctxt())