adds system_mtu argument to nxos_system (#21970)

* updates argument_spec
* adds unit test case

lib/ansible/modules/network/nxos/nxos_system.py

@@ -179,6 +179,9 @@ def map_obj_to_commands(want, have, module):
             cmd = 'no ip name-server %s' % item['server']
             remove(cmd, commands, item['vrf'])
 
+        if have['system_mtu']:
+            commands.append('no system jumbomtu')
+
     if state == 'present':
         if needs_update('hostname'):
             commands.append('hostname %s' % want['hostname'])
@@ -213,6 +216,9 @@ def map_obj_to_commands(want, have, module):
                 cmd = 'ip name-server %s' % item['server']
                 add(cmd, commands, item['vrf'])
 
+        if needs_update('system_mtu'):
+            commands.append('system jumbomtu %s' % want['system_mtu'])
+
     return commands
 
 def parse_hostname(config):
@@ -262,6 +268,11 @@ def parse_name_servers(config, vrf_config):
 
     return objects
 
+def parse_system_mtu(config):
+    match = re.search('^system jumbomtu (\d+)', config, re.M)
+    if match:
+        return int(match.group(1))
+
 def map_config_to_obj(module):
     config = get_config(module)
     configobj = NetworkConfig(indent=2, contents=config)
@@ -278,13 +289,19 @@ def map_config_to_obj(module):
         'domain_lookup': 'no ip domain-lookup' not in config,
         'domain_name': parse_domain_name(config, vrf_config),
         'domain_search': parse_domain_search(config, vrf_config),
-        'name_servers': parse_name_servers(config, vrf_config)
+        'name_servers': parse_name_servers(config, vrf_config),
+        'system_mtu': parse_system_mtu(config)
     }
 
+def validate_system_mtu(value, module):
+    if not 1500 <= value <= 9216:
+        module.fail_json(msg='system_mtu must be between 1500 and 9216')
+
 def map_params_to_obj(module):
     obj = {
         'hostname': module.params['hostname'],
         'domain_lookup': module.params['domain_lookup'],
+        'system_mtu': module.params['system_mtu']
     }
 
     domain_name = ComplexList(dict(
@@ -327,6 +344,8 @@ def main():
         # { server: <str>; vrf: <str> }
         name_servers=dict(type='list'),
 
+        system_mtu=dict(type='int'),
+
         state=dict(default='present', choices=['present', 'absent'])
     )
 

test/units/modules/network/nxos/fixtures/nxos_system_config.cfg

@@ -1,4 +1,5 @@
 hostname nxos01
+system jumbomtu 1500
 !
 no ip domain-lookup
 ip domain-name ansible.com

test/units/modules/network/nxos/test_nxos_system.py

@@ -109,6 +109,11 @@ class TestNxosSystemModule(TestNxosModule):
                     'vrf context management', 'ip name-server 1.2.3.4', 'exit']
         self.execute_module(changed=True, commands=commands)
 
+    def test_nxos_system_system_mtu(self):
+        set_module_args(dict(system_mtu=2000))
+        commands = ['system jumbomtu 2000']
+        self.execute_module(changed=True, commands=commands)
+
     def test_nxos_system_state_absent(self):
         set_module_args(dict(state='absent'))
         commands = ['no hostname', 'no ip domain-name ansible.com',
@@ -118,7 +123,8 @@ class TestNxosSystemModule(TestNxosModule):
                     'vrf context management', 'no ip domain-list redhat.com', 'exit',
                     'no ip name-server 8.8.8.8', 'no ip name-server 172.26.1.1',
                     'vrf context management', 'no ip name-server 8.8.8.8', 'exit',
-                    'vrf context management', 'no ip name-server 172.26.1.1', 'exit']
+                    'vrf context management', 'no ip name-server 172.26.1.1', 'exit',
+                    'no system jumbomtu']
         self.execute_module(changed=True, commands=commands)