1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
|
#!/usr/bin/python
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
#
ANSIBLE_METADATA = {'status': ['preview'],
'supported_by': 'community',
'version': '1.0'}
DOCUMENTATION = '''
---
module: nxos_hsrp
version_added: "2.2"
short_description: Manages HSRP configuration on NX-OS switches.
description:
- Manages HSRP configuration on NX-OS switches.
extends_documentation_fragment: nxos
author:
- Jason Edelman (@jedelman8)
- Gabriele Gerbino (@GGabriele)
notes:
- HSRP feature needs to be enabled first on the system.
- SVIs must exist before using this module.
- Interface must be a L3 port before using this module.
- HSRP cannot be configured on loopback interfaces.
- MD5 authentication is only possible with HSRPv2 while it is ignored if
HSRPv1 is used instead, while it will not raise any error. Here we allow
MD5 authentication only with HSRPv2 in order to enforce better practice.
options:
group:
description:
- HSRP group number.
required: true
interface:
description:
- Full name of interface that is being managed for HSRP.
required: true
version:
description:
- HSRP version.
required: false
default: 2
choices: ['1','2']
priority:
description:
- HSRP priority.
required: false
default: null
vip:
description:
- HSRP virtual IP address.
required: false
default: null
auth_string:
description:
- Authentication string.
required: false
default: null
auth_type:
description:
- Authentication type.
required: false
default: null
choices: ['text','md5']
state:
description:
- Specify desired state of the resource.
required: false
choices: ['present','absent']
default: 'present'
'''
EXAMPLES = '''
- name: Ensure HSRP is configured with following params on a SVI
nxos_hsrp:
group: 10
vip: 10.1.1.1
priority: 150
interface: vlan10
preempt: enabled
host: 68.170.147.165
- name: Ensure HSRP is configured with following params on a SVI
nxos_hsrp:
group: 10
vip: 10.1.1.1
priority: 150
interface: vlan10
preempt: enabled
host: 68.170.147.165
auth_type: text
auth_string: CISCO
- name: Remove HSRP config for given interface, group, and VIP
nxos_hsrp:
group: 10
interface: vlan10
vip: 10.1.1.1
host: 68.170.147.165
state: absent
'''
RETURN = '''
proposed:
description: k/v pairs of parameters passed into module
returned: always
type: dict
sample: {"group": "30", "version": "2", "vip": "10.30.1.1"}
existing:
description: k/v pairs of existing hsrp info on the interface
type: dict
sample: {}
end_state:
description: k/v pairs of hsrp after module execution
returned: always
type: dict
sample: {"auth_string": "cisco", "auth_type": "text",
"group": "30", "interface": "vlan10", "preempt": "disabled",
"priority": "100", "version": "2", "vip": "10.30.1.1"}
updates:
description: commands sent to the device
returned: always
type: list
sample: ["interface vlan10", "hsrp version 2", "hsrp 30", "ip 10.30.1.1"]
changed:
description: check to see if a change was made on the device
returned: always
type: boolean
sample: true
'''
import json
# COMMON CODE FOR MIGRATION
import ansible.module_utils.nxos
from ansible.module_utils.basic import get_exception
from ansible.module_utils.netcfg import NetworkConfig, ConfigLine
from ansible.module_utils.shell import ShellError
from ansible.module_utils.network import NetworkModule
def to_list(val):
if isinstance(val, (list, tuple)):
return list(val)
elif val is not None:
return [val]
else:
return list()
class CustomNetworkConfig(NetworkConfig):
def expand_section(self, configobj, S=None):
if S is None:
S = list()
S.append(configobj)
for child in configobj.children:
if child in S:
continue
self.expand_section(child, S)
return S
def get_object(self, path):
for item in self.items:
if item.text == path[-1]:
parents = [p.text for p in item.parents]
if parents == path[:-1]:
return item
def to_block(self, section):
return '\n'.join([item.raw for item in section])
def get_section(self, path):
try:
section = self.get_section_objects(path)
return self.to_block(section)
except ValueError:
return list()
def get_section_objects(self, path):
if not isinstance(path, list):
path = [path]
obj = self.get_object(path)
if not obj:
raise ValueError('path does not exist in config')
return self.expand_section(obj)
def add(self, lines, parents=None):
"""Adds one or lines of configuration
"""
ancestors = list()
offset = 0
obj = None
## global config command
if not parents:
for line in to_list(lines):
item = ConfigLine(line)
item.raw = line
if item not in self.items:
self.items.append(item)
else:
for index, p in enumerate(parents):
try:
i = index + 1
obj = self.get_section_objects(parents[:i])[0]
ancestors.append(obj)
except ValueError:
# add parent to config
offset = index * self.indent
obj = ConfigLine(p)
obj.raw = p.rjust(len(p) + offset)
if ancestors:
obj.parents = list(ancestors)
ancestors[-1].children.append(obj)
self.items.append(obj)
ancestors.append(obj)
# add child objects
for line in to_list(lines):
# check if child already exists
for child in ancestors[-1].children:
if child.text == line:
break
else:
offset = len(parents) * self.indent
item = ConfigLine(line)
item.raw = line.rjust(len(line) + offset)
item.parents = ancestors
ancestors[-1].children.append(item)
self.items.append(item)
def get_network_module(**kwargs):
try:
return get_module(**kwargs)
except NameError:
return NetworkModule(**kwargs)
def get_config(module, include_defaults=False):
config = module.params['config']
if not config:
try:
config = module.get_config()
except AttributeError:
defaults = module.params['include_defaults']
config = module.config.get_config(include_defaults=defaults)
return CustomNetworkConfig(indent=2, contents=config)
def load_config(module, candidate):
config = get_config(module)
commands = candidate.difference(config)
commands = [str(c).strip() for c in commands]
save_config = module.params['save']
result = dict(changed=False)
if commands:
if not module.check_mode:
try:
module.configure(commands)
except AttributeError:
module.config(commands)
if save_config:
try:
module.config.save_config()
except AttributeError:
module.execute(['copy running-config startup-config'])
result['changed'] = True
result['updates'] = commands
return result
# END OF COMMON CODE
def execute_config_command(commands, module):
try:
output = module.configure(commands)
except ShellError:
clie = get_exception()
module.fail_json(msg='Error sending CLI commands',
error=str(clie), commands=commands)
except AttributeError:
try:
commands.insert(0, 'configure')
module.cli.add_commands(commands, output='config')
output = module.cli.run_commands()
except ShellError:
clie = get_exception()
module.fail_json(msg='Error sending CLI commands',
error=str(clie), commands=commands)
return output
def get_cli_body_ssh(command, response, module):
"""Get response for when transport=cli. This is kind of a hack and mainly
needed because these modules were originally written for NX-API. And
not every command supports "| json" when using cli/ssh. As such, we assume
if | json returns an XML string, it is a valid command, but that the
resource doesn't exist yet. Instead, the output will be a raw string
when issuing commands containing 'show run'.
"""
if 'xml' in response[0]:
body = []
elif 'show run' in command:
body = response
else:
try:
response = response[0].replace(command + '\n\n', '').strip()
body = [json.loads(response)]
except ValueError:
module.fail_json(msg='Command does not support JSON output',
command=command)
return body
def execute_show(cmds, module, command_type=None):
command_type_map = {
'cli_show': 'json',
'cli_show_ascii': 'text'
}
try:
if command_type:
response = module.execute(cmds, command_type=command_type)
else:
response = module.execute(cmds)
except ShellError:
clie = get_exception()
module.fail_json(msg='Error sending {0}'.format(cmds),
error=str(clie))
except AttributeError:
try:
if command_type:
command_type = command_type_map.get(command_type)
module.cli.add_commands(cmds, output=command_type)
response = module.cli.run_commands()
else:
module.cli.add_commands(cmds, raw=True)
response = module.cli.run_commands()
except ShellError:
clie = get_exception()
module.fail_json(msg='Error sending {0}'.format(cmds),
error=str(clie))
return response
def execute_show_command(command, module, command_type='cli_show'):
if module.params['transport'] == 'cli':
command += ' | json'
cmds = [command]
response = execute_show(cmds, module)
body = get_cli_body_ssh(command, response, module)
elif module.params['transport'] == 'nxapi':
cmds = [command]
body = execute_show(cmds, module, command_type=command_type)
return body
def apply_key_map(key_map, table):
new_dict = {}
for key, value in table.items():
new_key = key_map.get(key)
if new_key:
value = table.get(key)
if value:
new_dict[new_key] = str(value)
else:
new_dict[new_key] = value
return new_dict
def get_interface_type(interface):
if interface.upper().startswith('ET'):
return 'ethernet'
elif interface.upper().startswith('VL'):
return 'svi'
elif interface.upper().startswith('LO'):
return 'loopback'
elif interface.upper().startswith('MG'):
return 'management'
elif interface.upper().startswith('MA'):
return 'management'
elif interface.upper().startswith('PO'):
return 'portchannel'
else:
return 'unknown'
def get_interface_mode(interface, intf_type, module):
command = 'show interface {0}'.format(interface)
interface = {}
mode = 'unknown'
if intf_type in ['ethernet', 'portchannel']:
body = execute_show_command(command, module)[0]
interface_table = body['TABLE_interface']['ROW_interface']
mode = str(interface_table.get('eth_mode', 'layer3'))
if mode == 'access' or mode == 'trunk':
mode = 'layer2'
elif intf_type == 'svi':
mode = 'layer3'
return mode
def get_hsrp_groups_on_interfaces(device, module):
command = 'show hsrp all'
body = execute_show_command(command, module)
hsrp = {}
try:
get_data = body[0]['TABLE_grp_detail']['ROW_grp_detail']
except (KeyError, AttributeError):
return {}
for entry in get_data:
interface = str(entry['sh_if_index'].lower())
value = hsrp.get(interface, 'new')
if value == 'new':
hsrp[interface] = []
group = str(entry['sh_group_num'])
hsrp[interface].append(group)
return hsrp
def get_hsrp_group(group, interface, module):
command = 'show hsrp group {0}'.format(group)
body = execute_show_command(command, module)
hsrp = {}
hsrp_key = {
'sh_if_index': 'interface',
'sh_group_num': 'group',
'sh_group_version': 'version',
'sh_cfg_prio': 'priority',
'sh_preempt': 'preempt',
'sh_vip': 'vip',
'sh_authentication_type': 'auth_type',
'sh_authentication_data': 'auth_string'
}
try:
hsrp_table = body[0]['TABLE_grp_detail']['ROW_grp_detail']
except (AttributeError, IndexError, TypeError):
return {}
if isinstance(hsrp_table, dict):
hsrp_table = [hsrp_table]
for hsrp_group in hsrp_table:
parsed_hsrp = apply_key_map(hsrp_key, hsrp_group)
parsed_hsrp['interface'] = parsed_hsrp['interface'].lower()
if parsed_hsrp['version'] == 'v1':
parsed_hsrp['version'] = '1'
elif parsed_hsrp['version'] == 'v2':
parsed_hsrp['version'] = '2'
if parsed_hsrp['interface'] == interface:
return parsed_hsrp
return hsrp
def get_commands_remove_hsrp(group, interface):
commands = []
commands.append('interface {0}'.format(interface))
commands.append('no hsrp {0}'.format(group))
return commands
def get_commands_config_hsrp(delta, interface, args):
commands = []
config_args = {
'group': 'hsrp {group}',
'priority': 'priority {priority}',
'preempt': '{preempt}',
'vip': 'ip {vip}'
}
preempt = delta.get('preempt', None)
group = delta.get('group', None)
if preempt:
if preempt == 'enabled':
delta['preempt'] = 'preempt'
elif preempt == 'disabled':
delta['preempt'] = 'no preempt'
for key, value in delta.iteritems():
command = config_args.get(key, 'DNE').format(**delta)
if command and command != 'DNE':
if key == 'group':
commands.insert(0, command)
else:
commands.append(command)
command = None
auth_type = delta.get('auth_type', None)
auth_string = delta.get('auth_string', None)
if auth_type or auth_string:
if not auth_type:
auth_type = args['auth_type']
elif not auth_string:
auth_string = args['auth_string']
if auth_type == 'md5':
command = 'authentication md5 key-string {0}'.format(auth_string)
commands.append(command)
elif auth_type == 'text':
command = 'authentication text {0}'.format(auth_string)
commands.append(command)
if commands and not group:
commands.insert(0, 'hsrp {0}'.format(args['group']))
version = delta.get('version', None)
if version:
if version == '2':
command = 'hsrp version 2'
elif version == '1':
command = 'hsrp version 1'
commands.insert(0, command)
commands.insert(0, 'interface {0}'.format(interface))
if commands:
if not commands[0].startswith('interface'):
commands.insert(0, 'interface {0}'.format(interface))
return commands
def is_default(interface, module):
command = 'show run interface {0}'.format(interface)
try:
body = execute_show_command(command, module)[0]
if 'invalid' in body.lower():
return 'DNE'
else:
raw_list = body.split('\n')
if raw_list[-1].startswith('interface'):
return True
else:
return False
except (KeyError):
return 'DNE'
def validate_config(body, vip, module):
new_body = ''.join(body)
if "invalid ip address" in new_body.lower():
module.fail_json(msg="Invalid VIP. Possible duplicate IP address.",
vip=vip)
def validate_params(param, module):
value = module.params[param]
version = module.params['version']
if param == 'group':
try:
if (int(value) < 0 or int(value) > 255) and version == '1':
raise ValueError
elif int(value) < 0 or int(value) > 4095:
raise ValueError
except ValueError:
module.fail_json(msg="Warning! 'group' must be an integer between"
" 0 and 255 when version 1 and up to 4095 "
"when version 2.", group=value,
version=version)
elif param == 'priority':
try:
if (int(value) < 0 or int(value) > 255):
raise ValueError
except ValueError:
module.fail_json(msg="Warning! 'priority' must be an integer "
"between 0 and 255", priority=value)
def main():
argument_spec = dict(
group=dict(required=True, type='str'),
interface=dict(required=True),
version=dict(choices=['1', '2'], default='2', required=False),
priority=dict(type='str', required=False),
preempt=dict(type='str', choices=['disabled', 'enabled'],
required=False),
vip=dict(type='str', required=False),
auth_type=dict(choices=['text', 'md5'], required=False),
auth_string=dict(type='str', required=False),
state=dict(choices=['absent', 'present'], required=False,
default='present'),
include_defaults=dict(default=True),
config=dict(),
save=dict(type='bool', default=False)
)
module = get_network_module(argument_spec=argument_spec,
supports_check_mode=True)
interface = module.params['interface'].lower()
group = module.params['group']
version = module.params['version']
state = module.params['state']
priority = module.params['priority']
preempt = module.params['preempt']
vip = module.params['vip']
auth_type = module.params['auth_type']
auth_string = module.params['auth_string']
transport = module.params['transport']
if state == 'present' and not vip:
module.fail_json(msg='the "vip" param is required when state=present')
for param in ['group', 'priority']:
if module.params[param] is not None:
validate_params(param, module)
intf_type = get_interface_type(interface)
if (intf_type != 'ethernet' and transport == 'cli'):
if is_default(interface, module) == 'DNE':
module.fail_json(msg='That interface does not exist yet. Create '
'it first.', interface=interface)
if intf_type == 'loopback':
module.fail_json(msg="Loopback interfaces don't support HSRP.",
interface=interface)
mode = get_interface_mode(interface, intf_type, module)
if mode == 'layer2':
module.fail_json(msg='That interface is a layer2 port.\nMake it '
'a layer 3 port first.', interface=interface)
if auth_type or auth_string:
if not (auth_type and auth_string):
module.fail_json(msg='When using auth parameters, you need BOTH '
'auth_type AND auth_string.')
args = dict(group=group, version=version, priority=priority,
preempt=preempt, vip=vip, auth_type=auth_type,
auth_string=auth_string)
proposed = dict((k, v) for k, v in args.iteritems() if v is not None)
existing = get_hsrp_group(group, interface, module)
# This will enforce better practice with md5 and hsrp version.
if proposed.get('auth_type', None) == 'md5':
if proposed['version'] == '1':
module.fail_json(msg="It's recommended to use HSRP v2 "
"when auth_type=md5")
elif not proposed.get('auth_type', None) and existing:
if (proposed['version'] == '1' and
existing['auth_type'] == 'md5'):
module.fail_json(msg="Existing auth_type is md5. It's recommended "
"to use HSRP v2 when using md5")
changed = False
end_state = existing
commands = []
if state == 'present':
delta = dict(
set(proposed.iteritems()).difference(existing.iteritems()))
if delta:
command = get_commands_config_hsrp(delta, interface, args)
commands.extend(command)
elif state == 'absent':
if existing:
command = get_commands_remove_hsrp(group, interface)
commands.extend(command)
if commands:
if module.check_mode:
module.exit_json(changed=True, commands=commands)
else:
body = execute_config_command(commands, module)
if transport == 'cli':
validate_config(body, vip, module)
changed = True
end_state = get_hsrp_group(group, interface, module)
if 'configure' in commands:
commands.pop(0)
results = {}
results['proposed'] = proposed
results['existing'] = existing
results['end_state'] = end_state
results['updates'] = commands
results['changed'] = changed
module.exit_json(**results)
if __name__ == '__main__':
main()
|