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ansible/network/nxos/nxos_switchport.py
GGabriele ddd224fd0b Adding 2.1 and 2.2 support to nxos_switchport
2016-09-15 19:00:25 +02:00

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#!/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/>.
#
DOCUMENTATION = '''
---
module: nxos_switchport
version_added: "2.1"
short_description: Manages Layer 2 switchport interfaces.
extends_documentation_fragment: nxos
description:
- Manages Layer 2 interfaces
author: Jason Edelman (@jedelman8)
notes:
- When C(state=absent), VLANs can be added/removed from trunk links and
the existing access VLAN can be 'unconfigured' to just having VLAN 1
on that interface.
- When working with trunks VLANs the keywords add/remove are always sent
in the `switchport trunk allowed vlan` command. Use verbose mode to see
commands sent.
- When C(state=unconfigured), the interface will result with having a default
Layer 2 interface, i.e. vlan 1 in access mode.
options:
interface:
description:
- Full name of the interface, i.e. Ethernet1/1.
required: true
default: null
mode:
description:
- Mode for the Layer 2 port.
required: false
default: null
choices: ['access','trunk']
access_vlan:
description:
- If C(mode=access), used as the access VLAN ID.
required: false
default: null
native_vlan:
description:
- If C(mode=trunk), used as the trunk native VLAN ID.
required: false
default: null
trunk_vlans:
description:
- If C(mode=trunk), used as the VLAN range to ADD or REMOVE
from the trunk.
aliases:
- trunk_add_vlans
required: false
default: null
state:
description:
- Manage the state of the resource.
required: false
default: present
choices: ['present','absent', 'unconfigured']
trunk_allowed_vlans:
description:
- if C(mode=trunk), these are the only VLANs that will be
configured on the trunk, i.e. "2-10,15".
required: false
version_added: 2.2
default: null
'''
EXAMPLES = '''
# ENSURE Eth1/5 is in its default switchport state
- nxos_switchport: interface=eth1/5 state=unconfigured host={{ inventory_hostname }}
# ENSURE Eth1/5 is configured for access vlan 20
- nxos_switchport: interface=eth1/5 mode=access access_vlan=20 host={{ inventory_hostname }}
# ENSURE Eth1/5 only has vlans 5-10 as trunk vlans
- nxos_switchport: interface=eth1/5 mode=trunk native_vlan=10 trunk_vlans=5-10 host={{ inventory_hostname }}
# Ensure eth1/5 is a trunk port and ensure 2-50 are being tagged (doesn't mean others aren't also being tagged)
- nxos_switchport: interface=eth1/5 mode=trunk native_vlan=10 trunk_vlans=2-50 host={{ inventory_hostname }}
# Ensure these VLANs are not being tagged on the trunk
- nxos_switchport: interface=eth1/5 mode=trunk trunk_vlans=51-4094 host={{ inventory_hostname }} state=absent
'''
RETURN = '''
proposed:
description: k/v pairs of parameters passed into module
returned: always
type: dict
sample: {"access_vlan": "10", "interface": "eth1/5", "mode": "access"}
existing:
description: k/v pairs of existing switchport
type: dict
sample: {"access_vlan": "10", "access_vlan_name": "VLAN0010",
"interface": "Ethernet1/5", "mode": "access",
"native_vlan": "1", "native_vlan_name": "default",
"switchport": "Enabled", "trunk_vlans": "1-4094"}
end_state:
description: k/v pairs of switchport after module execution
returned: always
type: dict or null
sample: {"access_vlan": "10", "access_vlan_name": "VLAN0010",
"interface": "Ethernet1/5", "mode": "access",
"native_vlan": "1", "native_vlan_name": "default",
"switchport": "Enabled", "trunk_vlans": "1-4094"}
updates:
description: command string sent to the device
returned: always
type: list
sample: ["interface eth1/5", "switchport access vlan 20"]
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 re
from ansible.module_utils.basic import get_exception
from ansible.module_utils.netcfg import NetworkConfig, ConfigLine
from ansible.module_utils.shell import ShellError
try:
from ansible.module_utils.nxos import get_module
except ImportError:
from ansible.module_utils.nxos 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 get_interface_type(interface):
"""Gets the type of interface
Args:
interface (str): full name of interface, i.e. Ethernet1/1, loopback10,
port-channel20, vlan20
Returns:
type of interface: ethernet, svi, loopback, management, portchannel,
or unknown
"""
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, module):
"""Gets current mode of interface: layer2 or layer3
Args:
device (Device): This is the device object of an NX-API enabled device
using the Device class within device.py
interface (string): full name of interface, i.e. Ethernet1/1,
loopback10, port-channel20, vlan20
Returns:
str: 'layer2' or 'layer3'
"""
command = 'show interface ' + interface
intf_type = get_interface_type(interface)
body = execute_show_command(command, module)
mode = 'unknown'
interface_table = {}
try:
interface_table = body[0]['TABLE_interface']['ROW_interface']
except (KeyError, AttributeError, IndexError):
return mode
if interface_table:
# HACK FOR NOW
if intf_type in ['ethernet', 'portchannel']:
mode = str(interface_table.get('eth_mode', 'layer3'))
if mode in ['access', 'trunk']:
mode = 'layer2'
if mode == 'routed':
mode = 'layer3'
elif intf_type == 'loopback' or intf_type == 'svi':
mode = 'layer3'
return mode
def interface_is_portchannel(interface, module):
"""Checks to see if an interface is part of portchannel bundle
Args:
interface (str): full name of interface, i.e. Ethernet1/1
Returns:
True/False based on if interface is a member of a portchannel bundle
"""
intf_type = get_interface_type(interface)
if intf_type == 'ethernet':
command = 'show interface ' + interface
body = execute_show_command(command, module)
try:
interface_table = body[0]['TABLE_interface']['ROW_interface']
except (KeyError, AttributeError, IndexError):
interface_table = None
if interface_table:
state = interface_table.get('eth_bundle')
if state:
return True
else:
return False
return False
def get_switchport(port, module):
"""Gets current config of L2 switchport
Args:
device (Device): This is the device object of an NX-API enabled device
using the Device class within device.py
port (str): full name of interface, i.e. Ethernet1/1
Returns:
dictionary with k/v pairs for L2 vlan config
"""
command = 'show interface {0} switchport'.format(port)
body = execute_show_command(command, module)
try:
body = execute_show_command(command, module)[0]
except IndexError:
body = []
if body:
key_map = {
"interface": "interface",
"oper_mode": "mode",
"switchport": "switchport",
"access_vlan": "access_vlan",
"access_vlan_name": "access_vlan_name",
"native_vlan": "native_vlan",
"native_vlan_name": "native_vlan_name",
"trunk_vlans": "trunk_vlans"
}
sp_table = body['TABLE_interface']['ROW_interface']
sp = apply_key_map(key_map, sp_table)
return sp
else:
return {}
def remove_switchport_config_commands(interface, existing, proposed, module):
mode = proposed.get('mode')
commands = []
command = None
if mode == 'access':
av_check = existing.get('access_vlan') == proposed.get('access_vlan')
if av_check:
command = 'no switchport access vlan {0}'.format(
existing.get('access_vlan'))
commands.append(command)
elif mode == 'trunk':
tv_check = existing.get('trunk_vlans_list') == proposed.get('trunk_vlans_list')
if not tv_check:
existing_vlans = existing.get('trunk_vlans_list')
proposed_vlans = proposed.get('trunk_vlans_list')
vlans_to_remove = set(proposed_vlans).intersection(existing_vlans)
if vlans_to_remove:
command = 'switchport trunk allowed vlan remove {0}'.format(
proposed.get('trunk_vlans', proposed.get('trunk_allowed_vlans')))
commands.append(command)
native_check = existing.get(
'native_vlan') == proposed.get('native_vlan')
if native_check and proposed.get('native_vlan'):
command = 'no switchport trunk native vlan {0}'.format(
existing.get('native_vlan'))
commands.append(command)
if commands:
commands.insert(0, 'interface ' + interface)
return commands
def get_switchport_config_commands(interface, existing, proposed, module):
"""Gets commands required to config a given switchport interface
"""
proposed_mode = proposed.get('mode')
existing_mode = existing.get('mode')
commands = []
command = None
if proposed_mode != existing_mode:
if proposed_mode == 'trunk':
command = 'switchport mode trunk'
elif proposed_mode == 'access':
command = 'switchport mode access'
if command:
commands.append(command)
if proposed_mode == 'access':
av_check = existing.get('access_vlan') == proposed.get('access_vlan')
if not av_check:
command = 'switchport access vlan {0}'.format(
proposed.get('access_vlan'))
commands.append(command)
elif proposed_mode == 'trunk':
tv_check = existing.get('trunk_vlans_list') == proposed.get('trunk_vlans_list')
if not tv_check:
if proposed.get('allowed'):
command = 'switchport trunk allowed vlan {0}'.format(proposed.get('trunk_allowed_vlans'))
commands.append(command)
else:
existing_vlans = existing.get('trunk_vlans_list')
proposed_vlans = proposed.get('trunk_vlans_list')
vlans_to_add = set(proposed_vlans).difference(existing_vlans)
if vlans_to_add:
command = 'switchport trunk allowed vlan add {0}'.format(proposed.get('trunk_vlans'))
commands.append(command)
native_check = existing.get(
'native_vlan') == proposed.get('native_vlan')
if not native_check and proposed.get('native_vlan'):
command = 'switchport trunk native vlan {0}'.format(
proposed.get('native_vlan'))
commands.append(command)
if commands:
commands.insert(0, 'interface ' + interface)
return commands
def is_switchport_default(existing):
"""Determines if switchport has a default config based on mode
Args:
existing (dict): existing switcport configuration from Ansible mod
Returns:
boolean: True if switchport has OOB Layer 2 config, i.e.
vlan 1 and trunk all and mode is access
"""
c1 = existing['access_vlan'] == '1'
c2 = existing['native_vlan'] == '1'
c3 = existing['trunk_vlans'] == '1-4094'
c4 = existing['mode'] == 'access'
default = c1 and c2 and c3 and c4
return default
def default_switchport_config(interface):
commands = []
commands.append('interface ' + interface)
commands.append('switchport mode access')
commands.append('switch access vlan 1')
commands.append('switchport trunk native vlan 1')
commands.append('switchport trunk allowed vlan all')
return commands
def vlan_range_to_list(vlans):
result = []
if vlans:
for part in vlans.split(','):
if part == 'none':
break
if '-' in part:
a, b = part.split('-')
a, b = int(a), int(b)
result.extend(range(a, b + 1))
else:
a = int(part)
result.append(a)
return numerical_sort(result)
return result
def get_list_of_vlans(module):
command = 'show vlan'
body = execute_show_command(command, module)
vlan_list = []
vlan_table = body[0].get('TABLE_vlanbrief')['ROW_vlanbrief']
if isinstance(vlan_table, list):
for vlan in vlan_table:
vlan_list.append(str(vlan['vlanshowbr-vlanid-utf']))
else:
vlan_list.append('1')
return vlan_list
def numerical_sort(string_int_list):
"""Sorts list of strings/integers that are digits in numerical order.
"""
as_int_list = []
as_str_list = []
for vlan in string_int_list:
as_int_list.append(int(vlan))
as_int_list.sort()
for vlan in as_int_list:
as_str_list.append(str(vlan))
return as_str_list
def apply_key_map(key_map, table):
new_dict = {}
for key, value in table.items():
new_key = key_map.get(key)
if new_key:
new_dict[new_key] = str(value)
return new_dict
def apply_value_map(value_map, resource):
for key, value in value_map.items():
resource[key] = value[resource.get(key)]
return resource
def execute_config_command(commands, module):
try:
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')
module.cli.run_commands()
except ShellError:
clie = get_exception()
module.fail_json(msg='Error sending CLI commands',
error=str(clie), commands=commands)
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] or response[0] == '\n':
body = []
elif 'status' in command:
body = response
else:
try:
if isinstance(response[0], str):
body = [json.loads(response[0])]
else:
body = 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)
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':
if 'status' not in command:
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 flatten_list(command_lists):
flat_command_list = []
for command in command_lists:
if isinstance(command, list):
flat_command_list.extend(command)
else:
flat_command_list.append(command)
return flat_command_list
def main():
argument_spec = dict(
interface=dict(required=True, type='str'),
mode=dict(choices=['access', 'trunk'], required=False),
access_vlan=dict(type='str', required=False),
native_vlan=dict(type='str', required=False),
trunk_vlans=dict(type='str', aliases=['trunk_add_vlans'], required=False),
trunk_allowed_vlans=dict(type='str', required=False),
state=dict(choices=['absent', 'present', 'unconfigured'],
default='present')
)
module = get_network_module(argument_spec=argument_spec,
mutually_exclusive=[['access_vlan', 'trunk_vlans'],
['access_vlan', 'native_vlan'],
['access_vlan', 'trunk_allowed_vlans']],
supports_check_mode=True)
interface = module.params['interface']
mode = module.params['mode']
access_vlan = module.params['access_vlan']
state = module.params['state']
trunk_vlans = module.params['trunk_vlans']
native_vlan = module.params['native_vlan']
trunk_allowed_vlans = module.params['trunk_allowed_vlans']
args = dict(interface=interface, mode=mode, access_vlan=access_vlan,
native_vlan=native_vlan, trunk_vlans=trunk_vlans,
trunk_allowed_vlans=trunk_allowed_vlans)
proposed = dict((k, v) for k, v in args.iteritems() if v is not None)
interface = interface.lower()
if mode == 'access' and state == 'present' and not access_vlan:
module.fail_json(msg='access_vlan param is required when '
'mode=access && state=present')
if mode == 'trunk' and access_vlan:
module.fail_json(msg='access_vlan param not supported when '
'using mode=trunk')
current_mode = get_interface_mode(interface, module)
# Current mode will return layer3, layer2, or unknown
if current_mode == 'unknown' or current_mode == 'layer3':
module.fail_json(msg='Ensure interface is configured to be a L2'
'\nport first before using this module. You can use'
'\nthe nxos_interface module for this.')
if interface_is_portchannel(interface, module):
module.fail_json(msg='Cannot change L2 config on physical '
'\nport because it is in a portchannel. '
'\nYou should update the portchannel config.')
# existing will never be null for Eth intfs as there is always a default
existing = get_switchport(interface, module)
# Safeguard check
# If there isn't an existing, something is wrong per previous comment
if not existing:
module.fail_json(msg='Make sure you are using the FULL interface name')
current_vlans = get_list_of_vlans(module)
if state == 'present':
if access_vlan and access_vlan not in current_vlans:
module.fail_json(msg='You are trying to configure a VLAN'
' on an interface that\ndoes not exist on the '
' switch yet!', vlan=access_vlan)
elif native_vlan and native_vlan not in current_vlans:
module.fail_json(msg='You are trying to configure a VLAN'
' on an interface that\ndoes not exist on the '
' switch yet!', vlan=native_vlan)
if trunk_vlans or trunk_allowed_vlans:
if trunk_vlans:
trunk_vlans_list = vlan_range_to_list(trunk_vlans)
elif trunk_allowed_vlans:
trunk_vlans_list = vlan_range_to_list(trunk_allowed_vlans)
proposed['allowed'] = True
existing_trunks_list = vlan_range_to_list(
(existing['trunk_vlans'])
)
existing['trunk_vlans_list'] = existing_trunks_list
proposed['trunk_vlans_list'] = trunk_vlans_list
changed = False
commands = []
if state == 'present':
command = get_switchport_config_commands(interface, existing, proposed, module)
commands.append(command)
elif state == 'unconfigured':
is_default = is_switchport_default(existing)
if not is_default:
command = default_switchport_config(interface)
commands.append(command)
elif state == 'absent':
command = remove_switchport_config_commands(interface, existing,
proposed, module)
commands.append(command)
if trunk_vlans or trunk_allowed_vlans:
existing.pop('trunk_vlans_list')
proposed.pop('trunk_vlans_list')
end_state = existing
cmds = flatten_list(commands)
if cmds:
if module.check_mode:
module.exit_json(changed=True, commands=cmds)
else:
changed = True
execute_config_command(cmds, module)
end_state = get_switchport(interface, module)
results = {}
results['proposed'] = proposed
results['existing'] = existing
results['end_state'] = end_state
results['updates'] = cmds
results['changed'] = changed
module.exit_json(**results)
if __name__ == '__main__':
main()
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