ansible/network/ios/ios_config.py

364 lines
12 KiB
Python
Raw Normal View History

#!/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: ios_config
version_added: "2.1"
author: "Peter Sprygada (@privateip)"
short_description: Manage Cisco IOS configuration sections
description:
- Cisco IOS configurations use a simple block indent file syntax
for segmenting configuration into sections. This module provides
an implementation for working with IOS configuration sections in
a deterministic way.
extends_documentation_fragment: ios
options:
lines:
description:
- The ordered set of commands that should be configured in the
section. The commands must be the exact same commands as found
in the device running-config. Be sure to note the configuration
command syntax as some commands are automatically modified by the
device config parser.
required: false
default: null
aliases: ['commands']
parents:
description:
- The ordered set of parents that uniquely identify the section
the commands should be checked against. If the parents argument
is omitted, the commands are checked against the set of top
level or global commands.
required: false
default: null
src:
description:
- Specifies the source path to the file that contains the configuration
or configuration template to load. The path to the source file can
either be the full path on the Ansible control host or a relative
path from the playbook or role root directory. This argument is mutually
exclusive with I(lines).
required: false
default: null
version_added: "2.2"
before:
description:
- The ordered set of commands to push on to the command stack if
a change needs to be made. This allows the playbook designer
the opportunity to perform configuration commands prior to pushing
any changes without affecting how the set of commands are matched
against the system
required: false
default: null
after:
description:
- The ordered set of commands to append to the end of the command
stack if a change needs to be made. Just like with I(before) this
allows the playbook designer to append a set of commands to be
executed after the command set.
required: false
default: null
match:
description:
- Instructs the module on the way to perform the matching of
the set of commands against the current device config. If
match is set to I(line), commands are matched line by line. If
match is set to I(strict), command lines are matched with respect
to position. If match is set to I(exact), command lines
must be an equal match. Finally, if match is set to I(none), the
module will not attempt to compare the source configuration with
the running configuration on the remote device.
required: false
default: line
choices: ['line', 'strict', 'exact', 'none']
replace:
description:
- Instructs the module on the way to perform the configuration
on the device. If the replace argument is set to I(line) then
the modified lines are pushed to the device in configuration
mode. If the replace argument is set to I(block) then the entire
command block is pushed to the device in configuration mode if any
line is not correct
required: false
default: line
choices: ['line', 'block']
force:
description:
- The force argument instructs the module to not consider the
current devices running-config. When set to true, this will
cause the module to push the contents of I(src) into the device
without first checking if already configured.
- Note this argument should be considered deprecated. To achieve
the equivalient, set the match argument to none. This argument
will be removed in a future release.
required: false
default: false
choices: ["true", "false"]
version_added: "2.2"
commit:
description:
- This argument specifies the update method to use when applying the
configuration changes to the remote node. If the value is set to
I(merge) the configuration updates are merged with the running-
config. If the value is set to I(check), no changes are made to
the remote host.
required: false
default: merge
choices: ['merge', 'check']
version_added: "2.2"
backup:
description:
- This argument will cause the module to create a full backup of
the current C(running-config) from the remote device before any
changes are made. The backup file is written to the C(backup)
folder in the playbook root directory. If the directory does not
exist, it is created.
required: false
default: no
choices: ['yes', 'no']
version_added: "2.2"
config:
description:
- The C(config) argument allows the playbook desginer to supply
the base configuration to be used to validate configuration
changes necessary. If this argument is provided, the module
will not download the running-config from the remote node.
required: false
default: null
version_added: "2.2"
default:
description:
- This argument specifies whether or not to collect all defaults
when getting the remote device running config. When enabled,
the module will get the current config by issuing the command
C(show running-config all).
required: false
default: no
choices: ['yes', 'no']
version_added: "2.2"
save:
description:
- The C(save) argument instructs the module to save the running-
config to the startup-config at the conclusion of the module
running. If check mode is specified, this argument is ignored.
required: false
default: no
choices: ['yes', 'no']
version_added: "2.2"
"""
EXAMPLES = """
# Note: examples below use the following provider dict to handle
# transport and authentication to the node.
vars:
cli:
host: "{{ inventory_hostname }}"
username: cisco
password: cisco
transport: cli
- name: configure top level configuration
ios_config:
lines: hostname {{ inventory_hostname }}
provider: "{{ cli }}"
- name: configure interface settings
ios_config:
lines:
- description test interface
- ip address 172.31.1.1 255.255.255.0
parents: interface Ethernet1
provider: "{{ cli }}"
- name: load new acl into device
ios_config:
lines:
- 10 permit ip host 1.1.1.1 any log
- 20 permit ip host 2.2.2.2 any log
- 30 permit ip host 3.3.3.3 any log
- 40 permit ip host 4.4.4.4 any log
- 50 permit ip host 5.5.5.5 any log
parents: ip access-list extended test
before: no ip access-list extended test
match: exact
provider: "{{ cli }}"
"""
RETURN = """
updates:
description: The set of commands that will be pushed to the remote device
returned: always
type: when lines is defined
sample: ['...', '...']
backup_path:
description: The full path to the backup file
returned: when backup is yes
type: path
sample: /playbooks/ansible/backup/ios_config.2016-07-16@22:28:34
"""
import re
from ansible.module_utils.basic import get_exception
from ansible.module_utils.ios import NetworkModule, NetworkError
from ansible.module_utils.netcfg import NetworkConfig, dumps
from ansible.module_utils.netcli import Command
def check_args(module, warnings):
if module.params['force']:
warnings.append('The force argument is deprecated, please use '
'match=none instead. This argument will be '
'removed in the future')
def get_config(module, result):
contents = module.params['config']
if not contents:
defaults = module.params['default']
contents = module.config.get_config(include_defaults=defaults)
return NetworkConfig(indent=1, contents=contents)
def get_candidate(module):
candidate = NetworkConfig(indent=1)
if module.params['src']:
candidate.load(module.params['src'])
elif module.params['lines']:
parents = module.params['parents'] or list()
candidate.add(module.params['lines'], parents=parents)
return candidate
def load_backup(module):
try:
module.cli(['exit', 'config replace flash:/ansible-rollback force'])
except NetworkError:
module.fail_json(msg='unable to load backup configuration')
def backup_config(module):
cmd = 'copy running-config flash:/ansible-rollback'
cmd = Command(cmd, prompt=re.compile('\? $'), response='\n')
module.cli(cmd)
def run(module, result):
match = module.params['match']
replace = module.params['replace']
path = module.params['parents']
candidate = get_candidate(module)
if match != 'none':
config = get_config(module, result)
path = module.params['parents']
configobjs = candidate.difference(config, path=path,match=match,
replace=replace)
else:
configobjs = candidate.items
if configobjs:
commands = dumps(configobjs, 'commands').split('\n')
if module.params['lines']:
if module.params['before']:
commands[:0] = module.params['before']
if module.params['after']:
commands.extend(module.params['after'])
result['updates'] = commands
# create a backup copy of the current running-config on
# device flash drive
backup_config(module)
# send the configuration commands to the device and merge
# them with the current running config
if not module.check_mode:
module.config(commands)
result['changed'] = True
# remove the backup copy of the running-config since its
# no longer needed
module.cli('delete /force flash:/ansible-rollback')
if module.params['save']:
if not module.check_mode:
module.config.save_config()
result['changed'] = True
def main():
""" main entry point for module execution
"""
argument_spec = dict(
src=dict(type='path'),
lines=dict(aliases=['commands'], type='list'),
parents=dict(type='list'),
before=dict(type='list'),
after=dict(type='list'),
match=dict(default='line', choices=['line', 'strict', 'exact', 'none']),
replace=dict(default='line', choices=['line', 'block']),
# this argument is deprecated in favor of setting match: none
# it will be removed in a future version
force=dict(default=False, type='bool'),
config=dict(),
default=dict(type='bool', default=False),
save=dict(type='bool', default=False),
backup=dict(type='bool', default=False),
)
mutually_exclusive = [('lines', 'src')]
required_if = [('match', 'strict', ['lines']),
('match', 'exact', ['lines']),
('replace', 'block', ['lines'])]
module = NetworkModule(argument_spec=argument_spec,
connect_on_load=False,
mutually_exclusive=mutually_exclusive,
required_if=required_if,
supports_check_mode=True)
if module.params['force'] is True:
module.params['match'] = 'none'
warnings = list()
check_args(module, warnings)
result = dict(changed=False, warnings=warnings)
if module.params['backup']:
result['__backup__'] = module.config.get_config()
try:
run(module, result)
except NetworkError:
load_backup(module)
exc = get_exception()
module.fail_json(msg=str(exc))
module.exit_json(**result)
if __name__ == '__main__':
main()