#!/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 .
#
DOCUMENTATION = """
---
module: nxos_command
version_added: "2.1"
author: "Peter Sprygada (@privateip)"
short_description: Run arbitrary command on Cisco NXOS devices
description:
- Sends an arbitrary command to an NXOS node and returns the results
read from the device. This module includes an
argument that will cause the module to wait for a specific condition
before returning or timing out if the condition is not met.
extends_documentation_fragment: nxos
options:
commands:
description:
- The commands to send to the remote NXOS device over the
configured provider. The resulting output from the command
is returned. If the I(wait_for) argument is provided, the
module is not returned until the condition is satisfied or
the number of retires as expired.
- The I(commands) argument also accepts an alternative form
that allows for complex values that specify the command
to run and the output format to return. This can be done
on a command by command basis. The complex argument supports
the keywords C(command) and C(output) where C(command) is the
command to run and C(output) is one of 'text' or 'json'.
required: true
wait_for:
description:
- Specifies what to evaluate from the output of the command
and what conditionals to apply. This argument will cause
the task to wait for a particular conditional to be true
before moving forward. If the conditional is not true
by the configured retries, the task fails. See examples.
required: false
default: null
aliases: ['waitfor']
version_added: "2.2"
match:
description:
- The I(match) argument is used in conjunction with the
I(wait_for) argument to specify the match policy. Valid
values are C(all) or C(any). If the value is set to C(all)
then all conditionals in the I(wait_for) must be satisfied. If
the value is set to C(any) then only one of the values must be
satisfied.
required: false
default: all
version_added: "2.2"
retries:
description:
- Specifies the number of retries a command should by tried
before it is considered failed. The command is run on the
target device every retry and evaluated against the I(wait_for)
conditionals.
required: false
default: 10
interval:
description:
- Configures the interval in seconds to wait between retries
of the command. If the command does not pass the specified
conditional, the interval indicates how to long to wait before
trying the command again.
required: false
default: 1
"""
EXAMPLES = """
# Note: examples below use the following provider dict to handle
# transport and authentication to the node.
vars:
cli:
host: "{{ inventory_hostname }}"
username: admin
password: admin
transport: cli
- name: run show verion on remote devices
nxos_command:
commands: show version
provider: "{{ cli }}"
- name: run show version and check to see if output contains Cisco
nxos_command:
commands: show version
wait_for: result[0] contains Cisco
provider: "{{ cli }}"
- name: run multiple commands on remote nodes
nxos_command:
commands:
- show version
- show interfaces
provider: "{{ cli }}"
- name: run multiple commands and evalute the output
nxos_command:
commands:
- show version
- show interfaces
wait_for:
- result[0] contains Cisco
- result[1] contains loopback0
provider: "{{ cli }}"
- name: run commands and specify the output format
nxos_command:
commands:
- command: show version
output: json
provider: "{{ cli }}"
"""
RETURN = """
stdout:
description: the set of responses from the commands
returned: always
type: list
sample: ['...', '...']
stdout_lines:
description: The value of stdout split into a list
returned: always
type: list
sample: [['...', '...'], ['...'], ['...']]
failed_conditions:
description: the conditionals that failed
retured: failed
type: list
sample: ['...', '...']
"""
import ansible.module_utils.nxos
from ansible.module_utils.basic import get_exception
from ansible.module_utils.network import NetworkModule, NetworkError
from ansible.module_utils.netcli import CommandRunner
from ansible.module_utils.netcli import FailedConditionsError
from ansible.module_utils.netcli import FailedConditionalError
from ansible.module_utils.netcli import AddCommandError
VALID_KEYS = ['command', 'output', 'prompt', 'response']
def to_lines(stdout):
for item in stdout:
if isinstance(item, basestring):
item = str(item).split('\n')
yield item
def parse_commands(module):
for cmd in module.params['commands']:
if isinstance(cmd, basestring):
cmd = dict(command=cmd, output=None)
elif 'command' not in cmd:
module.fail_json(msg='command keyword argument is required')
elif cmd.get('output') not in [None, 'text', 'json']:
module.fail_json(msg='invalid output specified for command')
elif not set(cmd.keys()).issubset(VALID_KEYS):
module.fail_json(msg='unknown keyword specified')
yield cmd
def main():
spec = dict(
# { command: , output: , prompt: , response: }
commands=dict(type='list', required=True),
wait_for=dict(type='list', aliases=['waitfor']),
match=dict(default='all', choices=['any', 'all']),
retries=dict(default=10, type='int'),
interval=dict(default=1, type='int')
)
module = NetworkModule(argument_spec=spec,
supports_check_mode=True)
commands = list(parse_commands(module))
conditionals = module.params['wait_for'] or list()
warnings = list()
runner = CommandRunner(module)
for cmd in commands:
if module.check_mode and not cmd['command'].startswith('show'):
warnings.append('only show commands are supported when using '
'check mode, not executing `%s`' % cmd['command'])
else:
if cmd['command'].startswith('conf'):
module.fail_json(msg='nxos_command does not support running '
'config mode commands. Please use '
'nxos_config instead')
try:
runner.add_command(**cmd)
except AddCommandError:
exc = get_exception()
warnings.append('duplicate command detected: %s' % cmd)
for item in conditionals:
runner.add_conditional(item)
runner.retries = module.params['retries']
runner.interval = module.params['interval']
runner.match = module.params['match']
try:
runner.run()
except FailedConditionsError:
exc = get_exception()
module.fail_json(msg=str(exc), failed_conditions=exc.failed_conditions)
except FailedConditionalError:
exc = get_exception()
module.fail_json(msg=str(exc), failed_conditional=exc.failed_conditional)
except NetworkError:
exc = get_exception()
module.fail_json(msg=str(exc), **exc.kwargs)
result = dict(changed=False)
result['stdout'] = list()
for cmd in commands:
try:
output = runner.get_command(cmd['command'], cmd.get('output'))
except ValueError:
output = 'command not executed due to check_mode, see warnings'
result['stdout'].append(output)
result['warnings'] = warnings
result['stdout_lines'] = list(to_lines(result['stdout']))
module.exit_json(**result)
if __name__ == '__main__':
main()