#!/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 .
#
ANSIBLE_METADATA = {'status': ['preview'],
'supported_by': 'core',
'version': '1.0'}
DOCUMENTATION = """
---
module: eos_command
version_added: "2.1"
author: "Peter Sprygada (@privateip)"
short_description: Run arbitrary commands on an Arista EOS device
description:
- Sends an arbitrary set of commands to an EOS 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: eos
options:
commands:
description:
- The commands to send to the remote EOS 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 I(retries) has been exceeded.
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
choices: ['any', 'all']
version_added: "2.2"
retries:
description:
- Specifies the number of retries a command should be 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 version on remote devices
eos_command:
commands: show version
provider: "{{ cli }}"
- name: run show version and check to see if output contains Arista
eos_command:
commands: show version
wait_for: result[0] contains Arista
provider: "{{ cli }}"
- name: run multiple commands on remote nodes
eos_command:
commands:
- show version
- show interfaces
provider: "{{ cli }}"
- name: run multiple commands and evaluate the output
eos_command:
commands:
- show version
- show interfaces
wait_for:
- result[0] contains Arista
- result[1] contains Loopback0
provider: "{{ cli }}"
- name: run commands and specify the output format
eos_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
returned: failed
type: list
sample: ['...', '...']
"""
import ansible.module_utils.eos
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 AddCommandError, AddConditionError
from ansible.module_utils.netcli import FailedConditionsError
from ansible.module_utils.netcli import FailedConditionalError
from ansible.module_utils.six import string_types
VALID_KEYS = ['command', 'output', 'prompt', 'response']
def to_lines(stdout):
for item in stdout:
if isinstance(item, string_types):
item = str(item).split('\n')
yield item
def parse_commands(module):
for cmd in module.params['commands']:
if isinstance(cmd, string_types):
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 command keyword specified. Valid '
'values are %s' % ', '.join(VALID_KEYS))
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=['all', 'any']),
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='eos_command does not support running '
'config mode commands. Please use '
'eos_config instead')
try:
runner.add_command(**cmd)
except AddCommandError:
exc = get_exception()
warnings.append('duplicate command detected: %s' % cmd)
try:
for item in conditionals:
runner.add_conditional(item)
except AddConditionError:
exc = get_exception()
module.fail_json(msg=str(exc), condition=exc.condition)
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, 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()