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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/>.
#
ANSIBLE_METADATA = {'metadata_version': '1.1',
'status': ['preview'],
'supported_by': 'network'}
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
notes:
- Tested against EOS 4.15
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 = """
- name: run show version on remote devices
eos_command:
commands: show version
- name: run show version and check to see if output contains Arista
eos_command:
commands: show version
wait_for: result[0] contains Arista
- name: run multiple commands on remote nodes
eos_command:
commands:
- show version
- show interfaces
- 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
- name: run commands and specify the output format
eos_command:
commands:
- command: show version
output: json
"""
RETURN = """
stdout:
description: The set of responses from the commands
returned: always apart from low level errors (such as action plugin)
type: list
sample: ['...', '...']
stdout_lines:
description: The value of stdout split into a list
returned: always apart from low level errors (such as action plugin)
type: list
sample: [['...', '...'], ['...'], ['...']]
failed_conditions:
description: The list of conditionals that have failed
returned: failed
type: list
sample: ['...', '...']
"""
import time
from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils.pycompat24 import get_exception
from ansible.module_utils.six import string_types
from ansible.module_utils.network.common.parsing import Conditional
from ansible.module_utils.network.common.utils import ComplexList
from ansible.module_utils.network.eos.eos import run_commands
from ansible.module_utils.network.eos.eos import eos_argument_spec, check_args
VALID_KEYS = ['command', 'output', 'prompt', 'response']
def to_lines(stdout):
lines = list()
for item in stdout:
if isinstance(item, string_types):
item = str(item).split('\n')
lines.append(item)
return lines
def parse_commands(module, warnings):
spec = dict(
command=dict(key=True),
output=dict(),
prompt=dict(),
answer=dict()
)
transform = ComplexList(spec, module)
commands = transform(module.params['commands'])
if module.check_mode:
for item in list(commands):
if not item['command'].startswith('show'):
warnings.append(
'Only show commands are supported when using check_mode, not '
'executing %s' % item['command']
)
commands.remove(item)
return commands
def to_cli(obj):
cmd = obj['command']
if obj.get('output') == 'json':
cmd += ' | json'
return cmd
def main():
"""entry point for module execution
"""
argument_spec = dict(
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')
)
argument_spec.update(eos_argument_spec)
module = AnsibleModule(argument_spec=argument_spec,
supports_check_mode=True)
result = {'changed': False}
warnings = list()
check_args(module, warnings)
commands = parse_commands(module, warnings)
if warnings:
result['warnings'] = warnings
wait_for = module.params['wait_for'] or list()
try:
conditionals = [Conditional(c) for c in wait_for]
except AttributeError:
exc = get_exception()
module.fail_json(msg=str(exc))
retries = module.params['retries']
interval = module.params['interval']
match = module.params['match']
while retries > 0:
responses = run_commands(module, commands)
for item in list(conditionals):
if item(responses):
if match == 'any':
conditionals = list()
break
conditionals.remove(item)
if not conditionals:
break
time.sleep(interval)
retries -= 1
if conditionals:
failed_conditions = [item.raw for item in conditionals]
msg = 'One or more conditional statements have not be satisfied'
module.fail_json(msg=msg, failed_conditions=failed_conditions)
result.update({
'changed': False,
'stdout': responses,
'stdout_lines': to_lines(responses)
})
module.exit_json(**result)
if __name__ == '__main__':
main()
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