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community.general/plugins/modules/network/exos/exos_command.py

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2020-03-09 10:11:07 +01:00
#!/usr/bin/python
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
from __future__ import absolute_import, division, print_function
__metaclass__ = type
ANSIBLE_METADATA = {'metadata_version': '1.1',
'status': ['preview'],
'supported_by': 'community'}
DOCUMENTATION = '''
---
module: exos_command
author: "Rafael D. Vencioneck (@rdvencioneck)"
short_description: Run commands on remote devices running Extreme EXOS
description:
- Sends arbitrary commands to an Extreme EXOS device 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.
- This module does not support running configuration commands.
Please use M(exos_config) to configure EXOS devices.
notes:
- If a command sent to the device requires answering a prompt, it is possible
to pass a dict containing I(command), I(answer) and I(prompt). See examples.
options:
commands:
description:
- List of commands to send to the remote EXOS 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 retries has expired.
required: true
wait_for:
description:
- List of conditions to evaluate against the output of the
command. The task will wait for each condition to be true
before moving forward. If the conditional is not true
within the configured number of retries, the task fails.
See examples.
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 wait_for must be satisfied. If
the value is set to C(any) then only one of the values must be
satisfied.
default: all
choices: ['any', 'all']
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) conditions.
default: 10
interval:
description:
- Configures the interval in seconds to wait between retries
of the command. If the command does not pass the specified
conditions, the interval indicates how long to wait before
trying the command again.
default: 1
'''
EXAMPLES = """
tasks:
- name: run show version on remote devices
exos_command:
commands: show version
- name: run show version and check to see if output contains ExtremeXOS
exos_command:
commands: show version
wait_for: result[0] contains ExtremeXOS
- name: run multiple commands on remote nodes
exos_command:
commands:
- show version
- show ports no-refresh
- name: run multiple commands and evaluate the output
exos_command:
commands:
- show version
- show ports no-refresh
wait_for:
- result[0] contains ExtremeXOS
- result[1] contains 20
- name: run command that requires answering a prompt
exos_command:
commands:
- command: 'clear license-info'
prompt: 'Are you sure.*'
answer: 'Yes'
"""
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 re
import time
from ansible_collections.community.general.plugins.module_utils.network.exos.exos import run_commands
from ansible.module_utils.basic import AnsibleModule
from ansible_collections.ansible.netcommon.plugins.module_utils.network.common.utils import ComplexList
from ansible_collections.ansible.netcommon.plugins.module_utils.network.common.parsing import Conditional
from ansible.module_utils.six import string_types
def to_lines(stdout):
for item in stdout:
if isinstance(item, string_types):
item = str(item).split('\n')
yield item
def parse_commands(module, warnings):
command = ComplexList(dict(
command=dict(key=True),
prompt=dict(),
answer=dict()
), module)
commands = command(module.params['commands'])
for item in list(commands):
command_split = re.match(r'^(\w*)(.*)$', item['command'])
if module.check_mode and not item['command'].startswith('show'):
warnings.append(
'only show commands are supported when using check mode, not '
'executing `%s`' % item['command']
)
commands.remove(item)
elif command_split and command_split.group(1) not in ('check', 'clear', 'debug', 'history',
'ls', 'mrinfo', 'mtrace', 'nslookup',
'ping', 'rtlookup', 'show', 'traceroute'):
module.fail_json(
msg='some commands were not recognized. exos_command can only run read-only'
'commands. For configuration commands, please use exos_config instead'
)
return commands
def main():
"""main entry point for module execution
"""
argument_spec = dict(
commands=dict(type='list', required=True),
wait_for=dict(type='list'),
match=dict(default='all', choices=['all', 'any']),
retries=dict(default=10, type='int'),
interval=dict(default=1, type='int')
)
module = AnsibleModule(argument_spec=argument_spec,
supports_check_mode=True)
result = {'changed': False}
warnings = list()
commands = parse_commands(module, warnings)
result['warnings'] = warnings
wait_for = module.params['wait_for'] or list()
conditionals = [Conditional(c) for c in wait_for]
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': list(to_lines(responses))
})
module.exit_json(**result)
if __name__ == '__main__':
main()