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Remove unnecessary features from cli_command (#43829)

* Remove wait_for & associated params

* Upgrade command dict to top-level, remove more wait_for accessories

* We don't need all this anymore

* Update docs

* Update tests to new argspec

* Be a little more explicit about sendonly

Also remove reference to the word provider.

* Add example of prompt and answer
This commit is contained in:
Nathaniel Case 2018-08-09 12:46:38 -04:00 committed by GitHub
parent 32eab149b6
commit 0f554f9208
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GPG key ID: 4AEE18F83AFDEB23
13 changed files with 205 additions and 298 deletions

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@ -16,212 +16,113 @@ DOCUMENTATION = """
module: cli_command
version_added: "2.7"
author: "Nathaniel Case (@qalthos)"
short_description: Run arbitrary commands on cli-based network devices
short_description: Run a cli command on cli-based network devices
description:
- Sends an arbitrary set of commands to a network 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.
notes:
- Tested against EOS 4.15
- Sends a command to a network device and returns the result read from the device.
options:
commands:
command:
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.
- The command to send to the remote network device. The resulting output
from the command is returned, unless I(sendonly) is set.
required: true
wait_for:
prompt:
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.
Note - With I(wait_for) the value in C(result['stdout']) can be accessed
using C(result), that is to access C(result['stdout'][0]) use C(result[0]) See examples.
aliases: ['waitfor']
version_added: "2.2"
match:
- A single regex pattern or a sequence of patterns to evaluate the expected
prompt from I(command).
required: false
answer:
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.
default: all
choices: ['any', 'all']
version_added: "2.2"
retries:
- The answer to reply with if I(prompt) is matched.
required: false
sendonly:
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.
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.
default: 1
- The boolean value, that when set to true will send I(command) to the
device but not wait for a result.
type: bool
default: false
required: false
"""
EXAMPLES = """
- name: run show version on remote devices
cli_command:
commands: show version
command: show version
- name: run show version and check to see if output contains Arista
- name: run command with json formatted output
cli_command:
commands: show version
wait_for: result[0] contains Arista
command: show version | json
- name: run multiple commands on remote nodes
- name: run command expecting user confirmation
cli_command:
commands:
- show version
- show interfaces
- name: run multiple commands and evaluate the output
cli_command:
commands:
- show version
- show interfaces
wait_for:
- result[0] contains Arista
- result[1] contains Loopback0
- name: run commands and specify the output format
cli_command:
commands:
- command: show version
output: json
command: commit replace
prompt: This commit will replace or remove the entire running configuration
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: ['...', '...']
description: The response from the command
returned: when sendonly is false
type: string
sample: 'Version: VyOS 1.1.7[...]'
json:
description: A dictionary representing a JSON-formatted response
returned: when the device response is valid JSON
type: dict
sample: |
{
"architecture": "i386",
"bootupTimestamp": 1532649700.56,
"modelName": "vEOS",
"version": "4.15.9M"
[...]
}
"""
import time
from ansible.module_utils._text import to_text
from ansible.module_utils.six import string_types
from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils.connection import Connection, ConnectionError
from ansible.module_utils.network.common.parsing import Conditional
from ansible.module_utils.network.common.utils import ComplexList
VALID_KEYS = ['command', 'output', 'prompt', 'response']
def to_lines(output):
lines = []
for item in output:
if isinstance(item, string_types):
item = to_text(item).split('\n')
lines.append(item)
return lines
def parse_commands(module, warnings):
transform = ComplexList(dict(
command=dict(key=True),
output=dict(),
prompt=dict(),
answer=dict()
), 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 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')
command=dict(type='str', required=True),
prompt=dict(type='list', required=False),
answer=dict(type='str', required=False),
sendonly=dict(type='bool', default=False, required=False),
)
module = AnsibleModule(argument_spec=argument_spec,
required_together = [['prompt', 'response']]
module = AnsibleModule(argument_spec=argument_spec, required_together=required_together,
supports_check_mode=True)
if module.check_mode and not module.params['command'].startswith('show'):
module.fail_json(
msg='Only show commands are supported when using check_mode, not '
'executing %s' % module.params['command']
)
warnings = list()
result = {'changed': False, 'warnings': warnings}
wait_for = module.params['wait_for'] or list()
try:
conditionals = [Conditional(c) for c in wait_for]
except AttributeError as exc:
module.fail_json(msg=to_text(exc))
commands = parse_commands(module, warnings)
retries = module.params['retries']
interval = module.params['interval']
match = module.params['match']
connection = Connection(module._socket_path)
for attempt in range(retries):
responses = []
response = ''
try:
response = connection.get(**module.params)
except ConnectionError as exc:
module.fail_json(msg=to_text(exc, errors='surrogate_then_replace'))
if not module.params['sendonly']:
try:
for command in commands:
responses.append(connection.get(**command))
except ConnectionError as exc:
module.fail_json(msg=to_text(exc, errors='surrogate_then_replace'))
result['json'] = module.from_json(response)
except ValueError:
pass
for item in list(conditionals):
if item(responses):
if match == 'any':
conditionals = list()
break
conditionals.remove(item)
if not conditionals:
break
time.sleep(interval)
if conditionals:
failed_conditions = [item.raw for item in conditionals]
msg = 'One or more conditional statements have not been satisfied'
module.fail_json(msg=msg, failed_conditions=failed_conditions)
result.update({
'stdout': responses,
'stdout_lines': to_lines(responses)
})
result.update({
'stdout': response,
})
module.exit_json(**result)

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@ -2,10 +2,41 @@
- debug:
msg: "START cli/cli_command.yaml on connection={{ ansible_connection }}"
- name: get output for single command
cli_command:
command: show version
register: result
- assert:
that:
- "result.changed == false"
- "result.stdout is defined"
- name: send invalid command
cli_command:
command: 'show foo'
register: result
ignore_errors: yes
- assert:
that:
- "result.failed == true"
- "result.msg is defined"
- name: get output in JSON format
cli_command:
command: show version | json
register: result
- assert:
that:
- "result.changed == false"
- "result.stdout is defined"
- "result.json is defined"
- name: command that does require become (should fail)
cli_command:
commands:
- show running-config
command: show running-config
become: no
ignore_errors: yes
register: result
@ -15,28 +46,4 @@
- 'result.failed == true'
- '"privileged mode required" in result.msg'
- name: get output for single command
cli_command:
commands:
- show version
register: result
- assert:
that:
- "result.changed == false"
- "result.stdout is defined"
- name: get output for multiple commands
cli_command:
commands:
- show version
- show interfaces
register: result
- assert:
that:
- "result.changed == false"
- "result.stdout is defined"
- "result.stdout | length == 2"
- debug: msg="END cli/cli_command.yaml on connection={{ ansible_connection }}"

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@ -4,8 +4,7 @@
- name: get output for single command
cli_command:
commands:
- show version
command: show version
register: result
- assert:
@ -13,17 +12,15 @@
- "result.changed == false"
- "result.stdout is defined"
- name: get output for multiple commands
- name: send invalid command
cli_command:
commands:
- show version
- show interfaces
command: 'show foo'
register: result
ignore_errors: yes
- assert:
that:
- "result.changed == false"
- "result.stdout is defined"
- "result.stdout | length == 2"
- "result.failed == true"
- "result.msg is defined"
- debug: msg="END cli/cli_command.yaml on connection={{ ansible_connection }}"

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@ -1,32 +0,0 @@
---
- debug:
msg: "START cli/cli_command.yaml on connection={{ ansible_connection }}"
- block:
- name: get output for single command
cli_command:
commands:
- show version
register: result
- assert:
that:
- "result.changed == false"
- "result.stdout is defined"
- name: get output for multiple commands
cli_command:
commands:
- show version
- show interfaces
register: result
- assert:
that:
- "result.changed == false"
- "result.stdout is defined"
- "result.stdout | length == 2"
when: ansible_connection == 'network_cli'
- debug: msg="END cli/cli_command.yaml on connection={{ ansible_connection }}"

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@ -0,0 +1,46 @@
---
- debug:
msg: "START cli/cli_command.yaml on connection={{ ansible_connection }}"
- name: get output for single command
cli_command:
command: show version
register: result
- assert:
that:
- "result.changed == false"
- "result.stdout is defined"
- name: send invalid command
cli_command:
command: 'show foo'
register: result
ignore_errors: yes
- assert:
that:
- "result.failed == true"
- "result.msg is defined"
- block:
- name: Run command with prompt
cli_command:
command: 'copy running-config harddisk:ansible_tmp.txt'
prompt: 'Destination file name \(control-c to abort\)\: \[\/ansible_tmp.txt\]\?'
answer: 'ansible_tmp.txt'
register: result
- assert:
that:
- "result.stdout is defined"
- "'ansible_tmp' in result.stdout[0]"
always:
- name: Remove copied file
cli_command:
command: 'delete harddisk:ansible_tmp.txt'
prompt: 'Delete harddisk\:ansible_tmp\.txt\[confirm\]'
answer: "\r\n"
ignore_errors: yes
- debug: msg="END cli/cli_command.yaml on connection={{ ansible_connection }}"

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@ -1,32 +0,0 @@
---
- debug:
msg: "START cli/cli_command.yaml on connection={{ ansible_connection }}"
- block:
- name: get output for single command
cli_command:
commands:
- show version
register: result
- assert:
that:
- "result.changed == false"
- "result.stdout is defined"
- name: get output for multiple commands
cli_command:
commands:
- show version
- show interfaces
register: result
- assert:
that:
- "result.changed == false"
- "result.stdout is defined"
- "result.stdout | length == 2"
when: ansible_connection == 'network_cli'
- debug: msg="END cli/cli_command.yaml on connection={{ ansible_connection }}"

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@ -2,3 +2,4 @@
- { include: netconf_xml.yaml, tags: ['netconf', 'xml'] }
- { include: netconf_text.yaml, tags: ['netconf', 'text'] }
- { include: netconf_json.yaml, tags: ['netconf', 'json'] }
- { include: cli.yaml, tags: ['cli'] }

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@ -1,3 +1,2 @@
---
- { include: netconf.yaml, tags: ['netconf'] }
- { include: cli.yaml, tags: ['cli'] }

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@ -0,0 +1,26 @@
---
- debug:
msg: "START cli/cli_command.yaml on connection={{ ansible_connection }}"
- name: get output for single command
cli_command:
command: show version
register: result
- assert:
that:
- "result.changed == false"
- "result.stdout is defined"
- name: send invalid command
cli_command:
command: 'show foo'
register: result
ignore_errors: yes
- assert:
that:
- "result.failed == true"
- "result.msg is defined"
- debug: msg="END cli/cli_command.yaml on connection={{ ansible_connection }}"

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@ -1,32 +0,0 @@
---
- debug:
msg: "START cli/cli_command.yaml on connection={{ ansible_connection }}"
- block:
- name: get output for single command
cli_command:
commands:
- show version
register: result
- assert:
that:
- "result.changed == false"
- "result.stdout is defined"
- name: get output for multiple commands
cli_command:
commands:
- show version
- show interface
register: result
- assert:
that:
- "result.changed == false"
- "result.stdout is defined"
- "result.stdout | length == 2"
when: ansible_connection == 'network_cli'
- debug: msg="END cli/cli_command.yaml on connection={{ ansible_connection }}"

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@ -0,0 +1,26 @@
---
- debug:
msg: "START cli/cli_command.yaml on connection={{ ansible_connection }}"
- name: get output for single command
cli_command:
command: show version
register: result
- assert:
that:
- "result.changed == false"
- "result.stdout is defined"
- name: send invalid command
cli_command:
command: 'show foo'
register: result
ignore_errors: yes
- assert:
that:
- "result.failed == true"
- "result.msg is defined"
- debug: msg="END cli/cli_command.yaml on connection={{ ansible_connection }}"