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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/>.
#
DOCUMENTATION = """
module: vyos_command
author: Nathaniel Case (@Qalthos)
short_description: Run one or more commands on VyOS devices
description:
- The command module allows running one or more commands on remote devices running
VyOS. This module can also be introspected to validate key parameters before returning
successfully. If the conditional statements are not met in the wait period, the
task fails.
- Certain C(show) commands in VyOS produce many lines of output and use a custom pager
that can cause this module to hang. If the value of the environment variable C(ANSIBLE_VYOS_TERMINAL_LENGTH)
is not set, the default number of 10000 is used.
version_added: 1.0.0
extends_documentation_fragment:
- vyos.vyos.vyos
options:
commands:
description:
- The ordered set of commands to execute on the remote device running VyOS. The
output from the command execution is returned to the playbook. If the I(wait_for)
argument is provided, the module is not returned until the condition is satisfied
or the number of 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
I(retries), the task fails. See examples.
aliases:
- waitfor
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 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 I(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
notes:
- Tested against VyOS 1.1.8 (helium).
- Running C(show system boot-messages all) will cause the module to hang since VyOS
is using a custom pager setting to display the output of that command.
- 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.
- This module works with connection C(network_cli). See L(the VyOS OS Platform Options,../network/user_guide/platform_vyos.html).
"""
EXAMPLES = """
- name: show configuration on ethernet devices eth0 and eth1
vyos.vyos.vyos_command:
commands:
- show interfaces ethernet {{ item }}
with_items:
- eth0
- eth1
- name: run multiple commands and check if version output contains specific version
string
vyos.vyos.vyos_command:
commands:
- show version
- show hardware cpu
wait_for:
- result[0] contains 'VyOS 1.1.7'
- name: run command that requires answering a prompt
vyos.vyos.vyos_command:
commands:
- command: rollback 1
prompt: Proceed with reboot? [confirm][y]
answer: y
"""
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
type: list
sample: [['...', '...'], ['...'], ['...']]
failed_conditions:
description: The list of conditionals that have failed
returned: failed
type: list
sample: ['...', '...']
warnings:
description: The list of warnings (if any) generated by module based on arguments
returned: always
type: list
sample: ['...', '...']
"""
import time
from ansible.module_utils._text import to_text
from ansible.module_utils.basic import AnsibleModule
from ansible_collections.ansible.netcommon.plugins.module_utils.network.common.parsing import (
Conditional,
)
from ansible_collections.ansible.netcommon.plugins.module_utils.network.common.utils import (
transform_commands,
to_lines,
)
from ansible_collections.vyos.vyos.plugins.module_utils.network.vyos.vyos import (
run_commands,
)
from ansible_collections.vyos.vyos.plugins.module_utils.network.vyos.vyos import (
vyos_argument_spec,
)
def parse_commands(module, warnings):
commands = transform_commands(module)
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():
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"),
)
spec.update(vyos_argument_spec)
module = AnsibleModule(argument_spec=spec, supports_check_mode=True)
warnings = list()
result = {"changed": False, "warnings": warnings}
commands = parse_commands(module, 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))
retries = module.params["retries"]
interval = module.params["interval"]
match = module.params["match"]
for item in range(retries):
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)
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": list(to_lines(responses))}
)
module.exit_json(**result)
if __name__ == "__main__":
main()
|
