arista.eos.eos_command module – Run arbitrary commands on an Arista EOS device

Note

This module is part of the arista.eos collection (version 5.0.1).

You might already have this collection installed if you are using the ansible package. It is not included in ansible-core. To check whether it is installed, run ansible-galaxy collection list.

To install it, use: ansible-galaxy collection install arista.eos.

To use it in a playbook, specify: arista.eos.eos_command.

New in version 1.0.0: of arista.eos

Synopsis

  • 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.

Parameters

Parameter

Comments

commands

list / elements=raw / required

The commands to send to the remote EOS device over the configured provider. The resulting output from the command is returned. If the wait_for argument is provided, the module is not returned until the condition is satisfied or the number of retries has been exceeded.

Commands may be represented either as simple strings or as dictionaries as described below. Refer to the Examples setion for some common uses.

answer

list / elements=string

The answer to reply with if prompt is matched. The value can be a single answer or a list of answer for multiple prompts. In case the command execution results in multiple prompts the sequence of the prompt and excepted answer should be in same order.

check_all

boolean

By default if any one of the prompts mentioned in prompt option is matched it won’t check for other prompts. This boolean flag, that when set to True will check for all the prompts mentioned in prompt option in the given order. If the option is set to True all the prompts should be received from remote host if not it will result in timeout.

Choices:

  • no ← (default)

  • yes

command

string / required

The command to send to the remote network device. The resulting output from the command is returned, unless sendonly is set.

newline

boolean

The boolean value, that when set to false will send answer to the device without a trailing newline.

Choices:

  • no

  • yes ← (default)

output

string

How the remote device should format the command response data.

Choices:

  • text

  • json

prompt

list / elements=string

A single regex pattern or a sequence of patterns to evaluate the expected prompt from command.

sendonly

boolean

The boolean value, that when set to true will send command to the device but not wait for a result.

Choices:

  • no ← (default)

  • yes

version

string

Specifies the version of the JSON response returned when output=json.

Choices:

  • 1

  • latest ← (default)

interval

integer

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

match

string

The match argument is used in conjunction with the wait_for argument to specify the match policy. Valid values are all or any. If the value is set to all then all conditionals in the wait_for must be satisfied. If the value is set to any then only one of the values must be satisfied.

Choices:

  • any

  • all ← (default)

provider

dictionary

Deprecated

Starting with Ansible 2.5 we recommend using connection: network_cli.

Starting with Ansible 2.6 we recommend using connection: httpapi for eAPI.

This option will be removed in a release after 2022-06-01.

For more information please see the EOS Platform Options guide.


A dict object containing connection details.

auth_pass

string

Specifies the password to use if required to enter privileged mode on the remote device. If authorize is false, then this argument does nothing. If the value is not specified in the task, the value of environment variable ANSIBLE_NET_AUTH_PASS will be used instead.

authorize

boolean

Instructs the module to enter privileged mode on the remote device before sending any commands. If not specified, the device will attempt to execute all commands in non-privileged mode. If the value is not specified in the task, the value of environment variable ANSIBLE_NET_AUTHORIZE will be used instead.

Choices:

  • no ← (default)

  • yes

host

string

Specifies the DNS host name or address for connecting to the remote device over the specified transport. The value of host is used as the destination address for the transport.

password

string

Specifies the password to use to authenticate the connection to the remote device. This is a common argument used for either cli or eapi transports. If the value is not specified in the task, the value of environment variable ANSIBLE_NET_PASSWORD will be used instead.

port

integer

Specifies the port to use when building the connection to the remote device. This value applies to either cli or eapi.

The port value will default to the appropriate transport common port if none is provided in the task (cli=22, http=80, https=443).

Default: 0

ssh_keyfile

path

Specifies the SSH keyfile to use to authenticate the connection to the remote device. This argument is only used for cli transports. If the value is not specified in the task, the value of environment variable ANSIBLE_NET_SSH_KEYFILE will be used instead.

timeout

integer

Specifies the timeout in seconds for communicating with the network device for either connecting or sending commands. If the timeout is exceeded before the operation is completed, the module will error.

transport

string

Configures the transport connection to use when connecting to the remote device.

Choices:

  • cli ← (default)

  • eapi

use_proxy

boolean

If no, the environment variables http_proxy and https_proxy will be ignored.

Choices:

  • no

  • yes ← (default)

use_ssl

boolean

Configures the transport to use SSL if set to yes only when the transport=eapi. If the transport argument is not eapi, this value is ignored.

Choices:

  • no

  • yes ← (default)

username

string

Configures the username to use to authenticate the connection to the remote device. This value is used to authenticate either the CLI login or the eAPI authentication depending on which transport is used. If the value is not specified in the task, the value of environment variable ANSIBLE_NET_USERNAME will be used instead.

validate_certs

boolean

If no, SSL certificates will not be validated. This should only be used on personally controlled sites using self-signed certificates. If the transport argument is not eapi, this value is ignored.

Choices:

  • no

  • yes ← (default)

retries

integer

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 wait_for conditionals.

Default: 10

wait_for

aliases: waitfor

list / elements=string

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 wait_for the value in result['stdout'] can be accessed using result, that is to access result['stdout'][0] use result[0] See examples.

Notes

Note

Examples

- name: run show version on remote devices
  arista.eos.eos_command:
    commands: show version

- name: run show version and check to see if output contains Arista
  arista.eos.eos_command:
    commands: show version
    wait_for: result[0] contains Arista

- name: run multiple commands on remote nodes
  arista.eos.eos_command:
    commands:
    - show version
    - show interfaces

- name: run multiple commands and evaluate the output
  arista.eos.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
  arista.eos.eos_command:
    commands:
    - command: show version
      output: json

- name: check whether the switch is in maintenance mode
  arista.eos.eos_command:
    commands: show maintenance
    wait_for: result[0] contains 'Under Maintenance'

- name: check whether the switch is in maintenance mode using json output
  arista.eos.eos_command:
    commands:
    - command: show maintenance
      output: json
    wait_for: result[0].units.System.state eq 'underMaintenance'

- name: check whether the switch is in maintenance, with 8 retries
    and 2 second interval between retries
  arista.eos.eos_command:
    commands: show maintenance
    wait_for: result[0]['units']['System']['state'] eq 'underMaintenance'
    interval: 2
    retries: 8

- name: run a command that requires a confirmation. Note that prompt
    takes regexes, and so strings containing characters like brackets
    need to be escaped.
  arista.eos.eos_command:
    commands:
    - command: reload power
      prompt: \[confirm\]
      answer: y
      newline: false

Return Values

Common return values are documented here, the following are the fields unique to this module:

Key

Description

failed_conditions

list / elements=string

The list of conditionals that have failed

Returned: failed

Sample: [”…”, “…”]

stdout

list / elements=string

The set of responses from the commands

Returned: always apart from low level errors (such as action plugin)

Sample: [”…”, “…”]

stdout_lines

list / elements=string

The value of stdout split into a list

Returned: always apart from low level errors (such as action plugin)

Sample: [[”…”, “…”], [”…”], [”…”]]

Authors

  • Peter Sprygada (@privateip)