vyos_command – Run one or more commands on VyOS devices

New in version 2.2.

Synopsis

  • 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 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 ANSIBLE_VYOS_TERMINAL_LENGTH is not set, the default number of 10000 is used.

Parameters

Parameter Choices/Defaults Comments
commands
- / required
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 wait_for argument is provided, the module is not returned until the condition is satisfied or the number of retries has been exceeded.
interval
-
Default:
1
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.
match
-
    Choices:
  • any
  • all ←
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.
provider
-
Deprecated
Starting with Ansible 2.5 we recommend using connection: network_cli.
For more information please see the Network Guide.
A dict object containing connection details.
host
- / required
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
-
Specifies the password to use to authenticate the connection to the remote device. This value is used to authenticate the SSH session. If the value is not specified in the task, the value of environment variable ANSIBLE_NET_PASSWORD will be used instead.
port
-
Default:
22
Specifies the port to use when building the connection to the remote device.
ssh_keyfile
-
Specifies the SSH key to use to authenticate the connection to the remote device. This value is the path to the key used to authenticate the SSH session. If the value is not specified in the task, the value of environment variable ANSIBLE_NET_SSH_KEYFILE will be used instead.
timeout
-
Default:
10
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.
username
-
Configures the username to use to authenticate the connection to the remote device. This value is used to authenticate the SSH session. If the value is not specified in the task, the value of environment variable ANSIBLE_NET_USERNAME will be used instead.
retries
-
Default:
10
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.
wait_for
-
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.

aliases: waitfor

Notes

Note

  • Tested against VYOS 1.1.7
  • Running 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 command, answer and prompt. See examples.
  • For more information on using Ansible to manage network devices see the Ansible Network Guide

Examples

tasks:
  - name: show configuration on ethernet devices eth0 and eth1
    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_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_command:
      commands:
        - command: 'rollback 1'
          prompt: 'Proceed with reboot? [confirm][y]'
          answer: y

Return Values

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

Key Returned Description
failed_conditions
list
 failed
The list of conditionals that have failed

Sample:
['...', '...']
stdout
list
 always apart from low level errors (such as action plugin)
The set of responses from the commands

Sample:
['...', '...']
stdout_lines
list
 always
The value of stdout split into a list

Sample:
[['...', '...'], ['...'], ['...']]
warnings
list
 always
The list of warnings (if any) generated by module based on arguments

Sample:
['...', '...']


Status

Red Hat Support

More information about Red Hat’s support of this module is available from this Red Hat Knowledge Base article.

Authors

  • Nathaniel Case (@qalthos)

Hint

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