salt.states.cmd

Execution of arbitrary commands

The cmd state module manages the enforcement of executed commands, this state can tell a command to run under certain circumstances.

A simple example to execute a command:

# Store the current date in a file
'date > /tmp/salt-run':
  cmd.run

Only run if another execution failed, in this case truncate syslog if there is no disk space:

'> /var/log/messages/':
  cmd.run:
    - unless: echo 'foo' > /tmp/.test && rm -f /tmp/.test

Only run if the file specified by creates does not exist, in this case touch /tmp/foo if it does not exist:

touch /tmp/foo:
  cmd.run:
    - creates: /tmp/foo

creates also accepts a list of files, in which case this state will run if any of the files do not exist:

"echo 'foo' | tee /tmp/bar > /tmp/baz":
  cmd.run:
    - creates:
      - /tmp/bar
      - /tmp/baz

Note

The creates option was added to the cmd state in version 2014.7.0, and made a global requisite in 3001.

Sometimes when running a command that starts up a daemon, the init script doesn't return properly which causes Salt to wait indefinitely for a response. In situations like this try the following:

run_installer:
  cmd.run:
    - name: /tmp/installer.bin > /dev/null 2>&1

Salt determines whether the cmd state is successfully enforced based on the exit code returned by the command. If the command returns a zero exit code, then salt determines that the state was successfully enforced. If the script returns a non-zero exit code, then salt determines that it failed to successfully enforce the state. If a command returns a non-zero exit code but you wish to treat this as a success, then you must place the command in a script and explicitly set the exit code of the script to zero.

Please note that the success or failure of the state is not affected by whether a state change occurred nor the stateful argument.

When executing a command or script, the state (i.e., changed or not) of the command is unknown to Salt's state system. Therefore, by default, the cmd state assumes that any command execution results in a changed state.

This means that if a cmd state is watched by another state then the state that's watching will always be executed due to the changed state in the cmd state.

Using the "Stateful" Argument

Many state functions in this module now also accept a stateful argument. If stateful is specified to be true then it is assumed that the command or script will determine its own state and communicate it back by following a simple protocol described below:

  1. If there's nothing in the stdout of the command, then assume no changes. Otherwise, the stdout must be either in JSON or its last non-empty line must be a string of key=value pairs delimited by spaces (no spaces on either side of =).

  2. If it's JSON then it must be a JSON object (e.g., {}). If it's key=value pairs then quoting may be used to include spaces. (Python's shlex module is used to parse the key=value string)

    Two special keys or attributes are recognized in the output:

    changed: bool (i.e., 'yes', 'no', 'true', 'false', case-insensitive)
comment: str  (i.e., any string)

    So, only if changed is True then assume the command execution has changed the state, and any other key values or attributes in the output will be set as part of the changes.

  3. If there's a comment then it will be used as the comment of the state.

    Here's an example of how one might write a shell script for use with a stateful command:

    #!/bin/bash
#
echo "Working hard..."

# writing the state line
echo  # an empty line here so the next line will be the last.
echo "changed=yes comment='something has changed' whatever=123"

    And an example SLS file using this module:

    Run myscript:
  cmd.run:
    - name: /path/to/myscript
    - cwd: /
    - stateful: True

Run only if myscript changed something:
  cmd.run:
    - name: echo hello
    - cwd: /
    - onchanges:
        - cmd: Run myscript

    Note that if the second cmd.run state also specifies stateful: True it can then be watched by some other states as well.

  4. The stateful argument can optionally include a test_name parameter.

    This is used to specify a command to run in test mode. This command should return stateful data for changes that would be made by the command in the name parameter.

    New in version 2015.2.0.

    Run myscript:
  cmd.run:
    - name: /path/to/myscript
    - cwd: /
    - stateful:
      - test_name: /path/to/myscript test

Run masterscript:
  cmd.script:
    - name: masterscript
    - source: salt://path/to/masterscript
    - cwd: /
    - stateful:
      - test_name: masterscript test

Should I use cmd.run or cmd.wait?

Note

Use cmd.run together with onchanges instead of cmd.wait.

These two states are often confused. The important thing to remember about them is that cmd.run states are run each time the SLS file that contains them is applied. If it is more desirable to have a command that only runs after some other state changes, then cmd.wait does just that. cmd.wait is designed to watch other states, and is executed when the state it is watching changes. Example:

/usr/local/bin/postinstall.sh:
  cmd.wait:
    - watch:
      - pkg: mycustompkg
  file.managed:
    - source: salt://utils/scripts/postinstall.sh

mycustompkg:
  pkg.installed:
    - require:
      - file: /usr/local/bin/postinstall.sh

cmd.wait itself do not do anything; all functionality is inside its mod_watch function, which is called by watch on changes.

The preferred format is using the onchanges Requisite, which works on cmd.run as well as on any other state. The example would then look as follows:

/usr/local/bin/postinstall.sh:
  cmd.run:
    - onchanges:
      - pkg: mycustompkg
  file.managed:
    - source: salt://utils/scripts/postinstall.sh

mycustompkg:
  pkg.installed:
    - require:
      - file: /usr/local/bin/postinstall.sh

How do I create an environment from a pillar map?

The map that comes from a pillar can be directly consumed by the env option! To use it, one may pass it like this. Example:

printenv:
  cmd.run:
    - env: {{ salt['pillar.get']('example:key', {}) }}

Better yet, use the slots feature to insert the data at runtime and minimize pillar data exposure:

printenv:
  cmd.run:
    - env: __slot__:salt:pillar.get(example:key)

How do I pass sensitive data to a command?

Passing sensitive data to commands using command line arguments or environment variables is a well-known security loophole and is not recommended.

If your command can read from stdin, use the stdin option in combination with the slots feature. Example:

my-command --read-secret-from-stdin:
  cmd.run:
    - stdin: __slot__:salt:pillar.get(example:secret)

Some commands read from stdin when "-" is passed as an input file:

gcc - -x c -o ./myprogram:
  cmd.run:
    - stdin: __slot__:salt:pillar.get(example:my_super_secret_c_code)

If your command can read from a file and is running on a Unix-ish system, pass /dev/stdin as the file and feed the data to stdin. Example:

step ca certificate server.example.com cert.pem key.pem --provisioner JWK --provisioner-password-file /dev/stdin:
  cmd.run:
    - stdin: __slot__:salt:pillar.get(server:provisioner_password)
    - unless: step certificate needs-renewal cert.pem 2>&1 | grep "certificate does not need renewal"

Note: The use of the runas option or sudo will cause permission errors when reading /dev/stdin. If you need to run as a specific user the command will have to read from the usual internal stdin file descriptor.

The use of the slots feature keeps minions who can render the state file from stealing the password.

salt.states.cmd.call(name, func, args=(), kws=None, output_loglevel='debug', hide_output=False, use_vt=False, **kwargs)

Invoke a pre-defined Python function with arguments specified in the state declaration. This function is mainly used by the salt.renderers.pydsl renderer.

In addition, the stateful argument has no effects here.

The return value of the invoked function will be interpreted as follows.

If it's a dictionary then it will be passed through to the state system, which expects it to have the usual structure returned by any salt state function.

Otherwise, the return value (denoted as result in the code below) is expected to be a JSON serializable object, and this dictionary is returned:

{
    'name': name
    'changes': {'retval': result},
    'result': True if result is None else bool(result),
    'comment': result if isinstance(result, str) else ''
}
salt.states.cmd.mod_watch(name, **kwargs)

Execute a cmd function based on a watch call

Note

This state exists to support special handling of the watch requisite. It should not be called directly.

Parameters for this function should be set by the state being triggered.

salt.states.cmd.run(name, cwd=None, root=None, runas=None, shell=None, env=None, prepend_path=None, stateful=False, output_loglevel='debug', hide_output=False, timeout=None, ignore_timeout=False, use_vt=False, success_retcodes=None, success_stdout=None, success_stderr=None, **kwargs)

Run a command if certain circumstances are met. Use cmd.wait if you want to use the watch requisite.

Note

The **kwargs of cmd.run are passed down to one of the following exec modules:

  • cmdmod.run_all: If used with default runas

  • cmdmod.run_chroot: If used with non-root value for runas

For more information on what args are available for either of these, refer to the cmdmod documentation.

name

The command to execute, remember that the command will execute with the path and permissions of the salt-minion.

cwd

The current working directory to execute the command in, defaults to /root

root

Path to the root of the jail to use. If this parameter is set, the command will run inside a chroot

runas

The user name (or uid) to run the command as

shell

The shell to use for execution, defaults to the shell grain

env

A list of environment variables to be set prior to execution. Example:

script-foo:
  cmd.run:
    - env:
      - BATCH: 'yes'

Warning

The above illustrates a common PyYAML pitfall, that yes, no, on, off, true, and false are all loaded as boolean True and False values, and must be enclosed in quotes to be used as strings. More info on this (and other) PyYAML idiosyncrasies can be found here.

Variables as values are not evaluated. So $PATH in the following example is a literal '$PATH':

script-bar:
  cmd.run:
    - env: "PATH=/some/path:$PATH"

One can still use the existing $PATH by using a bit of Jinja:

{% set current_path = salt['environ.get']('PATH', '/bin:/usr/bin') %}

mycommand:
  cmd.run:
    - name: ls -l /
    - env:
      - PATH: {{ [current_path, '/my/special/bin']|join(':') }}

Note

When using environment variables on Windows, case-sensitivity matters, i.e. Windows uses Path as opposed to PATH for other systems.

prepend_path

$PATH segment to prepend (trailing ':' not necessary) to $PATH. This is an easier alternative to the Jinja workaround.

New in version 2018.3.0.

stateful

The command being executed is expected to return data about executing a state. For more information, see the Using the "Stateful" Argument section.

output_logleveldebug

Control the loglevel at which the output from the command is logged to the minion log.

Note

The command being run will still be logged at the debug loglevel regardless, unless quiet is used for this value.

hide_outputFalse

Suppress stdout and stderr in the state's results.

Note

This is separate from output_loglevel, which only handles how Salt logs to the minion log.

New in version 2018.3.0.

timeout

If the command has not terminated after timeout seconds, send the subprocess sigterm, and if sigterm is ignored, follow up with sigkill

ignore_timeout

Ignore the timeout of commands, which is useful for running nohup processes.

New in version 2015.8.0.

creates

Only run if the file specified by creates do not exist. If you specify a list of files then this state will only run if any of the files do not exist.

New in version 2014.7.0.

use_vtFalse

Use VT utils (saltstack) to stream the command output more interactively to the console and the logs. This is experimental.

bgFalse

If True, run command in background and do not await or deliver its results.

New in version 2016.3.6.

success_retcodes

This parameter allows you to specify a list of non-zero return codes that should be considered as successful. If the return code from the command matches any in the list, the state will have a True result instead of False.

New in version 2019.2.0.

success_stdout: This parameter will allow a list of

strings that when found in standard out should be considered a success. If stdout returned from the run matches any in the provided list, the return code will be overridden with zero.

New in version 3004.

success_stderr: This parameter will allow a list of

strings that when found in standard error should be considered a success. If stderr returned from the run matches any in the provided list, the return code will be overridden with zero.

New in version 3004.

Note

cmd.run supports the usage of reload_modules. This functionality allows you to force Salt to reload all modules. You should only use reload_modules if your cmd.run does some sort of installation (such as pip), if you do not reload the modules future items in your state which rely on the software being installed will fail.

getpip:
  cmd.run:
    - name: /usr/bin/python /usr/local/sbin/get-pip.py
    - unless: which pip
    - require:
      - pkg: python
      - file: /usr/local/sbin/get-pip.py
    - reload_modules: True
salt.states.cmd.script(name, source=None, template=None, cwd=None, runas=None, password=None, shell=None, env=None, stateful=False, timeout=None, use_vt=False, output_loglevel='debug', hide_output=False, defaults=None, context=None, success_retcodes=None, success_stdout=None, success_stderr=None, **kwargs)

Download a script and execute it with specified arguments.

source

The location of the script to download. If the file is located on the master in the directory named spam, and is called eggs, the source string is salt://spam/eggs

template

If this setting is applied then the named templating engine will be used to render the downloaded file. Currently jinja, mako, and wempy are supported

name

Either "cmd arg1 arg2 arg3..." (cmd is not used) or a source "salt://...".

cwd

The current working directory to execute the command in, defaults to /root

runas

Specify an alternate user to run the command. The default behavior is to run as the user under which Salt is running. If running on a Windows minion you must also use the password argument, and the target user account must be in the Administrators group.

Note

For Windows users, specifically Server users, it may be necessary to specify your runas user using the User Logon Name instead of the legacy logon name. Traditionally, logons would be in the following format.

Domain/user

In the event this causes issues when executing scripts, use the UPN format which looks like the following.

user@domain.local

More information <https://github.com/saltstack/salt/issues/55080>

password

New in version 3000: Windows only. Required when specifying runas. This parameter will be ignored on non-Windows platforms.

shell

The shell to use for execution. The default is set in grains['shell']

env

A list of environment variables to be set prior to execution. Example:

salt://scripts/foo.sh:
  cmd.script:
    - env:
      - BATCH: 'yes'

Warning

The above illustrates a common PyYAML pitfall, that yes, no, on, off, true, and false are all loaded as boolean True and False values, and must be enclosed in quotes to be used as strings. More info on this (and other) PyYAML idiosyncrasies can be found here.

Variables as values are not evaluated. So $PATH in the following example is a literal '$PATH':

salt://scripts/bar.sh:
  cmd.script:
    - env: "PATH=/some/path:$PATH"

One can still use the existing $PATH by using a bit of Jinja:

{% set current_path = salt['environ.get']('PATH', '/bin:/usr/bin') %}

mycommand:
  cmd.run:
    - name: ls -l /
    - env:
      - PATH: {{ [current_path, '/my/special/bin']|join(':') }}

Note

When using environment variables on Windows, case-sensitivity matters, i.e. Windows uses Path as opposed to PATH for other systems.

saltenvbase

The Salt environment to use

stateful

The command being executed is expected to return data about executing a state. For more information, see the Using the "Stateful" Argument section.

timeout

If the command has not terminated after timeout seconds, send the subprocess sigterm, and if sigterm is ignored, follow up with sigkill

args

String of command line args to pass to the script. Only used if no args are specified as part of the name argument. To pass a string containing spaces in YAML, you will need to doubly-quote it: "arg1 'arg two' arg3"

creates

Only run if the file specified by creates do not exist. If you specify a list of files then this state will only run if any of the files do not exist.

New in version 2014.7.0.

use_vt

Use VT utils (saltstack) to stream the command output more interactively to the console and the logs. This is experimental.

context

New in version 2016.3.0.

Overrides default context variables passed to the template.

defaults

New in version 2016.3.0.

Default context passed to the template.

output_logleveldebug

Control the loglevel at which the output from the command is logged to the minion log.

Note

The command being run will still be logged at the debug loglevel regardless, unless quiet is used for this value.

hide_outputFalse

Suppress stdout and stderr in the state's results.

Note

This is separate from output_loglevel, which only handles how Salt logs to the minion log.

New in version 2018.3.0.

success_retcodes

This parameter allows you to specify a list of non-zero return codes that should be considered as successful. If the return code from the command matches any in the list, the state will have a True result instead of False.

New in version 2019.2.0.

success_stdout: This parameter will allow a list of

strings that when found in standard out should be considered a success. If stdout returned from the run matches any in the provided list, the return code will be overridden with zero.

New in version 3004.

success_stderr: This parameter will allow a list of

strings that when found in standard error should be considered a success. If stderr returned from the run matches any in the provided list, the return code will be overridden with zero.

New in version 3004.

salt.states.cmd.wait(name, cwd=None, root=None, runas=None, shell=None, env=(), stateful=False, output_loglevel='debug', hide_output=False, use_vt=False, success_retcodes=None, success_stdout=None, success_stderr=None, **kwargs)

Run the given command only if the watch statement calls it.

Note

Use cmd.run together with onchanges instead of cmd.wait.

name

The command to execute, remember that the command will execute with the path and permissions of the salt-minion.

cwd

The current working directory to execute the command in, defaults to /root

root

Path to the root of the jail to use. If this parameter is set, the command will run inside a chroot

runas

The user name to run the command as

shell

The shell to use for execution, defaults to /bin/sh

env

A list of environment variables to be set prior to execution. Example:

script-foo:
  cmd.wait:
    - env:
      - BATCH: 'yes'

Warning

The above illustrates a common PyYAML pitfall, that yes, no, on, off, true, and false are all loaded as boolean True and False values, and must be enclosed in quotes to be used as strings. More info on this (and other) PyYAML idiosyncrasies can be found here.

Variables as values are not evaluated. So $PATH in the following example is a literal '$PATH':

script-bar:
  cmd.wait:
    - env: "PATH=/some/path:$PATH"

One can still use the existing $PATH by using a bit of Jinja:

{% set current_path = salt['environ.get']('PATH', '/bin:/usr/bin') %}

mycommand:
  cmd.run:
    - name: ls -l /
    - env:
      - PATH: {{ [current_path, '/my/special/bin']|join(':') }}

Note

When using environment variables on Windows, case-sensitivity matters, i.e. Windows uses Path as opposed to PATH for other systems.

stateful

The command being executed is expected to return data about executing a state. For more information, see the Using the "Stateful" Argument section.

creates

Only run if the file specified by creates do not exist. If you specify a list of files then this state will only run if any of the files do not exist.

New in version 2014.7.0.

output_logleveldebug

Control the loglevel at which the output from the command is logged to the minion log.

Note

The command being run will still be logged at the debug loglevel regardless, unless quiet is used for this value.

hide_outputFalse

Suppress stdout and stderr in the state's results.

Note

This is separate from output_loglevel, which only handles how Salt logs to the minion log.

New in version 2018.3.0.

use_vt

Use VT utils (saltstack) to stream the command output more interactively to the console and the logs. This is experimental.

success_retcodes

This parameter allows you to specify a list of non-zero return codes that should be considered as successful. If the return code from the command matches any in the list, the state will have a True result instead of False.

New in version 2019.2.0.

success_stdout: This parameter will allow a list of

strings that when found in standard out should be considered a success. If stdout returned from the run matches any in the provided list, the return code will be overridden with zero.

New in version 3004.

success_stderr: This parameter will allow a list of

strings that when found in standard error should be considered a success. If stderr returned from the run matches any in the provided list, the return code will be overridden with zero.

New in version 3004.

salt.states.cmd.wait_call(name, func, args=(), kws=None, stateful=False, use_vt=False, output_loglevel='debug', hide_output=False, **kwargs)
salt.states.cmd.wait_script(name, source=None, template=None, cwd=None, runas=None, shell=None, env=None, stateful=False, use_vt=False, output_loglevel='debug', hide_output=False, success_retcodes=None, success_stdout=None, success_stderr=None, **kwargs)

Download a script from a remote source and execute it only if a watch statement calls it.

source

The source script being downloaded to the minion, this source script is hosted on the salt master server. If the file is located on the master in the directory named spam, and is called eggs, the source string is salt://spam/eggs

template

If this setting is applied then the named templating engine will be used to render the downloaded file, currently jinja, mako, and wempy are supported

name

The command to execute, remember that the command will execute with the path and permissions of the salt-minion.

cwd

The current working directory to execute the command in, defaults to /root

runas

The user name to run the command as

shell

The shell to use for execution, defaults to the shell grain

env

A list of environment variables to be set prior to execution. Example:

salt://scripts/foo.sh:
  cmd.wait_script:
    - env:
      - BATCH: 'yes'

Warning

The above illustrates a common PyYAML pitfall, that yes, no, on, off, true, and false are all loaded as boolean True and False values, and must be enclosed in quotes to be used as strings. More info on this (and other) PyYAML idiosyncrasies can be found here.

Variables as values are not evaluated. So $PATH in the following example is a literal '$PATH':

salt://scripts/bar.sh:
  cmd.wait_script:
    - env: "PATH=/some/path:$PATH"

One can still use the existing $PATH by using a bit of Jinja:

{% set current_path = salt['environ.get']('PATH', '/bin:/usr/bin') %}

mycommand:
  cmd.run:
    - name: ls -l /
    - env:
      - PATH: {{ [current_path, '/my/special/bin']|join(':') }}

Note

When using environment variables on Windows, case-sensitivity matters, i.e. Windows uses Path as opposed to PATH for other systems.

stateful

The command being executed is expected to return data about executing a state. For more information, see the Using the "Stateful" Argument section.

use_vt

Use VT utils (saltstack) to stream the command output more interactively to the console and the logs. This is experimental.

output_logleveldebug

Control the loglevel at which the output from the command is logged to the minion log.

Note

The command being run will still be logged at the debug loglevel regardless, unless quiet is used for this value.

hide_outputFalse

Suppress stdout and stderr in the state's results.

Note

This is separate from output_loglevel, which only handles how Salt logs to the minion log.

New in version 2018.3.0.

success_retcodes

This parameter allows you to specify a list of non-zero return codes that should be considered as successful. If the return code from the command matches any in the list, the state will have a True result instead of False.

New in version 2019.2.0.

success_stdout: This parameter will allow a list of

strings that when found in standard out should be considered a success. If stdout returned from the run matches any in the provided list, the return code will be overridden with zero.

New in version 3004.

success_stderr: This parameter will allow a list of

strings that when found in standard error should be considered a success. If stderr returned from the run matches any in the provided list, the return code will be overridden with zero.

New in version 3004.

salt.states.cmd.watch(name, cwd=None, root=None, runas=None, shell=None, env=(), stateful=False, output_loglevel='debug', hide_output=False, use_vt=False, success_retcodes=None, success_stdout=None, success_stderr=None, **kwargs)

This function is an alias of wait.

Run the given command only if the watch statement calls it.

Note

Use cmd.run together with onchanges instead of cmd.wait.

name

The command to execute, remember that the command will execute with the path and permissions of the salt-minion.

cwd

The current working directory to execute the command in, defaults to /root

root

Path to the root of the jail to use. If this parameter is set, the command will run inside a chroot

runas

The user name to run the command as

shell

The shell to use for execution, defaults to /bin/sh

env

A list of environment variables to be set prior to execution. Example:

script-foo:
  cmd.wait:
    - env:
      - BATCH: 'yes'

Warning

The above illustrates a common PyYAML pitfall, that yes, no, on, off, true, and false are all loaded as boolean True and False values, and must be enclosed in quotes to be used as strings. More info on this (and other) PyYAML idiosyncrasies can be found here.

Variables as values are not evaluated. So $PATH in the following example is a literal '$PATH':

script-bar:
  cmd.wait:
    - env: "PATH=/some/path:$PATH"

One can still use the existing $PATH by using a bit of Jinja:

{% set current_path = salt['environ.get']('PATH', '/bin:/usr/bin') %}

mycommand:
  cmd.run:
    - name: ls -l /
    - env:
      - PATH: {{ [current_path, '/my/special/bin']|join(':') }}

Note

When using environment variables on Windows, case-sensitivity matters, i.e. Windows uses Path as opposed to PATH for other systems.

stateful

The command being executed is expected to return data about executing a state. For more information, see the Using the "Stateful" Argument section.

creates

Only run if the file specified by creates do not exist. If you specify a list of files then this state will only run if any of the files do not exist.

New in version 2014.7.0.

output_logleveldebug

Control the loglevel at which the output from the command is logged to the minion log.

Note

The command being run will still be logged at the debug loglevel regardless, unless quiet is used for this value.

hide_outputFalse

Suppress stdout and stderr in the state's results.

Note

This is separate from output_loglevel, which only handles how Salt logs to the minion log.

New in version 2018.3.0.

use_vt

Use VT utils (saltstack) to stream the command output more interactively to the console and the logs. This is experimental.

success_retcodes

This parameter allows you to specify a list of non-zero return codes that should be considered as successful. If the return code from the command matches any in the list, the state will have a True result instead of False.

New in version 2019.2.0.

success_stdout: This parameter will allow a list of

strings that when found in standard out should be considered a success. If stdout returned from the run matches any in the provided list, the return code will be overridden with zero.

New in version 3004.

success_stderr: This parameter will allow a list of

strings that when found in standard error should be considered a success. If stderr returned from the run matches any in the provided list, the return code will be overridden with zero.

New in version 3004.

Generated on October 23, 2024 at 09:06:04 UTC.

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