ansible 'raw'、'shell' 和 'command' 之间有什么区别? [英] Whats the difference between ansible 'raw', 'shell' and 'command'?

问题描述

ansible playbook 中的 raw、shell 和 command 有什么区别?什么时候使用哪个?

What is the difference between raw, shell and command in the ansible playbook? And when to use which?

推荐答案

command:在目标主机上执行远程命令，在其他 playbook 任务的同一个 shell 中.
它可用于启动脚本 (.sh) 或执行简单命令.例如:

command: executes a remote command on target host, in the same shell of other playbook's tasks.
It can be used for launch scripts (.sh) or for execute simple commands. For example:

- name: Cat a file
  command: cat somefile.txt

- name: Execute a script
  command: somescript.sh param1 param2

shell:在目标主机上执行远程命令，打开一个新外壳 (/bin/sh).
如果您想执行更复杂的命令，例如与管道连接的命令，则可以使用它.例如:

shell: executes a remote command on target host, opening a new shell (/bin/sh).
It can be used if you want to execute more complex commands, for example commands concatenated with pipes. For example:

- name: Look for something in a file
  shell: cat somefile.txt | grep something

raw:执行缺少解释器的低级命令目标主机，一个常见的用例是安装 python.不应在所有其他情况下使用此模块(建议使用 command 和 shell)

raw: executes low-level commands where interpreter is missing on target host, a common use case is for installing python. This module should not be used in all other cases (where command and shell are suggested)

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