如何使用Ansible创建一个空文件? [英] How to create an empty file with Ansible?

问题描述

使用Ansible创建空文件的最简单方法是什么?我知道我可以将一个空文件保存到files目录中，然后将其复制到远程主机，但是我发现这样做有些不满意.

What is the easiest way to create an empty file using Ansible? I know I can save an empty file into the files directory and then copy it to the remote host, but I find that somewhat unsatisfactory.

另一种方法是在远程主机上触摸文件:

Another way is to touch a file on the remote host:

- name: create fake 'nologin' shell
  file: path=/etc/nologin state=touch owner=root group=sys mode=0555

但是随后每次都触摸文件，在日志中显示为黄线，这也不令人满意...

But then the file gets touched every time, showing up as a yellow line in the log, which is also unsatisfactory...

这个简单的问题有更好的解决方案吗?

Is there any better solution to this simple problem?

推荐答案

文件模块的文档说

如果为state=file，则如果文件不存在，则不会创建该文件，如果需要此行为，请参见副本或模板模块.

If state=file, the file will NOT be created if it does not exist, see the copy or template module if you want that behavior.

因此，我们使用复制模块，仅当文件尚不存在时才使用force=no创建一个新的空文件(如果文件存在，则保留其内容).

So we use the copy module, using force=no to create a new empty file only when the file does not yet exist (if the file exists, its content is preserved).

- name: ensure file exists
  copy:
    content: ""
    dest: /etc/nologin
    force: no
    group: sys
    owner: root
    mode: 0555

这是一种声明式的优雅解决方案.

This is a declarative and elegant solution.

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