如何使用带变量的通配符 [英] How to use wildcard with variable

问题描述

我想按主机名列出文件.但是问题是我不能正确使用带变量的通配符.有人可以建议我这样做吗.

I want to list the files as per the host name.But problem is i not able to use the wildcard with variable properly.Can someone suggest me on this.

    ---
    - hosts: local
      become_user: yes
      vars:
          filename: /root/stuff

      tasks:
           - name: list files
             action: command ls -lrt {{ filename }}/'*{{ansible_hostname}}'
             register: listfiles

           - debug: var=listfiles

推荐答案

如果您的问题是为什么*不能扩展?，那么:

If your question is why * doesn't expand?, then:

command模块:

命令模块采用命令名称，后跟由空格分隔的参数列表.给定的命令将在所有选定的节点上执行.它不会通过外壳进行处理，因此$ HOME之类的变量以及<"，>，" |和"&之类的操作将无法正常工作

The command module takes the command name followed by a list of space-delimited arguments. The given command will be executed on all selected nodes. It will not be processed through the shell, so variables like $HOME and operations like "<", ">", "|", and "&" will not work

shell模块:

shell模块采用命令名称，后跟由空格分隔的参数列表.几乎与命令模块完全一样，但是通过远程节点上的外壳程序(/bin/sh)运行命令.

The shell module takes the command name followed by a list of space-delimited arguments. It is almost exactly like the command module but runs the command through a shell (/bin/sh) on the remote node.

因此，如果您需要任何shell技巧，例如通配符扩展或访问环境变量，请使用shell模块.

So if you need any shell tricks, like wildcard expansion or access to environment variables, use shell module.

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