如何在 Ansible 中提示用户输入目标主机? [英] How to prompt user for a target host in Ansible?

问题描述

我想为 Ansible 中的新机器编写一个引导程序剧本，它将重新配置网络设置.在第一次执行时，目标机器会有 DHCP 分配的地址.

I want to write a bootstrapper playbook for new machines in Ansible which will reconfigure the network settings. At the time of the first execution target machines will have DHCP-assigned address.

应该执行剧本的用户知道分配给新机器的 IP 地址.我想提示用户输入值.

The user who is supposed to execute the playbook knows the assigned IP address of a new machine. I would like to prompt the user for is value.

vars_prompt 模块允许从用户那里获取输入，但是它在 hosts 部分下定义有效地防止主机地址作为所需的值.

vars_prompt module allows getting input from the user, however it is defined under hosts section effectively preventing host address as the required value.

是否可以不使用包装脚本修改库存文件?

Is it possible without using a wrapper script modifying inventory file?

推荐答案

正确的做法是使用 add_host 创建一个动态主机，并将其放置在一个新组中，然后针对该组开始新的播放.这样，如果您有其他需要提前设置的连接变量(凭据/密钥/等)，您可以将它们设置在清单中的一个空组上，然后将主机动态添加到其中.例如:

The right way to do this is to create a dynamic host with add_host and place it in a new group, then start a new play that targets that group. That way, if you have other connection vars that need to be set ahead of time (credentials/keys/etc) you could set them on an empty group in inventory, then add the host to it dynamically. For example:

- hosts: localhost
  gather_facts: no
  vars_prompt:
  - name: target_host
    prompt: please enter the target host IP
    private: no
  tasks:
    - add_host:
        name: "{{ target_host }}"
        groups: dynamically_created_hosts

- hosts: dynamically_created_hosts
  tasks:
  - debug: msg="do things on target host here"

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