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ansible - 如何在 ansible playbook 中从用户输入中添加主机？

问题描述

我需要从用户的输入中添加一个主机。现在我正在尝试使用 ansiblein-memory inventory模块add_host并prompt添加目标主机来执行剩余的任务。这是我的剧本的内容：

部署.yml

- name: Adding the host server
  hosts: localhost

- vars_prompt:
  - name: "Server IP"
    prompt: "Server"
    private: no

  - name: "Username (default: Ubuntu)"
    prompt: "User"
    default: "Ubuntu"
    private: no

  - name: "Password"
    prompt: "Passwd"
    private: yes
    encrypt: "sha512_crypt"

  - name: "Identity file path"
    prompt: "IdFile"
    private: no
    when: Passwd is undefined

  tasks:
    - name: Add host server
      add_host:
        name: "{{ Server }}"
        ansible_ssh_user: "{{ User }}"
        ansible_ssh_private_key_file: "{{ IdFile }}"
      when: IdFile is defined

    - name: Add host server
      add_host:
        name: "{{ Server }}"
        ansible_ssh_user: "{{ User }}"
        ansible_ssh_pass: "{{ Passwd }}"
      when: Passwd is defined

- hosts: "{{ Server }}"

tasks:
    - name: Copy the script file to the server
      copy:
        src: script.sh
        dest: "{{ ansible_env.HOME }}/folder/"
        mode: 755
        force: yes
        attr:
          - +x

当我用这个命令运行这个剧本时$ ansible-playbook Deploy.yml，输出是：

[WARNING]: provided hosts list is empty, only localhost is available. Note that the implicit localhost does not match 'all'


PLAY [Adding the host server] ***********************************************************************************************

TASK [Gathering Facts] ******************************************************************************************************
ok: [localhost]
Server: <server-ip>
User [Ubuntu]:
Passwd:
IdFile: <path/to/id/file>
ERROR! the field 'hosts' is required but was not set

我不知道为什么会抛出这个错误：

ERROR! the field 'hosts' is required but was not set

我该如何做我需要做的事情？

更新：

它仍然无法正常工作。这是我的剧本的内容：

部署.yml

- name: Adding the host server
  hosts: localhost

  vars_prompt:
  - name: "Server"
    prompt: "Server IP"
    private: no

  - name: "User"
    prompt: "Username"
    default: "Ubuntu"
    private: no

  - name: "Passwd"
    prompt: "Password"
    private: yes
    encrypt: "sha512_crypt"

  - name: "IdFile"
    prompt: "Identity file path"
    private: no
    when: Passwd is undefined

  tasks:
    - name: Add host server
      add_host:
        name: "{{ Server }}"
        ansible_ssh_user: "{{ User }}"
        ansible_ssh_private_key_file: "{{ IdFile }}"
      when: IdFile is defined

    - name: Add host server
      add_host:
        name: "{{ Server }}"
        ansible_ssh_user: "{{ User }}"
        ansible_ssh_pass: "{{ Passwd }}"
      when: IdFile is undefined

- hosts: "{{ Server }}"

  tasks:
    - name: Copy the script file to the server
      copy:
        src: script.sh
        dest: "{{ ansible_env.HOME }}/folder/"
        mode: 755
        force: yes
        attr:
          - +x

当我用这个命令运行这个剧本时$ ansible-playbook Deploy.yml，输出是：

[WARNING]: provided hosts list is empty, only localhost is available. Note that the implicit localhost does not match 'all'


PLAY [Adding the host server] ***********************************************************************************************

TASK [Gathering Facts] ******************************************************************************************************
ok: [localhost]
Server IP: <server-ip>
Username [Ubuntu]:
Password:
Identity file path: <path/to/id/file>
ERROR! the field 'hosts' is required but was not set

我不知道为什么会抛出这个错误：

ERROR! The field 'hosts' has an invalid value, which includes an undefined variable. The error was: 'Server' is undefined

这是剧本应该如何工作的流程图：

+------------------+     +---------------+     +-----------------+
|Use ansible to run|     |Get host IP fom|     |Get ssh User from|
|  this playbook   +---->+ user's input  +---->+  user's input   |
+------------------+     +---------------+     +--------+--------+
                                                        |
                                                        v
                                           +------------+--------+
                                           |Get ssh password from|
                                           |    user's input     |
                                           +------------+--------+
                                                        |
                                                        v
                   +---------------+     *************************
                   |Add a host with| Yes | Did the user inputted |
        v----------+   password    +<---+|      a password?      |
+----------------+ +---------------+     ***************+*********
||Run some tasks||                                      |No
||in recently   ||                                      v
||added host    || +---------------+       +------------+--------+
+----------------+ |Add a host with|       |Get ssh identity file|
        ^----------+ identity file +<------+  from user's input  |
                   +---------------+       +---------------------+

标签： ansibleansible-2.xansible-inventory

解决方案

好的，我已经更新了我的答案以适应您问题的变化，但由于历史原因留下了原始答案。

为了解决您看到的替换错误，这会导致您的第二次播放中出现空主机列表，我将改为使用库存组。

第二部戏还有另外两个语法错误

  1. 文件模式需要是八进制（即0700）
  2. 该属性无效。我的假设是您正在尝试使文件可执行，因此请修复文件模式并删除该属性。

这是一个更新的剧本：

- name: Adding the host server
  hosts: localhost

  vars_prompt:
    - name: "Server"
      prompt: "Server IP"
      private: no

    - name: "User"
      prompt: "Username"
      default: "Ubuntu"
      private: no

    - name: "Passwd"
      prompt: "Password"
      private: yes
      encrypt: "sha512_crypt"

    - name: "IdFile"
      prompt: "Identity file path"
      private: no
      when: Passwd is undefined

  tasks:
    - name: Add host server
      add_host:
        name: "{{ Server }}"
        ansible_ssh_user: "{{ User }}"
        ansible_ssh_private_key_file: "{{ IdFile }}"
        group: added_hosts
      when: IdFile is defined

    - name: Add host server
      add_host:
        name: "{{ Server }}"
        ansible_ssh_user: "{{ User }}"
        ansible_ssh_pass: "{{ Passwd }}"
        group: added_hosts
      when: IdFile is undefined

- hosts: added_hosts

  tasks:
    - name: Copy the script file to the server
      copy:
        src: script.sh
        dest: "{{ ansible_env.HOME }}/folder/"
        mode: 0755
        force: yes

=== 旧答案 ===

用户输入存储在您为name每个变量提示中的属性使用的任何变量中。

您需要在下切换您的name和prompt值vars_prompt

还有 YAML 格式问题

例如：

- vars_prompt:
  - name: "Server IP"
    prompt: "Server"
    private: no

应该：

  vars_prompt:
    - name: "server"
      prompt: "Server IP"
      private: no

然后你可以在你的任务中引用{{ server }}变量

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