如何将 Ansible with_items 循环应用于包含的任务? [英] How do I apply an Ansible with_items loop to the included tasks?

问题描述

import_tasks 的文档提到><块引用>

任何循环、条件和大多数其他关键字都将应用于包含的任务，而不是应用于此语句本身.

这正是我想要的.不幸的是，当我尝试使 import_tasks 与循环一起工作时

- import_tasks: msg.ymlwith_items:- 1- 2- 3

我收到消息

<块引用>

错误！您不能在import_tasks"语句上使用循环.您应该改用include_tasks".

我不想要 include_tasks 行为，因为这会将循环应用于包含的文件，并复制任务.我特别想为每个循环变量运行第一个任务(作为一个带有标准 with_items 输出的任务)，然后是第二个，依此类推.我怎样才能得到这种行为?

<小时>

具体来说，请考虑以下事项:

假设我有以下文件:

playbook.yml

---- 主机:192.168.33.100收集事实:没有任务:- include_tasks: msg.ymlwith_items:- 1- 2

msg.yml

---- 名称:消息 1调试:msg: "消息 1: {{ item }}"- 名称:消息 2调试:msg: "消息 2: {{ item }}"

我想要打印的消息

<块引用>

消息 1:1
消息 1:2
消息 2:1
消息 2:2

但是，使用 import_tasks 时出现错误，使用 include_tasks 时出现错误

<块引用>

消息 1:1
消息 2:1
消息 1:2
消息 2:2

解决方案

您可以添加一个 with_items 循环，为导入文件中的每个任务添加一个列表，并调用 import_tasks 带有您传递给内部 with_items 循环的变量.这会将循环的处理移至导入的文件，并且需要在所有任务上重复循环.

<小时>

以您的示例为例，这会将文件更改为:

playbook.yml

---- 主机:192.168.33.100收集事实:没有任务:- 导入任务:msg.yml变量:消息:- 1- 2

msg.yml

---- 名称:消息 1调试:msg: "消息 1: {{ item }}"with_items:- {{消息}}"- 名称:消息 2调试:msg: "消息 2: {{ item }}"with_items:- {{消息}}"

The documentation for import_tasks mentions

Any loops, conditionals and most other keywords will be applied to the included tasks, not to this statement itself.

This is exactly what I want. Unfortunately, when I attempt to make import_tasks work with a loop

- import_tasks: msg.yml
  with_items:
    - 1
    - 2
    - 3

I get the message

ERROR! You cannot use loops on 'import_tasks' statements. You should use 'include_tasks' instead.

I don't want the include_tasks behaviour, as this applies the loop to the included file, and duplicates the tasks. I specifically want to run the first task for each loop variable (as one task with the standard with_items output), then the second, and so on. How can I get this behaviour?

---

Specifically, consider the following:

Suppose I have the following files:

playbook.yml

---                       

- hosts: 192.168.33.100
  gather_facts: no
  tasks:
  - include_tasks: msg.yml
    with_items:
      - 1
      - 2

msg.yml

---

- name: Message 1
  debug:
    msg: "Message 1: {{ item }}"

- name: Message 2
  debug:
    msg: "Message 2: {{ item }}"

I would like the printed messages to be

Message 1: 1
Message 1: 2
Message 2: 1
Message 2: 2

However, with import_tasks I get an error, and with include_tasks I get

Message 1: 1
Message 2: 1
Message 1: 2
Message 2: 2

解决方案

You can add a with_items loop taking a list to every task in the imported file, and call import_tasks with a variable which you pass to the inner with_items loop. This moves the handling of the loops to the imported file, and requires duplication of the loop on all tasks.

---

Given your example, this would change the files to:

playbook.yml

---

- hosts: 192.168.33.100
  gather_facts: no
  tasks:
  - import_tasks: msg.yml
    vars:
      messages:
        - 1
        - 2

msg.yml

---

- name: Message 1
  debug:
    msg: "Message 1: {{ item }}"
  with_items:
    - "{{ messages }}"

- name: Message 2
  debug:
    msg: "Message 2: {{ item }}"
  with_items:
    - "{{ messages }}"

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