Ansible：循环变量“item”已在使用中

Question

我想在类似于以下内容的 ansible 中运行任务。

#Task in Playbook

    - name : Include tasks 
      block:
      - name: call example.yml
        include_tasks: "example.yml"
        vars:
          my_var: item
        with_items:
        - [1, 2]

# example.yml

- name: Debug.
  debug:
    msg:
    - "my_var: {{ my_var }}"
  with_inventory_hostnames:
    - 'all'

我希望输出my_var在第一次迭代中打印为值 1，在 playbook 中的循环的第二次迭代中打印为 2。但相反，它正在打印主机名

# Output

TASK [proxysql : Debug.] ************************************************************************************************
 [WARNING]: The loop variable 'item' is already in use. You should set the `loop_var` value in the `loop_control` option for the task to something else to avoid variable collisions and unexpected behavior.
ok: [10.1xx.xx.xx] => (item=None) => {
    "msg": [
        "my_var: 10.134.34.34"
    ]
}
ok: [10.1xx.xx.xx] => (item=None) => {
    "msg": [
        "my_var: 10.123.23.23"
    ]
}
ok: [10.1xx.xx.xx] => (item=None) => {
    "msg": [
        "my_var: 10.112.12.12"
    ]
}

TASK [proxysql : Debug.] ************************************************************************************************
 [WARNING]: The loop variable 'item' is already in use. You should set the `loop_var` value in the `loop_control` option for the task to something else to avoid variable collisions and unexpected behavior.
ok: [10.1xx.xx.xx] => (item=None) => {
    "msg": [
        "my_var: 10.134.34.34"
    ]
}
ok: [10.1xx.xx.xx] => (item=None) => {
    "msg": [
        "my_var: 10.123.23.23"
    ]
}
ok: [10.1xx.xx.xx] => (item=None) => {
    "msg": [
        "my_var: 10.112.12.12"
    ]
}

提前致谢

Answer 1

有两个问题：

1. 在剧本中，任务包含在具有循环变量名称的循环中item，包含的任务也具有循环，并且默认变量名称再次是item。这就是为什么会出现警告消息并解决使用loop_control.

2. my_var: item分配需要符合my_var: "{{ item }}"正确分配的格式。

两次更正后，剧本将如下所示。

  - name : Include tasks 
    block:
    - name: call example.yml
      include_tasks: "example.yml"
      vars:
        my_var: "{{ outer_item }}" 
      with_items:
      - [1, 2]
      loop_control:
        loop_var: outer_item