在ansible实战手册中创建循环-错误

Question

实战手册

---
- name: task 11
  hosts: prod
  vars_files:
    - users_pass.yml
  tasks:
    - name: create group profs
      group:
        name: profs
        state: present

    - name: create users who have depart set as profs
      user:
        name: "{{ item.uname }}"
        groups: "{{ item.department }}"
        shell: /bin/bash
        password: "{{ item.password | password_hash ('sha256') }}"
      when: "'{{ item.department }}'=='profs'"
      loop: " {{ users }} "

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
#the users_pass.yml
---
users:
- uname: linda
  password: password
  department: profs

- uname: lisa
  password: secret
  department: profs

- uname: anna
  password: geheim
  department: students

当运行上面提到的剧本并添加这个var文件时，我得到以下错误：

fatal: [ansible5]: FAILED! => {
    "msg": "Invalid data passed to 'loop', it requires a list, got this instead:  [{'uname': 'linda', 'password': 'password', 'department': 'profs'}, {'uname': 'lisa', 'password': 'secret', 'department': 'profs'}, {'uname': 'anna', 'password': 'geheim', 'department': 'students'}] . Hint: If you passed a list/dict of just one element, try adding wantlist=True to your lookup invocation or use q/query instead of lookup."
}

我真的不明白，我确信我的变量声明是正确的。有什么需要帮忙的吗？

Answer 1

我认为问题是由于loop变量中引号中的空格造成的，即" {{ users }} "。由于使用Jinja分隔符{{，when条件中可能存在另一个“隐藏”问题。

总体而言，它应该与以下更改一起工作：

    - name: create users who have depart set as profs
      user:
        name: "{{ item.uname }}"
        groups: "{{ item.department }}"
        shell: /bin/bash
        password: "{{ item.password|password_hash('sha256') }}"
      when: item.department == "profs"
      loop: "{{ users }}"