Question

我正在尝试为接口变量动态提供字典名称。

我的艰巨任务看起来像这样。

- name: Setting interface list
  set_fact:
    one_fact: "{{ host_name }}_interfaces"

- name: deb
  debug: var={{ one_fact }}

- name: Managing Interfaces
  ios_interface:
    enabled: "{{ item['value']['enabled'] }}"
    name: "{{ item['key'] }}"
    state: "{{ item['value']['state'] }}"
  with_dict: "{{ one_fact }}"

字典看起来像这样

---
h1_interfaces:
  Ethernet1/1:
    description: Firewall
    enabled: true
    speed: auto
    state: present
  Ethernet1/2:
    description: asd
    enabled: true
    speed: auto
    state: present
h2_interfaces:
  Ethernet1/1:
    description: Firewall
    enabled: true
    speed: auto
    state: present
  Ethernet1/2:
    description: asd
    enabled: true
    speed: auto
    state: present

设置with_dict: {{ one_fact }}时出现错误FAILED! => {"msg": "with_dict expects a dict"} 但是当我提供with_dict: {{ h1_interfaces }}时，它就像是一种魅力。我在做什么错了？

Answer 1

显然您也有一个变量host_name，它被设置为h1或h2，并且您想访问字典：h1_interfaces / h2_interfaces

要动态构造变量名并访问其值，应使用lookup plugin，请参见以下任务：

  - name: Setting interface list
    set_fact:
      one_fact: "{{ lookup('vars', myvar + '_interfaces') }}"
    vars:
      myvar: "{{ host_name }}"

和稍作改动的剧本以证明结果：

剧本：

---
- hosts: localhost
  gather_facts: false
  vars:
    host_name: h1
    h1_interfaces:
      Ethernet1/1:
        description: Firewall
        enabled: true
        speed: auto
        state: present
      Ethernet1/2:
        description: asd
        enabled: true
        speed: auto
        state: present
    h2_interfaces:
      Ethernet1/1:
        description: Firewall
        enabled: true
        speed: auto
        state: present
      Ethernet1/2:
        description: asd
        enabled: true
        speed: auto
        state: present
    
 
  tasks:

  - name: Setting interface list
    set_fact:
      one_fact: "{{ lookup('vars', myvar + '_interfaces') }}"
    vars:
      myvar: "{{ host_name }}"

  - name: deb
    debug: var=one_fact

  - name: Managing Interfaces
    debug:
      msg: "enabled: {{ item['value']['enabled'] }}, name: {{ item['key'] }}, state: {{ item['value']['state'] }}"
    with_dict: "{{ one_fact }}"

结果：

TASK [Managing Interfaces] *********************************************************************************************************************************************************************************************
ok: [localhost] => (item={'key': 'Ethernet1/1', 'value': {'description': 'Firewall', 'enabled': True, 'speed': 'auto', 'state': 'present'}}) => {
    "msg": "enabled: True, name: Ethernet1/1, state: present"
}
ok: [localhost] => (item={'key': 'Ethernet1/2', 'value': {'description': 'asd', 'enabled': True, 'speed': 'auto', 'state': 'present'}}) => {
    "msg": "enabled: True, name: Ethernet1/2, state: present"
}

欢呼

当提供set_fact变量时，ansible with_dict失败

1 个答案: