抗奇异条件行为

Question

当我试图在字典里搜索时，我正面临着一个奇怪的问题。在上面的代码中，我试图用字典"OLD_VLANID_PP“的"name”键的值定义一个新的var "VM_NETWORK_INFOS_PP“。

如果字典是设置的，而不是空的，我希望定义var，否则就跳过任务。为了测试条件是真还是假，我添加了一个调试任务，它应该显示字典的内容。

运行我的剧本时，调试任务确实指示条件不匹配，因此不显示我的字典，但是Ansible继续尝试定义输出中所示的新变量，因此引发了一个错误"'item‘is Un定义“

---
- block:
      #Search VCENTER for PPROD VM (If Windows to create => Search PG / EIther search Postgre)
    - name: Search for PPROD VM already created for the CLIENT {{ CLIENTNAME }} to retrieve VLANID
      set_fact:
        OLD_VMNAME_PP: "{{ item.guest_name }}"
      with_items: "{{ VM_EXIST_PP.virtual_machines }}"
      when: item.guest_name == VMNAME_PP
      delegate_to: localhost

  when: ENV != "PROD" and DEPLOY != "ALL" and (VM_EXIST_PP is defined) and (VM_EXIST_PP|length > 0)

#If we successfully found the previous VM for the client, then get its network info
- name: Retrieve PPROD VM {{ VMNAME_PP }} VLAN ID
  community.vmware.vmware_guest_network:
    hostname: "{{ vcenter_server }}"
    username: "{{ vcenter_user }}"
    password: "{{ vcenter_pass }}"
    datacenter: "{{ datacenter_name }}"
    validate_certs: False
    name: "{{ OLD_VMNAME_PP }}"
    gather_network_info: true
  register: VM_NETWORK_INFOS_PP
  when: (OLD_VMNAME_PP is defined) and OLD_VMNAME_PP != ""

- block:
  
    - debug: msg={{VM_NETWORK_INFOS_PP}}

    #If we successfully found the network info, set the OLD_VLANID with previous VM VLANID
    - set_fact:
        OLD_VLANID_PP: "{{ (item.name) | replace('(HDS : Client)','') | replace('VLAN0','') | replace('VLAN','') | replace(' ','') }}"
      with_items:
        - "{{ VM_NETWORK_INFOS_PP.network_info }}"
      when: item.name | regex_search('VLAN') and not item.name | regex_search('PVLAN')


  when: (VM_NETWORK_INFOS_PP is defined) and VM_NETWORK_INFOS_PP != ""

调试输出(应该显示字典内容)：

ok: [127.0.0.1] => {
    "msg": {
        "changed": false,
        "skip_reason": "Conditional result was False",
        "skipped": true
    }
}

错误输出：

The error was: error while evaluating conditional (item.name | regex_search('VLAN') and not item.name | regex_search('PVLAN')): 'item' is undefined

Ansible版本: 2.10.7 Python版本: 3.7.3

任何帮助都将不胜感激。

谢谢

Answer 1

不确定这是否是正确的做法，但最终使用以下方法解决了这一问题：

when: item is defined and item.name | regex_search('VLAN') and not item.name | regex_search('PVLAN')

注意，项在regex搜索之前定义为。