Ansible 按对象字段的值在列表中查找对象

Question

我有这个结构。对于每个主机，这个结构可能有更多或更少的项目。在一项任务中，我想知道是否有一个使用特定名称定义的模块。

---
web_module_list:
  - module_name: LaunchPad 
    module_version: 1.4.0
  - module_name: Manager
    module_version: 1.6.0
  - module_name: NetworkInventory
    module_version: 1.1.4
  - module_name: Reporting
    module_version: 1.0.18
  - module_name: TriadJ
    module_version: 4.1.0-1.1.7

例如，我想知道是否定义了 module_name Reporting，以便为它包含一组任务。

- set_fact:
    reporting: if the web_module_list contains an item with module_name Reporting then true else false
    woprinting: if the web_module_list contains an item with module_name WorkOrderPrinting then true else false


- name: If the reporting module is listed in inventory then execute its tasks
  include: reporting.yml
  when: reporting 

- name: If the work order printing module is listed in inventory then execute its tasks
  include: woprinting.yml
  when: woprinting 

我怎样才能让它工作？
有没有更好的办法？

Answer 1

您可以从您的web_module_list 创建一个键值列表。并检查字符串是否在该列表中:

- name: If the reporting module is listed in inventory then execute its tasks
  include: reporting.yml
  when: "'Reporting' in (web_module_list | map(attribute='module_name') )" 

- name: If the work order printing module is listed in inventory then execute its tasks
  include: woprinting.yml
  when: "'WorkOrderPrinting' in (web_module_list | map(attribute='module_name') )" 

您可能想为列表设置一个事实，这样过滤就不会重复，但对于 Ansible，它是一个清晰的问题，而不是性能问题。