Question

我正在尝试清理一些预期的错误，并使运行这些手册的操作员更容易理解。下面的代码工作正常，但是我想为每个失败条件分配一个自定义消息。例如，如果var1不等于4，那么我想显示一条消息，说“ lldp邻居中x邻居中没有4个条目”

   - name: Verify Number of bundles for output of show lldp neigh
     set_fact:
       var1: "{{lldp_spine3.data | regex_findall('ae1')}}"
       var2: "{{lldp_spine3.data | regex_findall('ae2')}}"
     failed_when: (var1 != 4) or (var2 | length != 4)

我知道我可以将它们分解并遵循下面的逻辑，但是我想知道我是否可以在单个游戏中完成此任务。

- fail:
    msg: "There were not 4 entries in the lldp neighbor for neighbor x"
  when: var1|length != 4
  
- fail:
    msg: "There were not 4 entries in the lldp neighbor for neighbor y"
  when: var2|length != 4

Answer 1

有assert个模块用于

- assert:
    that: var2|length == 4
    msg: 'lldp should have four neighbors'

更多技巧：

某些声明可以针对localhost运行，并且只能运行一次（例如ansible版本），为此run_once: true。
添加tags: [always]以确保执行断言任务。

Answer 2

使用loop怎么样？

给出剧本：

- hosts: all
  gather_facts: no

  vars:
    var1: abcde
    var2: abcd
      
  tasks:
    - fail:
        msg: "{{ item.msg }}"
      when: item.condition
      loop_control:
        label: "{{ item.item }} is {{ 'invalid' if item.condition else 'valid' }}"
      loop: 
        - msg: There were not 4 entries in the lldp neighbor for neighbor var1
          condition: "{{ var1 | length != 4 }}"
          item: var1
        - msg: There were not 4 entries in the lldp neighbor for neighbor var2
          condition: "{{ var2 | length != 4 }}"
          item: var2

这产生了回顾：

PLAY [all] **********************************************************************************************************

TASK [fail] *********************************************************************************************************
failed: [localhost] (item=var1 is invalid) => {"ansible_loop_var": "item", "changed": false, "item": {"condition": true, "item": "var1", "msg": "There were not 4 entries in the lldp neighbor for neighbor var1"}, "msg": "There were not 4 entries in the lldp neighbor for neighbor var1"}
skipping: [localhost] => (item=var2 is valid) 

PLAY RECAP **********************************************************************************************************
localhost                  : ok=0    changed=0    unreachable=0    failed=1    skipped=0    rescued=0    ignored=0

基于条件的失败消息Ansible失败消息

2 个答案: