在主持人劇本中創建if ... else語句的正確方法/語法

Question

我嘗試創建一個條件邏輯，以基於從命令行傳入的環境變量「branch」針對不同的節點組運行。

下面是我的代碼示例。 分支是我傳入的變量。如果branch =='test'，我將選擇組的'upgrade-CI-test'作爲targeted_host作爲我的下一個任務，除test之外的任何內容都將保留變量的值「upgrade_version」

但是，由於某些原因，我無法在測試組上執行「從升級機器中刪除舊腳本」。我不確定這是否是正確的設置變量？我是新手，任何提示將不勝感激。

--- 
- name: Set targeted hosts based on git branch 
    hosts: localhost 
    tasks: 
    - name: Set hosts variable 
    vars: 
     targeted_host: "{{groups['upgrade-CI-test'] if branch == 'test' else upgrade_version }}" 
    debug: 
     var: targeted_host 
- name: Remove old scripts from upgrade machine 
    hosts: targeted_host 
    tasks: 
    - name: Remove any old wrapper scripts 
    win_file: 
     path: D:\my_path 
     state: absent 

Answer 1

如果你有劇本分析時定義branch和upgrade_version變量，那麼你可以這樣做：

--- 
- name: Remove old scripts from upgrade machine 
    hosts: "{{ 'upgrade-CI-test' if branch == 'test' else upgrade_version }}" 
    tasks: 
    - name: Remove any old wrapper scripts 
     win_file: 
     path: D:\my_path 
     state: absent 

更新：如果您有多個播放時，您可以使用group_by進行動態組和使用它適合你的戲劇。

--- 
- name: Make dynamic group 
    hosts: "{{ 'upgrade-CI-test' if branch == 'test' else upgrade_version }}" 
    tasks: 
    - group_by: 
     key: my_new_group 

- name: Remove old scripts from upgrade machine 
    hosts: my_new_group 
    tasks: 
    - name: Remove any old wrapper scripts 
     win_file: 
     path: D:\my_path 
     state: absent 

- name: Do some other stuff 
    hosts: my_new_group 
    tasks: 
    - debug: 
     msg: hello