PROSAGA码农传奇-ansible-每个唯一的事实值只运行一次ansible任务

每个唯一的事实值只运行一次ansible任务

作者: 一生浮华
发布时间: 2024-04-25 05:52:24 (10天前)
转自：

<div class =“post-text”itemprop =“text”>
  
    一个选择是
  
  <UL>
    <LI>
      <a href="https://docs.ansible.com/ansible/latest/modules/group_by_module.html" rel="nofollow noreferrer">
        通过...分组
      </A>
       cluster_number
    </LI>
    <LI>
      <a href="https://docs.ansible.com/ansible/latest/user_guide/playbooks_delegation.html#run-once" rel="nofollow noreferrer">
        run_once
      </A>
       群集号码循环
    </LI>
    <LI>
      并从每个组中选择第一个主机。
    </LI>
  </UL>
  
    比如给出了
    
      主机
    
  
   <pre>
 <code>
 [test]
test01 cluster_number='1'
test02 cluster_number='1'
test03 cluster_number='1'
test04 cluster_number='1'
test05 cluster_number='1'
test06 cluster_number='2'
test07 cluster_number='2'
test08 cluster_number='2'
test09 cluster_number='3'
test10 cluster_number='3'
[test:vars]
cluster_numbers=['1','2','3']

</code>
 </pre>
  
    以下剧本
  
   <pre>
 <code>
 - hosts: all
 gather_facts: no
 tasks:
 - group_by: key=cluster_{{ cluster_number }}
 - debug: var=groups['cluster_{{ item }}'][0]
 loop: "{{ cluster_numbers }}"
 run_once: true

</code>
 </pre>
  
    给
  
   <pre>
 <code>
 > ansible-playbook test.yml | grep groups
"groups['cluster_1'][0]": "test01", 
"groups['cluster_2'][0]": "test06", 
"groups['cluster_3'][0]": "test09",

</code>
 </pre>
  
    在目标上执行任务
    <a href="https://docs.ansible.com/ansible/latest/modules/include_tasks_module.html" rel="nofollow noreferrer">
      include_tasks
    </A>
     （而不是在上面的循环中调试）和
    <a href="https://docs.ansible.com/ansible/latest/user_guide/playbooks_delegation.html#delegation" rel="nofollow noreferrer">
      delegate_to
    </A>
     目标
  
   <pre>
 <code>
 - set_fact:
 my_group: "cluster_{{ item }}"
- command: hostname
 delegate_to: "{{ groups[my_group][0] }}"

</code>
 </pre>
  
    注意：收集列表
    
      cluster_numbers
    
     从库存
  
   <pre>
 <code>
 cluster_numbers: "{{ hostvars|json_query('*.cluster_number')|unique }}"

</code>
 </pre>
</DIV>