PROSAGA码农传奇-puppet/Hiera-在Hiera内部做基本数学

在Hiera内部做基本数学

作者: 布偶的表弟派大星丶
发布时间: 2024-11-14 07:42:16 (3天前)
转自：

<div class =“post-text”itemprop =“text”>
  
    我不确定我是否遵循用例，但你可能会使用它
     <code>
 inline_epp
 </code>
     要么
     <code>
 inline_template
 </code>
     使它看起来像这个功能存在。
  
  
    例如：
  
   <pre class="lang-ruby prettyprint-override">
 <code>
 # In real usage this would be the result of a hiera lookup
$simple_lookup_result = '9 % 7'
$simple_evaluated = inline_template("<%= ${simple_lookup_result} %>")

exec { 'simple':
  command => "/bin/echo $simple_evaluated",
  logoutput => true,
}

# Again, hiera...
$complex_lookup_result = 'sprintf("The value is %i", 9 % 7)'
$complex_evaluated = inline_template("<%= ${complex_lookup_result} %>")

exec { 'complex':
  command => "/bin/echo $complex_evaluated",
  logoutput => true,
}

</code>
 </pre>
  
    结果如下：
  
   <pre>
 <code>
 $ puppet apply eval.pp 
Notice: Compiled catalog for box in environment production in 0.06 seconds
Notice: /Stage[main]/Main/Exec[simple]/returns: 2
Notice: /Stage[main]/Main/Exec[simple]/returns: executed successfully
Notice: /Stage[main]/Main/Exec[complex]/returns: The value is 2
Notice: /Stage[main]/Main/Exec[complex]/returns: executed successfully
Notice: Applied catalog in 0.05 seconds

</code>
 </pre>
  
    请记住，Hiera可以进行插值
    <a href="https://puppet.com/docs/puppet/5.5/hiera_merging.html#interpolate-a-puppet-variable" rel="nofollow noreferrer">
      变量
    </A>
     要么
    <a href="https://puppet.com/docs/puppet/5.5/hiera_merging.html#the-lookup-and-hiera-function" rel="nofollow noreferrer">
      Hiera查找
    </A>
    ，查找也可以在代码中完成
     <code>
 inline_epp
 </code>
     要么
     <code>
 inline_template
 </code>
     最终会评估。
  
  
    的
      注：这是一个示例，除非您信任您的用户并且非常喜欢头痛，否则您不应将Hiera输入传递给shell命令。
    </强>
  
</DIV>