Puppet Exec 什么 "<||>"方法? [英] Puppet Exec what "<| |>" means?

问题描述

我正在学习木偶语言并注意到一行非常有趣的代码:Exec["apt-update"] ->包<||> 在以下上下文中:

I'm learning puppet language and noticed one very intriguing line of code: Exec["apt-update"] -> Package <| |> on following context:

class manifest::module {

  exec { "apt-update":
      command => "/usr/bin/apt-get -y update",
      timeout => 3600;
  }

  package {
    ["alien", "bc", "libaio1", "unixodbc", "unzip", "rlwrap"]:
      ensure => installed;
  }

  Exec["apt-update"] -> Package <| |>
}

为什么 Exec 后面跟着 ->?最重要的是，<| 的含义是什么?|> ???

Why Exec is followed by the ->? And most important, what's the meaning of <| |> ???

推荐答案

这个表达式本质上是指示 Puppet 让任何包资源都需要apt-update"exec 资源.换句话说，Puppet 一定会在安装/清除/...一个包之前执行 apt-get update.

This expression essentially instructs Puppet to have any package resource require the "apt-update" exec resource. In other words Puppet will be sure to execute apt-get update before installing/purging/... a package.

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