Puppet :使用facter滤镜获取挂载点

Question

我正在尝试使用Puppet facter获取根分区(mountpoint => "/")名称。当我运行"facter mountpoints"时，它显示多个分区。我想从结果中获得变量"/dev/md3"。

{
  / => {
    available => "893.71 GiB",
    available_bytes => 959608590336,
    capacity => "1.86%",
    device => "/dev/md3",
    filesystem => "ext4",
    options => [
      "rw",
      "errors=remount-ro"
    ],
    size => "910.69 GiB",
    size_bytes => 977843884032,
    used => "16.98 GiB",
    used_bytes => 18235293696
  },
  /run => {
    available => "794.91 MiB",
    available_bytes => 833527808,
    capacity => "0.07%",
    device => "tmpfs",
    filesystem => "tmpfs",
    options => [
      "rw",
      "noexec",
      "nosuid",
      "size=10%",
      "mode=0755"
    ],
    size => "795.48 MiB",
    size_bytes => 834125824,
    used => "584.00 KiB",
    used_bytes => 598016
  },
  /tmp => {
    available => "1.78 GiB",
    available_bytes => 1909157888,
    capacity => "1.21%",
    device => "/dev/md1",
    filesystem => "ext4",
    options => [
      "rw"
    ],
    size => "1.80 GiB",
    size_bytes => 1932533760,
    used => "22.29 MiB",
    used_bytes => 23375872
  }
}

我尝试使用过滤器，但我无法过滤"/"设备。$root_mount = $facts['mountpoints'].filter |$mountpoint| { $mountpoint == '/' }你们知道吗？

Answer 1

您可以通过哈希表示法直接访问此事实。由于您的问题很大程度上暗示您正在使用Facter 3/Puppet 4，因此我将使用该语法。

您只需直接遍历Facter散列中的键，即可得到/dev/md3值。如果我们最小化从facter mountpoints到相关部分的散列

{
  / => {
    device => "/dev/md3"
  }
}

然后，我们看到密钥是mountpoints (当您从命令行界面执行facter mountpoints操作时直接访问该密钥)、/和device。因此，在Puppet中使用标准散列符号和$facts散列，我们可以通过以下方式访问该值：

$facts['mountpoints']['/']['device'] # /dev/md3

点击此处了解更多信息：https://docs.puppet.com/puppet/4.9/lang_facts_and_builtin_vars.html#the-factsfactname-hash