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，它会显示多个分区。我想从结果中获取变量"/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 == '/' }你们有什么想法吗？

Answer 1

您可以通过哈希表示法直接访问此事实。由于你的问题很大程度上暗示你正在使用Facter 3 / Puppet 4，我将使用这种语法。

您只需直接遍历Facter哈希中的键即可获得/dev/md3值。如果我们将哈希值从facter mountpoints最小化到相关部分：

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

然后我们看到密钥是mountpoints（您在CLI中facter mountpoints时直接访问了该密钥），/和device。因此，在Puppet中使用带有$facts哈希的标准哈希表示法，我们可以使用以下命令访问该值：

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

点击此处了解详情：https://docs.puppet.com/puppet/4.9/lang_facts_and_builtin_vars.html#the-factsfactname-hash

Puppet：使用facter过滤器获取mountpoint

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