如何找到厨师食谱中可用的磁盘？ [英] How can I find the disk available in a Chef recipe?

问题描述

在执行Chef配方时，我想确定是否有足够的可用磁盘空间来执行操作。

While a Chef recipe is executing, I want to determine if there is sufficient free disk space available to perform an operation.

如何做到最好？

推荐答案

Ohai 每次运行时都会检测到aa节点的某些属性。这些属性被捕获为自动属性，并且可以作为节点属性使用。

Ohai detects certain properties of a a node each time it is run. These properties are captured as automatic attributes and are available to you as node attributes.

属性节点['filesystem']包含有关系统上每个设备的信息。要获取特定设备的可用空间（以kb为单位），

The attribute node['filesystem'] contains information about each of the devices on your system. To get the space available in kb, for a specific device:

node['filesystem']['/dev/xvda1']['kb_available']

以下是来自Ohai的文件系统属性JSON的示例：

The following is an example of the filesystem attribute JSON from Ohai:

   "filesystem": {
  "/dev/xvda1": {
    "kb_size": "521882300",
    "kb_used": "119914572",
    "kb_available": "375474240",
    "percent_used": "25%",
    "mount": "/",
    "fs_type": "ext4",
    "mount_options": [
      "rw"
    ],
    "uuid": "248b8180-f75f-48fc-a8be-e3ff3506c4d6"
  },
  "tmpfs": {
    "kb_size": "1987292",
    "kb_used": "0",
    "kb_available": "1987292",
    "percent_used": "0%",
    "mount": "/dev/shm",
    "fs_type": "tmpfs",
    "mount_options": [
      "rw",
      "rootcontext=\"system_u:object_r:tmpfs_t:s0\""
    ]
  }
}

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