ruby fog vsphere 输出列表 proc 对象

Question

我正在尝试 ruby​​ fog vsphere 示例:

#!/usr/bin/env ruby

require 'rubygems'
require 'pp'
require 'fog'
require 'highline/import'

def get_password(prompt="Enter password:")
   ask(prompt) {|q| q.echo = false}
end

#user = gets.chomp
pass = get_password()

credentials = {
    :provider   => "vsphere",
    :vsphere_username   => "user.name",
    :vsphere_password   => pass,
    :vsphere_server => "my_vcserver",
    :vsphere_ssl    => true,
    :vsphere_expected_pubkey_hash   => "my_hash",
    :vsphere_rev    => "4.0"
}
connection = Fog::Compute.new(credentials)

# MUST BE Ruby v 1.9 to use this hash style
vms = connection.list_virtual_machines(datacenter: 'my_dc', folder: 'my_folder')
pp vms

它连接并报告回数据，但有几个属性没有显示正确的数据，而是显示看起来像 Proc 对象的内容。我对 mac_addresses 属性感兴趣。我如何从该对象中获取数据？

{"id"=>"52e9592f-4da9-c5b4-a78e-92d39705d900",
  "name"=>"a41",
  "uuid"=>"784d4e21-e4a7-e059-cdef-4ff1453f093d",
  "template"=>false,
  "parent"=>Folder("group-v16163"),
  "hostname"=>nil,
  "operatingsystem"=>nil,
  "ipaddress"=>nil,
  "power_state"=>"poweredOn",
  "connection_state"=>"connected",
  "hypervisor"=>
   #<Proc:0x00000004922d50@/opt/rh/ruby193/root/usr/local/share/gems/gems/fog-1.22.0/lib/fog/vsphere/compute.rb:150>,
  "tools_state"=>"toolsNotInstalled",
  "tools_version"=>"guestToolsNotInstalled",
  "memory_mb"=>8192,
  "cpus"=>2,
  "corespersocket"=>2,
  "overall_status"=>"green",
  "guest_id"=>"centos64Guest",
  "mo_ref"=>"vm-16217",
  "datacenter"=>
   #<Proc:0x00000004922fa8@/opt/rh/ruby193/root/usr/local/share/gems/gems/fog-1.22.0/lib/fog/vsphere/compute.rb:148>,
  "cluster"=>
   #<Proc:0x00000004922e68@/opt/rh/ruby193/root/usr/local/share/gems/gems/fog-1.22.0/lib/fog/vsphere/compute.rb:149>,
  "resource_pool"=>
   #<Proc:0x00000004922c60@/opt/rh/ruby193/root/usr/local/share/gems/gems/fog-1.22.0/lib/fog/vsphere/compute.rb:151>,
  "mac_addresses"=>
   #<Proc:0x00000004922b48@/opt/rh/ruby193/root/usr/local/share/gems/gems/fog-1.22.0/lib/fog/vsphere/compute.rb:155>,
  "path"=>"/Datacenters/DEV/vm",
  "relative_path"=>"DEV"}

Answer 1

您可以简单地调用 proc 来检索数据:

my_data['mac_addresses'].()

如果此时 fog 能够收集到数据，它将返回 mac 地址，否则将返回 nil。 Foq 使用这种技术延迟评估某些属性，这些属性在哈希的编译期间可能不可用，但需要额外调用 vsphere 管理程序。

引用来自 respective source file 的评论:

Here we create the hash object that this method returns, but first we need to add a few more attributes that require additional calls to the vSphere API. The hypervisor name and mac_addresses attributes may not be available so we need catch any exceptions thrown during lookup and set them to nil.