Ruby VMWare VSphere API Example 1 (rbvmomi)

rbvmomi_example1.rb

require 'rubygems'
require 'rbvmomi'
require 'pp'
require 'alchemist'

hyper = 'thunder03'
vim = RbVmomi::VIM.connect :host => hyper, :user => 'root', :password => 'secret', :insecure => true

#
# get current time
#
vim.serviceInstance.CurrentTime

#
# get datacenter
#
# http://www.vmware.com/support/developer/vc-sdk/visdk400pubs/ReferenceGuide/vim.Datacenter.html
dc = vim.serviceInstance.find_datacenter

# get host object
# http://www.vmware.com/support/developer/vc-sdk/visdk400pubs/ReferenceGuide/vim.HostSystem.html
host = dc.hostFolder.children.first.host.first

# 
# http://www.vmware.com/support/developer/vc-sdk/visdk400pubs/ReferenceGuide/vim.host.HardwareInfo.html
# 
# host.hardware
#
puts host.hardware.memorySize.bytes.to.megabytes
puts host.hardware.cpuInfo.numCpuCores

#
# http://www.vmware.com/support/developer/vc-sdk/visdk400pubs/ReferenceGuide/vim.host.RuntimeInfo.html
#
puts host.summary.runtime.powerState

#
# http://www.vmware.com/support/developer/vc-sdk/visdk400pubs/ReferenceGuide/vim.host.Summary.QuickStats.html
# http://www.vmware.com/support/developer/vc-sdk/visdk400pubs/ReferenceGuide/vim.host.Summary.html
puts host.summary.quickStats.overallMemoryUsage.megabytes
puts host.summary.quickStats.overallCpuUsage
puts host.summary.config.name

# 
# Product Info
#
# http://www.vmware.com/support/developer/vc-sdk/visdk400pubs/ReferenceGuide/vim.AboutInfo.html
#
puts host.summary.config.product.fullName
puts host.summary.config.product.apiType
puts host.summary.config.product.apiVersion
puts host.summary.config.product.osType
puts host.summary.config.product.productLineId
puts host.summary.config.product.vendor
puts host.summary.config.product.version

# List all VM 
# http://www.vmware.com/support/developer/vc-sdk/visdk400pubs/ReferenceGuide/vim.VirtualMachine.html
vm = dc.vmFolder.childEntity.grep(RbVmomi::VIM::VirtualMachine).find do |x| 
  puts x.name
  puts x.summary.config.memorySizeMB
  puts x.summary.config.numCpu
  puts x.summary.config.numEthernetCards
  puts x.summary.config.numVirtualDisks
end

host = dc.hostFolder.children.first.host.first gives
NoMethodError: undefined method `first' for #RbVmomi::VIM::Folder:0x0000562d6b2f6388