Shutdown and destroy all VMs in a resource pool

shutdown_vms_in_rp.rb

#!/usr/bin/env ruby

require 'rbvmomi'

vcenter_host = ARGV[0]
username = ARGV[1]
password = ARGV[2]
dc_name = ARGV[3]
rp_name = ARGV[4]

def vms(folder, resource_pool) # recursively go thru a folder, dumping vm info
   folder.childEntity.each do |x|
      ent_class = x.class

      vms x, resource_pool if x.class == RbVmomi::VIM::Folder
      if x.class == RbVmomi::VIM::VirtualMachine
        next if x.resourcePool.nil?

        if x.resourcePool.name == resource_pool && (x.name[0..1] == "vm" || x.name[0..1] == "sc")
          puts "Shutting down #{x.name}"

          begin
           x.PowerOffVM_Task.wait_for_completion
          rescue RbVmomi::Fault # maybe the vm is already shutdown
          end

          x.Destroy_Task.wait_for_completion
        end
      end
   end
end

vim = RbVmomi::VIM.connect host: vcenter_host, user: username, password: password, insecure: true
rootFolder = vim.serviceInstance.content.rootFolder

dc = vim.serviceInstance.find_datacenter(dc_name)
vms dc.vmFolder, rp_name