Compiles the CPU, RAM, and Disk usage of our Pivotal Cloud environments

cf_env_resources.rb

#!/usr/bin/env ruby

require 'rbvmomi'

def vCenter_session
  # host is a vCenter, not an ESXi host
  RbVmomi::VIM.connect host: ENV['VCENTER_HOST'], user: 'root', password: ENV['VCENTER_PASSWORD']
end

def find_datacenter(datacenter_name)
  vCenter_session.serviceInstance.find_datacenter(datacenter_name)
end

def find_cluster(datacenter)
  datacenter.hostFolder.children
end

def find_resource_pools(clusters)
  resource_pools = []
  clusters.each do |cluster|
    resource_pools.push(cluster.resourcePool.resourcePool)
  end
  resource_pools.flatten
end


def non_empty_resource_pools(resource_pools)
  resource_pools.select { |rp| !rp.vm.empty? }
end

# def get_vm_info(vm)
#   memory = vm.summary.config.memorySize
#   num_cpu = vm.summary.config.numCpu
#   hd_size = vm.summary.storage.committed
# end

datacenter = find_datacenter("private")

clusters = find_cluster(datacenter)

resource_pools = find_resource_pools(clusters)

# resource_pools.each do |rp|
#   puts rp.name
# end

def to_kb(kib)
  kib / 1024.0 * 1000
end
non_empty_resource_pools = resource_pools.select { |rp| !rp.vm.empty? }

#print "RESOURCE_POOL,INSTANCE_NAME,MEMORY,DISK_COUNT,DISKS,TOTAL\n"
print "Resource Pool Disk (GB) RAM (GiB) VMs\n"

non_empty_resource_pools.each do |rp|
  total_rp_vms = 0
  total_rp_disk = 0
  total_rp_ram = 0
#  print rp.name + "\n"
  rp.vm.each do |vm|
    #print rp.name + "," + vm.name + "," + vm.summary.config.memorySizeMB.to_s + "," + vm.disks.count.to_s + ","
    last_disk = vm.disks[-1]
    total_disk=0
    vm.disks.each do |disk|
      # convert kiB to kB
      total_disk=total_disk+to_kb(disk.capacityInKB)
      unless disk == last_disk
	#print (disk.capacityInKB/1024).to_s + "+"
      else
        #print (disk.capacityInKB/1024).to_s
      end
    end
    total_rp_vms += 1
    total_rp_ram += vm.summary.config.memorySizeMB
    total_rp_disk += total_disk
    #print ", #{total_disk}\n"
  end
  print "#{ '%-13s' % rp.name } #{ '%9d' % (total_rp_disk/1000000) } #{ '%9d' % (total_rp_ram/1024)} #{'%3d' % total_rp_vms}\n"
end