Class: CCBuilder::ONEClient

Inherits:
Object
  • Object
show all
Defined in:
lib/ONEClient.rb

Defined Under Namespace

Classes: Error

Instance Method Summary collapse

Constructor Details

#initialize(verbose = false) ⇒ ONEClient

Returns a new instance of ONEClient.



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# File 'lib/ONEClient.rb', line 15

def initialize(verbose = false)
  @verbose = verbose
  @one_client = OpenNebula::Client.new(nil)
rescue OpenNebula::Error => e
  raise Error.new("OpenNebula: #{e.message}")
end

Instance Method Details

#create(one_vm_descriptor, n = 1) ⇒ Object

API-method create



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# File 'lib/ONEClient.rb', line 23

def create(one_vm_descriptor, n = 1)
  n.times do |i|
    create_single(one_vm_descriptor)
    puts "created VM #i" if @verbose
  end
end

#create_single(one_vm_descriptor) ⇒ Object 



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# File 'lib/ONEClient.rb', line 30

def create_single(one_vm_descriptor)
  vm = OpenNebula::VirtualMachine.new(OpenNebula::VirtualMachine.build_xml, @one_client)
  template=File.read(one_vm_descriptor)
 vm.allocate(template)
rescue
  raise Error.new("OpenNebula: Can not read template: #{one_vm_descriptor}")
end

#delete(id_low, id_high = 0) ⇒ Object

API-method delete



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# File 'lib/ONEClient.rb', line 75

def delete(id_low, id_high = 0)
  id_high = id_low if id_high < id_low
  Range.new(id_low,id_high).each do |id|
    delete_single(id)
    puts "deleted VM #{id}" if @verbose
  end
end

#delete_single(id) ⇒ Object 



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# File 'lib/ONEClient.rb', line 83

def delete_single(id)
  vm = OpenNebula::VirtualMachine.new_with_id(id, @one_client)
  vm.finalize
rescue OpenNebula::Error => e
  raise Error.new("OpenNebula: #{e.message}")
end

#list ⇒ Object

API-method list



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# File 'lib/ONEClient.rb', line 39

def list
  n = 3
  vmpool = OpenNebula::VirtualMachinePool.new(@one_client, -1)
  result = vmpool.info
  vms = Array.new 
  queue = Queue.new # queue to hold ids which need to be looked up
  threads = Array.new
  n.times do |i| # Launch n threads which do the lookups#        
    threads[i] = Thread.new do 
      id = queue.pop
      until id == 0
        vm = OpenNebula::VirtualMachine.new_with_id(id, @one_client)
        vm.info
        ip = vm.template_str.scan(/IP=(\d+\.\d+\.\d+\.\d+),/)[0][0]
        status = vm.status
        vmhost = vm["HISTORY/HOSTNAME"]
        host = Resolv::getname(ip)
        Thread.pass
        puts "VM ##{id} with ip #{ip} resolved to name #{host}" if @verbose
        vms << { 'id' => id, 'ip' => ip, 'host' => host, 'status' => status, 'vmhost' => vmhost }
        STDOUT.flush
        id = queue.pop
      end 
    end
  end
  vmpool.map do |vm|
    queue << vm.id
  end
  n.times { queue << 0 } # send 0 to terminate threads 
  n.times { |i| threads[i].join } # wait until threads finished
  return vms
ensure
  n.times { |i| threads[i].terminate } 
end