private void CollectImagePull()
 {
     lock (_lock)
     {
         if (MeasureHolder.ContainerType == ContainersType.D)
         {
             var dockerRegistry =
                 _machineTable.GetMachineById(int.MaxValue) as DockerRegistryMachine;
             MeasureHolder.PullsPerImage = dockerRegistry.GetPullsPerImage();
         }
     }
 }
        public void StartSimulation()
        {
            lock (_lock)
            {
                //NetworkSwitch.Started = true;
                foreach (var machine in MachineTable.GetAllMachines().Skip(1).Where(x => x.MachineId < int.MaxValue))
                {
                    DataHolder.SetUtilization(machine.MachineId, UtilizationStates.Normal);

                    machine.StartMachine();
                }
                MachineTable.GetMachineById(0).StartMachine();
                if (ContainerTypes == ContainersType.D)
                {
                    MachineTable.GetMachineById(int.MaxValue).StartMachine();
                }
            }
        }
        //public int GetMachinesCount()
        //{
        //    lock (_lock)
        //    {
        //        return MachineTable.GetMachinesCount();
        //    }
        //}

        public void PowerOffHost(int machineId)
        {
            lock (_lock)
            {
                var machine = MachineTable.GetMachineById(machineId);
                if ((machine as HostMachine).GetContainersCount() != 0)
                {
                    //return false;
                    throw new NotImplementedException();
                }
                else
                {
                    machine.StopMachine();
                    //PoweredOffMachinesTable.AddMachine(machine.MachineId, machine);
                    MachineTable.RemoveMachine(machineId);
                    DataHolder.RemoveUtilization(machineId);
                    ReadyMachineTable.AddMachine(machineId, machine);
                    //Console.WriteLine($"( ) Power off Host #{machineId}");

                    //return true;
                }
            }
        }