OpenNebula

        vcenter_version = @vi_client.vim.serviceContent.about.apiVersion rescue nil

        if vcenter_version != "5.5"

            begin

                @item.CreateSnapshot_Task(snapshot_hash).wait_for_completion

            rescue Exception => e

                raise "Cannot create snapshot for VM: #{e.message}\n#{e.backtrace}"

            end

        else

            # B#5045 - If vcenter is 5.5 the snapshot may take longer than

            # 15 minutes and it does not report that it has finished using

            # wait_for_completion we use an active wait instead with a

            # timeout of 1440 minutes = 24 hours

            @item.CreateSnapshot_Task(snapshot_hash)

            snapshot_created  = false

            elapsed_minutes   = 0

            until snapshot_created || elapsed_minutes == 1440

                if !!@item['snapshot']

                    current_snapshot = @item['snapshot.currentSnapshot'] rescue nil

                    snapshot_found = find_snapshot(@item['snapshot.rootSnapshotList'], snapshot_name)

                    snapshot_created = !!snapshot_found && !!current_snapshot && current_snapshot._ref == snapshot_found._ref

                end

                sleep(60)

                elapsed_minutes += 1

            end