”發佈”要製作的功能

按下"發佈"會執行的動作：

(1) create new os snapshot
(2) tell target to create vmdk of new os verion
(3.1) if target create success , update db data accord to (1)
(3.2) if target creat failed, delete (1) create record
(3.1.1) follow (3.1) success :
create psd lun and snapshot with every pc and user that relate with be published os
(3.1.2) tell target to create PSD vmdk
(3.1.3.1) if target create success, do nothing
(3.1.3.2) if target create failed, delete (3.1.1) create record