Hi, Guys I am studying ovirt, and now I am checking how vdsm manage VM. But now I have a trouble about the process "shutdown VM". I know that when start up a VM, a vm object will be added to the vmContainer. And I think the vm object will be deleted from vmContainer when shutdown/poweroff since the code will check whether the vm object exist in vmContainer when start up VM. --------------------------------- # cat vdsm/API.py def create(self, vmParams): """ Start up a virtual machine. :param vmParams: required and optional VM parameters. :type vmParams: dict """ vmParams['vmId'] = self._UUID try: if vmParams.get('vmId') in self._cif.vmContainer: self.log.warning('vm %s already exists' % vmParams['vmId']) return errCode['exist'] ... snip ... --------------------------------- I found the vm object will be deleted from vmContainer when poweroff. but I did not find where vm obeject be deleted from vmContainer when shutdown. Does someone can help me? --------------------------------- # cat vdsm/virt/vm.py def destroy(self): self.log.debug('destroy Called') response = self.doDestroy() if response['status']['code']: return response # Clean VM from the system self.deleteVm() ... snip ... def deleteVm(self): """ Clean VM from the system """ try: del self.cif.vmContainer[self.conf['vmId']] self.log.debug("Total desktops after destroy of %s is %d", self.conf['vmId'], len(self.cif.vmContainer)) except Exception: self.log.error("Failed to delete VM %s", self.conf['vmId'], exc_info=True) ... snip ... --------------------------------- Regards, Jian -- -------------------------------------------------- Zhang Jian Development Dept.I Nanjing Fujitsu Nanda Software Tech. Co., Ltd.(FNST) No.6 Wenzhu Road, Nanjing, 210012, China TEL: +86+25-86630566-8526 FUJITSU INTERNAL: 7998-8526 FAX: +86+25-83317685 MAIL: zhangjian2011@cn.fujitsu.com --------------------------------------------------