example vm

vm.py

class VM(object):
    def __init__(self, uuid, name, status):
        self.uuid = uuid
        self.name = name
        self.status = status

    def __repr__(self):
        return '%s - %s (%s)' % (self.uuid, self.name, self.status)

    def export(self, directory_name=None):
        start = time.time()
        timestamp = time.strftime("%Y-%m-%d_%H-%M-%S", time.gmtime())

        file_name = 'backup-%s--%s.xva' % (timestamp, self.name)
        if directory_name is not None:
            file_name = os.path.join(directory_name, file_name)

        # create a snapshot
        snapshot_uuid = check_output(['xe', 'vm-snapshot', 'uuid=' + self.uuid,
                                      'new-name-label=backup-' + self.name]).strip()

        logging.info('xe vm-snapshot uuid=%s new-name-label=backup-' %  (self.uuid)  + self.name +  '...OK')
        # change some params so that the snapshot can be exported
        cmd = "xe template-param-set is-a-template=false ha-always-run=false uuid=" + snapshot_uuid
        check_output(cmd, shell=True)

        logging.info(cmd + '...OK')

        # export snapshot
        cmd = 'xe vm-export vm=%s filename="%s" compress=true' % (snapshot_uuid, file_name)
        check_output(['xe', 'vm-export', 'vm=' + snapshot_uuid,
                         'filename=' + file_name, 'compress=true'])
	logging.info(cmd + '...OK')

        # remove old snapshot again
        cmd = "xe vm-uninstall uuid=%s force=true" % snapshot_uuid
        check_output(cmd, shell=True)
        logging.info(cmd + '...OK')
        logging.info('Exported VM "%s" in %s seconds.' % (self.name, time.time() - start))