volume.py 文件源码

def create_from_snapshot(self, name, snapshot, size=None):
        if size < self.size:
            size = self.size
        ec2 = self.get_ec2_connection()
        if self.zone_name == None or self.zone_name == '':
            # deal with the migration case where the zone is not set in the logical volume:
            current_volume = ec2.get_all_volumes([self.volume_id])[0]
            self.zone_name = current_volume.zone
        ebs_volume = ec2.create_volume(size, self.zone_name, snapshot)
        v = Volume()
        v.ec2 = self.ec2
        v.volume_id = ebs_volume.id
        v.name = name
        v.mount_point = self.mount_point
        v.device = self.device
        v.region_name = self.region_name
        v.zone_name = self.zone_name
        v.put()
        return v