第二天：网卡增删改插件

 

思路：网卡的唯一标识是mac地址，所以对比新旧用mac地址来进行比较

 

问题：mac地址如果被修改的话，就不能更新，只能添加新网卡，生产环境中肯定不能修改mac地址，

           但如何限制后台对mac地址的修改？

           models中能否做限制？

           不过好像只是测试的时候才改，生产环境根本不会从后台改数据

 

from repository import models

class Nic(object):

    def __init__(self,server_obj,info):
        self.server_obj = server_obj
        self.nic_dict = info


    def process(self):

        new_nic_info_dict = self.nic_dict['data']
        """
        {客户端发来的数据}
        """
        old_nic_info_list = self.server_obj.nic.all()
        """
        query_set[obj,obj,obj,]
        """


        # 取新旧两个集合
        new_nic_name_list = list(new_nic_info_dict.keys())

        new_nic_hwaddr_list = []
        for nic_name in new_nic_name_list:
            new_nic_hwaddr_list.append(new_nic_info_dict[nic_name]['hwaddr'])

        new_nic_dict_list = list(new_nic_info_dict.values())

        new_nic_hwaddr_set = set(new_nic_hwaddr_list)
        old_nic_hwaddr_set = {obj.hwaddr for obj in old_nic_info_list}

        # 得到增加删除更新的列表
        add_nic_hwaddr_set = new_nic_hwaddr_set.difference(old_nic_hwaddr_set)
        del_nic_hwaddr_set = old_nic_hwaddr_set.difference(new_nic_hwaddr_set)
        update_nic_hwaddr_set = old_nic_hwaddr_set.intersection(new_nic_hwaddr_set)


        record_list = []    # 变更日志列表

        # 增加
        for hwaddr in add_nic_hwaddr_set:
            for nic_dict in new_nic_dict_list:
                if nic_dict['hwaddr'] == hwaddr:
                    value = nic_dict
                    value['server_obj'] = self.server_obj
                    for new_nic_name in new_nic_name_list:
                        if new_nic_info_dict[new_nic_name] == nic_dict:
                            value['name'] = new_nic_name
                            models.NIC.objects.create(**value)
                            record = "[%s]增添网卡[%s]信息[%s]" %(self.server_obj,new_nic_name,value)
                            record_list.append(record)

        # 移除
        for nic_hwaddr in del_nic_hwaddr_set:
            del_nic_obj = models.NIC.objects.filter(server_obj=self.server_obj,hwaddr=nic_hwaddr).first()
            record = "[%s]移除网卡[%s]" %(self.server_obj,del_nic_obj.name)
            record_list.append(record)
            models.NIC.objects.filter(server_obj=self.server_obj,hwaddr=nic_hwaddr).delete()

        # 更新
        for nic_hwaddr in update_nic_hwaddr_set:
            for nic_dict in new_nic_dict_list:
                if nic_dict['hwaddr'] == nic_hwaddr:
                    value = nic_dict
            obj = models.NIC.objects.filter(server_obj=self.server_obj,hwaddr=nic_hwaddr).first()
            for k,new_val in value.items():
                old_val = getattr(obj,k)
                if old_val != new_val:
                    setattr(obj,k,new_val)
                    record = "[%s]网卡[%s][%s]更新为[%s]" %(self.server_obj,obj.name,old_val,new_val)
                    record_list.append(record)
            obj.save()


        if record_list:
             models.ServerRecord.objects.create(server_obj=self.server_obj,content=';\n'.join(record_list))

 

 

添加效果：

修改日志：

1、如果修改了mac地址，变更记录会错误

2、因为网卡以mac地址为唯一标识，所以不能修改mac地址

 

 

 

来自为知笔记(Wiz)