实验7:基于REST API的SDN北向应用实践

一、实验环境

  1. 下载虚拟机软件Oracle VisualBox或VMware;
  2. 在虚拟机中安装Ubuntu 20.04 Desktop amd64,并完整安装Mininet、OpenDaylight(Carbon版本)、Postman和Ryu;

二、实验要求

1. OpenDaylight

(1) 利用Mininet平台搭建下图所示网络拓扑,并连接OpenDaylight

(2) 编写Python程序,调用OpenDaylight的北向接口下发指令删除s1上的流表数据

(3) 编写Python程序,调用OpenDaylight的北向接口下发硬超时流表,实现拓扑内主机h1和h3网络中断20s。

json:


(4) 编写Python程序,调用OpenDaylight的北向接口获取s1上活动的流表数。

2. Ryu

(1) 编写Python程序,调用Ryu的北向接口,实现上述OpenDaylight实验拓扑上相同的硬超时流表下发。

(2) 利用Mininet平台搭建下图所示网络拓扑,要求支持OpenFlow 1.3协议,主机名、交换机名以及端口对应正确。拓扑生成后需连接Ryu,且Ryu应能够提供REST API服务


(3) 整理一个Shell脚本,参考Ryu REST API的文档,利用curl命令,实现和实验2相同的VLAN命令行运行
shell脚本:

curl -X POST -d '{
  "dpid": 1,
  "priority": 1,
  "match":{
      "in_port": 1
  },
  "actions":[
      {
          "type": "PUSH_VLAN",     
          "ethertype": 33024       
      },
      {
          "type": "SET_FIELD",
          "field": "vlan_vid",    
          "value": 4096            
      },
      {
          "type": "OUTPUT",
          "port": 3
      }
  ]
}' http://localhost:8080/stats/flowentry/add
​
curl -X POST -d '{
  "dpid": 1,
  "priority": 1,
  "match":{
      "in_port": 2
  },
  "actions":[
      {
          "type": "PUSH_VLAN",    
          "ethertype": 33024      
      },
      {
          "type": "SET_FIELD",
          "field": "vlan_vid",     
          "value": 4097           
      },
      {
          "type": "OUTPUT",
          "port": 3
      }
  ]
}' http://localhost:8080/stats/flowentry/add
​
curl -X POST -d '{
  "dpid": 1,
  "priority": 1,
  "match":{
      "vlan_vid": 0
  },
  "actions":[
      {
          "type": "POP_VLAN",    
          "ethertype": 33024       
      },
      {
          "type": "OUTPUT",
          "port": 1
      }
  ]
}' http://localhost:8080/stats/flowentry/add
​
curl -X POST -d '{
  "dpid": 1,
  "priority": 1,
  "match":{
      "vlan_vid": 1
  },
  "actions":[
      {
          "type": "POP_VLAN",    
          "ethertype": 33024      
      },
      {
          "type": "OUTPUT",
          "port": 2
      }
  ]
}' http://localhost:8080/stats/flowentry/add
​
curl -X POST -d '{
  "dpid": 2,
  "priority": 1,
  "match":{
      "in_port": 1
  },
  "actions":[
      {
          "type": "PUSH_VLAN",    
          "ethertype": 33024      
      },
      {
          "type": "SET_FIELD",
          "field": "vlan_vid",    
          "value": 4096          
      },
      {
          "type": "OUTPUT",
          "port": 3
      }
  ]
}' http://localhost:8080/stats/flowentry/add
​
curl -X POST -d '{
  "dpid": 2,
  "priority": 1,
  "match":{
      "in_port": 2
  },
  "actions":[
      {
          "type": "PUSH_VLAN",    
          "ethertype": 33024      
      },
      {
          "type": "SET_FIELD",
          "field": "vlan_vid",   
          "value": 4097           
      },
      {
          "type": "OUTPUT",
          "port": 3
      }
  ]
}' http://localhost:8080/stats/flowentry/add
​
curl -X POST -d '{
  "dpid": 2,
  "priority": 1,
  "match":{
      "vlan_vid": 0
  },
  "actions":[
      {
          "type": "POP_VLAN",    
          "ethertype": 33024      
      },
      {
          "type": "OUTPUT",
          "port": 1
      }
  ]
}' http://localhost:8080/stats/flowentry/add
​
curl -X POST -d '{
  "dpid": 2,
  "priority": 1,
  "match":{
      "vlan_vid": 1
  },
  "actions":[
      {
          "type": "POP_VLAN",    
          "ethertype": 33024      
      },
      {
          "type": "OUTPUT",
          "port": 2
      }
  ]
}' http://localhost:8080/stats/flowentry/add

三、个人总结

这次实验相比原来的实验,难度提升了不止一个档次。有很多的代码要学习,还有一个又一个的新问题蹦出来。
但是在这次的实验过程中我学会了编写python代码来调用API,使用OpenDaylight和Ryu的REST API实现特定网络功能,了解了安装并且使用curl的命令,巩固了关于这两个控制器的使用方式并且对于这两个控制器的API使用有了新的认识。这对我之后的学习有很大的帮助

posted @ 2021-10-27 17:14  山田さんOfficial  阅读(35)  评论(0编辑  收藏  举报