第7次上机作业

实验7:基于REST API的SDN北向应用实践

一、实验目的

  1. 能够编写程序调用OpenDaylight REST API实现特定网络功能;
  2. 能够编写程序调用Ryu REST API实现特定网络功能。

二、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;

三、实验要求

(一)基本要求

    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。
      import requests
      from requests.auth import HTTPBasicAuth
      if __name__ == "__main__":
          url = 'http://127.0.0.1:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/'
          headers = {'Content-Type': 'application/json'}
          res = requests.delete(url, headers=headers, auth=HTTPBasicAuth('admin', 'admin'))
          print (res.content) 
      
      (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。
      点击查看代码
      import requests
      from requests.auth import HTTPBasicAuth
      
      if __name__ == "__main__":
          url = 'http://127.0.0.1:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/1'
          with open("./flowtable.json") as f:
              jstr = f.read()
          headers = {'Content-Type': 'application/json'}
          res = requests.put(url, jstr, headers=headers, auth=HTTPBasicAuth('admin', 'admin'))
          print (res.content)
      
      (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. 点击查看代码
      import requests
      from requests.auth import HTTPBasicAuth
      
      if __name__ == "__main__":
          url = 'http://127.0.0.1:8181/restconf/operational/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/opendaylight-flow-table-statistics:flow-table-statistics'
          headers = {'Content-Type': 'application/json'}
          res = requests.get(url,headers=headers, auth=HTTPBasicAuth('admin', 'admin'))
          print (res.content)
      
    3. 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。
      点击查看代码
      import requests
      from requests.auth import HTTPBasicAuth
      def http_post(url,jstr):
          url= url
          headers = {'Content-Type':'application/json'}
          resp = requests.post(url,jstr,headers=headers)
          return resp
      
      
      if __name__ == "__main__":
          url='http://127.0.0.1:8080/stats/flowentry/add'
          with open('flowtable2.json') as f:
              jstr = f.read()
          resp = http_post(url,jstr)
          print (resp.content)
      
      (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。

      ![](https://img2020.cnblogs.com/blog/2524877/202110/2524877-20211026170618868-753552396.png)
posted @ 2021-10-26 16:13  李彦君  阅读(33)  评论(0)    收藏  举报