SDN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

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
def http_delete(url):
url= url
headers = {'Content-Type':'application/json'}
resp = requests.delete(url,headers=headers,auth=HTTPBasicAuth('admin', 'admin'))
return resp
if name == "main":
url='http:// 127.0.0.1:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/'
resp = http_delete(url)
print (resp.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。

import requests
from requests.auth import HTTPBasicAuth
def http_put(url,jstr):
url= url
headers = {'Content-Type':'application/json'}
resp = requests.put(url,jstr,headers=headers,auth=HTTPBasicAuth('admin', 'admin'))
return resp
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('206.json') as f:
jstr = f.read()
resp = http_put(url,jstr)
print (resp.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。

import requests
import json
from requests.auth import HTTPBasicAuth
def http_get(url):
url= url
headers = {'Content-Type':'application/json'}
resp = requests.get(url,headers=headers,auth=HTTPBasicAuth('admin','admin'))
return resp
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'
with open('206.json') as f:
jstr = f.read()
resp = http_get(url)
print(resp.content)

2.Rryu

(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。

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('ryutest.json') as f:
jstr = f.read()
resp = http_post(url,jstr)
print (resp.content)
{
"dpid": 1,
"match": {
"in-port": "1",
"dl_dst": "00:00:00:00:00:01"
},
"priority": 65535,
"hard_timeout": 20,
"cookie": "2",
"table_id": 0,
"actions": []
}

(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。




四、个人实验总结

这一次的实验相对来说难上了不少,我自己并没能很好的完成,在同学的指导下才勉强做完了本次作业,python的编写给我带来了不少的麻烦,我也借鉴了同学的部分思路,这一次的作业给我带来了很多的思考与警醒,在接下来的课程当中我有着很多需要注意与提升的地方。

posted @ 2021-10-26 00:37  近远无痕  阅读(33)  评论(0编辑  收藏  举报