标签：http self vlan REST headers API SDN type port
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；
./distribution-karaf-0.6.4-Carbon/bin/karaf sudo mn --topo=single,3 --controller=remote,ip=127.0.0.1,port=6633 --switch ovsk,protocols=OpenFlow13 pingall
（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。
#delete.py import requests from requests.auth import HTTPBasicAuthif 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。
# delay.py
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('delay.json') as f:
jstr = f.read()
resp = http_put(url,jstr)
print (resp.content)
# delay.json
{ //json
"flow": [
{
"id": "1",
"match": {
"in-port": "1",
"ethernet-match": {
"ethernet-type": {
"type": "0x0800"
}
},
"ipv4-destination": "10.0.0.3/32"
},
"instructions": {
"instruction": [
{
"order": "0",
"apply-actions": {
"action": [
{
"order": "0",
"drop-action": {}
} ] } } ]
},
"flow-name": "flow1",
"priority": "65535",
"hard-timeout": "20",
"cookie": "2",
"table_id": "0"
} ] }
（4） 编写Python程序，调用OpenDaylight的北向接口获取s1上活动的流表数。
#getflow.py import requests from requests.auth import HTTPBasicAuthif 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)
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。
import requestsif name == "main":
url = 'http://127.0.0.1:8080/stats/flowentry/add'
with open("./RyuDelay.json") as f:
jstr = f.read()
headers = {'Content-Type': 'application/json'}
res = requests.post(url, jstr, headers=headers)
print (res.content)
{
"dpid": 1,
"cookie": 1,
"cookie_mask": 1,
"table_id": 0,
"hard_timeout": 20,
"priority": 65535,
"flags": 1,
"match":{
"in_port":1
},
"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。
#topo.py from mininet.topo import Topoclass MyTopo(Topo):
def init(self):
# initilaize topology
Topo.init(self)self.addSwitch(</span><span style="color: #800000;">"</span><span style="color: #800000;">s1</span><span style="color: #800000;">"</span><span style="color: #000000;">) self.addSwitch(</span><span style="color: #800000;">"</span><span style="color: #800000;">s2</span><span style="color: #800000;">"</span><span style="color: #000000;">) self.addHost(</span><span style="color: #800000;">"</span><span style="color: #800000;">h1</span><span style="color: #800000;">"</span><span style="color: #000000;">) self.addHost(</span><span style="color: #800000;">"</span><span style="color: #800000;">h2</span><span style="color: #800000;">"</span><span style="color: #000000;">) self.addHost(</span><span style="color: #800000;">"</span><span style="color: #800000;">h3</span><span style="color: #800000;">"</span><span style="color: #000000;">) self.addHost(</span><span style="color: #800000;">"</span><span style="color: #800000;">h4</span><span style="color: #800000;">"</span><span style="color: #000000;">) self.addLink(</span><span style="color: #800000;">"</span><span style="color: #800000;">s1</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">h1</span><span style="color: #800000;">"</span><span style="color: #000000;">) self.addLink(</span><span style="color: #800000;">"</span><span style="color: #800000;">s1</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">h2</span><span style="color: #800000;">"</span><span style="color: #000000;">) self.addLink(</span><span style="color: #800000;">"</span><span style="color: #800000;">s2</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">h3</span><span style="color: #800000;">"</span><span style="color: #000000;">) self.addLink(</span><span style="color: #800000;">"</span><span style="color: #800000;">s2</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">h4</span><span style="color: #800000;">"</span><span style="color: #000000;">) self.addLink(</span><span style="color: #800000;">"</span><span style="color: #800000;">s1</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">s2</span><span style="color: #800000;">"</span><span style="color: #000000;">)topos = {'mytopo': (lambda: MyTopo())}
（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。
# vlan.py
# 将主机1，2发送来的数据包打上vlan标记
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
# 将主机3，4发送来的数据包取出vlan标记
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
# 将主机3，4发送来的数据包打上vlan标记
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
四.个人总结
这次实验耗时较长，解决了上次实验中没能完成的ryu安装问题，也学会了如何用终端口令直接创造py文件，以及使用终端下发流表，让我对ODL的操作以及ryu的操作都有了进一步深刻的理解。另外我发现建立拓扑后立刻执行pingall指令会出现无法连接的问题，但是稍等片刻或重新搭建拓扑后问题得以解决。
标签：http,self,vlan,REST,headers,API,SDN,type,port 来源： https://www.cnblogs.com/jjjcjazrr/p/15471325.html
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