SDN期末作业
SDN期末作业 一、项目描述 负载均衡程序 二、个人分工 代码实现：林俊辰、黄逸飞 文档收集：郭圳源 视频拍摄：叶文滔 三、代码演示及过程描述
from mininet.topo import Topo
class MyTopo( Topo ):
"Simple topology example."
def __init__( self ):
# Initialize topology
Topo.__init__( self )
sw1 = self.addSwitch(\'s1\')
sw2 = self.addSwitch(\'s2\')
sw3 = self.addSwitch(\'s3\')
sw4 = self.addSwitch(\'s4\')
h1 = self.addHost(\'h1\')
h2 = self.addHost(\'h2\')
h3 = self.addHost(\'h3\')
h4 = self.addHost(\'h4\')
self.addLink(h1,sw1,1)
self.addLink(sw1,sw2,2,1)
self.addLink(sw1,sw4,3,2)
self.addLink(sw1,sw3,4,1)
self.addLink(sw2,sw4,2,1)
self.addLink(sw3,sw4,2,3)
self.addLink(sw4,h2,4)
self.addLink(sw4,h3,5)
self.addLink(sw4,h4,6)
topos = { \'mytopo\': ( lambda: MyTopo() ) }
//拓扑
import httplib2
import time
class OdlUtil:
url = \'\'
def __init__(self, host, port):
self.url = \'http://\' + host + \':\' + str(port)
def install_flow(self, container_name=\'default\',username="admin", password="admin"):
http = httplib2.Http()
http.add_credentials(username, password)
headers = {\'Accept\': \'application/json\'}
flow_name = \'flow_\' + str(int(time.time()*1000))
h1h4body1 =\'{"flow": [{"id": "1","match": {"ethernet-match":\'
\'{"ethernet-type": {"type": "2048"}},\'
\'"ipv4-source":"10.0.0.1/32","ipv4-destination": "10.0.0.4/32"},\'
\'"instructions": {"instruction": [{"order": "0",\'
\'"apply-actions": {"action": [{"output-action": {\'
\'"output-node-connector": "4"},"order": "0"}]}}]},\'
\'"priority": "101","cookie": "1","table_id": "0"}]}\'
mh1h4body1 =\'{"flow": [{"id": "1","match": {"ethernet-match":\'
\'{"ethernet-type": {"type": "2048"}},\'
\'"ipv4-source":"10.0.0.1/32","ipv4-destination": "10.0.0.4/32"},\'
\'"instructions": {"instruction": [{"order": "0",\'
\'"apply-actions": {"action": [{"output-action": {\'
\'"output-node-connector": "4"},"order": "0"}]}}]},\'
\'"priority": "102","cookie": "1","table_id": "0"}]}\'
h1h4body2 =\'{"flow": [{"id": "5","match": {"ethernet-match":\'
\'{"ethernet-type": {"type": "2048"}},\'
\'"ipv4-source":"10.0.0.1/32","ipv4-destination": "10.0.0.4/32"},\'
\'"instructions": {"instruction": [{"order": "0",\'
\'"apply-actions": {"action": [{"output-action": {\'
\'"output-node-connector": "2"},"order": "0"}]}}]},\'
\'"priority": "100","cookie": "5","table_id": "0"}]}\'
mh1h4body2 =\'{"flow": [{"id": "5","match": {"ethernet-match":\'
\'{"ethernet-type": {"type": "2048"}},\'
\'"ipv4-source":"10.0.0.1/32","ipv4-destination": "10.0.0.4/32"},\'
\'"instructions": {"instruction": [{"order": "0",\'
\'"apply-actions": {"action": [{"output-action": {\'
\'"output-node-connector": "2"},"order": "0"}]}}]},\'
\'"priority": "102","cookie": "5","table_id": "0"}]}\'
h1h4body3 =\'{"flow": [{"id": "6","match": {"ethernet-match":\'
\'{"ethernet-type": {"type": "2048"}},\'
\'"ipv4-source":"10.0.0.1/32","ipv4-destination": "10.0.0.4/32"},\'
\'"instructions": {"instruction": [{"order": "0",\'
\'"apply-actions": {"action": [{"output-action": {\'
\'"output-node-connector": "3"},"order": "0"}]}}]},\'
\'"priority": "99","cookie": "6","table_id": "0"}]}\'
mh1h4body3 =\'{"flow": [{"id": "6","match": {"ethernet-match":\'
\'{"ethernet-type": {"type": "2048"}},\'
\'"ipv4-source":"10.0.0.1/32","ipv4-destination": "10.0.0.4/32"},\'
\'"instructions": {"instruction": [{"order": "0",\'
\'"apply-actions": {"action": [{"output-action": {\'
\'"output-node-connector": "3"},"order": "0"}]}}]},\'
\'"priority": "102","cookie": "6","table_id": "0"}]}\'
h1h2body1 =\'{"flow": [{"id": "1","match": {"ethernet-match":\'
\'{"ethernet-type": {"type": "2048"}},\'
\'"ipv4-source":"10.0.0.1/32","ipv4-destination": "10.0.0.2/32"},\'
\'"instructions": {"instruction": [{"order": "0",\'
\'"apply-actions": {"action": [{"output-action": {\'
\'"output-node-connector": "4"},"order": "0"}]}}]},\'
\'"priority": "101","cookie": "1","table_id": "0"}]}\'
mh1h2body1 =\'{"flow": [{"id": "1","match": {"ethernet-match":\'
\'{"ethernet-type": {"type": "2048"}},\'
\'"ipv4-source":"10.0.0.1/32","ipv4-destination": "10.0.0.2/32"},\'
\'"instructions": {"instruction": [{"order": "0",\'
\'"apply-actions": {"action": [{"output-action": {\'
\'"output-node-connector": "4"},"order": "0"}]}}]},\'
\'"priority": "102","cookie": "1","table_id": "0"}]}\'
h1h2body2 =\'{"flow": [{"id": "5","match": {"ethernet-match":\'
\'{"ethernet-type": {"type": "2048"}},\'
\'"ipv4-source":"10.0.0.1/32","ipv4-destination": "10.0.0.2/32"},\'
\'"instructions": {"instruction": [{"order": "0",\'
\'"apply-actions": {"action": [{"output-action": {\'
\'"output-node-connector": "2"},"order": "0"}]}}]},\'
\'"priority": "100","cookie": "5","table_id": "0"}]}\'
mh1h2body2 =\'{"flow": [{"id": "5","match": {"ethernet-match":\'
\'{"ethernet-type": {"type": "2048"}},\'
\'"ipv4-source":"10.0.0.1/32","ipv4-destination": "10.0.0.2/32"},\'
\'"instructions": {"instruction": [{"order": "0",\'
\'"apply-actions": {"action": [{"output-action": {\'
\'"output-node-connector": "2"},"order": "0"}]}}]},\'
\'"priority": "102","cookie": "5","table_id": "0"}]}\'
h1h2body3 =\'{"flow": [{"id": "6","match": {"ethernet-match":\'
\'{"ethernet-type": {"type": "2048"}},\'
\'"ipv4-source":"10.0.0.1/32","ipv4-destination": "10.0.0.2/32"},\'
\'"instructions": {"instruction": [{"order": "0",\'
\'"apply-actions": {"action": [{"output-action": {\'
\'"output-node-connector": "3"},"order": "0"}]}}]},\'
\'"priority": "99","cookie": "6","table_id": "0"}]}\'
mh1h2body3 =\'{"flow": [{"id": "6","match": {"ethernet-match":\'
\'{"ethernet-type": {"type": "2048"}},\'
\'"ipv4-source":"10.0.0.1/32","ipv4-destination": "10.0.0.2/32"},\'
\'"instructions": {"instruction": [{"order": "0",\'
\'"apply-actions": {"action": [{"output-action": {\'
\'"output-node-connector": "3"},"order": "0"}]}}]},\'
\'"priority": "102","cookie": "6","table_id": "0"}]}\'
h1h3body1 =\'{"flow": [{"id": "1","match": {"ethernet-match":\'
\'{"ethernet-type": {"type": "2048"}},\'
\'"ipv4-source":"10.0.0.1/32","ipv4-destination": "10.0.0.3/32"},\'
\'"instructions": {"instruction": [{"order": "0",\'
\'"apply-actions": {"action": [{"output-action": {\'
\'"output-node-connector": "4"},"order": "0"}]}}]},\'
\'"priority": "101","cookie": "1","table_id": "0"}]}\'
mh1h3body1 =\'{"flow": [{"id": "1","match": {"ethernet-match":\'
\'{"ethernet-type": {"type": "2048"}},\'
\'"ipv4-source":"10.0.0.1/32","ipv4-destination": "10.0.0.3/32"},\'
\'"instructions": {"instruction": [{"order": "0",\'
\'"apply-actions": {"action": [{"output-action": {\'
\'"output-node-connector": "4"},"order": "0"}]}}]},\'
\'"priority": "102","cookie": "1","table_id": "0"}]}\'
h1h3body2 =\'{"flow": [{"id": "5","match": {"ethernet-match":\'
\'{"ethernet-type": {"type": "2048"}},\'
\'"ipv4-source":"10.0.0.1/32","ipv4-destination": "10.0.0.3/32"},\'
\'"instructions": {"instruction": [{"order": "0",\'
\'"apply-actions": {"action": [{"output-action": {\'
\'"output-node-connector": "2"},"order": "0"}]}}]},\'
\'"priority": "100","cookie": "5","table_id": "0"}]}\'
mh1h3body2 =\'{"flow": [{"id": "5","match": {"ethernet-match":\'
\'{"ethernet-type": {"type": "2048"}},\'
\'"ipv4-source":"10.0.0.1/32","ipv4-destination": "10.0.0.3/32"},\'
\'"instructions": {"instruction": [{"order": "0",\'
\'"apply-actions": {"action": [{"output-action": {\'
\'"output-node-connector": "2"},"order": "0"}]}}]},\'
\'"priority": "102","cookie": "5","table_id": "0"}]}\'
h1h3body3 =\'{"flow": [{"id": "6","match": {"ethernet-match":\'
\'{"ethernet-type": {"type": "2048"}},\'
\'"ipv4-source":"10.0.0.1/32","ipv4-destination": "10.0.0.3/32"},\'
\'"instructions": {"instruction": [{"order": "0",\'
\'"apply-actions": {"action": [{"output-action": {\'
\'"output-node-connector": "3"},"order": "0"}]}}]},\'
\'"priority": "99","cookie": "6","table_id": "0"}]}\'
mh1h3body3 =\'{"flow": [{"id": "6","match": {"ethernet-match":\'
\'{"ethernet-type": {"type": "2048"}},\'
\'"ipv4-source":"10.0.0.1/32","ipv4-destination": "10.0.0.3/32"},\'
\'"instructions": {"instruction": [{"order": "0",\'
\'"apply-actions": {"action": [{"output-action": {\'
\'"output-node-connector": "3"},"order": "0"}]}}]},\'
\'"priority": "102","cookie": "6","table_id": "0"}]}\'
headers = {\'Content-type\': \'application/json\'}
num=0
while num < 4 :
response, content = http.request(uri=\'http://127.0.0.1:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/1\', body=mh1h4body1, method=\'PUT\',headers=headers)
response, content = http.request(uri=\'http://127.0.0.1:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/1\', body=mh1h3body1, method=\'PUT\',headers=headers)
response, content = http.request(uri=\'http://127.0.0.1:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/1\', body=mh1h2body1, method=\'PUT\',headers=headers)
time.sleep(0.1)
response, content = http.request(uri=\'http://127.0.01:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/1\', body=h1h4body1, method=\'PUT\',headers=headers)
response, content = http.request(uri=\'http://127.0.01:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/5\', body=mh1h4body2, method=\'PUT\',headers=headers)
response, content = http.request(uri=\'http://127.0.01:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/1\', body=h1h3body1, method=\'PUT\',headers=headers)
response, content = http.request(uri=\'http://127.0.01:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/5\', body=mh1h3body2, method=\'PUT\',headers=headers)
response, content = http.request(uri=\'http://127.0.01:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/1\', body=h1h2body1, method=\'PUT\',headers=headers)
response, content = http.request(uri=\'http://127.0.01:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/5\', body=mh1h2body2, method=\'PUT\',headers=headers)
time.sleep(0.1)
response, content = http.request(uri=\'http://127.0.0.1:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/5\', body=h1h4body2, method=\'PUT\',headers=headers)
response, content = http.request(uri=\'http://127.0.0.1:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/6\', body=mh1h4body3, method=\'PUT\',headers=headers)
response, content = http.request(uri=\'http://127.0.0.1:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/5\', body=h1h3body2, method=\'PUT\',headers=headers)
response, content = http.request(uri=\'http://127.0.0.1:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/6\', body=mh1h3body3, method=\'PUT\',headers=headers)
response, content = http.request(uri=\'http://127.0.0.1:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/5\', body=h1h2body2, method=\'PUT\',headers=headers)
response, content = http.request(uri=\'http://127.0.0.1:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/6\', body=mh1h2body3, method=\'PUT\',headers=headers)
time.sleep(0.1)
response, content = http.request(uri=\'http://127.0.0.1:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/6\', body=h1h4body3, method=\'PUT\',headers=headers)
response, content = http.request(uri=\'http://127.0.0.1:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/6\', body=h1h3body3, method=\'PUT\',headers=headers)
response, content = http.request(uri=\'http://127.0.0.1:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/6\', body=h1h2body3, method=\'PUT\',headers=headers)
print(content.decode())
odl = OdlUtil(\'127.0.0.1\', \'8181\')
odl.install_flow()
- 代码大概思路：
主机h1发往主机h2h3h4，只在途中经过交换机123的时候进行择路。
四、课程感想 计算机的各个领域是相互贯通的，要联系学习，增强自主学习能力和查阅资料能力、动手能力。 了解了 什么是 SDN ，SDN 的基本思想、特点 有哪些控制器，控制层和数据层的通信标准协议 分布式控制器的几种扩展方式 ODL设计的三个层次 SDN 的应用领域 openflow多级流表机制的优点 ryu控制器 onos控制器 opendaylight控制器 接触了 SDNLAB 等几个优质的学习网站 网络相关知识 学会了 安装mininet 用字符命令生成拓扑并测试连通性 用可视化界面生成拓扑并测试连通性 用Python脚本生成Fat-tree型的拓扑 安装floodlight 生成拓扑并连接控制器floodlight，利用控制器floodlight查看图形拓扑 利用字符界面下发流表，通过测试联通性，来验证openflow的hardtime机制 利用OVS命令下发流表，实现VLAN功能 利用OVS命令查看流表 Wireshark抓包验证 借助Postman通过ODL的北向接口下发流表，再利用ODL北向接口查看已下发的流表 利用ODL下发组表、流表，实现建议负载均衡 利用Wireshark验证负载均衡的实现 学会了p4语言