《虚拟化和云计算》实验报告——MININET实践SDN

素颜马尾好姑娘i 2022-10-15 13:49 175阅读 0赞

# MiniNet #

> 由一些虚拟的终端节点(end-hosts)、交换机、路由器连接而成的一个网络仿真器，支持0penflow协议，可以用它来实践SDN。

# MiniNet安装 #

## 源码安装 ##

git clone git://github.com/mininet/mininet

![在这里插入图片描述][20210525143440132.png]

cd mininet/util
    ./install.sh -a

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI3Mjc4MQ_size_16_color_FFFFFF_t_70]

## 直接安装 ##

apt install mininet

## 安装测试 ##

sudo mn # 会显示mn的默认网络拓扑
    pingall # 使用pingall测试，会显示主机h1和h2可以ping通
    nodes #其他命令测试
    net

![在这里插入图片描述][20210525144500328.png]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI3Mjc4MQ_size_16_color_FFFFFF_t_70 1]

# singe,3 #

sudo mn --topo singe,3
    pingall 
    nodes
    net

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI3Mjc4MQ_size_16_color_FFFFFF_t_70 2]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI3Mjc4MQ_size_16_color_FFFFFF_t_70 3]

# linear,3 #

sudo mn --topo linear,3
    pingall 
    nodes
    net

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI3Mjc4MQ_size_16_color_FFFFFF_t_70 4]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI3Mjc4MQ_size_16_color_FFFFFF_t_70 5]

# tree,2 #

sudo mn --topo tree,2
    pingall 
    nodes
    net

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI3Mjc4MQ_size_16_color_FFFFFF_t_70 6]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI3Mjc4MQ_size_16_color_FFFFFF_t_70 7]

# cutsom #

cd mininet/custom
    ll
    mn --custom topo-2sw-2host.py --topo mytopo
    pingall 
    nodes
    net

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI3Mjc4MQ_size_16_color_FFFFFF_t_70 8]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI3Mjc4MQ_size_16_color_FFFFFF_t_70 9]

## custom修改 ##

vim topo-2sw-2host.py
    mn --custom topo-2sw-2host.py --topo mytopo
    pingall 
    nodes
    net

from mininet.topo import Topo
    
    class MyTopo( Topo ):
        "Simple topology example."
    
        def build( self ):
            "Create custom topo."
    
            # Add hosts and switches
            leftHost = self.addHost( 'h1' )
            midHost = self.addHost( 'h3' )
            rightHost = self.addHost( 'h2' )
            leftSwitch = self.addSwitch( 's1' )
            midSwitch = self.addSwitch( 's3' )
            rightSwitch = self.addSwitch( 's2' )
    
            # Add links
            self.addLink( leftHost, leftSwitch )
            self.addLink( leftSwitch, midSwitch)
            self.addLink( midHost, midSwitch )
            self.addLink( midSwitch, rightSwitch )
            self.addLink( rightSwitch, rightHost )
    
    
    topos = {  'mytopo': ( lambda: MyTopo() ) }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI3Mjc4MQ_size_16_color_FFFFFF_t_70 10]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI3Mjc4MQ_size_16_color_FFFFFF_t_70 11]

# Ryu #

> RYU是一款基于python的控制器，你可用Ryu实现各种想要实现的网络功能，它可以下发或接收流表进行各种路由运算。

## Ryu 安装 ##

apt-get update
    apt install python3-pip
    pip3 install ryu

## Ryu 测试 ##

ryu-manager

![在这里插入图片描述][20210525145951990.png]

## Ryu 简单使用 ##

### Test 1 ###

Terminal 1

ryu-manager

![在这里插入图片描述][20210525145951990.png]  
Terminal 2

mn --controller=remote,ip=127.0.0.1,port=6653
    pingall
    h1 ping h2

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI3Mjc4MQ_size_16_color_FFFFFF_t_70 12]  
无法ping通

### Test2 ###

Terminal 1

ryu-manager ryu.app.simple_switch

![在这里插入图片描述][20210525150506836.png]

Terminal 2

mn --controller=remote,ip=127.0.0.1,port=6653
    pingall
    h1 ping h2

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI3Mjc4MQ_size_16_color_FFFFFF_t_70 13]

## Ryu Restful 控制 ##

> 官方文档：https://ryu.readthedocs.io/en/latest/app/ofctl\_rest.html

### 构建 ###

ryu-manager ryu.app.ofctl_rest

![在这里插入图片描述][20210525150924322.png]  
Terminal 2

mn --controller=remote,ip=127.0.0.1,port=6653
    pingall
    h1 ping h2

![在这里插入图片描述][20210525151504179.png]  
无法ping通

### 获取信息 ###

> GET 192.168.30.134:8080/stats/desc/1

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI3Mjc4MQ_size_16_color_FFFFFF_t_70 14]

### 获取交换机流表 ###

获取dpid为1的交换机流表

> GET 192.168.30.134:8080/stats/flow/1

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI3Mjc4MQ_size_16_color_FFFFFF_t_70 15]

### 增加流表表项 ###

> POST 192.168.30.134:8080/stats/flowentry/add

{ 
        "dpid": 1,
        "match": { 
            "in_port": 1
        },
        "actions": [
            { 
                "type": "OUTPUT",
                "port": 2
            }
        ]
    }

{ 
        "dpid": 1,
        "match": { 
            "in_port": 2
        },
        "actions": [
            { 
                "type": "OUTPUT",
                "port": 1
            }
        ]
    }

ping通

### 删除流表表项 ###

> POST 192.168.30.134:8080/stats/flowentry/clear/1

无法ping通

# 参考文章 #

[20210525143440132.png]: /images/20221014/6cabb93e54814c72885b76d6eb30f681.png
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[20210525144500328.png]: /images/20221014/5e37b72fcbd441f58e2828b4d9a6cd28.png
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI3Mjc4MQ_size_16_color_FFFFFF_t_70 3]: /images/20221014/e45bd626859b40149d11aa0d21ff2503.png
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[20210525145951990.png]: /images/20221014/6ce108c9bc8b4f16a3728e8d03758d23.png
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[20210525150924322.png]: /images/20221014/58e9001703834fe7a1342db27e0f9542.png
[20210525151504179.png]: /images/20221014/e55c735094344ab2bd54ac713940b9f6.png
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