SDN(二）使用Ryu控制器

前言

上一节中介绍了使用floodlight搭建环境的方法，后来在跟研三学长交流的过程中，发现一个比较成熟的东西：Ryu，控制器，其功能强大，支持python API.而floodlight坑比较多，支持的是java.故而趁早跳坑，改用Ryu.

搭建过程

安装Ryu控制器：

1. 下载ryu源码并安装:

使用git

    git clone git://github.com/osrg/ryu.git
    cd ryu
    sudo python ./setup.py install

下载源码

ryu v4.12.zip
解压到/home/
cd /home/ryu/
sudo python ./setup.py install
其间 需要安装setuptools
先修改一个有用的软件源,如阿里、163

sudo apt-get update
sudo apt-get install pip
sudo pip install -U setuptools

其间可能报错：
The ‘repoze.lru>=0.3’ distribution was not found and is required by routes

安装 repoze:

sudo pip install -U repoze.lru

还可能遇到：
The ‘debtcollector>=1.2.0’ distribution was not found and is required by oslo.config
安装 debtcollector

sudo pip install -U debtcollector

还可能遇到：
The ‘stevedore>=1.20.0’ distribution was not found and is required by oslo.config
安装：stevedore

sudo pip  install  -U stevedore

···少什么安装什么，555555
在安装greenlet出现：
greenlet.h:8:20: fatal error: Python.h: No such file or directory
解决：

sudo apt-get install python-dev python3-dev

少enum34 安装 enum34:

sudo pip  install  -U enum34

看一下有没有安装成功：

sudo ryu-manager --version

如果显示：ryu-manager 4.13 说明成功了
太烦了！最简单的安装方法：

安装依赖库：
sudo apt-get install python-dev python3-dev python-pip python-settools git -y
git clone git://github.com/osrg/ryu.git
cd ryu
sudo python  install ./

使用控制器

1. 开启控制器

   sudo ryu-manager --verbose ./ryu/ryu/app/simple_switch_13.py 

   效果如下：

   loading app simple_switch_13.py
   loading app ryu.controller.ofp_handler
   instantiating app simple_switch_13.py of SimpleSwitch13
   instantiating app ryu.controller.ofp_handler of OFPHandler
   BRICK SimpleSwitch13
   CONSUMES EventOFPSwitchFeatures
   CONSUMES EventOFPPacketIn
   BRICK ofp_event
   PROVIDES EventOFPSwitchFeatures TO {
         'SimpleSwitch13': set(['config'])}
   PROVIDES EventOFPPacketIn TO {
         'SimpleSwitch13': set(['main'])}
   CONSUMES EventOFPEchoReply
   CONSUMES EventOFPHello
   CONSUMES EventOFPSwitchFeatures
   CONSUMES EventOFPErrorMsg
   CONSUMES EventOFPEchoRequest
   CONSUMES EventOFPPortStatus
   CONSUMES EventOFPPortDescStatsReply
   

2. 开启mininet虚拟网即可

    sudo mn --controller=remote,ip=192.168.1.197,port=6653