Ubuntu下SDN环境配置

升级PIP

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sudo apt install curl
curl https://bootstrap.pypa.io/pip/3.5/get-pip.py -o get-pip.py
python3 get-pip.py -i https://pypi.tuna.tsinghua.edu.cn/simple

安装Mininet

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sudo apt-get install git
git clone git://github.com/mininet/mininet
cd mininet/util
sudo ./install.sh -n
sudo ./install.sh -f

安装Ryu

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git clone https://github.com/faucetsdn/ryu.git
sudo apt install gcc python-dev libffi-dev libssl-dev libxml2-dev libxslt1-dev zlib1g-dev 
cd ryu 
pip3 install . -i https://pypi.tuna.tsinghua.edu.cn/simple

测试安装

使用mininet自带的测试方式

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sudo mn --switch ovsbr --test pingall

使用Ryu的simple_switch进行功能测试

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sudo mn --controller=remote,ip=127.0.0.1,port=6653
ryu-manager --verbose simple_switch_13.py

OVS源码安装

从OVS官网下载源码压缩包

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wget https://www.openvswitch.org/releases/openvswitch-2.15.1.tar.gz
tar -zxvf openvswitch-2.15.1.tar.gz

进入OVS目录进行编译与安装

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cd openvswitch-2.15.1/
# Bootstrapping
./boot.sh
# Configure the package by running the configure script
./configure  --with-linux=/lib/modules/`uname -r`/build
# Run GNU make in the build directory
make
# Install the executables and manpages into the running system, by default under /usr/local
sudo make install
# If you built kernel modules, you may install them
sudo make modules_install

查看OVS相关内核模块的信息

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# 检查内核模块依赖组件
modinfo datapath/linux/openvswitch.ko

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# 安装对应的依赖组件
sudo modprobe nf_conntrack
sudo modprobe tunnel6
sudo modprobe nf_nat
sudo modprobe nf_defrag_ipv6
sudo modprobe libcrc32c
sudo modprobe nf_nat_ipv6
sudo modprobe nf_nat_ipv4

加载安装OVS内核模块

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# Finally, load the kernel modules that you need
sudo insmod datapath/linux/openvswitch.ko
# 该语句存在问题 因此使用上一行的语句进行内核模块安装
sudo /sbin/modprobe openvswitch
# To verify that the modules have been loaded
/sbin/lsmod | grep openvswitch

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# 初始化数据库
sudo mkdir -p /usr/local/etc/openvswitch
sudo ovsdb-tool create /usr/local/etc/openvswitch/conf.db vswitchd/vswitch.ovsschema
sudo mkdir -p /usr/local/var/run/openvswitch
# 创建日志文件
sudo mkdir -p /usr/local/var/log/openvswitch
sudo touch /usr/local/var/log/openvswitch/ovsdb-server.log
sudo touch /usr/local/var/log/openvswitch/ovs-vswitchd.log

创建启动脚本，写入每次系统启动后的初始化命令

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cd ~/Desktop
# 创建启动脚本
gedit ovs-start
# 启动脚本内容
ovsdb-server --remote=punix:/usr/local/var/run/openvswitch/db.sock \
		--remote=db:Open_vSwitch,Open_vSwitch,manager_options \
		--private-key=db:Open_vSwitch,SSL,private_key \
		--certificate=db:Open_vSwitch,SSL,certificate \
		--bootstrap-ca-cert=db:Open_vSwitch,SSL,ca_cert \
		--pidfile --detach --log-file
ovs-vsctl --no-wait init
ovs-vswitchd --pidfile --detach --log-file

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# 修改为可执行
sudo chmod a+x ovs-start
# 启动
sudo ./ovs-start

每次系统重启后，需执行以下命令以启动OVS

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sudo ./ovs-start

OVS内核组件的卸载

方式一

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lsmod | grep openvswitch

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sudo rmmod openvswitch
# 检查没有输出
lsmod | grep openvswitch

方式二

采用新立德管理器移除

Ubuntu18或更高版本的包安装

包安装mininet

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sudo apt-get install mininet

包安装Ryu

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sudo apt install gcc python-dev libffi-dev libssl-dev libxml2-dev libxslt1-dev zlib1g-dev  
sudo apt install python3-ryu