这是一篇之前写的笔记，主要记录了使用openvswitch + Docker 等进行一个小型的SDN网络搭建的操作步骤。由于
之前临时有其他任务，耽搁了一下，最近开始重新整理，并计划开发一个简单的Python脚本，简化该网络的创建过程。
同时希望该脚本可以和控制器的程序进行融合，方便未来可以和docker更容易的结合在一起。项目地址:DockerSDN。
以下内容或许存在问题，如果在实现过程中发现问题，可与我联系，谢谢、
Date: 2018.7.9
Auther: joliu ljo0412@live.com
- OpenFlow
- basic knowlege
- OVS command
- how to add flow table to open vSwitch
- how to bind dockers to vSwitch
Install ovs and mininet
Install Docker
Use DaoCloud accelerator
curl -sSL https://get.daocloud.io/docker | sh
Change Docker registry to Aliyun
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
"registry-mirrors": ["https://xxxxxxx.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker
请替换https://xxxxxxx.mirror.aliyuncs.com，详细配置内容参见我的另外一篇随笔CentOS7使用阿里源安装最新版Docker
Get Basic Docker Image
docker pull alpine
Exercise 1
Create Three Container
docker run -d -i --name RouterA --net=none --privileged alpine sh
docker run -d -i --name RouterB --net=none --privileged alpine sh
docker run -d -i --name RouterC --net=none --privileged alpine sh
Check Containers' Status
[typh@localhost ~]$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
37b9ca888f03 alpine "sh" About a minute ago Up About a minute RouterC
f1604beb380f alpine "sh" About a minute ago Up About a minute RouterB
3b3c52c5a582 alpine "sh" 3 minutes ago Up 3 minutes
Create Virtual Network Bridge
sudo ovs-vsctl add-br vnbr
Set Protocols
ovs-vsctl set bridge br0 protocols=OpenFlow13
Check the brige is added
[typh@localhost ~]$ sudo ovs-vsctl show
d9d42750-7b9b-4688-adf9-d07f619e9bac
Bridge vnbr
Port vnbr
Interface vnbr
type: internal
ovs_version: "2.5.0"
Add Network Port
sudo ovs-docker add-port vnbr eth0 RouterA --ipaddress="10.0.1.1/24"
sudo ovs-docker add-port vnbr eth0 RouterB --ipaddress="10.0.1.2/24"
sudo ovs-docker add-port vnbr eth0 RouterC --ipaddress="10.0.3.1"
Check The Status of vnbr
[typh@localhost ~]$ sudo ovs-vsctl show
d9d42750-7b9b-4688-adf9-d07f619e9bac
Bridge vnbr
Port vnbr
Interface vnbr
type: internal
Port "facad1a218c64_l"
Interface "facad1a218c64_l"
Port "d48d429fe1894_l"
Interface "d48d429fe1894_l"
Port "12437ccb4eab4_l"
Interface "12437ccb4eab4_l"
ovs_version: "2.5.0"
Set OpenFlow Port ID
sudo ovs-vsctl set interface facad1a218c64_l ofport_request=100
sudo ovs-vsctl set interface d48d429fe1894_l ofport_request=200
sudo ovs-vsctl set interface 12437ccb4eab4_l ofport_request=300
Connect to ODL Controller
sudo ovs-vsctl set-controller vnbr tcp:127.0.0.1:6633
Check the Connections with Controller
d9d42750-7b9b-4688-adf9-d07f619e9bac
Bridge vnbr
Controller "tcp:127.0.0.1:6633"
is_connected: true
Port vnbr
Interface vnbr
type: internal
Port "facad1a218c64_l"
Interface "facad1a218c64_l"
Port "d48d429fe1894_l"
Interface "d48d429fe1894_l"
Port "12437ccb4eab4_l"
Interface "12437ccb4eab4_l"
ovs_version: "2.5.0"
Test the connection between the two host By PING
docker exec -it RouterA ping -c 4 10.0.1.2
Generally, they cannot connect with the other.
Add Flows
sudo ovs-ofctl add-flow vnbr "priority=1 idle_timeout=0,in_port=1,actions=output:2"
sudo ovs-ofctl add-flow vnbr "priority=2 idle_timeout=0,in_port=1,actions=output:1"
Get the Flows from vSwitch
ovs-ofctl -O OpenFlow13 dump-flows vnbr
Test Again.
docker exec -it RouterA ping -c 4 10.0.1.2
Example of the successful result.
[master@MiWiFi-R3-srv ~]$ sudo docker exec -it RouterA ping -c 4 10.0.1.2
PING 10.0.1.2 (10.0.1.2): 56 data bytes
64 bytes from 10.0.1.2: seq=0 ttl=64 time=0.062 ms
64 bytes from 10.0.1.2: seq=1 ttl=64 time=0.061 ms
64 bytes from 10.0.1.2: seq=2 ttl=64 time=0.086 ms
64 bytes from 10.0.1.2: seq=3 ttl=64 time=0.078 ms
--- 10.0.1.2 ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max = 0.061/0.071/0.086 ms
Start karaf
feature:install odl-restconf odl-l2switch-switch odl-mdsal-apidocs odl-dlux-all