[cloud][OVS][sdn] Open vSwitch 初步了解
What is Open vSwitch?
Open vSwitch is a production quality, multilayer virtual switch licensed under the open source Apache 2.0 license. It is designed to enable massive network automation through programmatic extension, while still supporting standard management interfaces and protocols (e.g. NetFlow, sFlow, IPFIX, RSPAN, CLI, LACP, 802.1ag). In addition, it is designed to support distribution across multiple physical servers similar to VMware's vNetwork distributed vswitch or Cisco's Nexus 1000V. See full feature list here
Why Open vSwitch ?
https://github.com/openvswitch/ovs/blob/master/Documentation/intro/why-ovs.rst
OVN:
http://www.openvswitch.org/support/dist-docs/ovn-architecture.7.html
CMS
|
|
+-----------|-----------+
| | |
| OVN/CMS Plugin |
| | |
| | |
| OVN Northbound DB |
| | |
| | |
| ovn-northd |
| | |
+-----------|-----------+
|
|
+-------------------+
| OVN Southbound DB |
+-------------------+
|
|
+------------------+------------------+
| | |
HV | | HV n |
+---------------|---------------+ . +---------------|---------------+
| | | . | | |
| ovn-controller | . | ovn-controller |
| | | | . | | | |
| | | | | | | |
| ovs-vswitchd ovsdb-server | | ovs-vswitchd ovsdb-server |
| | | |
+-------------------------------+ +-------------------------------+
在继续之前,做好先理解一下 namespace:
[cloud][sdn] network namespace
下面两篇中文介绍,内容相似,写的都不咋样。
http://fishcried.com/2016-02-09/openvswitch-ops-guide/
https://blog.kghost.info/2014/11/19/openvswitch-internal/
这个偏实践指导,写的好:
https://www.ibm.com/developerworks/cn/cloud/library/1401_zhaoyi_openswitch/
从源码编译:
文档:https://docs.openvswitch.org/en/latest/intro/install/general/
需要注意是否支持内核模块的编译,有所不同。
[root@D128 thirdparty]# git clone https://github.com/openvswitch/ovs.git
[root@D128 ovs]# git checkout v2.7.0
[root@D128 ovs]# yum install autoconf automake libtool
[root@D128 ovs]# ./boot.sh
[root@D128 ovs]# ./configure --prefix=/root/BUILD_ovs/
[root@D128 ovs]# make
[root@D128 ovs]# make install
上边是没编译内核模块的。。。
再编个内核模块吧!!
[root@D128 ovs]# yum install kernel-devel-$(uname -r)
[root@D128 ovs]# ./configure --prefix=/root/BUILD_ovs/ --with-linux=/lib/modules/$(uname -r)/build
[root@D128 ovs]# uname -a
Linux D128 3.10.-.el7.x86_64 # SMP Tue Aug :: UTC x86_64 x86_64 x86_64 GNU/Linux
kernel版本太旧,编不过。降版本到v2.6.0
[root@D128 ovs]# git checkout v2.6.0
Previous HEAD position was c298ef7... Set release date for 2.7..
HEAD is now at 7a0f907... Set release date for 2.6..
[root@D128 ovs]# git branch
* (detached from v2.6.0)
master
[root@D128 ovs]#
还是编不过。如果想编译通过必须要找对彼此兼容的版本。算了直接用centos自带的ko(反正是学习了解阶段,但愿能兼容跑起来)。。。
[root@D128 ovs]# modprobe openvswitch
[root@D128 ovs]# lsmod|grep openvswitch
openvswitch
nf_nat_ipv6 openvswitch
nf_nat_ipv4 openvswitch
nf_defrag_ipv6 openvswitch,nf_conntrack_ipv6
nf_nat openvswitch,nf_nat_ipv4,nf_nat_ipv6
nf_conntrack openvswitch,nf_nat,nf_nat_ipv4,nf_nat_ipv6,nf_conntrack_ipv4,nf_conntrack_ipv6
libcrc32c xfs,openvswitch,nf_nat,nf_conntrack
[root@D128 ovs]#
运行:
[root@D128 ovs]# export PATH=$PATH:/root/BUILD_ovs/share/openvswitch/scripts/
[root@D128 ~]# ovs-ctl --system-id=random start
Starting ovsdb-server [ OK ]
Configuring Open vSwitch system IDs [ OK ]
Starting ovs-vswitchd [ OK ]
Enabling remote OVSDB managers [ OK ]
[root@D128 ~]#
数据库应该已经建立了默认的,并且都初始化了。
测试:
[root@D128 BUILD_ovs]# ip link
: lo: <LOOPBACK,UP,LOWER_UP> mtu qdisc noqueue state UNKNOWN mode DEFAULT qlen
link/loopback ::::: brd :::::
: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu qdisc pfifo_fast state UP mode DEFAULT qlen
link/ether :0c::2f:cf: brd ff:ff:ff:ff:ff:ff
[root@D128 BUILD_ovs]# ./bin/ovs-vsctl add-br br0
[root@D128 BUILD_ovs]# ip link
: lo: <LOOPBACK,UP,LOWER_UP> mtu qdisc noqueue state UNKNOWN mode DEFAULT qlen
link/loopback ::::: brd :::::
: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu qdisc pfifo_fast state UP mode DEFAULT qlen
link/ether :0c::2f:cf: brd ff:ff:ff:ff:ff:ff
3: ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT qlen 1000
link/ether 92:e5:c6:d2:ec:a2 brd ff:ff:ff:ff:ff:ff
4: br0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT qlen 1000
link/ether be:e8:bd:df:ff:41 brd ff:ff:ff:ff:ff:ff
[root@D128 BUILD_ovs]# ./bin/ovs-vsctl add-port br0 ens33
[root@D128 BUILD_ovs]# brctl show
bridge name bridge id STP enabled interfaces
[root@D128 BUILD_ovs]#
ovs-vsctl add-br 增加的这俩个设备是什么?
我写了个脚本去判断:
[root@D128 ~]# cat ip_link_show_type.sh
#! /bin/bash TYPE=" vlan veth vcan dummy ifb macvlan macvtap bridge bond ipoib ip6tnl ipip sit vxlan gre gretap ip6gre ip6gretap vti nlmon bond_slave geneve bridge_slave macsec" for T in $TYPE
do
echo $T
ip link show type $T
done
竟然不属于这里边任意一个类型。。。。
虽然没有正面回答,但是看一下下面这个问题的答案,就能很好的理解了:
同时,也讲解了KVM的tap设备怎么可OVS协作,以及需要注意什么。
https://github.com/openvswitch/ovs/blob/master/Documentation/faq/issues.rst
Q: I created a tap device tap0, configured an IP address on it, and added it to a bridge, like this:
大概就是说,OVS的bridge和OVS的internal port是OVS单独实现的两种特殊设备。
报错:
[root@D128 BUILD_ovs]# ./bin/ovs-vsctl add-port br0 p0
ovs-vsctl: Error detected while setting up 'p0': could not open network device p0 (No such device). See ovs-vswitchd log for details.
ovs-vsctl: The default log directory is "/root/BUILD_ovs/var/log/openvswitch".
[root@D128 BUILD_ovs]#
要这样:
https://github.com/openvswitch/ovs-issues/issues/110
The port‘s name should be a exist interface use ifconfig to see, such as eth0. If you just want to use a virtual port name to make a test you should
specify the port's type like ovs-vsctl add-port br0 port0 -- set Interface port0 type=internal or ovs-vsctl set Interface port0 type=internal
[root@D128 BUILD_ovs]# ./bin/ovs-vsctl add-port br0 port0 -- set Interface port0 type=internal
[root@D128 BUILD_ovs]# ip link
: lo: <LOOPBACK,UP,LOWER_UP> mtu qdisc noqueue state UNKNOWN mode DEFAULT qlen
link/loopback ::::: brd :::::
: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu qdisc pfifo_fast state UP mode DEFAULT qlen
link/ether :0c::2f:cf: brd ff:ff:ff:ff:ff:ff
: ovs-system: <BROADCAST,MULTICAST> mtu qdisc noop state DOWN mode DEFAULT qlen
link/ether :e5:c6:d2:ec:a2 brd ff:ff:ff:ff:ff:ff
: br0: <BROADCAST,MULTICAST> mtu qdisc noop state DOWN mode DEFAULT qlen
link/ether be:e8:bd:df:ff: brd ff:ff:ff:ff:ff:ff
: port0: <BROADCAST,MULTICAST> mtu qdisc noop state DOWN mode DEFAULT qlen
link/ether f6:cb:c2::fc:e0 brd ff:ff:ff:ff:ff:ff
[root@D128 BUILD_ovs]# ./bin/ovs-vsctl show
528b5679-22e8-484b-947b-4499959dc341
Bridge "br0"
Port "port0"
Interface "port0"
type: internal
Port "br0"
Interface "br0"
type: internal
ovs_version: "2.7.0"
[root@D128 BUILD_ovs]#
查看br0,port0这两个设备。
[root@D128 BUILD_ovs]# ethtool -i br0
driver: openvswitch
version:
firmware-version:
expansion-rom-version:
bus-info:
supports-statistics: no
supports-test: no
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: no
[root@D128 BUILD_ovs]# ethtool -i port0
driver: openvswitch
version:
firmware-version:
expansion-rom-version:
bus-info:
supports-statistics: no
supports-test: no
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: no
[root@D128 BUILD_ovs]#
增加namespace
[root@D128 BUILD_ovs]# ip netns add ns0
[root@D128 BUILD_ovs]# ip link set port0 netns ns0
[root@D128 BUILD_ovs]# ip netns exec ns0 ip addr add 192.168.1.100/ dev port0
[root@D128 BUILD_ovs]# ip netns exec ns0 ifconfig port0 promisc up
查看:
[root@D128 BUILD_ovs]# ./bin/ovs-ofctl show br0
OFPT_FEATURES_REPLY (xid=0x2): dpid:0000bee8bddfff41
n_tables:, n_buffers:
capabilities: FLOW_STATS TABLE_STATS PORT_STATS QUEUE_STATS ARP_MATCH_IP
actions: output enqueue set_vlan_vid set_vlan_pcp strip_vlan mod_dl_src mod_dl_dst mod_nw_src mod_nw_dst mod_nw_tos mod_tp_src mod_tp_dst
(port0): addr:::::0c:e1
config: PORT_DOWN
state: LINK_DOWN
speed: Mbps now, Mbps max
LOCAL(br0): addr:be:e8:bd:df:ff:
config: PORT_DOWN
state: LINK_DOWN
speed: Mbps now, Mbps max
OFPT_GET_CONFIG_REPLY (xid=0x4): frags=normal miss_send_len=
[root@D128 BUILD_ovs]# ./bin/ovs-dpctl show
system@ovs-system:
lookups: hit: missed: lost:
flows:
masks: hit: total: hit/pkt:1.21
port : ovs-system (internal)
port : br0 (internal)
port : port0 (internal)
[root@D128 BUILD_ovs]#
[root@D128 BUILD_ovs]# ip addr add 192.168.1.101/ dev br0
[root@D128 BUILD_ovs]# ip link set br0 up
现在两个namespace可以通过br0 互通了。
增加一个of规则
[root@D128 BUILD_ovs]# ./bin/ovs-ofctl add-flow br0 "priority=1 idle_timeout=0, in_port=2,actions=mod_nw_src:9.181.137.1,normal"
[root@D128 BUILD_ovs]# ./bin/ovs-ofctl show br0
OFPT_FEATURES_REPLY (xid=0x2): dpid:0000bee8bddfff41
n_tables:, n_buffers:
capabilities: FLOW_STATS TABLE_STATS PORT_STATS QUEUE_STATS ARP_MATCH_IP
actions: output enqueue set_vlan_vid set_vlan_pcp strip_vlan mod_dl_src mod_dl_dst mod_nw_src mod_nw_dst mod_nw_tos mod_tp_src mod_tp_dst
(port0): addr:::::0c:e1
config: PORT_DOWN
state: LINK_DOWN
speed: Mbps now, Mbps max
LOCAL(br0): addr:be:e8:bd:df:ff:
config:
state:
speed: Mbps now, Mbps max
OFPT_GET_CONFIG_REPLY (xid=0x4): frags=normal miss_send_len=
[root@D128 BUILD_ovs]# ./bin/ovs-
抓包可以看见,原地址已经被修改为9.181.137.1
[root@D128 BUILD_ovs]# tcpdump -i br0
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on br0, link-type EN10MB (Ethernet), capture size bytes
::00.988146 IP 9.181.137.1 > localhost: ICMP echo request, id , seq , length
::01.988227 IP 9.181.137.1 > localhost: ICMP echo request, id , seq , length
::02.988113 IP 9.181.137.1 > localhost: ICMP echo request, id , seq , length
::03.988133 IP 9.181.137.1 > localhost: ICMP echo request, id , seq , length
暂时先到这。作为一个初步了解。
-------------------------------------------------- update @ 2018-03-30 20:11 -----------------------------------
在OVS port上抓包。
把port流量镜像出来。
[root@vrouter-ovs ~]# ip link add dev mirror type dummy
[root@vrouter-ovs ~]# ip link set mirror up [root@dr-lb ~]# ovs-vsctl add-port ovs-br0 mirror
[root@vrouter-ovs ~]# ovs-vsctl -- set Bridge br-tun mirror=@mi -- --id=@pmirror get Port mirror -- --id=@patch get Port tun-to-int -- --id=@mi create Mirror name=mymi select-dst-port=@patch select-src-port=@patch output-port=@pmirror
[root@vrouter-ovs ~]# tcpdump -i mirror -nn
查看和删除mirror
# ovs-vsctl list Mirror
# ovs-vsctl clear bridge ovsbr0 mirrors
ovs-vsctl set Bridge ovs-br0 mirrors=@mi -- --id=@pmirror get Port mirror-br0 -- --id=@patch get port vxlanclient0 -- --id=@mi create Mirror name=mymi select-dst-port=@patch select-src-port=@patch output-port=@pmirror
[cloud][OVS][sdn] Open vSwitch 初步了解的更多相关文章
- [cloud][ovs][sdn] 安装 openvswitch-dpdk
[cloud][OVS][sdn] Open vSwitch 初步了解 继之前的内容,安装基于dpdk的ovs https://docs.openvswitch.org/en/latest/intro ...
- [qemu][cloud][centos][ovs][sdn] centos7安装高版本的qemu 以及 virtio/vhost/vhost-user咋回事
因为要搭建ovs-dpdk,所以需要vhost-user的qemu centos默认的qemu与qemu-kvm都不支持vhost-user,qemu最高版本是2.0.0, qemu-kvm最高版本是 ...
- SDN期末作业
期末项目 代码仓库:传送门 视频:组长已经发送给朱老师 选题:负载均衡场景3 选题内容: 该拓扑是数据中心拓扑的一部分,其中h1是数据中心外的一台客户机,h2-h5是数据中心内的服务器,请根据该拓扑实 ...
- 从三个开源项目认识OpenFlow交换机 - OVS
在SDN/NFV的网络革新技术浪潮的引领下,催生了诸多数据面开源方案的诞生.业界知名度较高的有OVS(Open vSwitch).FD.io (Fast Data I/O).ODP(Open Data ...
- SDN核心技术剖析和实战指南---读书笔记
第一章 SDN定义如下: SDN是一种新兴的基于软件的网络架构及技术,其最大的特点在于具有松耦合的控制平面与数据平面.支持集中化的网络状态控制.实现底层网络设施对上层应用的透明. SDN和NFV: O ...
- 从SDN鼻祖Nicira到VMware NSX 网络虚拟化平台的简单探讨
以前的大二层技术,一般是在物理网络底层使用IS-IS路由技术,再在此基础之上,实现数据中心网络的二层扩展,如公有的Trill.SPB技术和Cisco私有的OTV.Fabricpath技术:前沿一些的网 ...
- 传统二三层转发融合SDN Openflow协议的Hybrid交换机转发流程
Hybrid 交换系统(以下简称Hybrid 交换机)是交换机融合了OVS(Openflow vswitch)原生代码,集传统和Openflow 技术于一体的转发系统.主要解决纯Openflow 基于 ...
- Open vSwitch FAQ (三)
Quality of Service (QoS) Q: How do I configure Quality of Service (QoS)? A: Suppose that you want to ...
- ovs+dpdk numa感知特性验证
0.介绍 本测试是为了验证这篇文章中提到的DPDK的NUMA感知特性. 简单来说,在ovs+dpdk+qemu的环境中,一个虚拟机牵涉到的内存共有三部分: DPDK为vHost User设备分配的De ...
随机推荐
- IOS开发之Core Location
IOS 支持三种检测当前位置的方式:手机基站.Wi-Fi.和GPS,其中GPS是经度最高的,同时也是最耗费手机电量的.一般情况下在室内是无法通过GPS获 取位置信息的,通过Wi-Fi获取位置的原理是通 ...
- 【GMT43智能液晶模块】例程一:ARM驱动LED
实验原理: 通过STM32的一个GPIO驱动一个红色LED,GPIO为推挽输出模式,采用灌电流 方式与LED连接,基于STemWin人机界面通过按钮控制GPIO高.低电平输出,从而 控制LED亮灭. ...
- Spring Security 匿名认证
1.项目截图: 2.匿名认证配置: <?xml version="1.0" encoding="UTF-8"?> <beans xmlns=& ...
- [备份]EntityFramework
本视频和分步演练介绍通过 Code First 开发建立新数据库.这个方案包括建立不存在的数据库(Code First 创建)或者空数据库(Code First 向它添加新表).借助 Code Fir ...
- oracle学习笔记1(环境搭建)
学习的开始先剧透一下,本人有点笨,本来想用oracle vbox,装个red hat+oracle,但是虚拟机一直报错,0x00000000内存不能written.所以便想到其他的办法,刚好接触了go ...
- [Android] 基于 Linux 命令行构建 Android 应用(三):构建流程
Android 应用的构建过程就是将 Android 项目中的文件和资源进行编译和打包,最后将结果输出到 .apk 文件..apk 文件是保存二进制文件的容器,它包含了运行安卓应用所需的所有信息,例如 ...
- linux后台执行命令:&和nohup
当我们在终端或控制台工作时,可能不希望由于运行一个作业而占住了屏幕,因为可能还有更重要的事情要做,比如阅读电子邮件.对于密集访问磁盘的进程,我们更希望它能够在每天的非负荷高峰时间段运行(例如凌晨).为 ...
- 解决Maven build 慢的问题
extends:http://www.cnblogs.com/gmq-sh/p/4742698.html ,http://www.cnblogs.com/rainy-shurun/p/5726758. ...
- Hadoop学习之pig
首先明确pig是解决什么问题而出现的,pig是为了简化mapreduce编程而设计的,并且有自己的一套脚本语言.其基本由命令和操作符来定义的,如load,store,它的功能很明确,用来大规模处理数据 ...
- Jmeter压力测试工具安装及使用教程
一.Jmeter下载 进入官网:http://jmeter.apache.org/ 1.第一步进入官网如下图 2.选择进行下载,下载下来为一个压缩包,解压即可. 3.我下载的是jmeter4.0版本, ...