Open vSwitch使用笔记

[root@localhost~]#ovs-brcompatd--pidfile--detach

$apt-getinstallopenvswitch-*

#!/bin/bash#./configure--with-l26=/lib/modules/`uname-r`/build#echo"closeapplicationsormodulesdependingonbridge.ko"#ifserviceiptablesstatus|greprunning>/dev/null2>&1;then#/etc/init.d/iptablesstop;#fi#iflsmod|grepxt_physdev>/dev/null2>&1;then#rmmodxt_physdev;#fiecho"removemodulebridge"iflsmod|grepbridge>/dev/null2>&1;thenifrmmodbridge>/dev/null2>&1;thenecho"bridge.koremoved">/dev/nullelseecho"Failedtoremovekernelmodulebridge"exitfifiecho"cleanobsoletesocketfilesin/var/run/openvswitch/"foriin`ls/var/run/openvswitch/|grep"ctl$"`;dorm-f/var/run/openvswitch/$i;doneecho"insertkernelmoduleopenvswitch_mod.ko"iflsmod|grepbridge>/dev/null2>&1;thenecho"bridgeisalreadyrunning">/dev/null;eliflsmod|grepopenvswitch_mod>/dev/null2>&1;thenecho"moduleopenvswitch_modexist"elseifinsmod、、/var/lib/dkms/openvswitch/1.4.0/3.2.0-30\-generic/x86_64/module/openvswitch_mod.ko;thenecho"openvswitch_mod.koinserted";elseecho"failedtoinsertopenvswitch_mod.ko";exitfifi#firstusethiswheninstallovsdb-toolcreate/usr/local/etc/ovs-vswitchd.conf.db\/var/lib/dkms/openvswitch/1.4.0/build/vswitchd/vswitch.ovsschema#beforestartingovs-vswitchd,woneedtostartitsconfigdatabaseecho"startdaemonovsdb-server"ifps-ef|grep-E"[[:digit:]][[:space:]]+ovsdb-server">/dev/null2>&1;thenecho"ovsdb-serverisalreadyrunning">/dev/null;elseovsdb-server"/usr/local/etc/ovs-vswitchd.conf.db"--remote=punix:/var/run/openvswitch/db.sock--remote=db:Open_vSwitch,manager_options--private-key=db:SSL,private_key--certificate=db:SSL,certificate--bootstrap-ca-cert=db:SSL,ca_cert--detach;fi#initializethedbovs-vsctl--no-waitinit#startvswitchitselfecho"startdaemonovs-vswitchd"ifps-ef|grep-E"[[:digit:]][[:space:]]+ovs-vswitchd">/dev/null2>&1;thenecho"ovs-vswitchdisalreadyrunning">/dev/null;elseovs-vswitchdunix:/var/run/openvswitch/db.sock--detach;fi#echo"startdaemonovs-brcompatd"iflsmod|grepbrcompat_mod>/dev/null2>&1;thenecho"moduleovs-brcompatdexist"elseifinsmod/var/lib/dkms/openvswitch/1.4.0/3.2.0-30-generic/x86_64/module/brcompat_mod.ko;thenecho"moduleovs-brcomptdinserted"elseecho"failedtoinsertmoduleovs-brcomptd"exitfifiovs-brcompatd--pidfile--detach#-vANY:console:EMERunix:/usr/local/var/run/openvswitch/db.sock;echo"addandconfigurebridgeovsbr0"ifovs-vsctllist-br|grepovsbr0>/dev/null2>&1;thenecho"bridgeovsbr0alreadyexists">/dev/nullelseovs-vsctladd-brovsbr0fiifconfigovsbr0up#ifconfigovsbr0172.16.18.230/16#echo"attachallinterfacestobridgeovsbr0"#if/usr/sbin/brctlshow|greppeth0>/dev/null2>&1;then#echo"peth0isadded">/dev/null;#else#ovs-vsctladd-portxenbr0peth0>/dev/null2>&1;#foriin`ifconfig|grepvif|awk'{print$1}'`;#do#ovs-vsctladd-portovsbr0$i>/dev/null2>&1;#done#fi#echo"OpenvSwitchstartedsuccessfully"#ovs-vsctladd-portxenbr0peth0/etc/init.d/networkingrestart

#!/bin/shkill`cd/var/run/openvswitch&&catovs-brcompatd.pidovsdb-server.pidovs-vswitchd.pidovs-controller.pidovs-monitor-ipsec.pid`

...<interfacetype='network'><macaddress='52:54:00:71:b1:b6'/><sourcenetwork='default'/><addresstype='pci'domain='0x0000'bus='0x00'slot='0x03'function='0x0'/></interface>...

...<interfacetype='bridge'><macaddress='52:54:00:71:b1:b6'/><sourcebridge='ovsbr'/><virtualporttype='openvswitch'/><addresstype='pci'domain='0x0000'bus='0x00'slot='0x03'function='0x0'/></interface>...

3.配置

看看官方给出的解释：http://openvswitch.org/cgi-bin/gitweb.cgi?p=openvswitch;a=blob_plain;f=INSTALL.bridge;hb=HEAD

ThisfiledocumentshowOpenvSwitchmaybeusedasadrop-in

replacementforaLinuxkernelbridgeinanenvironmentthatincludes

elementsthataretightlytiedtotheLinuxbridgetools

(e.g."brctl")andarchitecture.Werecommenddirectlyusingthe

managementtoolsprovidedwithOpenvSwitchratherthanthese

compatibilityhooksforenvironmentsthatarenottightlytiedtothe

Linuxbridgingtools;theyaremoreefficientandbetterreflectthe

actualoperationandstatus.。。。。

/*file_operations结构体，将正常的文件操作对应于tun相应的函数，这样可以像操作文件一样操作tun*/staticstructfile_operationstun_fops={owner:THIS_MODULE,llseek:tun_chr_lseek,read:tun_chr_read,write:tun_chr_write,poll:tun_chr_poll,ioctl:tun_chr_ioctl,open:tun_chr_open,release:tun_chr_close,fasync:tun_chr_fasync};staticstructmiscdevicetun_miscdev={TUN_MINOR,"net/tun",&tun_fops};/*c语言中的__init保证该函数只执行一次*/int__inittun_init(void){printk(KERN_INFO"UniversalTUN/TAPdevicedriver%s""(C)1999-2000MaximKrasnyansky\n",TUN_VER);if(misc_register(&tun_miscdev)){printk(KERN_ERR"tun:Can'tregistermiscdevice%d\n",TUN_MINOR);return-EIO;}return0;}voidtun_cleanup(void){misc_deregister(&tun_miscdev);}/*加载tun模块*/module_init(tun_init);module_exit(tun_cleanup);

#include<stdio.h>#include<fcntl.h>#include<unistd.h>#include<sys/time.h>#include<sys/types.h>#include<linux/if_tun.h>#definemax(a,b)((a)>(b)?(a):(b))intmain(intargc,char*argv[]){charbuf[1600];intf1,f2,l,fm;fd_setfds;if(argc<2){printf("Usage:bridgetap|tun\n");exit(1);}sprintf(buf,"/dev/%s%d",argv[1],0);f1=open(buf,O_RDWR);sprintf(buf,"/dev/%s%d",argv[1],1);f2=open(buf,O_RDWR);fm=max(f1,f2)+1;ioctl(f1,TUNSETNOCSUM,1);ioctl(f2,TUNSETNOCSUM,1);while(1){FD_ZERO(&fds);FD_SET(f1,&fds);FD_SET(f2,&fds);select(fm,&fds,NULL,NULL,NULL);if(FD_ISSET(f1,&fds)){l=read(f1,buf,sizeof(buf));write(f2,buf,l);}if(FD_ISSET(f2,&fds)){l=read(f2,buf,sizeof(buf));write(f1,buf,l);}}}

mkdir/dev/net
mknod/dev/net/tunc10200

ovs-vsctladd-brbr0
ovs-vsctlsetbridgebr0datapath_type=netdev
ovs-vsctladd-portbr0eth0
ovs-vsctladd-portbr0eth1
ovs-vsctladd-portbr0eth2
ovs-vswitchd