Build Vxlan with Linux Bridge to enable virtual machines to communicate across physical machines

#实验环境:

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#本次实验要让192.168.1.3 ping through 192.168.1.2 across physical nodes

#两台物理机:

Kvm_1	192.168.174.134
Kvm_2	192.168.174.135

#在KVM_1主机上操作

#安装KVM相关软件

[[Email protected]_1 ~]# yum-y install QEMU-KVM libvirt virt-install bridge-utils

[Email protected]_1 ~]# systemctl start Libvirtd.service

[Email protected]_1 ~]# brctl ADDBR br-vx #创建网桥

[[Email protected]_1 ~]# IP link set br-vx up #启动网桥

[[Email protected]_1 ~]# IP link add vxlan10 type Vxlan ID ' remote 192.168.174.135 dstport 4789 Dev eno33554960

#创建vxlan隧道 remote address dstport as remote port dev for local physical egress

[[Email protected]_1 ~]# IP link set vxlan10 up #开启隧道

[Email protected]_1 ~]# brctl addif br-vx vxlan10 #将隧道加入网桥

#在KVM_2主机上操作

#安装KVM相关软件

[[Email protected]_2 ~]# yum-y install QEMU-KVM libvirt virt-install bridge-utils

[Email protected]_2 ~]# systemctl start Libvirtd.service

[Email protected]_2 ~]# brctl ADDBR br-vx #创建网桥

[[Email protected]_2 ~]# IP link set br-vx up #启动网桥

[[Email protected]_2 ~]# IP link add vxlan10 type Vxlan ID ' remote 192.168.174.134 dstport 4789 Dev eno16777736

#创建vxlan隧道 remote address dstport as remote port dev for local physical egress

[[Email protected]_2 ~]# IP link set vxlan10 up #开启隧道

[Email protected]_2 ~]# brctl addif br-vx vxlan10 #将隧道加入网桥

#创建虚拟机 here is a cirros mirror.

[Email protected]_1 ~]# virt-install--name=vm4--network bridge=br-vx--graphics vnc,listen=0.0.0.0--noautoconsole-- ram=512--vcpus=1--boot HD--disk path=/opt/cirros-0.3.4-x86_64-disk.img

[[Email protected]_1 ~]# Brctl Show

Bridge nameBridge IDSTP enabledinterfaces

BR-VX8000.265a5b09d49enovnet0

Vxlan10

Virbr08000.52540057b868Yesvirbr0-nic

[Email protected]_2 ~]# virt-install--name=vm4--network bridge=br-vx--graphics vnc,listen=0.0.0.0--noautoconsol E--ram=512--vcpus=1--boot HD--disk path=/opt/cirros-0.3.4-x86_64-disk.img

[[Email protected]_2 ~]# Brctl Show

Bridge name Bridge ID STP enabled interfaces

BR-VX 8000.e6d9912583a0 no vnet0

Vxlan10

Virbr0 8000.5254006a8c44 Yes virbr0-nic

#创建虚拟机时 Network chooses to connect to the BR-VX instead of the default network (VIRBR0)

#用VNC连接到虚拟机

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#由于我们没有搭建DHCP so you need to set the IP address manually

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#重启

#KVM_2上的虚拟机进行相同的操作

#测试 192.168.1.3 Ping the virtual machine on another physical machine 192.168.1.2

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#注意: Since we are using commands to configure, the physical machine will not be restarted.

# So here's the configuration file for BR-VX

[Email protected]_2 ~]# CAT/ETC/SYSCONFIG/NETWORK-SCRIPTS/IFCFG-BR-VX

Device=br-vx

Stp=no

Type=bridge

Bootproto=none

Defroute=yes

Ipv4_failure_fatal=no

Ipv6init=yes

Ipv6_autoconf=no

Ipv6_defroute=yes

Ipv6_failure_fatal=no

Name=br-vx

Uuid=8fc90c0c-81b9-496c-b25f-de6e8a206bf9

Onboot=yes

ipaddr=192.168.1.1 #这里的IP地址是网桥的IP地址, convenient to do DHCP

Prefix=24

This article is from the "Chauncey" blog, make sure to keep this source http://cqwujiang.blog.51cto.com/10808946/1914123

Build Vxlan with Linux Bridge to enable virtual machines to communicate across physical machines