您现在的位置是:首页 >技术交流 >KVM网络管理-创建桥接网络网站首页技术交流
KVM网络管理-创建桥接网络
简介KVM网络管理-创建桥接网络
KVM网络管理-创建桥接网络
分类
网络:
-
nat
-
isolated
接口:
- bridge
虚拟交换机:
-
linux-bridge(linux)
-
ovs(open-Vswitch)
NAT网络拓扑图
仅主机模式网络拓扑图
桥接模式网络拓扑图
在Linux主机上开启vm1,从交换机上把vnet网卡删除
首先查看虚拟交换机
[root@myserver ~]# brctl show
bridge name bridge id STP enabled interfaces
virbr0 8000.5254000760f5 yes virbr0-nic
vnet0
测试vm1能否ping通外网
删除网卡
[root@myserver ~]# brctl delif virbr0 vnet0
[root@myserver ~]# brctl show
bridge name bridge id STP enabled interfaces
virbr0 8000.5254000760f5 yes virbr0-nic
去虚拟机vm1里查看能否ping通
把vnet0添加到virbr0交换机里,虚拟机vm1能否ping通?
[root@myserver ~]# brctl addif virbr0 vnet0
[root@myserver ~]# brctl show
bridge name bridge id STP enabled interfaces
virbr0 8000.5254000760f5 yes virbr0-nic
vnet0
配置文件方式配置桥接
在操作之前关闭GuestOS主机
查看宿主机IP地址
[root@myserver ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:8c:e3:7a brd ff:ff:ff:ff:ff:ff
inet 192.168.10.126/24 brd 192.168.10.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
inet6 fe80::1327:e13c:8386:825b/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 52:54:00:07:60:f5 brd ff:ff:ff:ff:ff:ff
inet 192.168.124.1/24 brd 192.168.124.255 scope global virbr0
valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000
link/ether 52:54:00:07:60:f5 brd ff:ff:ff:ff:ff:ff
进入存放网卡配置文件的目录中
[root@myserver ~]# cd /etc/sysconfig/network-scripts/
[root@myserver network-scripts]# ls
ifcfg-ens33 ifdown-ib ifdown-ppp ifdown-tunnel ifup-ib ifup-plusb ifup-Team network-functions
ifcfg-lo ifdown-ippp ifdown-routes ifup ifup-ippp ifup-post ifup-TeamPort network-functions-ipv6
ifdown ifdown-ipv6 ifdown-sit ifup-aliases ifup-ipv6 ifup-ppp ifup-tunnel
ifdown-bnep ifdown-isdn ifdown-Team ifup-bnep ifup-isdn ifup-routes ifup-wireless
ifdown-eth ifdown-post ifdown-TeamPort ifup-eth ifup-plip ifup-sit init.ipv6-global
首先确认IP地址,使用route查看网关
[root@myserver ~]# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default gateway 0.0.0.0 UG 100 0 0 ens33
192.168.10.0 0.0.0.0 255.255.255.0 U 100 0 0 ens33
192.168.124.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0
[root@myserver ~]# ip route show default
default via 192.168.10.2 dev ens33 proto static metric 100
192.168.10.0/24 dev ens33 proto kernel scope link src 192.168.10.126 metric 100
192.168.124.0/24 dev virbr0 proto kernel scope link src 192.168.124.1
[root@myserver network-scripts]# vim ifcfg-br0
[root@myserver network-scripts]# cat ifcfg-br0
TYPE=Bridge
NAME=br0
DEVICE=br0
ONBOOT="yes"
BOOTPROTO=static
IPADDR=192.168.10.126 #宿主机IP地址
GATEWAY=192.168.10.2 #默认网关
NETMASK=255.255.255.0
DNS1=114.114.114.114
DNS2=8.8.8.8
修改物理机网卡配置文件,首先备份信息
[root@myserver network-scripts]# cp ifcfg-ens33 ifcfg-ens33.bak
[root@myserver network-scripts]# ls
ifcfg-br0 ifdown-bnep ifdown-isdn ifdown-Team ifup-bnep ifup-isdn ifup-routes ifup-wireless
ifcfg-ens33 ifdown-eth ifdown-post ifdown-TeamPort ifup-eth ifup-plip ifup-sit init.ipv6-global
ifcfg-ens33.bak ifdown-ib ifdown-ppp ifdown-tunnel ifup-ib ifup-plusb ifup-Team network-functions
ifcfg-lo ifdown-ippp ifdown-routes ifup ifup-ippp ifup-post ifup-TeamPort network-functions-ipv6
ifdown ifdown-ipv6 ifdown-sit ifup-aliases ifup-ipv6 ifup-ppp ifup-tunnel
[root@myserver network-scripts]# vim ifcfg-ens33
[root@myserver network-scripts]# cat ifcfg-ens33
DEVICE="ens33"
ONBOOT="yes"
BRIDGE=br0 #将物理网卡桥接到桥接网卡br0
重启服务
systemctl restart libvirtd
systemctl restart network
在vm1添加网卡,运行vm1
查看vm1网卡
网卡与宿主机在同一网段
查看宿主机网卡
[root@myserver network-scripts]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br0 state UP group default qlen 1000
link/ether 00:0c:29:8c:e3:7a brd ff:ff:ff:ff:ff:ff
3: virbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 52:54:00:07:60:f5 brd ff:ff:ff:ff:ff:ff
inet 192.168.124.1/24 brd 192.168.124.255 scope global virbr0
valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000
link/ether 52:54:00:07:60:f5 brd ff:ff:ff:ff:ff:ff
5: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 00:0c:29:8c:e3:7a brd ff:ff:ff:ff:ff:ff
inet 192.168.10.126/24 brd 192.168.10.255 scope global noprefixroute br0
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe8c:e37a/64 scope link
valid_lft forever preferred_lft forever
6: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master virbr0 state UNKNOWN group default qlen 1000
link/ether fe:54:00:26:47:ff brd ff:ff:ff:ff:ff:ff
inet6 fe80::fc54:ff:fe26:47ff/64 scope link
valid_lft forever preferred_lft forever
7: vnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br0 state UNKNOWN group default qlen 1000
link/ether fe:54:00:b0:f4:8f brd ff:ff:ff:ff:ff:ff
inet6 fe80::fc54:ff:feb0:f48f/64 scope link
valid_lft forever preferred_lft forever
同时桥接之后虚拟机vm1可以通过外部SSH链接
移除网卡
对vm1进行移除网卡
宿主机操作
[root@myserver network-scripts]# rm -rf ifcfg-br0
[root@myserver network-scripts]# rm -rf ifcfg-ens33
[root@myserver network-scripts]# mv ifcfg-ens33.bak ifcfg-ens33
[root@myserver network-scripts]# ls
ifcfg-ens33 ifdown-ib ifdown-ppp ifdown-tunnel ifup-ib ifup-plusb ifup-Team network-functions
ifcfg-lo ifdown-ippp ifdown-routes ifup ifup-ippp ifup-post ifup-TeamPort network-functions-ipv6
ifdown ifdown-ipv6 ifdown-sit ifup-aliases ifup-ipv6 ifup-ppp ifup-tunnel
ifdown-bnep ifdown-isdn ifdown-Team ifup-bnep ifup-isdn ifup-routes ifup-wireless
ifdown-eth ifdown-post ifdown-TeamPort ifup-eth ifup-plip ifup-sit init.ipv6-global
[root@myserver network-scripts]# systemctl restart libvirtd
[root@myserver network-scripts]# systemctl restart network
查看宿主机网络信息,测试
[root@myserver ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:8c:e3:7a brd ff:ff:ff:ff:ff:ff
inet 192.168.10.126/24 brd 192.168.10.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
inet6 fe80::1327:e13c:8386:825b/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 52:54:00:07:60:f5 brd ff:ff:ff:ff:ff:ff
inet 192.168.124.1/24 brd 192.168.124.255 scope global virbr0
valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000
link/ether 52:54:00:07:60:f5 brd ff:ff:ff:ff:ff:ff
[root@myserver ~]# ping www.baidu.com
PING www.a.shifen.com (110.242.68.3) 56(84) bytes of data.
64 bytes from 110.242.68.3 (110.242.68.3): icmp_seq=1 ttl=128 time=32.3 ms
64 bytes from 110.242.68.3 (110.242.68.3): icmp_seq=2 ttl=128 time=36.3 ms
64 bytes from 110.242.68.3 (110.242.68.3): icmp_seq=3 ttl=128 time=32.8 ms
^C
--- www.a.shifen.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2004ms
rtt min/avg/max/mdev = 32.303/33.849/36.376/1.801 ms
风语者!平时喜欢研究各种技术,目前在从事后端开发工作,热爱生活、热爱工作。