KVM虚拟机如何连接网络

KVM虚拟机如何连接网络

https://www.cnblogs.com/yinzhengjie/p/18107529
参考

        1.关掉NetworkMnagaer，firewalld服务，否则可能会出现断网的情况
[root@yinzhengjie-kvm189 ~]# systemctl disable --now NetworkManager firewalld

        2.禁用selinux
[root@yinzhengjie-kvm189 ~]# sed -i '/SELINUX=/s#enforcing#disabled#g' /etc/selinux/config
[root@yinzhengjie-kvm189 ~]#
[root@yinzhengjie-kvm189 ~]# setenforce 0
[root@yinzhengjie-kvm189 ~]#
[root@yinzhengjie-kvm189 ~]# getenforce
Permissive
[root@yinzhengjie-kvm189 ~]#

        3.修改网卡的配置文件，配置好静态IP
[root@yinzhengjie-kvm189 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
TYPE=Ethernet
BOOTPROTO=static
NAME=eth0
DEVICE=eth0
ONBOOT=yes
IPADDR=10.0.0.189
NETMASK=255.255.255.0
GATEWAY=10.0.0.254
DNS1=223.5.5.5
DNS2=223.6.6.6
[root@yinzhengjie-kvm189 ~]#
[root@yinzhengjie-kvm189 ~]#
[root@yinzhengjie-kvm189 ~]# systemctl restart network
[root@yinzhengjie-kvm189 ~]#

        4.创建桥接网卡
[root@yinzhengjie-kvm189 ~]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.0.0.189  netmask 255.255.255.0  broadcast 10.0.0.255
        inet6 fe80::20c:29ff:feaa:4063  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:aa:40:63  txqueuelen 1000  (Ethernet)
        RX packets 831  bytes 65414 (63.8 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 526  bytes 70060 (68.4 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 48  bytes 4080 (3.9 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 48  bytes 4080 (3.9 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
        ether 52:54:00:ab:b3:6e  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@yinzhengjie-kvm189 ~]#
[root@yinzhengjie-kvm189 ~]#
[root@yinzhengjie-kvm189 ~]# virsh iface-bridge eth0 br0  # 创建桥接前观察eth0的网卡地址。
Created bridge br0 with attached device eth0
Bridge interface br0 started

[root@yinzhengjie-kvm189 ~]#
[root@yinzhengjie-kvm189 ~]# brctl show
bridge name        bridge id                STP enabled        interfaces
br0                        8000.000c29aa4063        yes                eth0
virbr0                8000.525400abb36e        yes                virbr0-nic
[root@yinzhengjie-kvm189 ~]#


        5.桥接成功后多出了br0网卡且eth0网卡的IP地址转移到br0上去了
[root@yinzhengjie-kvm189 ~]# ifconfig
br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.0.0.189  netmask 255.255.255.0  broadcast 10.0.0.255
        inet6 fe80::20c:29ff:feaa:4063  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:aa:40:63  txqueuelen 1000  (Ethernet)
        RX packets 10  bytes 596 (596.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 33  bytes 4837 (4.7 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 00:0c:29:aa:40:63  txqueuelen 1000  (Ethernet)
        RX packets 859  bytes 67412 (65.8 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 577  bytes 78059 (76.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 48  bytes 4080 (3.9 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 48  bytes 4080 (3.9 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
        ether 52:54:00:ab:b3:6e  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@yinzhengjie-kvm189 ~]#


参考

https://blog.csdn.net/gggauss/article/details/109611731
参考