kvm 给虚机增加网卡

[root@666 ok]# virsh domiflist c03

Interface  Type       Source     Model       MAC

-------------------------------------------------------

vnet1      bridge     br0        rtl8139     52:54:00:cf:e1:a3

[root@666 ok]# virsh list

 Id    Name                           State

----------------------------------------------------

 1     c01                            running

 2     c03                            running

 3     c70                            running

临时增加网卡:

[root@666 ok]# virsh attach-interface c03 --type bridge --source br0

Interface attached successfully

查看:

[root@666 ok]# virsh domiflist c03

Interface  Type       Source     Model       MAC

-------------------------------------------------------

vnet1      bridge     br0        rtl8139     52:54:00:cf:e1:a3

vnet3      bridge     br0        rtl8139     52:54:00:7e:c2:6a

[root@c03 conf]# ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    inet 127.0.0.1/8 scope host lo

    inet6 ::1/128 scope host

       valid_lft forever preferred_lft forever

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

    link/ether 52:54:00:cf:e1:a3 brd ff:ff:ff:ff:ff:ff

    inet 10.100.0.61/24 brd 10.100.0.255 scope global eth0

    inet6 fe80::5054:ff:fecf:e1a3/64 scope link

       valid_lft forever preferred_lft forever

3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000

    link/ether 52:54:00:2b:9e:6c brd ff:ff:ff:ff:ff:ff

永久增加网卡:

命令行增加网卡只保存在内存中,重启就失效,所以要保存在配置文件中

[root@666 ok]# virsh dumpxml c03 >/etc/libvirt/qemu/c03.xml

[root@666 ok]# virsh define /etc/libvirt/qemu/c03.xml

Domain c03 defined from /etc/libvirt/qemu/c03.xml

重启虚机后再次查看网卡:

[root@c03 ~]# ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    inet 127.0.0.1/8 scope host lo

    inet6 ::1/128 scope host

       valid_lft forever preferred_lft forever

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

    link/ether 52:54:00:cf:e1:a3 brd ff:ff:ff:ff:ff:ff

    inet 10.100.0.61/24 brd 10.100.0.255 scope global eth0

    inet6 fe80::5054:ff:fecf:e1a3/64 scope link

       valid_lft forever preferred_lft forever

3: eth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000

    link/ether 52:54:00:7e:c2:6a brd ff:ff:ff:ff:ff:ff

增加并配置配置文件:

[root@c03 network-scripts]# cp ifcfg-eth0 ifcfg-eth2^C

[root@c03 network-scripts]# pwd

/etc/sysconfig/network-scripts

[root@c03 network-scripts]# cp ifcfg-eth0 ifcfg-eth2

配改MAC并查看:

  DEVICE=eth0                                                         |  DEVICE=eth2

  HWADDR=52:54:00:CF:E1:A3                                            |  HWADDR=52:54:00:7e:c2:6a

  TYPE=Ethernet                                                       |  TYPE=Ethernet

  UUID=4edbb7bf-e64f-402a-854c-ff259250c497                           |  #UUID=4edbb7bf-e64f-402a-854c-ff259250c497

  ONBOOT=yes                                                          |  ONBOOT=yes

  NM_CONTROLLED=yes                                                   |  NM_CONTROLLED=yes

  BOOTPROTO=dhcp                                                      |  BOOTPROTO=dhcp

查看IP

[root@c03 network-scripts]# ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    inet 127.0.0.1/8 scope host lo

    inet6 ::1/128 scope host

       valid_lft forever preferred_lft forever

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

    link/ether 52:54:00:cf:e1:a3 brd ff:ff:ff:ff:ff:ff

    inet 10.100.0.61/24 brd 10.100.0.255 scope global eth0

    inet6 fe80::5054:ff:fecf:e1a3/64 scope link

       valid_lft forever preferred_lft forever

3: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

    link/ether 52:54:00:7e:c2:6a brd ff:ff:ff:ff:ff:ff

    inet 10.100.0.58/24 brd 10.100.0.255 scope global eth2

    inet6 fe80::5054:ff:fe7e:c26a/64 scope link

       valid_lft forever preferred_lft forever

删除网卡命令:

# ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    inet 127.0.0.1/8 scope host lo

    inet6 ::1/128 scope host

       valid_lft forever preferred_lft forever

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

    link/ether 52:54:00:cf:e1:a3 brd ff:ff:ff:ff:ff:ff

    inet 10.100.0.61/24 brd 10.100.0.255 scope global eth0

    inet6 fe80::5054:ff:fecf:e1a3/64 scope link

       valid_lft forever preferred_lft forever

3: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

    link/ether 52:54:00:7e:c2:6a brd ff:ff:ff:ff:ff:ff

    inet 10.100.0.58/24 brd 10.100.0.255 scope global eth2

    inet6 fe80::5054:ff:fe7e:c26a/64 scope link

       valid_lft forever preferred_lft forever

[root@666 ok]# virsh detach-interface c03 --type bridge --mac 52:54:00:7e:c2:6a

Interface detached successfully

查看IP

# ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    inet 127.0.0.1/8 scope host lo

    inet6 ::1/128 scope host

       valid_lft forever preferred_lft forever

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

    link/ether 52:54:00:cf:e1:a3 brd ff:ff:ff:ff:ff:ff

    inet 10.100.0.61/24 brd 10.100.0.255 scope global eth0

    inet6 fe80::5054:ff:fecf:e1a3/64 scope link

       valid_lft forever preferred_lft forever

再次保存配置文件:

[root@666 ok]# virsh dumpxml c03 >/etc/libvirt/qemu/c03.xml

[root@666 ok]# virsh define /etc/libvirt/qemu/c03.xml

Domain c03 defined from /etc/libvirt/qemu/c03.xml

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