KVM之十：虚拟机在线添加网卡

1、查看原有网卡信息

#virsh domiflist snale
Interface  Type       Source     Model       MAC
-------------------------------------------------------
vnet0      bridge     br0        virtio      :::8c:b8:

2、临时添加新网卡

#virsh attach-interface snale --type bridge --source br0
成功附加接口

永久添加网卡命令

#virsh attach-interface snale --type bridge --source br0  --config

3、查看

#virsh domiflist snale
Interface  Type       Source     Model       MAC
-------------------------------------------------------
vnet0      bridge     br0        virtio      :::8c:b8:
vnet1      bridge     br0        -           :::::cf

#ip a
: lo: <LOOPBACK,UP,LOWER_UP> mtu  qdisc noqueue state UNKNOWN
    link/loopback ::::: brd :::::
    inet 127.0.0.1/ scope host lo
    inet6 ::/ scope host
       valid_lft forever preferred_lft forever
: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu  qdisc pfifo_fast state UP qlen
    link/ether :::8c:b8: brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.23/ brd 192.168.0.255 scope global eth0
    inet6 fe80:::ff:fe8c:b860/ scope link
       valid_lft forever preferred_lft forever
: eth1: <BROADCAST,MULTICAST> mtu  qdisc noop state DOWN qlen
    link/ether :::::cf brd ff:ff:ff:ff:ff:ff

4、命令行增加的网卡只保存在内存中，重启就失效，所以需要保存到配置文件中

#virsh dumpxml snale >/etc/libvirt/qemu/snale.xml 
#virsh define /etc/libvirt/qemu/snale.xml 

删除网卡命令

#virsh detach-interface snale  --type bridge --mac  :::::cf
成功分离接口

再重新保存配置