在CentOS 7的安裝過程中如果有選擇相關(guān)虛擬化的的服務(wù)安裝系統(tǒng)后，啟動網(wǎng)卡時(shí)會發(fā)現(xiàn)有一個(gè)以網(wǎng)橋連接的私網(wǎng)地址的virbr0網(wǎng)卡，這個(gè)是因?yàn)樵谔摂M化中有使用到libvirtd服務(wù)生成的，如果不需要可以關(guān)閉后去掉：
一、查看IP及網(wǎng)橋設(shè)備
[root@etc ~]# ifconfig //查看IP地址
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
inet 192.168.133.121/24 brd 192.168.133.255 scope global ens33
valid_lft forever preferred_lft forever
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000
inet 192.168.120.1/24 brd 192.168.120.255 scope global virbr0
valid_lft forever preferred_lft forever
[root@etc ~]# brctl show //查看網(wǎng)橋
bridge name bridge id STP enabled interfaces
virbr0 8321.5254115cdv00 yes virbr0-nic
[root@etc ~]#
二、刪除網(wǎng)橋
[root@etc ~]# ifconfig virbr0 down
[root@etc ~]# brctl delbr virbr0 //刪除網(wǎng)橋
三、禁用開機(jī)服務(wù)
[root@etc ~]# systemctl disable libvirtd.service //禁用libvirtd服務(wù)開機(jī)自啟動
Removed symlink
/etc/systemd/system/multi-user.target.wants/libvirtd.service.
Removed symlink
/etc/systemd/system/sockets.target.wants/virtlockd.socket.
Removed symlink
/etc/systemd/system/sockets.target.wants/virtlogd.socket.
[root@etc ~]# systemctl mask libvirtd.service
Created symlink from
/etc/systemd/system/libvirtd.service to /dev/null.
再次使用ifconfig查看，即可發(fā)現(xiàn)virbr0不在了
[root@Node1 ~]# ifconfig
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
inet 192.168.133.121/24 brd 192.168.133.255 scope global ens33
valid_lft forever preferred_lft forever
當(dāng)然也可直接將libvirtd服務(wù)卸載，這樣也就不會生成虛擬網(wǎng)卡，更是一勞永逸，待需要使用時(shí)，再安裝該服務(wù)即可。操作命令如下：
yum remove libvirt-libs.x86_64