Centos7下删除virbr0网卡信息的方法

删除自己不想要的网卡配置信息

[root@centos7 ~]# ifconfig 
ens33: flags=4163  mtu 1500
        inet 192.168.137.20  netmask 255.255.255.0  broadcast 192.168.137.255
        inet6 fe80::917b:8064:5076:5abb  prefixlen 64  scopeid 0x20
        ether 00:0c:29:32:50:0e  txqueuelen 1000  (Ethernet)
        RX packets 10511  bytes 14992536 (14.2 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 4377  bytes 301300 (294.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10
        loop  txqueuelen 1000  (Local Loopback)
        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

virbr0: flags=4099  mtu 1500
        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
        ether 52:54:00:6c:c5:86  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

查看网络列表 

[root@centos7 network-scripts]# virsh net-destroy default
bash: virsh: 未找到命令...

下载下面两个包
[root@centos7 ~]# yum install libguestfs-tools
[root@centos7 ~]# yum install virt-install.noarch

[root@centos7 network-scripts]# virsh net-list
 名称               状态     自动开始  持久
----------------------------------------------------------
 default              活动     是           是

删除网桥

[root@centos7 ~]# ifconfig virbr0 down

[root@centos7 ~]# virsh net-destroy default
网络 default 被删除

从配置文件中剔除 

[root@centos7 ~]# virsh net-undefine default
网络 default 已经被取消定义

重新启动libvirtd服务

[root@centos7 ~]# systemctl restart libvirtd

[root@centos7 ~]# systemctl status libvirtd
● libvirtd.service - Virtualization daemon
   Loaded: loaded (/usr/lib/systemd/system/libvirtd.service; disabled; vendor preset: enabled)
   Active: active (running) since 二 2019-08-06 16:41:59 CST; 13s ago
     Docs: man:libvirtd(8)
           https://libvirt.org
 Main PID: 20828 (libvirtd)
    Tasks: 19 (limit: 32768)
   CGroup: /system.slice/libvirtd.service
           ├─ 8670 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf...
           ├─ 8673 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf...
           └─20828 /usr/sbin/libvirtd

8月 06 16:41:59 centos7.6 systemd[1]: Starting Virtualization daemon...
8月 06 16:41:59 centos7.6 systemd[1]: Started Virtualization daemon.
8月 06 16:42:08 centos7.6 dnsmasq[8670]: no servers found in /etc/resolv.conf, will...ry
8月 06 16:42:08 centos7.6 dnsmasq[8670]: reading /etc/resolv.conf
8月 06 16:42:08 centos7.6 dnsmasq[8670]: using nameserver 192.168.137.254#53
Hint: Some lines were ellipsized, use -l to show in full.
[root@centos7 ~]# systemctl enable libvirtd
Created symlink from /etc/systemd/system/multi-user.target.wants/libvirtd.service to /usr/lib/systemd/system/libvirtd.service.
Created symlink from /etc/systemd/system/sockets.target.wants/virtlockd.socket to /usr/lib/systemd/system/virtlockd.socket.
Created symlink from /etc/systemd/system/sockets.target.wants/virtlogd.socket to /usr/lib/systemd/system/virtlogd.socket.

再次查看IP列表

[root@centos7 ~]# virsh net-list
 名称               状态     自动开始  持久
----------------------------------------------------------

[root@centos7 ~]# ifconfig 
ens33: flags=4163  mtu 1500
        inet 192.168.137.20  netmask 255.255.255.0  broadcast 192.168.137.255
        inet6 fe80::917b:8064:5076:5abb  prefixlen 64  scopeid 0x20
        ether 00:0c:29:32:50:0e  txqueuelen 1000  (Ethernet)
        RX packets 273612  bytes 405730639 (386.9 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 61249  bytes 3998767 (3.8 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10
        loop  txqueuelen 1000  (Local Loopback)
        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

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