Centos kvm network error: Connection activation failed: Master connection not found or invalid
新装的系统需要做虚拟机，设置网卡为桥接模式重启网卡的时候报如下错误
networkmanager,error
Google了下才发现是 NetworkManager 的原因，因为装了桌面，所以NetworkManager接管了网卡启动，将NetworkManager停掉，并启动 network 服务来接管网卡服务：
root@localhost /# chkconfig NetworkManager off
root@localhost /# chkconfig –levels 35 network on
root@localhost /# service NetworkManager stop
[root@localhost network-scripts]# ls | grep ifcfg
ifcfg-em1
ifcfg-em2
ifcfg-em3
ifcfg-em4
ifcfg-lo
[root@localhost network-scripts]# cp -av ifcfg-em1 ifcfg-br0 #复制一个桥接的网卡配置文件
[root@localhost network-scripts]# vim ifcfg-em1
DEVICE=br0
TYPE=Bridge
BOOTPROTO=static
ONBOOT=yes
GATEWAY=10.10.0.1
IPADDR=10.10.0.100
NETMASK=255.255.255.0
DNS1=8.8.8.8
[root@localhost network-scripts]# vim ifcfg-br0
DEVICE=em1
BRIDGE=br0
HWADDR=00:2e:90:f3:f0:00
ONBOOT=yes
TYPE=Ethernet
IPV6INIT=no
USERCTL=no
[root@localhost network-scripts]# service network restart
如果还是不行的话，重启下系统就好了～ 🙂
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