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由于centos 7较之前的版本有了很大的变化，目前测试了centos 7 环境下kvm的安装与搭建，具体如下。 一、安装kvm 软件 由于之前已做过较详细的 kvm 的安装与总结，这里只大致列下步骤：
注：centos7上服务的管理方式换成了systemctl 二、配置网卡桥接 centos7上默认已不再是eth0、eth1 ，我的pc server上安装好的第一块网卡变成了enp3s0 ，修改步骤和centos 6上没有区别，如下 [root@itnetcn ~]# cd /etc/sysconfig/network-scripts/ [root@itnetcn network-scripts]# cat ifcfg-br0
[root@itnetcn network-scripts]# cat ifcfg-enp3s0
[root@itnetcn ~]reboot [root@itnetcn network-scripts]# ifconfig br0: flags=4163 mtu 1500 inet 192.168.0.102 netmask 255.255.255.0 broadcast 192.168.0.255 inet6 fe80::7a24:afff:fe46:ca60 prefixlen 64 scopeid 0x20 ether 78:24:af:46:ca:60 txqueuelen 0 (Ethernet) RX packets 129 bytes 14676 (14.3 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 148 bytes 21994 (21.4 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 enp3s0: flags=4163 mtu 1500 ether 78:24:af:46:ca:60 txqueuelen 1000 (Ethernet) RX packets 129 bytes 16482 (16.0 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 148 bytes 21994 (21.4 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 0 (Local Loopback) RX packets 9 bytes 728 (728.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 9 bytes 728 (728.0 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 a6:88:9f:14:b2:66 txqueuelen 0 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 1 bytes 90 (90.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 [root@itnetcn network-scripts]# ip add show 1: lo: 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 valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp3s0: mtu 1500 qdisc pfifo_fast master br0 state UP qlen 1000 link/ether 78:24:af:46:ca:60 brd ff:ff:ff:ff:ff:ff 3: br0: mtu 1500 qdisc noqueue state UP link/ether 78:24:af:46:ca:60 brd ff:ff:ff:ff:ff:ff inet 192.168.0.102/24 brd 192.168.0.255 scope global br0 valid_lft forever preferred_lft forever inet6 fe80::7a24:afff:fe46:ca60/64 scope link valid_lft forever preferred_lft forever 4: virbr0: mtu 1500 qdisc noqueue state DOWN link/ether a6:88:9f:14:b2:66 brd ff:ff:ff:ff:ff:ff inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0 valid_lft forever preferred_lft forever
注：由于ip 命令属于iproute2软件包中的工具，由于代替旧的ifconfig命令，尽可能的习惯使用新的命令和工具包来淘汰老的软件和工具。 三、linux下selinux防火墙关闭
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