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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：
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[root@361way ~]# yum -y install qemu-kvm libvirt virt-install bridge-utils
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[root@361way ~]# lsmod | grep kvm # make sure modules are loaded
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kvm 441119 0
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[root@361way ~]# systemctl start libvirtd
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[root@361way ~]# systemctl enable libvirtd
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
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[root@361way ~]# cd /etc/sysconfig/network-scripts/
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[root@361way network-scripts]# cat ifcfg-br0
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TYPE=Bridge
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BOOTPROTO=none
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DEVICE=br0
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ONBOOT=yes
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IPADDR0=192.168.0.102
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PREFIX0=24
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GATEWAY0=192.168.0.1
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[root@361way network-scripts]# cat ifcfg-enp3s0
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DEVICE=enp3s0
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TYPE=Ethernet
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ONBOOT=yes
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BRIDGE=br0
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[root@361way ~]reboot
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[root@361way network-scripts]# ifconfig
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br0: flags=4163 mtu 1500
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inet 192.168.0.102 netmask 255.255.255.0 broadcast 192.168.0.255
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inet6 fe80::7a24:afff:fe46:ca60 prefixlen 64 scopeid 0x20
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ether 78:24:af:46:ca:60 txqueuelen 0 (Ethernet)
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RX packets 129 bytes 14676 (14.3 KiB)
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RX errors 0 dropped 0 overruns 0 frame 0
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TX packets 148 bytes 21994 (21.4 KiB)
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TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
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enp3s0: flags=4163 mtu 1500
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ether 78:24:af:46:ca:60 txqueuelen 1000 (Ethernet)
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RX packets 129 bytes 16482 (16.0 KiB)
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RX errors 0 dropped 0 overruns 0 frame 0
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TX packets 148 bytes 21994 (21.4 KiB)
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TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
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lo: flags=73 mtu 65536
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inet 127.0.0.1 netmask 255.0.0.0
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inet6 ::1 prefixlen 128 scopeid 0x10
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loop txqueuelen 0 (Local Loopback)
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RX packets 9 bytes 728 (728.0 B)
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RX errors 0 dropped 0 overruns 0 frame 0
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TX packets 9 bytes 728 (728.0 B)
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TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
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virbr0: flags=4099 mtu 1500
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inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255
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ether a6:88:9f:14:b2:66 txqueuelen 0 (Ethernet)
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RX packets 0 bytes 0 (0.0 B)
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RX errors 0 dropped 0 overruns 0 frame 0
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TX packets 1 bytes 90 (90.0 B)
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TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
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[root@361way network-scripts]# ip add show
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1: lo: mtu 65536 qdisc noqueue state UNKNOWN
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link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
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inet 127.0.0.1/8 scope host lo
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valid_lft forever preferred_lft forever
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inet6 ::1/128 scope host
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valid_lft forever preferred_lft forever
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2: enp3s0: mtu 1500 qdisc pfifo_fast master br0 state UP qlen 1000
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link/ether 78:24:af:46:ca:60 brd ff:ff:ff:ff:ff:ff
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3: br0: mtu 1500 qdisc noqueue state UP
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link/ether 78:24:af:46:ca:60 brd ff:ff:ff:ff:ff:ff
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inet 192.168.0.102/24 brd 192.168.0.255 scope global br0
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valid_lft forever preferred_lft forever
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inet6 fe80::7a24:afff:fe46:ca60/64 scope link
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valid_lft forever preferred_lft forever
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4: virbr0: mtu 1500 qdisc noqueue state DOWN
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link/ether a6:88:9f:14:b2:66 brd ff:ff:ff:ff:ff:ff
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inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
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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、selinux防火墙关闭
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# setenforce 0
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# sed -i 's/=enforcing/=disabled/g' /etc/selinux/config
(责任编辑：IT) |
