centos 7系统如何安装配置kvm软件

来源：本站整理作者：梦在深巷时间：2016-07-24 02:59:57

在centos 6 环境下KVM的安装部分，我写过kvm虚拟化小结（一）kvm环境安装。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：

代码如下	复制代码
[root@361way ~]# yum -y install qemu-kvm libvirt virt-install bridge-utils [root@361way ~]# lsmod \| grep kvm # make sure modules are loaded kvm 441119 0 [root@361way ~]# systemctl start libvirtd [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

代码如下

复制代码

[root@361way ~]# cd /etc/sysconfig/network-scripts/
[root@361way network-scripts]# cat ifcfg-br0
TYPE=Bridge
BOOTPROTO=none
DEVICE=br0
ONBOOT=yes
IPADDR0=192.168.0.102
PREFIX0=24
GATEWAY0=192.168.0.1
[root@361way network-scripts]# cat ifcfg-enp3s0
DEVICE=enp3s0
TYPE=Ethernet
ONBOOT=yes
BRIDGE=br0
[root@361way ~]reboot
[root@361way 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@361way 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、selinux防火墙关闭

代码如下	复制代码
# setenforce 0 # sed -i 's/=enforcing/=disabled/g' /etc/selinux/config

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