centos7安装kvm
centos7安装kvm
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：
[root@zw ~]# yum -y install libvirt qemu-kvm virt-install libssh2 virt-viewer bridge-utils
[root@zw ~]# lsmod | grep kvm # make sure modules are loaded
kvm_intel 148081 0
kvm 461126 1 kvm_intel
vnc监听 宿主的任何ip
echo 'vnc_listen = "0.0.0.0"'>> /etc/libvirt/qemu.conf
[root@zw ~]# systemctl start libvirtd
[root@zw ~]# 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
[root@zw ~]# cd /etc/sysconfig/network-scripts/
[root@zw network-scripts]# cat ifcfg-br0
TYPE=Bridge
BOOTPROTO=none
DEVICE=br0
ONBOOT=yes
IPADDR0=10.10.33.17
PREFIX0=24
GATEWAY0=10.10.33.1
[root@zw network-scripts]# cat ifcfg-enp3s0
DEVICE=enp3s0
TYPE=Ethernet
ONBOOT=yes
BRIDGE=br0
[root@zw ~]reboot
[root@zw network-scripts]# ifconfig
br0: flags=4163 mtu 1500
inet 10.10.33.17 netmask 255.255.255.0 broadcast 10.10.33.255
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@zw 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 10.10.33.17/24 brd 10.10.33.255 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
# setenforce 0
# sed -i 's/=enforcing/=disabled/g' /etc/selinux/config
四、创建虚拟机：
# cd /data
# mkdir 10.10.33.200
# cd 10.10.33.200
创建虚拟磁盘
qemu-img create -f qcow2 system.qcow2 100G(自定义)
创建虚拟机(定义cpu/内存/网卡/系统安装方式)
virt-install --name=10.10.33.200 --ram 2048 --vcpus=2 --arch=x86_64 --os-type=linux --os-variant='rhel6' --disk path=/data/10.10.33.200/system.qcow2,device=disk,bus=virtio,format=qcow2 --accelerate --pxe --graphics vnc,password=123456 --network bridge=br1 --force --autostart
常用命令：
virsh list 查看虚拟机状态
Id Name State
----------------------------------------------------
2 10.10.33.200 running
virsh vncdisplay 虚拟机名称 （查看虚拟机vnc端口号）
：0
virsh destroy 10.10.33.200 强制关闭虚拟机
virsh start 10.10.33.200 开启虚拟机