KVM虚拟化

操作环境：CentOS7

#查看kvm模块的相关信息：
[root@~ localhost]#modinfo kvm
filename:       /lib/modules/3.10.0-514.el7.x86_64/kernel/arch/x86/kvm/kvm.ko
#安装kvm模块
[root@~ localhost]#modprobe kvm

[root@~ localhost]#ls /dev/kvm -lh
crw-------. 1 root root 10, 232 Jul 18 20:31 /dev/kvm
[root@~ localhost]#lsmod|grep kvm
kvm_intel             170181  0 
kvm                   554609  1 kvm_intel
irqbypass              13503  1 kvm
#查看硬件支持
[root@~ localhost]#grep -i -E '(vmx|svm|lm)' /proc/cpuinfo

#模拟化工具qemu安装kvm：
[root@~ localhost]#yum -y install qemu-kvm
[root@~ localhost]#rpm -ql qemu-kvm
/usr/libexec/qemu-kvm
#无法访问qemu-kvm命令，创建软连接：
[root@~ localhost]#ln -sv /usr/libexec/qemu-kvm /usr/sbin/

[root@~ localhost]#qemu-
qemu-img  qemu-io   qemu-kvm  qemu-nbd

#安装图形化管理界面包
[root@~ localhost]#yum -y install virt-manager
#安装守护进程包
[root@~ localhost]#yum -y install libvirt-daemon-kvm
[root@~ localhost]#systemctl start libvirtd.service

#关闭
[root@~ localhost]#systemctl stop NetworkManager.service

#创建桥接设备
[root@~ localhost]#virsh bridge ens33 bro

[root@~ localhost]#ip a
3: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP qlen 1000
    link/ether 00:0c:29:6c:aa:0c brd ff:ff:ff:ff:ff:ff
    inet 172.16.252.142/16 brd 172.16.255.255
#开启图形化虚拟主机管理界面
[root@~ localhost]#virt-manager