Centos7 使用kvm创建虚拟机

1. KVM环境配置

关闭Selinux

 (1)
[root@ localhost ~]#vim /etc/sysconfig/selinux 
# 修改SELINUX=disabled
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
#     enforcing - SELinux security policy is enforced.
#     permissive - SELinux prints warnings instead of enforcing.
#     disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of these two values:
#     targeted - Targeted processes are protected,
#     mls - Multi Level Security protection.
SELINUXTYPE=targeted
 (2)
[root@ localhost ~]#setenforce 0                     #当次生效，getenforce 查看当前selinux状态
 (3)关闭防火墙
[root@ localhost ~]#systemctl stop firewalld
[root@ localhost ~]#systemctl disable firewalld
 (4)查看是否支持虚拟机
[root@localhost ~]# egrep -c '(vmx|svm)' /proc/cpuinfo
2
#如果执行这条命令的返回结果为0则表示CPU不支持虚拟化，如果返回结果为1或者大于1到数字则表示CPU支持虚拟。其中vmx为Intel的CPU指令集，svm为AMD的CPU指令集。