CentOS7 Mini版本安装KVM虚拟化
默认服务器为Mini安装，将当前Mini安装系统，升级为KVM虚拟机，通过VNC客户端登录后进行管理KVM
安装VNC工具
VNC英文全称为Virtual Network Computing，可以位操作系统提供图形接口连接方式，简单的来说就是一款桌面共享应用
安装前准备环境
[root@localhost]# wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
[root@localhost]# sed -i 's/^enabled=0/enabled=1/g' /etc/yum.repos.d/CentOS-Base.repo
[root@localhost]# yum clean all && yum makecache
[root@localhost]# yum check-update
安装图形换界面
[root@localhost]# yum groups install "MATE Desktop"
# 修改默认启动方式为图形化界面
[root@localhost]# systemctl set-default graphical.target
# 恢复为命令模式
[root@localhost]# systemctl set-default multi-user.target
[root@localhost]#
安装配置VNC
[root@localhost]# yum install tigervnc-server -y
[root@localhost]# cp /usr/lib/systemd/system/vncserver@.service /usr/lib/systemd/system/vncserver@:1.service
# 修改为root身份执行
[root@localhost]# cat /usr/lib/systemd/system/vncserver@:1.service
[Unit]
Description=Remote desktop service (VNC)
After=syslog.target network.target
[Service]
Type=simple
# Clean any existing files in /tmp/.X11-unix environment
ExecStartPre=/bin/sh -c '/usr/bin/vncserver -kill %i > /dev/null 2>&1 || :'
ExecStart=/usr/bin/vncserver_wrapper root %i
ExecStop=/bin/sh -c '/usr/bin/vncserver -kill %i > /dev/null 2>&1 || :'
[Install]
WantedBy=multi-user.target
[root@localhost]# systemctl daemon-reload
配置VNC账户
[root@localhost]# vncpasswd
*****
开启NVC服务
[root@localhost]# systemctl enable vncserver@:1.service
[root@localhost]# systemctl start vncserver@:1.service
开启对应的防火墙
[root@localhost]# firewall-cmd --permanent --add-service vnc-server
[root@localhost]# systemctl restart firewalld.service
VNC-Client安装
此时可通过访问下载VNC-Client地址下载对应的客户，通过前面分配密码进行认证登录，注意端口默认从5091往后延续
安装KVM虚拟化
[root@localhost]# yum install qemu-kvm libvirt libvirt-client virt-install bridge-utils libguestfs-tools virt-manager virt-viewer
[root@localhost]# reboot
[root@localhost]# systemctl enable libvirtd
[root@localhost]# systemctl start libvirtd
