一、VMware虛擬機上的CPU開啟支持虛擬化
二、Virsh的安裝
1）安裝kvm和libvirted
#yum install -y qemu-kvm openssl #安裝虛擬化工具軟件包和遠程連接
#yum install -y libvirt #安裝virt-install工具，用來創建虛擬機
#yum install -y virt-manager #安裝KVM 圖形化管理工具
2) 啟動libvirtd,並將它設為開機啟動
#systemctl start libvirtd && systemctl enable libvirtd
3) 啟動后使用ifconfig查看,發現會多出來一塊virbr0的網卡說明libvirtd啟動成功,如果默認沒有ifconfig命令,使用yum install -y net-tools安裝，如果能看見virbr0，就表示成功
#yum install -y net-tools #ifconfig eno16777736: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.0.129 netmask 255.255.255.0 broadcast 192.168.0.255 inet6 fe80::20c:29ff:fef9:6739 prefixlen 64 scopeid 0x20<link> ether 00:0c:29:f9:67:39 txqueuelen 1000 (Ethernet) RX packets 13022 bytes 15452626 (14.7 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 5237 bytes 568995 (555.6 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 0 (Local Loopback) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255 ether 00:00:00:00:00:00 txqueuelen 0 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
4) SecureCRT通過virt-manager啟用圖形化界面
1、windows安裝Xming
下載地址：https://sourceforge.net/projects/xming/
下載完安裝好啟動就行了。
2、設置一下SecureCRT的會話選項
3. vi /etc/ssh/sshd_config,確定下圖的設置為yes
4、CentOS7.2最小化安裝后（不用安裝GUI），需要安裝支持圖形幾個X11的rpm包，其中xorg-x11-server-utils是圖形化主安裝包，而xorg-x11-apps則包含了測試要用的的xclock命令。
[root@localhost ~]# yum install -y xorg-x11-server-utils xorg-x11-apps xorg-x11-utils
5、Windows主機上雙擊運行Xmanager - Passive，會在任務欄中出現Xmanager - Passive的圖標，鼠標懸浮其上會顯示圖形化監聽的設備為[:0.0]
6、在linux主機上以root用戶執行xhost +命令打開x-window的訪問權限（會提示xhost: unable to open display ""，不用管它）。如果服務器是圖形化界面啟動的，xhost +命令可以不用執行，如果不是，則運行下面的命令
[root@localhost ~]# xhost +
access control disabled, clients can connect from any host
7、切換到其他需要執行圖形化命令的用戶，如virt-manager，定義圖形化顯示的地址變量，其中ip地址為運行CRT的windows主機地址，監聽設備為上面Xmanager - Passive的監聽的設備
[root@localhost ~]$ export DISPLAY=192.168.2.11:0.0
8、啟用virt-manager命令
#virt-manager
報錯匯總：
錯誤一：
# virt-manager
Unable to initialize GTK: could not open display
確保有安裝xorg-x11-xauth
#yum -y install xorg-x11-xauth
退出secureCRT后從新登錄，然后再調用virt-manager即可。
錯誤二：
# virt-manager process 2827: D-Bus library appears to be incorrectly set up; failed to read machine uuid: Failed to open "/var/lib/dbus/machine-id": No such file or directory See the manual page for dbus-uuidgen to correct this issue. D-Bus not built with -rdynamic so unable to print a backtrace
確保libvirtd開啟狀態：
三、新建一台KVM虛機
