一.前期准备

1.确定机器有VT

终端输入命令：

grep '(vmx|svm)' /proc/cpuinfo

如果flags: 里有vmx 或者svm就说明支持VT；如果没有任何的输出，说明你的cpu不支持，将无法使用KVM虚拟机。

2.确保BIOS里开启VT:  Intel(R) Virtualization Tech [Enabled]  使用如下命令

lsmod | grep kvm

modprobe kvm-intel

二.桥接网络

使用桥接网络，虚拟机即可与其他机器互相访问。  1.复制ifcfg-em1 为 ifcfg-br0，并将ifcfg-br0改为如下配置

TYPE=Bridge

BOOTPROTO=static

DEFROUTE=yes

PEERDNS=yes

PEERROUTES=yes

IPV4_FAILURE_FATAL=no

NAME=br0

DEVICE=br0

ONBOOT=yes

IPADDR=192.168.1.116

NETMASK=255.255.255.0

GATEWAY=192.168.1.1

2.原网卡ifcfg-em1只保留如下配置,其他都注释掉：

NAME=em1

DEVICE=em1

ONBOOT=yes

BRIDGE=br0

3.重启网络

service network restart

三.安装kvm

1.安装kvm

yum -y install libcanberra-gtk2 qemu-kvm.x86_64 qemu-kvm-tools.x86_64    libvirt.x86_64 libvirt-cim.x86_64 libvirt-client.x86_64 libvirt-java.noarch  libvirt-python.x86_64 libiscsi-1.7.0-5.el6.x86_64  dbus-devel  virt-clone tunctl virt-manager libvirt libvirt-python python-virtinst

2.安装x-windows,使用图形界面管理虚拟机

yum groupinstall "X Window System"

3.安装中文字符，解决界面乱码问题

yum install dejavu-lgc-sans-fonts

yum groupinstall "Fonts" -y

错误：  1. couldn’t connect to accessibility bus failed to connect to socket /tmp/dbus  解决方法：

export NO_AT_BRIDGE=1

四.使用  1.使用virt-manager管理虚拟机，可以完成克隆，安装，开启，关闭等大部分的动作  如是ssh命令登录服务器，需加上XC参数。  如是在windows环境下通过putty登录服务器，需打开x-windows，方法如下:

在http://www.landui.com/projects/xming/下载Xming，并安装运行。

putty.exe ==> Connection/SSH/X11 ==> X11 forwarding/Enable打勾即可,X dispaly location可以空着

2.创建预分配文件

qemu-img create -f qcow2 -o preallocation=metadata /data/test.qcow2 80G

3.让虚拟机开机自动启动

virsh list --all  查看虚拟机名称及状态

virsh autostart +虚拟机名称

设置后可在/etc/libvirt/qemu/autostart下看到已设置自动启动KVM配置文件链接

15.CentOS 7安装配置oVirt

oVirt（http://www.landui.com/）是基于 KVM 项目的开源软件，其前身是 Redhat 的桌面虚拟化商业产品。

oVirt相关项目源代码：https://www.landui.com/oVirt

oVirt主要由两部分组成：

oVirt Engine：基于Web的图形管理接口

oVirt Node：类似KVM，用来创建运行虚拟机

CentOS 7安装配置oVirt

基本系统环境：

oVirt Engine：192.168.0.10  (hostname：ovirtengine.topspeedsnail.com)

oVirt Node：192.168.0.20  (hostname：ovirtnode.topspeedsnail.com)

如果你没有使用DNS解析域名，在/etc/hosts文件中添加：

192.168.0.10 ovirtengine.topspeedsnail.com

192.168.0.20 ovirtnode.topspeedsnail.com

安装oVirt Engine

oVirt目前最新版本是4.0，添加oVirt4.0仓库：

yum update

yum install http://www.landui.com/pub/yum-repo/ovirt-release40.rpm

安装ovirt-engine：

yum install ovirt-engine

运行初始化脚本，设置oVirt Engine：

engine-setup --generate-answer=/root/answer.txt

你需要回答一系列问题，答案会记录到answer.txt文件，下次你可以直接使用这个文件自动回答。

[ INFO  ] Stage: Initializing

[ INFO  ] Stage: Environment setup

Configuration files: ['/etc/ovirt-engine-setup.conf.d/10-packaging-jboss.conf', '/etc/ovirt-engine-setup.conf.d/10-packaging.conf']

Log file: /var/log/ovirt-engine/setup/ovirt-engine-setup-20160827090938-ruls1l.log

Version: otopi-1.5.2 (otopi-1.5.2-1.el7.centos)

[ INFO  ] Stage: Environment packages setup

[ INFO  ] Yum Downloading: base/7/x86_64 (0%)

[ INFO  ] Yum Downloading: ovirt-4.0-epel/x86_64/primary_db 404 k(9%)

[ INFO  ] Yum Downloading: ovirt-4.0-epel/x86_64/primary_db 1.6 M(37%)

[ INFO  ] Yum Downloading: ovirt-4.0-epel/x86_64/primary_db 2.8 M(66%)

[ INFO  ] Yum Downloading: ovirt-4.0-epel/x86_64/primary_db 3.8 M(90%)

[ INFO  ] Stage: Programs detection

[ INFO  ] Stage: Environment setup

[ INFO  ] Stage: Environment customization

--== PRODUCT OPTIONS ==--

Configure Engine on this host (Yes, No) [Yes]: Yes

Configure Image I/O Proxy on this host? (Yes, No) [Yes]: Yes

Configure WebSocket Proxy on this host (Yes, No) [Yes]: Yes

Please note: Data Warehouse is required for the engine. If you choose to not configure it on this host, you have to configure it on a remote host, and then configure the engine on this host so that it can access the database of the remote Data Warehouse host.

Configure Data Warehouse on this host (Yes, No) [Yes]: Yes

Configure VM Console Proxy on this host (Yes, No) [Yes]: Yes

--== PACKAGES ==--       

[ INFO  ] Checking for product updates...

[ INFO  ] No product updates found

--== NETWORK CONFIGURATION ==--

Host fully qualified DNS name of this server [ovirtengine.topspeedsnail.com]: ovirtengine.topspeedsnail.com

--== DATABASE CONFIGURATION ==--

Where is the DWH database located? (Local, Remote) [Local]: Local

Setup can configure the local postgresql server automatically for the DWH to run. This may conflict with existing applications.

Would you like Setup to automatically configure postgresql and create DWH database, or prefer to perform that manually? (Automatic, Manual) [Automatic]: Automatic

Where is the Engine database located? (Local, Remote) [Local]: Local

Setup can configure the local postgresql server automatically for the engine to run. This may conflict with existing applications.

Would you like Setup to automatically configure postgresql and create Engine database, or prefer to perform that manually? (Automatic, Manual) [Automatic]: Automatic

--== OVIRT ENGINE CONFIGURATION ==--

Engine admin password: 

Confirm engine admin password: 

[WARNING] Password is weak: it is too simplistic/systematic

Use weak password? (Yes, No) [No]: Yes

Application mode (Virt, Gluster, Both) [Both]: Both

--== STORAGE CONFIGURATION ==--

Default SAN wipe after delete (Yes, No) [No]: No

--== PKI CONFIGURATION ==--

Organization name for certificate [topspeedsnail.com]: MyTest

--== APACHE CONFIGURATION ==--

Setup can configure the default page of the web server to present the application home page. This may conflict with existing applications.

Do you wish to set the application as the default page of the web server? (Yes, No) [Yes]: Yes

Setup can configure apache to use SSL using a certificate issued from the internal CA.

Do you wish Setup to configure that, or prefer to perform that manually? (Automatic, Manual) [Automatic]: Automatic

--== SYSTEM CONFIGURATION ==--

Configure an NFS share on this server to be used as an ISO Domain? (Yes, No) [No]: No

--== MISC CONFIGURATION ==--

Please choose Data Warehouse sampling scale:

(1) Basic

(2) Full

(1, 2)[1]: 1

--== END OF CONFIGURATION ==--

[ INFO  ] Stage: Setup validation

[WARNING] Warning: Not enough memory is available on the host. Minimum requirement is 4096MB, and 26384MB is recommended.  # 内存推荐4G+

Do you want Setup to continue, with amount of memory less than recommended? (Yes, No) [No]: Yes

--== CONFIGURATION PREVIEW ==--

Application mode                        : both

Default SAN wipe after delete           : False

Update Firewall                         : False

Host FQDN                               : ovirtengine.topspeedsnail.com

Engine database secured connection      : False

Engine database host                    : localhost

Engine database user name               : engine

Engine database name                    : engine

Engine database port                    : 5432

Engine database host name validation    : False

DWH database secured connection         : False

DWH database host                       : localhost

DWH database user name                  : ovirt_engine_history

DWH database name                       : ovirt_engine_history

DWH database port                       : 5432

DWH database host name validation       : False

Engine installation                     : True

PKI organization                        : MyTest

Configure local Engine database         : True

Set application as default page         : True

Configure Apache SSL                    : True

DWH installation                        : True

Configure local DWH database            : True

Engine Host FQDN                        : ovirtengine.topspeedsnail.com

Configure Image I/O Proxy               : True

Configure VMConsole Proxy               : True

Configure WebSocket Proxy               : True

Please confirm installation settings (OK, Cancel) [OK]: OK

[ INFO  ] Stage: Transaction setup

[ INFO  ] Stopping engine service

[ INFO  ] Stopping ovirt-fence-kdump-listener service

[ INFO  ] Stopping dwh service

[ INFO  ] Stopping Image I/O Proxy service

[ INFO  ] Stopping websocket-proxy service

[ INFO  ] Stage: Misc configuration

[ INFO  ] Stage: Package installation

[ INFO  ] Stage: Misc configuration

[ INFO  ] Upgrading CA

[ INFO  ] Initializing PostgreSQL

[ INFO  ] Creating PostgreSQL 'engine' database

[ INFO  ] Configuring PostgreSQL

[ INFO  ] Creating PostgreSQL 'ovirt_engine_history' database

[ INFO  ] Configuring PostgreSQL

[ INFO  ] Creating CA

[ INFO  ] Creating/refreshing Engine database schema

[ INFO  ] Creating/refreshing DWH database schema

[ INFO  ] Configuring Image I/O Proxy

[ INFO  ] Setting up ovirt-vmconsole proxy helper PKI artifacts

[ INFO  ] Setting up ovirt-vmconsole SSH PKI artifacts

[ INFO  ] Configuring WebSocket Proxy

[ INFO  ] Creating/refreshing Engine 'internal' domain database schema

[ INFO  ] Generating post install configuration file '/etc/ovirt-engine-setup.conf.d/20-setup-ovirt-post.conf'

[ INFO  ] Stage: Transaction commit

[ INFO  ] Stage: Closing up

[ INFO  ] Starting engine service

[ INFO  ] Starting dwh service

[ INFO  ] Restarting ovirt-vmconsole proxy service

--== SUMMARY ==--

[ INFO  ] Restarting httpd

# 如果开启了防火墙，执行如下命令添加规则

In order to configure firewalld, copy the files from

/etc/ovirt-engine/firewalld to /etc/firewalld/services

and execute the following commands:

firewall-cmd --permanent --add-service ovirt-postgres

firewall-cmd --permanent --add-service ovirt-https

firewall-cmd --permanent --add-service ovirt-fence-kdump-listener

firewall-cmd --permanent --add-service ovirt-imageio-proxy

firewall-cmd --permanent --add-service ovirt-websocket-proxy

firewall-cmd --permanent --add-service ovirt-http

firewall-cmd --permanent --add-service ovirt-vmconsole-proxy

firewall-cmd --reload

The following network ports should be opened:

tcp:2222

tcp:443

tcp:5432

tcp:54323

tcp:6100

tcp:80

udp:7410

An example of the required configuration for iptables can be found at:

/etc/ovirt-engine/iptables.example

Please use the user 'admin@internal' and password specified in order to login

Web access is enabled at:

http://www.landui.com:80/ovirt-engine

https://www.landui.com:443/ovirt-engine

Internal CA 21:28:E7:25:E0:C4:A7:B6:BD:B5:12:3C:F0:21:AA:EC:5C:6A:69:9D

SSH fingerprint: 0e:df:b7:1d:ec:33:99:c2:ea:4b:25:46:22:75:2d:42

--== END OF SUMMARY ==--

[ INFO  ] Stage: Clean up

Log file is located at /var/log/ovirt-engine/setup/ovirt-engine-setup-20160827090938-ruls1l.log

[ INFO  ] Generating answer file '/var/lib/ovirt-engine/setup/answers/20160827092010-setup.conf'

[ INFO  ] Generating answer file '/root/answer.txt'

[ INFO  ] Stage: Pre-termination

[ INFO  ] Stage: Termination

[ INFO  ] Execution of setup completed successfully

使用浏览器访问（替换你使用的域名或IP）：

http://www.landui.com:80/ovirt-engine

https://www.landui.com:443/ovirt-engine

https://www.landui.com_server_IP

使用管理员用户登录：

使用前面设置的admin账户登录：

安装oVirt Node

安装oVirt Node有两种方法。第一种：下载安装oVirt Node系统镜像；第二种：在已有的CentOS系统上安装vdsm。

第一种方法

下载oVirt Node ISO文件：http://www.landui.com/node/

把下载的ISO系统镜像做成启动安装盘（DVD或USB）

在服务器上安装系统：

这个系统是基于CentOS的，安装步骤和安装CentOS一样。

安装完oVirt Node，设置好环境之后，把oVirt Node添加到到oVirt Engine。

登录进oVirt Engine的管理员界面->Hosts标签->New

Host Cluster：Default

Name：ovirtnode.topspeedsnail.com

Address：192.168.0.20

SSH Port：22

User Name：root

Password：<root用户密码>

现在你就可以使用oVirt Engine创建管理虚拟机了。