在安装虚拟化环境的时候，首先查看下该服务器的硬件配置和环境，具体操作如下：
(一)检查硬件的相关情况：
1，查看cpu型号，物理cpu颗数,
[root@KVM ~]# cat /proc/cpuinfo | grep name | cut -d: -f2 | uniq -c 2 Intel(R) Core(TM) i3-4150 CPU @ 3.50GHz [root@KVM ~]# cat /proc/cpuinfo | grep physical | sort -n | uniq -c 2 address sizes : 42 bits physical, 48 bits virtual 16 physical id : 0 ###说明有一颗cpu,颗数是从0开始的
2，查看内存
[root@KVM ~]# dmidecode|grep -A5 "Memory Device"|grep Size | cut -d: -f2 | sort -n | uniq -c 63 No Module Installed 63 1 kB 1 8 GB 1 8192 MB ###接了一根内存，每根内存的大小为8G
3，查看其它的相关参数:
[root@KVM ~]# dmidecode | grep -A16 "Memory Device" | grep Speed | sort -n | uniq -c 64 Speed: Unknown [root@KVM ~]# dmidecode|grep 'Maximum Capacity' Maximum Capacity: 1 TB [root@KVM ~]#
（二）安装kvm
1，查看服务器是否支持虚拟化
[root@KVM ~]# grep -E -o 'vmx|svm' /proc/cpuinfo
vmx
2，安装kvm软件包
[root@KVM ~]# yum -y install kvm python-virtinst libvirt tunctl bridge-utils virt-manager qemu-kvm-tools virt-viewer virt-v2v
3，安装kvm虚拟化管理工具包
[root@KVM ~]# yum install libguestfs-tools -y
4，查看虚拟机的相关环境
[root@KVM ~]# /etc/init.d/libvirtd restart Stopping libvirtd daemon: [ OK ] Starting libvirtd daemon: [ OK ] [root@KVM ~]# virsh -c qemu:///system list Id Name State ---------------------------------------------------- 1 hadoop4 running [root@KVM ~]# virsh --version ###查看虚拟机的版本 0.10.2 [root@KVM ~]# virt-install --version ###查看虚拟机工具的版本 0.600.0 [root@KVM ~]# ln -s /usr/libexec/qemu-kvm /usr/bin/qemu-kvm [root@KVM ~]# qemu-kvm -version QEMU PC emulator version 0.12.1 (qemu-kvm-0.12.1.2-2.479.el6_7.3), Copyright (c) 2003-2008 Fabrice Bellard [root@KVM ~]#
5，手动创建虚拟网桥：
a,首先NetworkManager服务：
[root@KVM network-scripts]# /etc/init.d/NetworkManager status
NetworkManager (pid 1132) is running...
[root@KVM network-scripts]# /etc/init.d/NetworkManager stop
Stopping NetworkManager daemon: [ OK ]
[root@KVM network-scripts]# /etc/init.d/NetworkManager status
NetworkManager is stopped
[root@KVM network-scripts]# chkconfig NetworkManager off
b,创建br0网桥：
[root@KVM network-scripts]# cp ifcfg-eth0 ifcfg-br0 [root@KVM network-scripts]# vi ifcfg-eth0 DEVICE=eth0 BOOTPROTO=static NM_CONTROLLED="no" ONBOOT=yes TYPE=Ethernet BRIDGE=br0 IPADDR=10.1.156.201 PREFIX=24 GATEWAY=10.1.156.1 DNS1=10.1.156.1 DNS2=114.114.114.114 DEFROUTE=yes IPV4_FAILURE_FATAL=yes IPV6INIT=no NAME=Systemeth0
[root@KVM network-scripts]# vi ifcfg-br0 DEVICE=br0 HWADDR=00:0C:29:75:92:CF TYPE=Bridge ONBOOT=yes BOOTPROTO=static IPADDR=10.1.156.200 NETMASK=255.255.255.0 GATEWAY=10.1.156.1 DNS1=10.1.156.1 DNS2=114.114.114.114
c，关闭了networkmanager服务之后，才能通过service networkrestart管理网络
[root@KVM ~]# /etc/init.d/network restart Shutting down interface br0: [ OK ] Shutting down interface eth0: [ OK ] Shutting down loopback interface: [ OK ] Bringing up loopback interface: [ OK ] Bringing up interface eth0: [ OK ] Bringing up interface br0: Determining if ip address 10.1.156.200 is already in use for device br0... [ OK ]
如图：
d,查看网桥br0
[root@KVM ~]# ifconfig br0 Link encap:Ethernet HWaddr 00:0C:29:75:92:CF inet addr:10.1.156.200 Bcast:10.1.156.255 Mask:255.255.255.0 inet6 addr: fe80::20c:29ff:fe75:92cf/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:181 errors:0 dropped:0 overruns:0 frame:0 TX packets:28 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:17908 (17.4 KiB) TX bytes:3068 (2.9 KiB) eth0 Link encap:Ethernet HWaddr 00:0C:29:75:92:CF inet6 addr: fe80::20c:29ff:fe75:92cf/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:183 errors:0 dropped:0 overruns:0 frame:0 TX packets:32 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:20562 (20.0 KiB) TX bytes:3396 (3.3 KiB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:1033 errors:0 dropped:0 overruns:0 frame:0 TX packets:1033 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:62322 (60.8 KiB) TX bytes:62322 (60.8 KiB) virbr0 Link encap:Ethernet HWaddr 52:54:00:F1:6D:D1 inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) vnet0 Link encap:Ethernet HWaddr FE:54:00:FE:F5:A3 inet6 addr: fe80::fc54:ff:fefe:f5a3/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:31517 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:0 (0.0 b) TX bytes:1639040 (1.5 MiB)
e,查看网桥
[root@KVM ~]# brctl show bridge name bridge id STP enabled interfaces br0 8000.000c297592cf no eth0 virbr0 8000.525400f16dd1 yes virbr0-nic vnet0
kvm环境安装完成。
