kvm虚拟化环境安装
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,
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#cat /proc/cpuinfo | grep name | cut -d: -f2 | uniq -c
2Intel(R) Core(TM) i3-4150 CPU @ 3.50GHz
# 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
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# dmidecode|grep -A5 "Memory Device"|grep Size | cut -d: -f2 | sort -n | uniq -c
63No Module Installed
631 kB
18 GB
18192 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:
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# dmidecode| grep -A16 "Memory Device" | grep Speed | sort -n | uniq -c
64 Speed: Unknown
# dmidecode|grep'Maximum Capacity'
Maximum Capacity: 1 TB
#
（二）安装kvm
1，查看服务器是否支持虚拟化
# grep -E -o 'vmx|svm' /proc/cpuinfo
vmx
2，安装kvm软件包
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# yum -y install kvm python-virtinst libvirt tunctl bridge-utils virt-manager qemu-kvm-tools virt-viewervirt-v2v
3，安装kvm虚拟化管理工具包
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# yum installlibguestfs-tools -y
4，查看虚拟机的相关环境
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# /etc/init.d/libvirtd restart
Stopping libvirtd daemon:
Starting libvirtd daemon:
# virsh -c qemu:///system list
Id Name State
----------------------------------------------------
1 hadoop4 running
# virsh --version ###查看虚拟机的版本
0.10.2
# virt-install --version ###查看虚拟机工具的版本
0.600.0
# ln -s /usr/libexec/qemu-kvm /usr/bin/qemu-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
#
5，手动创建虚拟网桥：
a,首先NetworkManager服务：
# /etc/init.d/NetworkManager status
NetworkManager (pid1132) is running...
# /etc/init.d/NetworkManager stop
Stopping NetworkManager daemon:
# /etc/init.d/NetworkManager status
NetworkManager is stopped
# chkconfig NetworkManager off
b,创建br0网桥：
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# cp ifcfg-eth0 ifcfg-br0
# vi ifcfg-eth0
DEVICE=eth0
HWADDR=00:0C:29:75:92:CF
TYPE=Ethernet
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=static
BRIDGE=br0
DEFROUTE=yes
NAME=Systemeth0
IPADDR=10.1.156.200
NETMASK=255.255.255.0
GATEWAY=10.1.156.1
DNS1=10.1.156.1
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# vi ifcfg-br0
UUID=c12c5da8-e4dd-43e0-a5cb-2c5491d68aff
DEVICE=br0 ###修改为:br0
HWADDR=00:0C:29:75:92:CF ###不变
TYPE=Bridge ###把Ethernet变成Bridge
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=static
IPADDR=10.1.156.201 ###修改下ip
NETMASK=255.255.255.0
GATEWAY=10.1.156.1
DNS1=10.1.156.1
c，关闭了networkmanager服务之后，才能通过service networkrestart管理网络
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