KVM虚拟化安装

1.安装软件包

yum -y install kvm python-virtinst libvirt tunctl bridge-utils virt-manager qemu-kvm-tools virt-viewer virt-v2v libguestfs-tools

 

2.启动服务并设置开机启动

CentOS6：

    service libvirtd restart

    chkconfig libvirtd on

CentOS7：

    systemctl start libvirtd.service

    systemctl enable libvirtd.service

 

3.配置桥接网卡

cp /etc/sysconfig/network-scripts/ifcfg-em1 /tmp

cp /etc/sysconfig/network-scripts/ifcfg-$eth /tmp
cat > "/etc/sysconfig/network-scripts/ifcfg-$eth"<<eof
DEVICE=$ncname
TYPE=Ethernet
ONBOOT=yes
BOOTPROTO=none
BRIDGE=br0
eof

cat > "/etc/sysconfig/network-scripts/ifcfg-br0" <<eof
DEVICE=br0
ONBOOT=yes
TYPE=Bridge
BOOTPROTO=none
IPADDR=$ncip
PREFIX=24
GATEWAY=$ncgw
eof

重启网卡：

/etc/init.d/network restart

 

4.系统参数配置

sed -i 's/.*net.ipv4.ip_forward.*/net.ipv4.ip_forward = 1/g' /etc/sysctl.conf
sysctl -p

 

5. 新建虚拟机相关目录

虚拟机镜像文件存放目录：

mkdir -p /var/cache/convirt/vm_disks

虚拟机monitors文件存放目录：

mkdir -p /var/run/kvm/monitors

虚拟机monitors文件存放目录：

mkdir -p /var/run/kvm/pids

 

虚拟机网卡桥接脚本

mkdir -p /etc/kvm

cat > "/etc/kvm/qemu-ifup-br0" < eof

#!/bin/bash
#
# ConVirt - Copyright (c) 2008 Convirture Corp.
# ======
#
# ConVirt is a Virtualization management tool with a graphical user
# interface that allows for performing the standard set of VM operations
# (start, stop, pause, kill, shutdown, reboot, snapshot, etc...). It
# also attempts to simplify various aspects of VM lifecycle management.
#
#
# This software is subject to the GNU General Public License, Version 2 (GPLv2)
# and for details, please consult it at:
#
# http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
# 
#
# author : mkelkar@users.sourceforge.net
#
switch=br0

if [ -n "$1" ];then
tunctl -u `whoami` -t $1
ip link set $1 up
sleep 0.5s
brctl addif ${switch} $1
exit 0
else
echo "Error: no interface specified"
exit 1
fi

eof