KVM

suran

1.安装要求
检查CPU是否支持虚拟化
/proc/cpuinfo
intel vmx
amd svm

emerge
app-emulation/qemu-kvm
sys-apps/usbutils
net-misc/bridge-utils
sys-apps/usermode-utilities

gpasswd -a <your_user_name> kvm

2.内核配置

2. [*] Virtualization --->
3.     --- Virtualization
4.      Kernel-based Virtual Machine (KVM) support
5.     <M>   KVM for Intel processors support
6.     <M>   KVM for AMD processors support
7. Device Drivers --->
8.     [*] Network device support --->
9.              Universal TUN/TAP device driver support
11. Networking support --->
12.     Networking options --->
13.         <*> 802.1d Ethernet Bridging
14.         <*> 802.1Q VLAN Support

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3.创建一个虚拟机磁盘
qemu-img create -f qcow2 guet.img 10G
还可以先来创建一个快照
qemu-img snapshot -c snapshot1 guest.img

4.启动脚本
注：这个配合qemu-ifup启动，如使用《虚拟网桥》中的方法2按需重新配置

2. #!/bin/sh
3. KVM_CMD=/usr/bin/qemu
4. MACHINE=pc
5. DAEMON="-daemonize"
6. HOST=192.168.0.252
7. SMP=2,cores=2
8. TAP=2
9. NET="-net nic -net tap,ifname=tap$TAP,script=/etc/qemu/qemu-ifup"
10. #CDROM="-cdrom /home/shom/sfot/DEEPIN-LITEXP-6.2.iso -boot d"
11. MEM=512
12. DISK=/home/shom/kvm/xp0.img
13. #SNAPSHOT="-snapshot"
15. test -n "$1" &amp;&amp; TAP=$1
16. test -n "$DISK" &amp;&amp; HDA="-drive file=$DISK,cache=writeback,boot=on" || HDA="-hda $2"
17. shift 2
18. OTHER=$@
20. RUN_CMD="sudo $KVM_CMD -M $MACHINE -smp $SMP $NET -m $MEM $HDA $CDROM $SNAPSHOT -enable-kvm -daemonize -rtc base=localtime -clock rtc"
22. echo "运行命令：$RUN_CMD"
23. $RUN_CMD
25. if test $? = 0; then
26.     echo "KVM 运行成功，$HOST:$TAP ..."
27.     exit 0
28. else
29.     echo "KVM 运行失败，请检查命令行是否有错误!"
30.     exit 1
31. fi
33. # -m 内存大小
34. # -rtc base=localtime 使用主机时间
35. # -clock 选择时钟，优先使用HPET -&gt; RTC
36. # -M 系统类型
37. # -snapshot数据不保存到磁盘映像
38. # -smp 设置CPU
39. # -drive 设定虚拟机文件 cache=writeback 缓存方式 boot=on 可启动介质
40. # -boot 启动选项 c 为硬盘 d 光驱
41. # -no-acpi 关闭acpi
42. # -enable-kvm 开启kvm虚拟化
43. # -name 设置guest标示

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5.虚拟网桥
注：可能在大多数（可能全部）无线设备不能工作，应该是这些设备不知道桥接吧
方法1:使用脚本创建网桥
注：配置完成后，如果不想重启就停止net.eth0；然后执行/etc/ini.t/net.br0

2. #!/bin/sh
3. switch=$(/sbin/route |awk '/^default / { print $8 }')
4. #/usr/bin/tunctl -u shom -t $1
5. /sbin/ifconfig $1 0.0.0.0 up
6. /sbin/brctl addif ${switch} $1

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2. # This blank configuration will automatically use DHCP for any net.*
3. # scripts in /etc/init.d.  To create a more complete configuration,
4. # please review /etc/conf.d/net.example and save your configuration
5. # in /etc/conf.d/net (this file :]!).
6. bridge_br0="eth0"
7. brctl_br0=( "setfd 0" "sethello 0" "stp off" )
9. config_br0=( "192.168.0.8/24" )
10. routes_br0=( "default via 192.168.0.1" )
11. dns_domain_br0="domain.local"
12. dns_servers_br0="202.102.224.68 202.102.227.68"
13. dns_search_br0="domain.local"
15. config_eth0=("null")

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1. cd /etc/init.d
2. ln -s net.lo net.br0
3. rc-update add net.br0 default
4. rc-update del net.eth0

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方法2:手动配置网桥

2. # This blank configuration will automatically use DHCP for any net.*
3. # scripts in /etc/init.d.  To create a more complete configuration,
4. # please review /etc/conf.d/net.example and save your configuration
5. # in /etc/conf.d/net (this file :]!).
6. bridge_br0="eth0 tap0 tap1 tap2 tap3"
7. brctl_br0=( "setfd 0" "sethello 0" "stp off" )
8. rc_need_br0="net.tap0 net.tap1 net.tap2 net.tap3"
10. config_br0=( "192.168.0.8/24" )
11. routes_br0=( "default via 192.168.0.1" )
12. dns_domain_br0="domain.local"
13. dns_servers_br0="202.102.224.68 202.102.227.68"
14. dns_search_br0="domain.local"
16. config_tap0=( "null" )
17. tuntap_tap0="tap"
18. tunctl_tap0="-u shom"
19. mac_tap0="52:54:00:12:34:56"
21. config_tap1=( "null" )
22. tuntap_tap1="tap"
23. tunctl_tap1="-u shom"
24. mac_tap1="52:54:00:12:34:57"
26. config_tap2=( "null" )
27. tuntap_tap2="tap"
28. tunctl_tap2="-u shom"
29. mac_tap3="52:54:00:12:34:58"
31. config_tap3=( "null" )
32. tuntap_tap3="tap"
33. tunctl_tap3="-u shom"
34. mac_tap3="52:54:00:12:34:59"
36. config_eth0=("null")

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2. cd /etc/init.d
3. ln -s net.lo net.br0
4. ln -s net.lo net.tap0
5. ln -s net.lo net.tap1
6. ln -s net.lo net.tap2
7. ln -s net.lo net.tap3
9. rc-update add net.br0 default
10. rc-update del net.eth0
12. brctl addbr br0
13. ifconfig br0 192.168.0.8 netmask 255.255.255.0 up
14. tunctl -b -u  -t tap0
15. brctl addif br0 tap0
16. ifconfig tap0 up 0.0.0.0 promisc

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相关链接
KVM
http://en.gentoo-wiki.com/wiki/KVM#Required_packages
http://www.linux-kvm.org/page/Main_Page
HPET
http://www-01.ibm.com/support/docview.wss?uid=swg21443045
http://blog.fpmurphy.com/2009/07/linux-hpet-support.html
TUN/TAP
http://www.ibm.com/developerworks/cn/linux/l-tuntap/index.html

suran

为什么不让用html?
USB和VLAN，NAT，VDE支持部分还没用到，等到用的时侯再补充

tlze

也在用着KVM，先回复后再慢慢参考学习。

jsun

对于guest为xp，kvm、xen和virtualbox、vmware比感觉如何？我只想知道桌面应用的结果，不考虑大量guest的情况。

athlon_r

用libvirt 来管理也不错 省去手动很多麻烦。

johe

支持一下，过几天准备安装KVM